Heat pump water heater - Indoor water tank

This video shows the water tank and indoor control setup for the heat pump water heater.

The savings are quite good, about 50c per day for heat pump water heating, compared to 90c per day for gas water heating, and that's with the currently-cheap gas rates, which will shoot back up when the economy turns around.

Category:

Science & Technology

Tags:

• heat
• pump
• water
• heater
• hot
• air
• conditioner
• R290
• energy
• saving
• refrigeration

[douglas787]

Very nice videos and excellent design! I put together a system of my own but it is not very sophicated. I live in Texas, and I run my AC about 8 months a year. I simply ran a 3/8 line about 6 turns around the bottom of a old 50 gallon water heater tank. The 3/8 freon liquid line is put in series between the compresser output and the normal condenser input. I put a bunch of high temp grease to aid in heat transfer, and insulated. With the ac running most of the time it heats the water all we need

[tesla500]

@douglas787 Thanks!

That's a very good idea you had there, the heat you're getting is totally free assuming you're still using the full condenser that came with the air conditioner after the hot water tank removes whatever heat it can.

One thing to look out for is bacteria growth in the water if you're not reaching 60 degrees C (140F).

[MrEnergyCzar]

Nice job.....I got the new GE Energy Star Electric Heat Pump water heater and it saves over $300 per year on electricity.....

[ingesumadre]

Brilliant!! Where can I get a condensation like yours whit a heat pump?

[siliconebobsqpts]

Nice job except your relief drain...Code violation, you cannot drain a relief valve up hill. The valve may leak slightly rusting out the spring.

What are you doing for freeze protection, Warm climate?

[josephdupont]

so why not use your heat pump as a pre heat. And if it is too cool outside don't turn the heat pump on.

[lbdavisjr]

I'm your biggest fan. Check my system out.think about this put a tesla turbine on a heat pump to meter the gas and power all the low voltage loads and maybe the indoor and outdoor motors so the grid would only power the compressor. Tell what u think

[99cachorro]

nice job! ingenious.  check this low-tech method of water heating

[douglas787]

@tesla500 I didn't take bacteria into consideration. The water does get well above 140 degrees. I need to add a temp sensor and a solenoid valve to dump some water to my yard because if that thing runs all day long and nobody uses any hot water it gets near boiling. The t&p valve that was on the tank leaked so I capped it off (I know, safety violation). It does raise my seer rating on my AC system a good bit.Before my liquid line was about 120 degrees coming out of my condenser, now it's near 95

[jyslimful]

you should show the guys how to heat a place with water from city main using a heat pump