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Search: Posts Made By: Ormston
Forum: Geothermal & Heat Pumps 09-25-17, 05:24 PM
Replies: 96
Views: 17,053
Posted By Ormston
It's in the name "Heat Pump" it pumps heat from...

It's in the name "Heat Pump" it pumps heat from one place to another.

A GSHP pumps heat out of the ground into the house.
A ASHP pumps heat out of the external air and into the the house.
A...
Forum: Geothermal & Heat Pumps 09-25-17, 04:40 PM
Replies: 96
Views: 17,053
Posted By Ormston
Sorry my understanding of heatpumps does not...

Sorry my understanding of heatpumps does not allow for heat to be created from nothing.

Please don't waste any money on this.

Steve
Forum: Geothermal & Heat Pumps 09-25-17, 01:47 PM
Replies: 96
Views: 17,053
Posted By Ormston
Unless those other heat sources are outside the...

Unless those other heat sources are outside the thermal envelope of the house you're stealing heat from one part of the house to give to another.
So no net gain.
Forum: Geothermal & Heat Pumps 09-25-17, 03:42 AM
Replies: 96
Views: 17,053
Posted By Ormston
The COP and amount of heat output are...

The COP and amount of heat output are measured/calculated under a certain set of test conditions.
As there test setup likely did mot involve exactly what you are looking at doing then the ratings...
Forum: Geothermal & Heat Pumps 09-25-17, 02:53 AM
Replies: 96
Views: 17,053
Posted By Ormston
We are talking about a heat pump, it doesn,t...

We are talking about a heat pump, it doesn,t create, destroy, amplify, magnify, concentrate or otherwise pull heat from the ether.
It's only purpose in life is to move heat from one place to...
Forum: Geothermal & Heat Pumps 09-24-17, 04:28 PM
Replies: 96
Views: 17,053
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: The Billiards Room 06-10-17, 02:00 PM
Replies: 9
Views: 2,131
Posted By Ormston
There are a number of options for motor speed...

There are a number of options for motor speed control, it all depends on how big the motor needs to be and how cheap you want it.

Simplest is probably a dc motor from a treadmill, scooter or...
Forum: Renovations & New Construction 03-09-17, 05:03 PM
Replies: 5
Views: 1,710
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 02-04-17, 02:01 PM
Replies: 13
Views: 3,663
Posted By Ormston
As you are now measuring inside, outside and...

As you are now measuring inside, outside and water temperature you have all the inputs you need for a simple automated weather compensation.
That may well be close enough that you don't notice any...
Forum: Geothermal & Heat Pumps 02-02-17, 05:45 AM
Replies: 13
Views: 3,663
Posted By Ormston
Acuario You say the floor is typically 31 to...

Acuario

You say the floor is typically 31 to 34 and needs increasing for exceptional weather, is your controller allowing for outside temperature (weather compensation) or just working at a fixed...
Forum: Renovations & New Construction 10-18-15, 04:59 AM
Replies: 3
Views: 3,935
Posted By Ormston
Thanks Mikesolar Screed will be 120mm thick...

Thanks Mikesolar

Screed will be 120mm thick on 140mm of insulation, bit thicker than the norm but that's the way the levels are working out to match the existing floor.

Think i will miss out...
Forum: Renovations & New Construction 10-17-15, 01:54 PM
Replies: 3
Views: 3,935
Posted By Ormston
Underfloor heating(hydronic) beneath fridge freezer

We are about to lay the underfloor heating in our extension and i've started to think about which areas to avoid?

Should i be laying pipes under the fridge freezer?
I'm not expecting the water to...
Forum: Conservation 10-08-15, 02:41 PM
Replies: 30
Views: 7,025
Posted By Ormston
Yes we call it Microbore, 8mm OD used to be...

