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Forum: Geothermal & Heat Pumps 11-23-21, 12:42 PM
Replies: 3
Views: 6,777
Posted By Acuario
The normal method is a hot gas defrost. Basically...

The normal method is a hot gas defrost. Basically the refrigerant flow is changed so hot liquid refrigerant flows to the condenser instead of cold liquid, this then defrosts the condenser in 'super...
Forum: Solar Power 11-19-21, 11:50 PM
Replies: 9
Views: 20,965
Posted By Acuario
It's a capacitor - from the voltage it's probably...

It's a capacitor - from the voltage it's probably on the output of the inverter although it's value 3.3uF seems high for that. It is often used to remove rf noise or spikes in voltage (transients). ...
Forum: Conservation 11-10-21, 11:54 PM
Replies: 22
Views: 68,471
Posted By Acuario
That looks like a monster! My backup oil...

That looks like a monster!

My backup oil boiler is considerably smaller and uses 180W when running.

The only thing that consumes power should be the blower fan when the boiler is actually...
Forum: Lawn and Garden 02-02-21, 10:22 AM
Replies: 13
Views: 32,966
Posted By Acuario
I've finally finished (well, probably as finished...

I've finally finished (well, probably as finished as any homebrew project ever gets save the inevitable modifications!) the heating system for the greenhouse.

Typically January/February are the...
Forum: Solar Heating 01-22-21, 02:14 AM
Replies: 7
Views: 33,257
Posted By Acuario
I guess it depends partly on your feelings about...

I guess it depends partly on your feelings about large amounts of stored water that you then use.

With the more typical large storage tank that you then consume water from you are using 'older'...
Forum: Geothermal & Heat Pumps 01-19-21, 01:11 PM
Replies: 14
Views: 25,710
Posted By Acuario
A few pointers.. If you get the code up and...

A few pointers..
If you get the code up and running then:
If you open Windows Explorer and go to Network you should see your heatpump listed there, double click to open the web interface..

If...
Forum: Geothermal & Heat Pumps 01-19-21, 12:45 PM
Replies: 14
Views: 25,710
Posted By Acuario
I actually have my own designed board that I use...

I actually have my own designed board that I use - it is actually a slightly hacked board that I use for my thermostats but it has everything I need. It has the ESP-12 soldered onto the pcb - I just...
Forum: Geothermal & Heat Pumps 01-19-21, 02:15 AM
Replies: 14
Views: 25,710
Posted By Acuario
Sounds interesting... The ESP32 is a good...

Sounds interesting...
The ESP32 is a good option if starting from nothing as you say, more GPIO and ADC possibilities. There is also onboard bluetooth and it is also possible to connect an ethernet...
Forum: Geothermal & Heat Pumps 01-16-21, 12:57 PM
Replies: 4
Views: 17,556
Posted By Acuario
Interesting information about the defrost, I'll...

Interesting information about the defrost, I'll study it a bit more - I'm still playing with different ideas rather than just temperatures - the latest I'm investigating is using a small fan with an...
Forum: Solar Heating 01-13-21, 07:27 AM
Replies: 14
Views: 37,287
Posted By Acuario
If your connections are as you say then they are...

If your connections are as you say then they are the wrong way around.
Heat always travels from hot to cold, never the reverse.

You need to feed the hottest water to the hottest point of the tank...
Forum: Solar Heating 01-13-21, 12:25 AM
Replies: 14
Views: 37,287
Posted By Acuario
Have you measured the entry/exit temperatures of...

Have you measured the entry/exit temperatures of the water passing through the tank? And the temperature at the lowest point of the heat exchanger?

What is the delta across the heat exchanger? The...
Forum: Solar Heating 01-11-21, 11:28 PM
Replies: 14
Views: 37,287
Posted By Acuario
If your pump isn't shutting down then it sounds...

If your pump isn't shutting down then it sounds to me like there is a fault with the controller. From above, with an 8 degrees difference the pump should stop, you say it continues to run (but...
Forum: Geothermal & Heat Pumps 01-11-21, 02:17 AM
Replies: 4
Views: 17,556
Posted By Acuario
It's been a while since I updated this post but...

