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"Rick C" wrote in message
news:c986b730-0e40-4b7f-a1a6-4b7e0d0b6bb3@googlegroups.com...
On Tuesday, November 5, 2019 at 5:01:03 AM UTC-5, Jasen Betts wrote:
And what do you do with the desiccant when it is saturated with water?
You blow hot air over it until it dries, and the wheel rotates the
dessicant back into the damp air flow.
What do you do with the hot, damp air? Blow it into the cool, damp air so
you have warm damp air?
Picture a wall with a long narrow slot. Put a wheel in the slot with one
end of the axle on one side of the slot and the other end of the axle on the
other side of the slot so half the wheel is on each side of the wall, and
put a sliding seal on the edges of the slot so each side is sealed from the
other side. Coat the wheel with dessicant. One side of the wall is exposed
to interior air and the interior moisture is absorbed by the dessicant as
this air is blown over the wheel. Rotate the wheel so the now saturated
dessicant is on the other side of the wall, exposed to the outside air.
Blow warm outside air over the dessicant to dry it out, exhausting the moist
warm air to the outside. Now rotate the wheel so the dry half is back
inside where it cools back down and takes up more moisture. Repeat ad
nauseum. Actually, of course, the wheel always turns but you get the idea.
The problems are the sliding seals, the lifespan of the dessicant, and the
heat carried into the house by the warm wheel, assuming it is hotter
outside.
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb...@gmail.com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
On Tuesday, November 5, 2019 at 7:41:11 AM UTC-5, Martin Brown wrote:
On 04/11/2019 15:28, Rick C wrote:
On Monday, November 4, 2019 at 8:06:24 AM UTC-5, Martin Brown wrote:
On 03/11/2019 17:15, Rick C wrote:
On Sunday, November 3, 2019 at 4:32:49 AM UTC-5, Martin Brown wrote:
I'm sure there are lots of ways to do this job more efficiently, but
really? You want the guy to run plumbing instead of wires for a 300
watt heater?
It is a way more appropriate solution to the problem than the DIY solar
PV approach and would be able to supply more heat than a puny 300W.
It's also a lot more work for a DIY project. A LOT more work.
It's not electronics but I'd say it is about the same amount of work and
it does involve some soldering of copper just with much bigger joints.
It will function considerably better although obviously it works best in
midsummer when you might be glad of the cool air in the basement.
I don't know what plumbing you have done, but the stuff I've done has been much harder than plugging in some connectors and maybe soldering a wire. I'm glad you find plumbing so easy.
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb...@gmail.com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabb...@gmail.com wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb...@gmail.com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead..
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
--
Bill Sloman, Sydney
That would work, but would need access to outdoor air & would be energy wasteful. Add 1 more conceptual step to get what practical dehumidifiers do.
NT
On Wednesday, 6 November 2019 01:40:52 UTC, Rick C wrote:
On Tuesday, November 5, 2019 at 7:41:11 AM UTC-5, Martin Brown wrote:
On 04/11/2019 15:28, Rick C wrote:
On Monday, November 4, 2019 at 8:06:24 AM UTC-5, Martin Brown wrote:
On 03/11/2019 17:15, Rick C wrote:
On Sunday, November 3, 2019 at 4:32:49 AM UTC-5, Martin Brown wrote:
I'm sure there are lots of ways to do this job more efficiently, but
really? You want the guy to run plumbing instead of wires for a 300
watt heater?
It is a way more appropriate solution to the problem than the DIY solar
PV approach and would be able to supply more heat than a puny 300W..
It's also a lot more work for a DIY project. A LOT more work.
It's not electronics but I'd say it is about the same amount of work and
it does involve some soldering of copper just with much bigger joints..
It will function considerably better although obviously it works best in
midsummer when you might be glad of the cool air in the basement.
I don't know what plumbing you have done, but the stuff I've done has been much harder than plugging in some connectors and maybe soldering a wire.. I'm glad you find plumbing so easy.
It's too often a pita but it's not complex.
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabb...@gmail.com wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb...@gmail..com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabby wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabby wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead..
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
On Thursday, November 7, 2019 at 1:37:11 PM UTC+11, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabby wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabby wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
They obviously don't have a condensor coil, and they'd work just as well at low temperature as high - which isn't very well.
Part of the job of a dehumidifier is to run a lot of air through the bit that takes out the water, and solid desiccants don't react well to having a lot of air blasted through them.
On Tuesday, November 5, 2019 at 7:41:11 AM UTC-5, Martin Brown
wrote:
On 04/11/2019 15:28, Rick C wrote:
On Monday, November 4, 2019 at 8:06:24 AM UTC-5, Martin Brown
wrote:
On 03/11/2019 17:15, Rick C wrote:
On Sunday, November 3, 2019 at 4:32:49 AM UTC-5, Martin Brown
wrote:
Plenty of designs about usually for heating swimming pools
or bulk thermal stores.
I'm sure there are lots of ways to do this job more
efficiently, but really? You want the guy to run plumbing
instead of wires for a 300 watt heater?
