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#16
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Going Green
atec 7 7" "atec 77 wrote:
As an example of waste air conditioning we looked at the cost and decided no installing instead an idea I saw on one of the English programs about house refurbishment Pumping air through buried pipes results in very cool air for the cost of burning z very small light bulb and a tiny percentage of a/c It did involve some trenching and finding some plastic pipe being still cheaper than just the install labour cost of one split a/c over all an immensly satisfing outcome at least 4 times a year Great idea! ( 2 metres down the earth never gets above 5 Deg C) in Brisbane I find that impossible to believe as the air temperature would hardly ever or never get below that. Otherwise you are telling me there is a BIG heat sink buried under the city because if the soil is being heated by air at 15-35C from above that heat would have to go somewhere if the subsoil is at 5C. Sorry the physics makes no sense. Perhaps it's a typo? David |
#17
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Going Green
I had a 1KW installation put in at the end of May (got the gov's full $8K rebate); it was another three months
before the new meter was installed (they were supposed to let me know when that would happen but the fellow just turned up and it was lucky I was home.) The installer forgot to read the old meter before he took it out, said he would have to 'hook it up again' - and I got a huge bill within three weeks; I don't know how accurate the reading was He nearly electrocuted himself installing the new meter; he forgot to turn off the new installation....he said it was the first one he'd done! I hadn't noticed the meter going backwards since the original installation so (cynically) suppose the supplier got whatever was generated for nothing. The regular meter reader came round a week or so later and had no idea how to read the new meter - I anticipate (but not am not counting on) any savings showing up in the next bill. Even on a dull day, power seems to be generated, so I am hopeful. I'm trying to do the right thing... -- Anne Chambers South Australia anne dot chambers at bigpond dot comJock wrote: I have a solar hot water thingo - it's good. I am waiting for Kevin07 to spring the $8k approval then we have a solar 1kW installation. I am OK with spending my tax dollars on my day to days in this way. Just ****es me when by the end of it all, there will be those with solar stuff and those with no solar - purely because they cannot afford to shell out a baby bonus or two in a good way or that as you mention - they have no say due to being a tenant. |
#18
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Going Green
Cripes! Dodgy sounding installer you had. Thanks - I will read my meters
before the installation - phonecam photos are the go. I hope it works well for you, I am looking fwd to saving a bit on power bills here with the solar HWS & 1kW leccie systems. Would it be worth you contacting the installation company and asking them to check the thing is working as it should? - sounds really sus. Jock "Anne Chambers" wrote in message ... :I had a 1KW installation put in at the end of May (got the gov's full $8K rebate); it was another three months : before the new meter was installed (they were supposed to let me know when that would happen but the fellow : just turned up and it was lucky I was home.) The installer forgot to read the old meter before he took it : out, said he would have to 'hook it up again' - and I got a huge bill within three weeks; I don't know how : accurate the reading was He nearly electrocuted himself installing the new meter; he forgot to turn off : the new installation....he said it was the first one he'd done! I hadn't noticed the meter going backwards : since the original installation so (cynically) suppose the supplier got whatever was generated for nothing. : : The regular meter reader came round a week or so later and had no idea how to read the new meter - I : anticipate (but not am not counting on) any savings showing up in the next bill. Even on a dull day, power : seems to be generated, so I am hopeful. : : I'm trying to do the right thing... : : -- : Anne Chambers : South Australia : |
#19
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Going Green
On Wed, 23 Sep 2009 18:44:47 +1000, atec 7 7 wrote:
( 2 metres down the earth never gets above 5 Deg C) in Brisbane How and where did you do the trenching. The only trencher I can hire is only 3' |
#20
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Going Green
David Hare-Scott wrote:
atec 7 7" "atec 77 wrote: As an example of waste air conditioning we looked at the cost and decided no installing instead an idea I saw on one of the English programs about house refurbishment Pumping air through buried pipes results in very cool air for the cost of burning z very small light bulb and a tiny percentage of a/c It did involve some trenching and finding some plastic pipe being still cheaper than just the install labour cost of one split a/c over all an immensly satisfing outcome at least 4 times a year Great idea! ( 2 metres down the earth never gets above 5 Deg C) in Brisbane I find that impossible to believe as the air temperature would hardly ever or never get below that. the physics is easy ] now go try it Otherwise you are telling me there is a BIG heat sink buried under the city because if the soil is being heated by air at 15-35C from above that heat would have to go somewhere if the subsoil is at 5C. Sorry the physics makes no sense. Perhaps it's a typo? no go try it David |
#21
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Going Green
terryc wrote:
On Wed, 23 Sep 2009 18:44:47 +1000, atec 7 7 wrote: ( 2 metres down the earth never gets above 5 Deg C) in Brisbane How and where did you do the trenching. The only trencher I can hire is only 3' used neighbours back hoe then a shovel bloody hard work and near killed me |
#22
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Going Green
atec 7 7" "atec 77 wrote:
David Hare-Scott wrote: atec 7 7" "atec 77 wrote: As an example of waste air conditioning we looked at the cost and decided no installing instead an idea I saw on one of the English programs about house refurbishment Pumping air through buried pipes results in very cool air for the cost of burning z very small light bulb and a tiny percentage of a/c It did involve some trenching and finding some plastic pipe being still cheaper than just the install labour cost of one split a/c over all an immensly satisfing outcome at least 4 times a year Great idea! ( 2 metres down the earth never gets above 5 Deg C) in Brisbane I find that impossible to believe as the air temperature would hardly ever or never get below that. the physics is easy ] now go try it I take you are saying this is not a mistake. So please explain the physics. How can the subsoil be maintained well below the average annual temperature? David |
#23
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Going Green
On Thu, 24 Sep 2009 08:39:54 +1000, David Hare-Scott wrote:
I take you are saying this is not a mistake. So please explain the physics. How can the subsoil be maintained well below the average annual temperature? I think the temp is 15 deg celcius. and to answer your question; evaporative cooling {:-). Water moisuture evaporating? yes, you are allowed to say bullshit David |
#24
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Going Green
terryc wrote:
On Thu, 24 Sep 2009 08:39:54 +1000, David Hare-Scott wrote: I take you are saying this is not a mistake. So please explain the physics. How can the subsoil be maintained well below the average annual temperature? I think the temp is 15 deg celcius. and to answer your question; evaporative cooling {:-). Water moisuture evaporating? yes, you are allowed to say bullshit David I just cheked the probe down 3 metres currently 8c but it was much lower last week might hit 15 in the summer as its the first season I dont know |
#25
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Going Green
"atec 7 7" "atec wrote in message ... terryc wrote: On Wed, 23 Sep 2009 18:44:47 +1000, atec 7 7 wrote: ( 2 metres down the earth never gets above 5 Deg C) in Brisbane How and where did you do the trenching. The only trencher I can hire is only 3' used neighbours back hoe then a shovel bloody hard work and near killed me How many metres of pipe and what diameter would be necessary for this to be effective? Or do you have a link that I could explore more? Mike |
#26
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Going Green
On Sat, 26 Sep 2009 10:23:36 +0800, Bloke Down The Pub wrote:
"atec 7 7" "atec wrote in message ... terryc wrote: On Wed, 23 Sep 2009 18:44:47 +1000, atec 7 7 wrote: ( 2 metres down the earth never gets above 5 Deg C) in Brisbane How and where did you do the trenching. The only trencher I can hire is only 3' used neighbours back hoe then a shovel bloody hard work and near killed me How many metres of pipe and what diameter would be necessary for this to be effective? Or do you have a link that I could explore more? It really is a case of how much cooling you want? Volume of house to cool? How fast do you want to cool it? What is your annual soil temperature profile? (sets max cooling possible) How deep can you afford to dig and lay the pipe? The deeper the better the cooling effect What size pipe can you afford/obtain? Generally the bigger the better (think surface area for heat exchange). Everything I've seen has been plastic pipe (long term cleanliness) with a slow fan into a sealed house. This system isn't about air-con cooling effect. There probably are a lot of other things you might need to do before hand to improve the air tightness of your house. Your cheapest experiment would be to hire a walk behind trencher, then do a big loop trench from one side of your house out and long the side and back fences and back to the other side. Lay 90mm plastic poly pipe in it. Ideally your intake end is under your house (pier construction) or in a shaded (southerly side) area. Make sure you have good insect screening on the intake. I do not know if it matters if you push or pull the air. Bring to a vent high in the main room. |
#27
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Going Green
terryc wrote:
On Sat, 26 Sep 2009 10:23:36 +0800, Bloke Down The Pub wrote: "atec 7 7" "atec wrote in message ... terryc wrote: On Wed, 23 Sep 2009 18:44:47 +1000, atec 7 7 wrote: ( 2 metres down the earth never gets above 5 Deg C) in Brisbane How and where did you do the trenching. The only trencher I can hire is only 3' used neighbours back hoe then a shovel bloody hard work and near killed me How many metres of pipe and what diameter would be necessary for this to be effective? Or do you have a link that I could explore more? It really is a case of how much cooling you want? Volume of house to cool? How fast do you want to cool it? What is your annual soil temperature profile? (sets max cooling possible) How deep can you afford to dig and lay the pipe? The deeper the better the cooling effect What size pipe can you afford/obtain? Generally the bigger the better (think surface area for heat exchange). Everything I've seen has been plastic pipe (long term cleanliness) with a slow fan into a sealed house. This system isn't about air-con cooling effect. There probably are a lot of other things you might need to do before hand to improve the air tightness of your house. Your cheapest experiment would be to hire a walk behind trencher, then do a big loop trench from one side of your house out and long the side and back fences and back to the other side. Lay 90mm plastic poly pipe in it. Ideally your intake end is under your house (pier construction) or in a shaded (southerly side) area. Make sure you have good insect screening on the intake. I do not know if it matters if you push or pull the air. Bring to a vent high in the main room. Pretty much covers it , a friend an a/c guy and electrician worked the specs for us runs down around and back in the rear yard , quite a good distamce with the house well insulated and sealed its comfortable and very cheap He ran across a site in the UK which talks about it by googling |
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