It's been a while since I updated this post but development certainly hasn't stopped...

I've made significant changes to the heatpump controller by adding in predictive weather heating/cooling...
Forum: Geothermal & Heat Pumps 12-19-20, 12:30 PM
Replies: 3
Views: 12,230
Posted By Acuario
Wow, a BIG solar system, my solar isn't quite as...

Wow, a BIG solar system, my solar isn't quite as big, I have 2K of panels, 10K lithium batteries (Pylontech) and a 4.4K Studer inverter that's now about 14 years old so not much chance of getting...
Forum: Geothermal & Heat Pumps 12-10-20, 09:31 AM
Replies: 3
Views: 12,230
Posted By Acuario
Running a heatpump on solar power

Has anyone run a heatpump on solar power?

To date I've run mine on the grid but I also have a solar electric installation (and solar hot water/heating but that's another subject).

I was using...
Forum: Geothermal & Heat Pumps 12-10-20, 08:55 AM
Replies: 7
Views: 16,549
Posted By Acuario
When I added the predictive weather code and had...

When I added the predictive weather code and had it running it wasn't windy.
Where I live it can be very windy and the last few days it has been both windy and cold.
I was surprised what a...
Forum: Geothermal & Heat Pumps 12-05-20, 01:10 AM
Replies: 7
Views: 16,549
Posted By Acuario
I've updated my heatpump controller code a little...

I've updated my heatpump controller code a little to include nighttime reduction (which is configurable) so the heating temperature reduces overnight.

I've now had the predictive weather code...
Forum: Solar Heating 11-12-20, 12:04 AM
Replies: 14
Views: 31,840
Posted By Acuario
A very sharp knife and a lot of care! When I have...

A very sharp knife and a lot of care! When I have to remove PEX fittings I cut a deep slit into the pipe the length of the fitting following the line of the pipe, but not down to the fitting. At the...
Forum: Solar Heating 11-03-20, 02:08 AM
Replies: 4
Views: 13,197
Posted By Acuario
I'm currently getting around 7C increase per...

I'm currently getting around 7C increase per panel. I can't increase the flow through the panels and the HX is quite small bore so there is a limit to what I can pass through it.

My thoughts are:...
Forum: Geothermal & Heat Pumps 11-01-20, 03:32 PM
Replies: 7
Views: 16,549
Posted By Acuario
It's all diy - the controller and installation...

It's all diy - the controller and installation anyway. The heatpump itself is a basic compressor/fan/reversing valve unit that I have added my own controller and control software to.

I describe it...
Forum: Solar Heating 11-01-20, 07:20 AM
Replies: 4
Views: 13,197
Posted By Acuario
Question Configuring hot water solar panels

I currently have 3 solar water panels connected in series to provide heating to my underfloor heating in the house.

As I write (a nice sunny Sunday at 13h) the water temperature in the floor is...
Forum: Geothermal & Heat Pumps 11-01-20, 03:46 AM
Replies: 7
Views: 16,549
Posted By Acuario
Setting temperature via weather feed

I may have posted about this before but anyway this is an update and it's now working...

It is now cool at night so time to run the heatpump which is connected to the under floor heating in my...
Forum: Geothermal & Heat Pumps 11-01-20, 03:24 AM
Replies: 18
Views: 19,043
Posted By Acuario
If you investigate the motor a bit more you'll...

If you investigate the motor a bit more you'll probably find one of the wires is providing a square wave pulse output that varies depending on the speed of the motor.

It should be fairly simple to...
Forum: Geothermal & Heat Pumps 06-29-20, 07:14 AM
Replies: 15
Views: 23,937
Posted By Acuario
Improving cooling efficiency?

I was thinking the other day, in the summer I'm obviously running my heatpump in cooling mode. The compressor is still just doing it's job and compressing gas so generating a lot of heat that then...
Forum: Lawn and Garden 05-27-20, 07:09 AM
Replies: 27
Views: 64,919
Posted By Acuario
For water or for electric?

For water or for electric?
Showing results 1 to 25 of 221
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