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AC_Hacker · 01-05-11, 11:31 AM

I have re-configured my heat pump to work as a Ground Source Shop Warmer. It is now running, warming my uninsulated basement shop.

I borrowed an automobile radiator from Bruce-the-Pirate and hooked up the output water loop (and circulation pump) to it. The setup, crude as it is, is working.

I'm using a box fan to blow air through the radiator.

The ground loop temperature pulled down to about 46 degrees... the radiator-loop temperature stabilized at around 73 degrees and after running it for several hours, the temperature in the unheated basement stabilized at 60 F... not too bad for a shop.

I haven't calculated efficiency for the setup (my estimate is COP =2), but it is clearly better than the 220 V, 2400 watt resistance heater I was previously using.

-AC_Hacker

01-05-11, 11:31 AM	#477
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	Ground Source Shop Warmer now working... I have re-configured my heat pump to work as a Ground Source Shop Warmer. It is now running, warming my uninsulated basement shop. I borrowed an automobile radiator from Bruce-the-Pirate and hooked up the output water loop (and circulation pump) to it. The setup, crude as it is, is working. I'm using a box fan to blow air through the radiator. The ground loop temperature pulled down to about 46 degrees... the radiator-loop temperature stabilized at around 73 degrees and after running it for several hours, the temperature in the unheated basement stabilized at 60 F... not too bad for a shop. I haven't calculated efficiency for the setup (my estimate is COP =2), but it is clearly better than the 220 V, 2400 watt resistance heater I was previously using. -AC_Hacker Last edited by AC_Hacker; 01-05-11 at 11:37 AM..