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Search: Posts Made By: Ormston
Forum: Geothermal & Heat Pumps 09-24-17, 04:28 PM
Replies: 96
Views: 24,651
Posted By Ormston
I like the idea but struggle to see it working. ...

I like the idea but struggle to see it working.
The only way i see it heating the house by more than the power consumption is if the air expelled from the outlet hose is colder than the outside...
Forum: Renovations & New Construction 03-09-17, 05:03 PM
Replies: 5
Views: 2,570
Posted By Ormston
UK regs (not that they apply) state 50mm, this is...

UK regs (not that they apply) state 50mm, this is purely from a safety point of view and not interference.

The idea is that if the insulation on the Band 1 circuit (ethernet in your case) is not...
Forum: Geothermal & Heat Pumps 01-17-15, 05:49 AM
Replies: 11
Views: 4,911
Posted By Ormston
Peltier elements can work well in the right...

Peltier elements can work well in the right application.

I used some for cooling an overclocked pc processor several years ago, had a separate pc power supply just to feed the peltier which cooled...
Forum: Appliances & Gadgets 11-18-14, 05:44 PM
Replies: 35
Views: 49,695
Posted By Ormston
I was once asked to look at a device that had...

I was once asked to look at a device that had been retrofitted to an oil boiler heating a swimming pool.
The device had been sold as a fuel saver for what seemed like a lot of money at the time, I...
Forum: Geothermal & Heat Pumps 10-20-14, 05:24 PM
Replies: 15
Views: 5,661
Posted By Ormston
COP 5 sounds unachievable? What type of heat...

COP 5 sounds unachievable?
What type of heat pump are you using?

I was told of a system like this by a Worcester Bosch sales rep last year, not sure if it's something they are experimenting with...
Forum: Geothermal & Heat Pumps 10-18-14, 04:34 PM
Replies: 17
Views: 5,719
Posted By Ormston
For dhw heating the odr needs to be disabled as...

For dhw heating the odr needs to be disabled as it would limit water temp.

For hydronic heating purposes the odr limits water temp to just hot enough to keep the house warm.
It saves energy due...
Forum: Appliances & Gadgets 10-08-14, 02:46 PM
Replies: 18
Views: 5,811
Posted By Ormston
The BI Directional requirement is because it's AC...

The BI Directional requirement is because it's AC current, has nothing to do with import/export.

The library I mentioned does measure import/export using a single 100A ct exactly as you need, to...
Forum: Geothermal & Heat Pumps 09-27-14, 04:49 PM
Replies: 8
Views: 2,784
Posted By Ormston
This is the very reason for the ground loop to be...

This is the very reason for the ground loop to be insulated whenever it's withing 2m of foundations(and as it passes through them).

Whilst it's not desirable to run the ground loop that cold it...
Forum: Geothermal & Heat Pumps 09-27-14, 03:32 PM
Replies: 8
Views: 2,784
Posted By Ormston
GSHP manufacturers usually require glycol in the...

GSHP manufacturers usually require glycol in the ground loop to protect against freezing the evaporator HX (controller usually shuts down at -5 to -10C), it's quite normal for the water being...
Forum: Geothermal & Heat Pumps 09-26-14, 06:34 AM
Replies: 8
Views: 2,784
Posted By Ormston
Not totally convinced about the idea of compact...

Not totally convinced about the idea of compact ground loops close to the building, this goes against everything i was told on the Worcester Bosch GSHP installers course.

They are against the idea...
Forum: Renovations & New Construction 09-14-14, 04:27 PM
Replies: 46
Views: 12,659
Posted By Ormston
Making a few changes to my home energy monitoring...

Making a few changes to my home energy monitoring system(which will be added to this thread at some point) and noticed just how long it takes for the heatpump to start outputting heat after startup....
Forum: Renovations & New Construction 09-10-14, 02:16 PM
Replies: 588
Views: 308,989
Posted By Ormston
I don't doubt it takes more power to pump around...

I don't doubt it takes more power to pump around 800'

With 800' I only need to pump 1/2 GPM and very low flow temps to provide enough output.
Guess it depends on how leaky the house and how fast...
Forum: Geothermal & Heat Pumps 09-09-14, 03:42 PM
Replies: 331
Views: 100,051
Posted By Ormston
I wouldn't rule out the cheap flow meters just...

I wouldn't rule out the cheap flow meters just yet, I may of got a bad one.