It is a way more appropriate solution to the problem than the
DIY solar PV approach and would be able to supply more heat
than a puny 300W.
It's also a lot more work for a DIY project. A LOT more work.
It's not electronics but I'd say it is about the same amount of
work and it does involve some soldering of copper just with much
bigger joints. It will function considerably better although
obviously it works best in midsummer when you might be glad of the
cool air in the basement.
I don't know what plumbing you have done, but the stuff I've done has
been much harder than plugging in some connectors and maybe soldering
a wire. I'm glad you find plumbing so easy.
On Thursday, 7 November 2019 04:24:20 UTC, Bill Sloman wrote:
On Thursday, November 7, 2019 at 1:37:11 PM UTC+11, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabby wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabby wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
They obviously don't have a condensor coil, and they'd work just as well at low temperature as high - which isn't very well.
Part of the job of a dehumidifier is to run a lot of air through the bit that takes out the water, and solid desiccants don't react well to having a lot of air blasted through them.
I just took one out of service. It worked perfectly well and never had any difficulty with the air fanned thru it. Not sure why you're fond of your opinions on a topic you don't know too well.
On Thursday, 7 November 2019 01:42:09 UTC, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabby wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabby wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
that would be a problem if it ever got that far. I've never known one do so.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Increasing fan speed increases the amount of warming from room air, thereby raising it above freezing point
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
desiccant wheel dehumidifiers are designed for precisely that.
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
I see you did not understand what I claimed. Nice to see you be civil for once.
On Thursday, November 7, 2019 at 5:14:23 PM UTC+11, tabby wrote:
On Thursday, 7 November 2019 04:24:20 UTC, Bill Sloman wrote:
On Thursday, November 7, 2019 at 1:37:11 PM UTC+11, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabby wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabby wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
They obviously don't have a condensor coil, and they'd work just as well at low temperature as high - which isn't very well.
Part of the job of a dehumidifier is to run a lot of air through the bit that takes out the water, and solid desiccants don't react well to having a lot of air blasted through them.
I just took one out of service. It worked perfectly well and never had any difficulty with the air fanned thru it. Not sure why you're fond of your opinions on a topic you don't know too well.
Of course it didn't. There wasn't much air being fanned through it, so it didn't capture much water, so the whole thing had to be quite a bit bigger than a heat-pump based dehumidifier to capture the same amount of water.
You don't have to know much to notice when some ignorant clown is talking through his hat.
On Thursday, November 7, 2019 at 5:10:04 PM UTC+11, tabby wrote:
On Thursday, 7 November 2019 01:42:09 UTC, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabby wrote:
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
that would be a problem if it ever got that far. I've never known one do so.
One of the many things that NT doesn't know.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Increasing fan speed increases the amount of warming from room air, thereby raising it above freezing point
If the room air is warm enough to make a difference.
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
desiccant wheel dehumidifiers are designed for precisely that.
Desiccant wheel dehumidifiers aren't designed. They are slapped together by people who haven't thought about what they are doing.
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
I see you did not understand what I claimed. Nice to see you be civil for once.
You imagine that I did not understand what you claimed. Since you haven't spelled out why, it seems reasonable to assert that you are pulling your usual trick of trying to look expert by evasion, rather than explanation.
You still look like an evasive poseur.
On Thursday, November 7, 2019 at 1:37:11 PM UTC+11, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabb...@gmail.com wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb...@gmail.com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
They obviously don't have a condensor coil, and they'd work just as well at low temperature as high - which isn't very well.
Part of the job of a dehumidifier is to run a lot of air through the bit that takes out the water, and solid desiccants don't react well to having a lot of air blasted through them.
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
Dan hasn't learned to snip yet - or to think all that well. Going to Princeton (or whatever ever it was) doesn't do anything much for a Tulane-level brain.
--
Bill Sloman, Sydney
On Wednesday, November 6, 2019 at 11:24:20 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 1:37:11 PM UTC+11, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabb...@gmail.com wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb...@gmail.com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
They obviously don't have a condensor coil, and they'd work just as well at low temperature as high - which isn't very well.
Part of the job of a dehumidifier is to run a lot of air through the bit that takes out the water, and solid desiccants don't react well to having a lot of air blasted through them.
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
Dan hasn't learned to snip yet - or to think all that well. Going to Princeton (or whatever ever it was) doesn't do anything much for a Tulane-level brain.
--
Bill Sloman, Sydney
Higher IQ , better univesity, more money
Dan
On Thursday, November 7, 2019 at 4:03:03 PM UTC-5, Rick C wrote:
On Thursday, November 7, 2019 at 2:46:01 PM UTC-5, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 11:24:20 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 1:37:11 PM UTC+11, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabb...@gmail.com wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb....@gmail.com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine..
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area..
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
They obviously don't have a condensor coil, and they'd work just as well at low temperature as high - which isn't very well.
