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#1 |
Lurking Renovator
Join Date: Jan 2019
Location: Czech Rep.
Posts: 14
Thanks: 0
Thanked 4 Times in 3 Posts
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![]() Hi community, I just want to share my successful built of 19kW ground-water heat pump. It’s completely open source, incl. calculations, chassis drawing, schematics and control software.
Anybody who wants to clone the construction is highly welcomed! Here are some highlights: - 19kW heating power - 65°C / 149°F max. output temperature - r134a refrigerant - 950 meters ground loop - easy to build - 8 temperature sensors - 4 pressure sensors - 2 flow sensors - EEV (with supercapacitor backed up closure on power failure) - Panasonic/Sanyo scroll compressor - soft starter - 2 circulation pumps - onboard control system running Linux - configuration via web browser Image gallery: ownCloud 3D model: https://cad.onshape.com/.../e/8527985f7e35e0cf1587fe34 KiCAD schematics and PCB on my Github: https://github.com/burgrp?utf8=%E2%9...ype=&language= Looking forward to see your comments! |
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#3 |
Journeyman EcoRenovator
Join Date: Oct 2011
Location: Cincinnati ohio
Posts: 338
Thanks: 41
Thanked 35 Times in 31 Posts
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![]() That’s beautiful! What kind of C.O.P are you getting?
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#4 |
Lurking Renovator
Join Date: Jan 2019
Location: Czech Rep.
Posts: 14
Thanks: 0
Thanked 4 Times in 3 Posts
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![]() Thanks. COP is not measured yet. The built-in pulse flow meter is working, but is not calibrated yet. As soon as I do calibration by another flow meter, I will let the software calculate COP and will post it here.
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#5 |
Uber EcoRenovator
Join Date: Apr 2011
Location: Strathroy Ontario Canada
Posts: 658
Thanks: 9
Thanked 193 Times in 131 Posts
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![]() Pavel
I'm impressed. That is a beautiful job.!!! You have went the extra mile with controls. Soft start will be well worth the effort for a machine that size. We can compare notes with my 5 ton DIY Randen |
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#6 | |
Lurking Renovator
Join Date: Jan 2019
Location: Czech Rep.
Posts: 14
Thanks: 0
Thanked 4 Times in 3 Posts
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![]() Quote:
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#7 |
Lurking Renovator
Join Date: Oct 2015
Location: portugal
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
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![]() Any idea of the total price of equipment and time to spend?
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#8 |
Lurking Renovator
Join Date: Jan 2019
Location: Czech Rep.
Posts: 14
Thanks: 0
Thanked 4 Times in 3 Posts
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![]() In terms of time, it was almost one year of development. Construction of the pump itself, when I had everything on table, took few days only, it went smooth, including refrigerant charging. In terms of money, the pump was about 2500 USD, collector 3500 USD.
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#9 |
Lurking Renovator
Join Date: Oct 2015
Location: portugal
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
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![]() What are the typical costs for producing energy now?
Mantainance eletricity etc... |
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#10 |
Lurking Renovator
Join Date: Jan 2019
Location: Czech Rep.
Posts: 14
Thanks: 0
Thanked 4 Times in 3 Posts
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![]() Here in Czech Republic, I would spend at least 3000 USD per year for direct electric heating. So it's quite a good ROI - if that's what you are asking for.
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Tags |
diy, gwhp, heat pump, heat pumps |
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