If valves were installed either side of the flow meter so it could be replaced with minimum loss of water it wouldn't be...
Forum: Renovations & New Construction 09-08-14, 03:03 PM
Replies: 46
Views: 12,659
Posted By Ormston
Realised i forgot to post the floor screed pics. ...

Realised i forgot to post the floor screed pics.

http://ecorenovator.org/forum/attachment.php?attachmentid=4645&stc=1&d=1410200002
...
Forum: Renovations & New Construction 09-08-14, 02:58 AM
Replies: 80
Views: 24,018
Posted By Ormston
AC Is there any special reason/regulation...

AC

Is there any special reason/regulation for sticking with the suspended floor?

In our house we had 2 rooms with suspended floor then the hallway and kitchen were solid concrete on soil.
We...
Forum: Renovations & New Construction 09-04-14, 07:31 AM
Replies: 27
Views: 7,363
Posted By Ormston
Pipe is 17x2 PEX, that is 17 OD and 2mm wall. ...

Pipe is 17x2 PEX, that is 17 OD and 2mm wall.
As this is a renovation project things were incomplete when we moved in last November, I manually balanced the flow through each zone and run the...
Forum: Solar Power 09-02-14, 02:56 AM
Replies: 15
Views: 8,923
Posted By Ormston
Probably stating the obvious here but check your...

Probably stating the obvious here but check your mains voltage at the time of day you expect maximum solar output.
Add this to the maximum voltage drop you calculated and check it,s well under the...
Forum: Geothermal & Heat Pumps 08-18-14, 05:13 PM
Replies: 331
Views: 100,051
Posted By Ormston
AC/BBP My thinking behind the delays which...

AC/BBP

My thinking behind the delays which may well be flawed.

Startup inlet pump and wait to make sure temp is above minimum including water from far end of ground loop, also make sure flow...
Forum: Geothermal & Heat Pumps 08-16-14, 03:06 PM
Replies: 331
Views: 100,051
Posted By Ormston
AC A is 22mm copper pipe (metric equivalent...

AC

A is 22mm copper pipe (metric equivalent or 3/4 though not sure how close in size they are), it sits inside B/C with an olive as a seal(compression fitting).
Known as a 3/4 female iron.
BSP -...
Forum: Geothermal & Heat Pumps 08-15-14, 07:01 PM
Replies: 331
Views: 100,051
Posted By Ormston
This is my setup, 3/4" version and I'm sure it's...

This is my setup, 3/4" version and I'm sure it's 3/4 BSP.
Parallel thread but seems to seal with plenty of PTFE tape.

My flow sensor is now completely dead, was installed last Oct/Nov so not...
Forum: Geothermal & Heat Pumps 08-15-14, 03:14 AM
Replies: 331
Views: 100,051
Posted By Ormston
Code running when no heat demand is due to the...

Code running when no heat demand is due to the main point of this sketch Being a controlled startup and shutdown of the heat pump, shutdown takes 5 mins after demand for heat goes false.

Flows...
Forum: Geothermal & Heat Pumps 08-14-14, 04:42 PM
Replies: 331
Views: 100,051
Posted By Ormston
Spent some more time trying to get the thermistor...

Spent some more time trying to get the thermistor lib used in the sketches above working.
For whatever reason it doesn't work in an Arduino simulator so unless anyone has any objections i'm going...
Forum: Geothermal & Heat Pumps 08-14-14, 08:07 AM
Replies: 331
Views: 100,051
Posted By Ormston
Try this V0.00001 Made a couple of corrections...

Try this V0.00001
Made a couple of corrections and added input D8 to simulate flow sensors reading 10L/m for testing.
Run code on simulator and seems OKish except the thermistor code, can't get...
Forum: Geothermal & Heat Pumps 08-14-14, 03:34 AM
Replies: 331
Views: 100,051
Posted By Ormston
AC Outputs shouldn't be blinking so I,be got...

AC

Outputs shouldn't be blinking so I,be got an issue somewhere. Also will need the ability to disable flow sensors or we won,t get very far with testing.
Will take a look later, off to work now.
Forum: Geothermal & Heat Pumps 08-13-14, 06:02 PM
Replies: 331
Views: 100,051
Posted By Ormston
After a PM conversation with AC yesterday i...

After a PM conversation with AC yesterday i agreed to write some code to hopefully get the GPHP controller started.

Below is a first draft, it compiles fine but i haven't had time to set up any...
Showing results 1 to 25 of 32

 
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