Yes we call it Microbore, 8mm OD used to be common.
Generally 10mm OD minimum now although mostly 15mm, 8mm and i guess 10mm to a lesser degree has a tendency to become blocked with sludge in older...
Forum: Wind Power 10-06-15, 04:59 PM
Replies: 18
Views: 6,766
Posted By Ormston
Your numbers are off by a factor of well over...

Your numbers are off by a factor of well over 1000!
At 2mph the betz limit (maximum possible energy with a perfect generator and rotor) is 10w for a 7M turbine.

Looking at the average wind speed...
Forum: Wind Power 10-04-15, 02:13 PM
Replies: 18
Views: 6,766
Posted By Ormston
meescha I looked into turbines a while ago...

meescha

I looked into turbines a while ago then realised just how big i would need to build to make any useful power and abandoned the idea.

You need to find out the wind speeds then put...
Forum: Appliances & Gadgets 08-23-15, 05:50 PM
Replies: 23
Views: 6,817
Posted By Ormston
I think windows 10 is heading in the right...

I think windows 10 is heading in the right direction after the abomination of win 8/8.1, but they should have waited until it was ready before releasing.

Using it on surface pro 3 and battery life...
Forum: Lighting 07-25-15, 03:16 AM
Replies: 11
Views: 4,448
Posted By Ormston
I had several blow/fail at a customers house. ...

I had several blow/fail at a customers house.

Wired their kitchen extension with 8 downlights and fitted GU10 LED lamps, the ones with 20 ish surface mount LED's.
After about a month i was...
Forum: Conservation 06-01-15, 03:59 AM
Replies: 8
Views: 2,914
Posted By Ormston
We are going for plastic water pipe, either 4...

We are going for plastic water pipe, either 4 loops of 25mm or 2 loops of 32mm, each loop 100m.


Simpler to run than earth tubes and takes less of a chunk from the foundations. Also more...
Forum: Conservation 05-29-15, 12:08 PM
Replies: 8
Views: 2,914
Posted By Ormston
Sounds like a nice system, Was the air much...

Sounds like a nice system, Was the air much cooler than the outside ambient temp ?


Our climate is 6 months heating and 1 to 2 months cooling.

The summer cooling is only part of why i want to...
Forum: Conservation 05-29-15, 11:52 AM
Replies: 8
Views: 2,914
Posted By Ormston
We are not going for passive airflow, don't think...

We are not going for passive airflow, don't think it would be very easy to achieve with the design of the house and duct rout's we have done.
We have 3 rooflights on the 2nd floor which can be kept...
Forum: Conservation 05-28-15, 05:37 PM
Replies: 8
Views: 2,914
Posted By Ormston
Any experience with earth tubes.

Looking for advice on earth tubes. (pipes that run underground to collect/dump heat from outside air as it is drawn into the house)

We have a whole house MHRV system i installed during the...
Forum: Geothermal & Heat Pumps 01-18-15, 10:20 AM
Replies: 11
Views: 3,935
Posted By Ormston
Yes it would take lots and lots of peltiers to...

Yes it would take lots and lots of peltiers to move a few KW.
From what i remember mine was around 250W (power consumption) and was supposed to pump 150W of heat, so the processor had 150W of...
Forum: Geothermal & Heat Pumps 01-17-15, 05:49 AM
Replies: 11
Views: 3,935
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: Renovations & New Construction 12-18-14, 02:55 AM
Replies: 36
Views: 7,402
Posted By Ormston
90m2 currently lived in but open to the attic...

90m2 currently lived in but open to the attic which is mid conversion and not fully insulated yet so we are heating around 135m2.

My question with the passive haus localisation is how is this...
Forum: Renovations & New Construction 12-16-14, 03:36 PM
Replies: 36
Views: 7,402
Posted By Ormston
The passive haus requirements do seem a bit...

The passive haus requirements do seem a bit strange, very tight heating/cooling limits but sloppy overall consumption limit.
We are well within the 120kwh/yr/m2 (around 70) and not far off the...
Showing results 1 to 25 of 131

 
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