The Homemade Heat Pump Manifesto

[dragvorl]

Hi guys, I joined the forum because of this thread, so I would like to thank AC hacker and all the others for the useful information I found here. I'm thinking about building a system like this, but I want to ask a few questions about heat exchangers. First, I've seen that water to water exchanger on your first heatpump Ac hacker, if I am not mistaking? Is that heat exchanger efficient enough for refrigerant gases as well, or it's a little less efficient in these heat pump applications? I'm thinking about a heat exchanger like the one on the picture, freon flowing in the copper tubes, and the copper tube would be put in a bigger tube which would be filled with water coming from the well? What do you think about it, would it be good enough for this application?

EDIT: I can't post links or images, so I left the link of the pic.

renewableenergyengineering.com/yahoo_site_admin/assets/images/Six-Heat-Exchanger-Coils.122132611_std.jpg