Ground source heat

[tayside renewables]

Heat pump will heat domestic hot water to 45 to 55 degrees no problem, we design all internal system to a 40 degree flow temperature so works great with under floor heating and with conventional radiators the oversize factor is 4.3 so 1kW of heat required = 4.3kW of radiator.

 

[simon-0116]

Need immersion to kill leginers bug. think it needs to go up to 55 degree every 2 week. someone more clued ip will know

 

[Y Fan Wen]

No heat in the ground in my area! Ground source heating is a totally wrong description of the system. My understanding is that electricity is used to run a refridgeration unit.( air con,fridge ,freezer ) but the heat is kept in the house and all the underground pipes do is get rid of the cold. spend thousands of pounds on a system that through the process of refrigeration multiplies your kwh units of electricity by 3 over a 50 quid eletric fire. you certainly dont get heat from the ground. not in west wales!

I really laughed at that statement!

 

[john432]

I really laughed at that statement!

Would you care to prove me wrong? Explain the following:-
Why doesn't air sorce heating work in very cold weather?
Why it's better to have the underground pipes in damp dense clay than in a stony dry ground?

 

[scholland]

Would you care to prove me wrong? Explain the following:-
Why doesn't air sorce heating work in very cold weather?
Why it's better to have the underground pipes in damp dense clay than in a stony dry ground?

I have ground source heat pump, my ufh heating is very warm and keeps our house nice and warm. Pretty sure the ground is much the same temp here as where you are.

 

[Y Fan Wen]

Would you care to prove me wrong? Explain the following:-
Why doesn't air sorce heating work in very cold weather?
Why it's better to have the underground pipes in damp dense clay than in a stony dry ground?

1. Because of the practical problem of preventing the moisture in the atmosphere freezing on the coils and it then acts as an insulator. Same as why you defrost a fridge/freezer to keep the efficiency up.
2. In stony dry ground the pipes draw the heat out of the immediate vicinity and then, because it's dryish and air is a good insulator, the heat nearby cannot migrate over to the pipe which is what normally happens in wetter soils where the water is moving.
Theoretically, you can extract heat from any source down to -273C which is absolute zero. Practically, water freezing point is what limits things for us.

 

[ashelton]

Is it any good in wet yellow clay @ashelton.
Your location isn't showing.

Yes very well.
No problems at all. Copes with it like a self propelled machine but at a tenth of the cost.

 

[john432]

We are all on this world to learn ,and be corrected,So cold coolant goes out of the house, through the pipes underground around a sizable area,and comes back at a higher temp, be it still a chilly ground temp. So yes that means you have extracted heat from the ground. Isacc Newton said if I remember my O level physics" energy cannot be created or destroyed, just changed from one type to another." So if you get 3kw's of heat for 1kw of eletric Newton's law would mean it would have to come from the ground,Still a lot of cost , think a little wood burner in a well insulated house would be far more effecient!

 

[Grassman]

We are all on this world to learn ,and be corrected,So cold coolant goes out of the house, through the pipes underground around a sizable area,and comes back at a higher temp, be it still a chilly ground temp. So yes that means you have extracted heat from the ground. Isacc Newton said if I remember my O level physics" energy cannot be created or destroyed, just changed from one type to another." So if you get 3kw's of heat for 1kw of eletric Newton's law would mean it would have to come from the ground,Still a lot of cost , think a little wood burner in a well insulated house would be far more effecient!

You might think that but I can assure you it works.
I will be having a wood burner as well but my neighbour never used his last year.

 

[Farmer_Joe]

the have an immersion booster built in for the legionala (or exception circumstances such as massive demand) as was rightly said heats the water really hot to kill it every so often but also if you run a big bath to would boost this, however i got a large bath on my refurb (splashed out) much wider than std and it fills this with ease with no immersion boost, to be honest its the best system ive experienced for hot water as its always running it prioritises hot water so its pretty much always full. This does depend on the boiler you have mines all in one like 6 foot tall with tanks built in works spot on.

i must stress as other have said it really depends on the installation, mines 300m (to be fair i wish i had put more in but this was what was recommended) in a 300m trench min 1m deep in wet clay ground (i.e not 1m wide with pipe run back and forth same trench 150m long) so it recovers ok, but im sure it would be better 400m + to be honest

 

