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-   -   NANOOK - open source DIY 19kW GWHP (https://ecorenovator.org/forum/showthread.php?t=6836)

pavel 01-16-19 12:21 PM

NANOOK - open source DIY 19kW GWHP
 
Hi community, I just want to share my successful built of 19kW ground-water heat pump. Its 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
- 65C / 149F 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!

pavel 01-16-19 12:31 PM

few images...
 
10 Attachment(s)
few images, just for case the link above does not work

Fordguy64 01-16-19 05:13 PM

That’s beautiful! What kind of C.O.P are you getting?

pavel 01-16-19 05:35 PM

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.

randen 01-18-19 01:40 PM

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

pavel 01-19-19 05:02 PM

Quote:

Originally Posted by randen (Post 60488)
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

Hi Randen, I like your drum design :) I wish my NANOOK will be as reliable as your machine - 5 years in service, that's impressive!

johnnypeste 02-15-19 02:06 PM

Budget
 
Any idea of the total price of equipment and time to spend?

pavel 02-16-19 05:20 PM

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.

johnnypeste 02-17-19 05:12 AM

Costs
 
What are the typical costs for producing energy now?
Mantainance eletricity etc...

pavel 02-17-19 10:42 AM

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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