Part of the job of a dehumidifier is to run a lot of air through the bit that takes out the water, and solid desiccants don't react well to having a lot of air blasted through them.
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
Dan hasn't learned to snip yet - or to think all that well. Going to Princeton (or whatever ever it was) doesn't do anything much for a Tulane-level brain.
--
Bill Sloman, Sydney
Higher IQ , better univesity, more money
Dan
What is required to be able to form compete sentences?
--
Rick C.
---- Get 1,000 miles of free Supercharging
---- Tesla referral code - https://ts.la/richard11209
What is required to communicate with the least amount of typing?
On Thursday, November 7, 2019 at 2:46:01 PM UTC-5, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 11:24:20 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 1:37:11 PM UTC+11, dca...@krl.org wrote:
On Wednesday, November 6, 2019 at 8:42:09 PM UTC-5, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabb...@gmail.com wrote:
On Wednesday, 6 November 2019 03:29:58 UTC, Bill Sloman wrote:
On Wednesday, November 6, 2019 at 12:30:48 AM UTC+11, tabb...@gmail.com wrote:
On Tuesday, 5 November 2019 06:07:55 UTC, Bill Sloman wrote:
On Tuesday, November 5, 2019 at 3:43:43 PM UTC+11, tabby wrote:
On Monday, 4 November 2019 14:54:48 UTC, Winfield Hill wrote:
John S wrote...
tabbypurr wrote:
And desiccant wheel dehumidifiers work just fine.
And what do you do with the desiccant when it is
saturated with water?
Do they become humidifiers, when (if) the air
otherwise becomes dry again?
The wheel slowly rotates, drying room air on one side, and drying the desiccant on the other. Pass hot air through it, which then circulates around a metal compartment. The metal is cooled by the room air, forming condensation thus removing damp from the compartment. Condensate drips into a container or down a pipe. These machines are ideal for unheated spaces, where compressor types become near useless.
I wonder why NT thinks that?
because it's correct
NT has probably run into a dehumifier that don't let its condensing coil get below the freezing point, where it'd ice up.
There are ways of dealing with this - as anybody who owns a modern freezer knows. You warm up the condensor coils from time to time to melt the ice and let it run off as water. This pretty much demands using a microcontroller and extra sensors.
NT doesn't think about stuff like that, so he probably ran into a dehumidifier that didn't work well in a cold room some time ago , and never bothered to work out why.
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
Desicant wheel dehumidifiers do not have a condensor coil and work well at low temperatures..
They obviously don't have a condensor coil, and they'd work just as well at low temperature as high - which isn't very well.
Part of the job of a dehumidifier is to run a lot of air through the bit that takes out the water, and solid desiccants don't react well to having a lot of air blasted through them.
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
Dan hasn't learned to snip yet - or to think all that well. Going to Princeton (or whatever ever it was) doesn't do anything much for a Tulane-level brain.
--
Bill Sloman, Sydney
Higher IQ , better univesity, more money
Dan
What is required to be able to form compete sentences?
--
Rick C.
---- Get 1,000 miles of free Supercharging
---- Tesla referral code - https://ts.la/richard11209
On Thursday, 7 November 2019 11:02:21 UTC, Bill Sloman wrote:
On Thursday, November 7, 2019 at 5:10:04 PM UTC+11, tabby wrote:
On Thursday, 7 November 2019 01:42:09 UTC, Bill Sloman wrote:
On Thursday, November 7, 2019 at 11:06:31 AM UTC+11, tabby wrote:
Domestic & industrial dehumidifiers normally switch off the compressor when they get to freezing point. (They continue to dehumidify until it warms up.) I say normally as I did encounter one that boosted fan speed instead.
The problem with an iced-up condensor coil is that the frost layer eventually gets thick enough to dramatically reduce the condensing area.
that would be a problem if it ever got that far. I've never known one do so.
One of the many things that NT doesn't know.
I know I've not encountered a dehumdifier that incompetently designed. No sensible engineer would let it run that way. Maybe yours do that.
Increasing fan speed is unlikely to help there, unless you make it fast enough to blast off the frost crystals
Increasing fan speed increases the amount of warming from room air, thereby raising it above freezing point
If the room air is warm enough to make a difference.
lol.
Dehumidifiers are not usually designed to dehumidify very cold areas, where the condensor coil would have to held below freezing to keep it below the dew (frost) point.
desiccant wheel dehumidifiers are designed for precisely that.
Desiccant wheel dehumidifiers aren't designed. They are slapped together by people who haven't thought about what they are doing.
lol. Are you really that clueless?
They could be. It's not an intrinsic fault of the heat-pump dehumidifier (as you originally claimed) but merely a feature of the normal implementation of the concept for the usual market.
I see you did not understand what I claimed. Nice to see you be civil for once.
You imagine that I did not understand what you claimed. Since you haven't spelled out why, it seems reasonable to assert that you are pulling your usual trick of trying to look expert by evasion, rather than explanation.
You still look like an evasive poseur.
You don't have more than a vague clue about this topic. What a prat.