L
Lasse Langwadt Christensen
Guest
onsdag den 15. marts 2023 kl. 21.42.21 UTC+1 skrev Carlos E.R.:
hope you don\'t have hard water
On 2023-03-15 18:05, Ricky wrote:
On Wednesday, March 15, 2023 at 6:37:10â¯AM UTC-4, Carlos E.R. wrote:
On 2023-03-15 05:22, Ricky wrote:
On Tuesday, March 14, 2023 at 11:12:02â¯PM UTC-4, Carlos E.R. wrote:
On 2023-03-14 18:03, Ricky wrote:
On Tuesday, March 14, 2023 at 6:11:27â¯AM UTC-4, Carlos E.R. wrote:
On 2023-03-14 10:45, Ricky wrote:
On Tuesday, March 14, 2023 at 4:59:28â¯AM UTC-4, Carlos E.R. wrote:
On 2023-03-14 05:16, Ricky wrote:
On Monday, March 13, 2023 at 7:57:57â¯PM UTC-4, Lasse Langwadt Christensen wrote:
tirsdag den 14. marts 2023 kl. 00.35.00 UTC+1 skrev Lamont Cranston:
On Monday, March 13, 2023 at 6:15:00â¯PM UTC-5, Tabby wrote:
returning the water via the cold circuit is multiple kinds of wrong. Power the circulating pump from a kitchen PIR.
But, I\'m sure you can understand that in most instances, people are not willing to re-plumb their home to make use
of a recirculating pump. Also, recirculating the water is preferable to dumping in the drain. In my area the cost for sewer
is almost 2 times the cost of the water.
btw, could you list those multiple kinds of wrong?
Mikek
you generally don\'t want any risk of getting contamination, including your hot water, into the potable cold water system
So hot water is not potable??? I never knew that. I guess everytime I run the hot water, I should then run the cold water a while to clean the tap?
This whole idea of running hot water through the system to keep the water in the pipe hot is silly. They make instant hot water heaters for sinks, that do this job and only need an outlet.
Not everybody can use those; they need an ample electricity supply.
For a sink, it uses a standard 120V, 15A connection. Who doesn\'t have that??? Are you talking about some third world country? If they can\'t power this unit, how could they possibly power a hot water tank? Mine is 240V, 18A.
Most houses here have a contract that limits total instant power to 3.5
KW. It certainly is not a third world country. You can have more power,
up to 15 KW, but it is significantly more expensive.
Hot water tanks take 1 KW, maybe two if the tank is big. Mine I changed
to take 0.5 KW.
It must take forever to heat a tank of water. Sounds rather dysfunctional. My microwave oven uses more than 0.5 kW and it is some 40 years old.. A hair dryer uses 1.44 kW. I guess you have to turn off all sorts of things to use a stove. But then maybe you have gas. No, if that were true, you would have a gas hot water heater.
Sorry, this is not very easy for me to digest. The water uses the same amount of energy to heat up if you do it at 0.5 kW, or 5 kW. I just can\'t picture how it can be practical at 0.5 kW. I can take a shower and have a tank full of hot water in an hour. At 500 watts, it takes 10 hours.
Actually, it takes about four hours, the tank has 50 litres. Runs on a
timer during the night, if I activate it. I prefer the gas fired on
demand hot water system (yes, I have both systems). There is only one
person in the house, I don\'t need the hot water tank to reheat till next
day.
Wow! I\'m sorry, but that\'s clearly not first world. Or something is wrong with the math. 4 hours of 500W is 2 kWh, or 7.2 million joules. Divide by 4.186 (water specific heat) to get 1.7 million g°C, or 1,700 liter°C. That\'s around 34 °C for 50 liters. So room temperature to 130°F or about 55°C.
Well, if it starts at 20°C then in 4 hours it goes to 54°C, which is hot
enough to burn the skin. If the tank was not fully spent, it goes up to
70°C, which is about the max temp I set.
(room temp typically 20°C)
So you live somewhere hot like Puerto Rico, where the water never comes in cold. Still, the math doesn\'t lie. I don\'t know why you would want 70°C water. That\'s dangerously hot. 55°C will give you a first degree burn if you keep your hand under it until you are forced to pull it away.. 70°C will give you second degree burns, even if you pull your hand away. Not the best idea.
Because a 50 litres tank at 70°C lasts a longer shower than a tank at
50°C, or two people. That\'s how it is done here. You simply mix the hot
water with cold. Me, I set the tank to a hotter temp in winter than in
summer.
hope you don\'t have hard water