New Bungalow

renewablejohn · Nov 18, 2019

KB6930 said:
I'm guessing a slow running stream ?

Not necessarily I have seen it done with quite a fast flowing river. A tank embedded in the side of the river with the pipes coiled inside tank allowing the water to go through. They did make it so that the coils could be lifted to flush any silt out with a high pressure hose.

Also important to remember the Environment Agency will take its pound of flesh out of any scheme for doing nothing.

https://www.gshp.org.uk/pdf/GSHPA_letter_to_EA09102018.pdf

Mur Huwcun · Nov 18, 2019

We quickly looked into using the stream we have running through the garden but although possible it was going to a nightmare to get EA and NRW and everyone else to agree to us using it plus there’s a minimum temp that you can return the water back to stream and from memory cannot harvest any more than 4???? degree from the water. RHI with the setup was also an issue according to the installers. But, it is something I’ve looked into afterwards and could be a possibility in years to come if the ground loops turn out to be extracting too much.

renewablejohn · Nov 18, 2019

Mur Huwcun said:
We quickly looked into using the stream we have running through the garden but although possible it was going to a nightmare to get EA and NRW and everyone else to agree to us using it plus there’s a minimum temp that you can return the water back to stream and from memory cannot harvest any more than 4???? degree from the water. RHI with the setup was also an issue according to the installers. But, it is something I’ve looked into afterwards and could be a possibility in years to come if the ground loops turn out to be extracting too much.

Stealth is your friend when it comes to the EA.

Highland Mule · Nov 18, 2019

Mur Huwcun said:
We quickly looked into using the stream we have running through the garden but although possible it was going to a nightmare to get EA and NRW and everyone else to agree to us using it plus there’s a minimum temp that you can return the water back to stream and from memory cannot harvest any more than 4???? degree from the water. RHI with the setup was also an issue according to the installers. But, it is something I’ve looked into afterwards and could be a possibility in years to come if the ground loops turn out to be extracting too much.

4C is quite a generous temperature change though - roughly equates to taking a 1.7kW of heat from a flow of 1 litre/second.

Mur Huwcun · Nov 18, 2019

Highland Mule said:
4C is quite a generous temperature change though - roughly equates to taking a 1.7kW of heat from a flow of 1 litre/second.

don’t quote me on the 4degree though, it could be capped lower I can’t remember what it was. So roughly I would need about 8ltrs a second of flow? I have actually tried to measure the flow with a bucket at the exit point of a 225mm twin wall pipe as I looked into a mini hydro possibility. It was over 10ltr per second as it was too difficult to hold the bucket there!!!

Highland Mule · Nov 18, 2019

Mur Huwcun said:
don’t quote me on the 4degree though, it could be capped lower I can’t remember what it was. So roughly I would need about 8ltrs a second of flow? I have actually tried to measure the flow with a bucket at the exit point of a 225mm twin wall pipe as I looked into a mini hydro possibility. It was over 10ltr per second as it was too difficult to hold the bucket there!!!

Heat capacity of water is 4,200 J/kg-C, so every kg of water will liberate 4,200 J when you take 1C out of it. If that's per second, it would be 4.2 kW - which

(hold on...) that tells me that my earlier maths was out by an order of magnitude.

1 litre per second will give 17kW of heat, based on a 4C temperature drop.

Speedstar · Nov 22, 2019

This week we have got all the block work finished to the finished floor level

Speedstar · Nov 22, 2019

This the steps in the block work in the foundations

br jones · Nov 22, 2019

Dont like lightweights in the ground ,no strength and fall apart with frost

S J H · Nov 22, 2019

br jones said:
Dont like lightweights in the ground ,no strength and fall apart with frost

I think they're trench blocks,

Mur Huwcun · Nov 22, 2019

S J H said:
I think they're trench blocks,

you can see the ends on the corners

Speedstar · Nov 22, 2019

S J H said:
I think they're trench blocks,

Yes they are trench blocks the right ones for the job

br jones · Nov 22, 2019

S J H said:
I think they're trench blocks,
Still rubbish ,still fall apart when the frost gets into them

S J H · Nov 22, 2019

Ok, better sell up before mine falls down.

Blue. · Nov 22, 2019

Speedstar said:
This week we have got all the block work finished to the finished floor level

View attachment 845207 View attachment 845208 View attachment 845211 View attachment 845213

Someone asked why you’d stoned it all up before digging the footings,one things for sure it was the right thing to do.

Pond digger · Nov 23, 2019

Grand looking site. I do like to see a new build, so thanks for posting.

br jones · Nov 23, 2019

S J H said:
Ok, better sell up before mine falls down.

All i am saying is ,he has put down that lovely thick strong concrete for strength down ,and then used soft ,compressable ,aeasily broken ,blocks which the compo doesnt stick to ,they are poor things to use underground

Speedstar · Nov 23, 2019

eulb said:
Someone asked why you’d stoned it all up before digging the footings,one things for sure it was the right thing to do.

yes it was a good idea , all nice & clean to work on , the builders do not do mud

Speedstar · Nov 23, 2019

br jones said:
All i am saying is ,he has put down that lovely thick strong concrete for strength down ,and then used soft ,compressable ,aeasily broken ,blocks which the compo doesnt stick to ,they are poor things to use underground

is that why they have to cut them with a saw as the can not break them with a hammer

spanners and hammers · Nov 23, 2019

hope you got some big windows going in you got some great views !!

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