[Grassman]

the have an immersion booster built in for the legionala (or exception circumstances such as massive demand) as was rightly said heats the water really hot to kill it every so often but also if you run a big bath to would boost this, however i got a large bath on my refurb (splashed out) much wider than std and it fills this with ease with no immersion boost, to be honest its the best system ive experienced for hot water as its always running it prioritises hot water so its pretty much always full. This does depend on the boiler you have mines all in one like 6 foot tall with tanks built in works spot on.

i must stress as other have said it really depends on the installation, mines 300m (to be fair i wish i had put more in but this was what was recommended) in a 300m trench min 1m deep in wet clay ground (i.e not 1m wide with pipe run back and forth same trench 150m long) so it recovers ok, but im sure it would be better 400m + to be honest

What manufacturer is your heat pump @Farmer_Joe

 

[ashelton]

the have an immersion booster built in for the legionala (or exception circumstances such as massive demand) as was rightly said heats the water really hot to kill it every so often but also if you run a big bath to would boost this, however i got a large bath on my refurb (splashed out) much wider than std and it fills this with ease with no immersion boost, to be honest its the best system ive experienced for hot water as its always running it prioritises hot water so its pretty much always full. This does depend on the boiler you have mines all in one like 6 foot tall with tanks built in works spot on.

i must stress as other have said it really depends on the installation, mines 300m (to be fair i wish i had put more in but this was what was recommended) in a 300m trench min 1m deep in wet clay ground (i.e not 1m wide with pipe run back and forth same trench 150m long) so it recovers ok, but im sure it would be better 400m + to be honest

Thease are some of the advantages of using a trencher to install GHS pipe work rather than using a digger.

1. Minimal disturbance.
2. Consistency of depth.
3.Efficiency and speed up 10X faster.
4.Pipe layed in a one pass operation.
5.laser guided to allow you to put a fall on the pipe work to reduce the chances of air locks.
6.Variable trench spacings to give you better heat recovery.
7.Variable trench widths.
8.Loose friable soil for better back filling in most cases saving sanding the pipe.

 

[rarajon]

Thease are some of the advantages of using a trencher to install GHS pipe work rather than using a digger.

1. Minimal disturbance.
2. Consistency of depth.
3.Efficiency and speed up 10X faster.
4.Pipe layed in a one pass operation.
5.laser guided to allow you to put a fall on the pipe work to reduce the chances of air locks.
6.Variable trench spacings to give you better heat recovery.
7.Variable trench widths.
8.Loose friable soil for better back filling in most cases saving sanding the pipe.

 

[rarajon]

Ashelton. In digging the trenches for GSHP loops how do you get on using a trencher for this at the end of a straight run and then needing to loop back along side the previous trench - ie. the loopy bit.

 

[ashelton]

As you can see from the above photos, yes it works very well.
We trench out and then lift the trencher out of the ground and dig a slip trench across to the start of the return run. Then we lower the trencher back in to the slip trench and trench back to the start.

 

[Exfarmer]

We can agree that ground source works well in suitable soil types

However air source seems to work for for and not others ( myself included)
Is there anyone out there who can honestly say, " my air source heat pump works well"
I would love to see it and would gladly buy one

 

[Mdt]

We can agree that ground source works well in suitable soil types

However air source seems to work for for and not others ( myself included)
Is there anyone out there who can honestly say, " my air source heat pump works well"
I would love to see it and would gladly buy one

Mum and dad have air source heat pump and it works well. On the east coast too.

 

[Daniel]

We can agree that ground source works well in suitable soil types

However air source seems to work for for and not others ( myself included)
Is there anyone out there who can honestly say, " my air source heat pump works well"
I would love to see it and would gladly buy one

Mine does.

We have 3 on 3 new build (2012) bungalows. They came from Earth Save Products, the bungalows are well insulated and underfloor heating and they work a treat.

The only issues have been that one of the bungalows the heat pump seems to need a new temperature sensor every year, however the part has always been under warranty, the other two are no trouble.

 

[Wombat]

We can agree that ground source works well in suitable soil types

However air source seems to work for for and not others ( myself included)
Is there anyone out there who can honestly say, " my air source heat pump works well"
I would love to see it and would gladly buy one

Sister and her husband have an airsource pump. Seems to work fine.

 

[scholland]

We can agree that ground source works well in suitable soil types

However air source seems to work for for and not others ( myself included)
Is there anyone out there who can honestly say, " my air source heat pump works well"
I would love to see it and would gladly buy one

In laws have one on an old house with radiators and get on great with it. I can find out make if you want.