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Search: Posts Made By: pavel
Forum: Geothermal & Heat Pumps 03-24-19, 02:34 PM
Replies: 14
Views: 1,906
Posted By pavel
Git repositories have been moved under...

Git repositories have been moved under DEVICE.FARM organization:
https://github.com/device-farm?utf8=%E2%9C%93&q=nanook&type=&language=
Forum: Geothermal & Heat Pumps 02-27-19, 04:49 PM
Replies: 14
Views: 1,906
Posted By pavel
It could be controlled, but it seems to be not...

It could be controlled, but it seems to be not necessary. The secondary side is switched to minimum which is enough to transport the heat to accumulator tank. The primary side is switched to maximum,...
Forum: Geothermal & Heat Pumps 02-19-19, 05:42 PM
Replies: 14
Views: 1,906
Posted By pavel
There are three sequences controlled by the...

There are three sequences controlled by the software:

START:
- turn both circulation pumps ON
- close EEV by 500 steps, open EEV by 150 steps
- ramp compressor SSR up from 50% to 100% in 800ms...
Forum: Geothermal & Heat Pumps 02-17-19, 11:42 AM
Replies: 14
Views: 1,906
Posted By pavel
Here in Czech Republic, I would spend at least...

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.
Forum: Geothermal & Heat Pumps 02-16-19, 06:20 PM
Replies: 14
Views: 1,906
Posted By pavel
In terms of time, it was almost one year of...

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...
Forum: Geothermal & Heat Pumps 01-19-19, 06:02 PM
Replies: 14
Views: 1,906
Posted By pavel
Hi Randen, I like your drum design :) I wish my...

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!
Forum: Geothermal & Heat Pumps 01-16-19, 06:35 PM
Replies: 14
Views: 1,906
Posted By pavel
Thanks. COP is not measured yet. The built-in...

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...
Forum: Geothermal & Heat Pumps 01-16-19, 01:31 PM
Replies: 14
Views: 1,906
Posted By pavel
few images...

few images, just for case the link above does not work
Forum: Geothermal & Heat Pumps 01-16-19, 01:21 PM
Replies: 14
Views: 1,906
Posted By pavel
NANOOK - open source DIY 19kW GWHP

Hi community, I just want to share my successful built of 19kW ground-water heat pump. Itís completely open source, incl. calculations, chassis drawing, schematics and control software.
Anybody who...
Forum: Geothermal & Heat Pumps 01-16-19, 01:17 PM
Replies: 3
Views: 1,339
Posted By pavel
pressure sensors

If I got it right, you don't have any pressure sensor in your system at all, right? To calculate superheat, I would recommend to install at least one pressure sensor on suction compressor side. I use...
Forum: Geothermal & Heat Pumps 01-16-19, 12:43 PM
Replies: 9
Views: 4,962
Posted By pavel
Interesting

Thanks for posting
Forum: Geothermal & Heat Pumps 01-16-19, 12:13 PM
Replies: 14
Views: 3,029
Posted By pavel
The controller

Hi, just a small advice to the controller: for my DIY GWHP I run main controller process and management web console on NanoPi Duo board, which is Linux capable small board for few bucks. The software...
Forum: Geothermal & Heat Pumps 01-16-19, 12:02 PM
Replies: 1
Views: 673
Posted By pavel
I'm going to build data logger based on Postgres...

I'm going to build data logger based on Postgres database and Grafana service. It will log temperatures (20+ sensors) and power consumption using Hutermann HT-353D power meter. If you are interested,...
Forum: Geothermal & Heat Pumps 01-16-19, 11:58 AM
Replies: 146
Views: 37,910
Posted By pavel
Great job!

Great job!
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