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Farm Building and Infrastructure
Renewable Energy
ground source vs air souce for new build
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<blockquote data-quote="Dave645" data-source="post: 7412835" data-attributes="member: 55822"><p>GSHP are happiest producing heated water at relatively low temperatures, and the lower the temp difference between the incoming water temp and the required the better, that said they happily push water down to below freezing.</p><p>They are differential machines taking heat out of water that’s at minus 1 is still possible you just make it minus 5 you still draw 4c of heat out. It’s just the efficiency of doing it that drops.</p><p></p><p>if anyone out there has suffered a frozen ground loop ( undersized loop) as in you have pushed the incoming waters to below freezing then it may pay to add a thermal buffer, for when the air temps rise above the ground loop, this can be as simple as an old combine radiator, that sits in the sun sat in a mini glass house, you move the water from the loop around the radiator it picks up the suns heat and or air temps and put them into your ground loop as it’s imperative you unfreeze your ground loop as fast as possible, as sub zero temps in the ground loop freeze ground water and stop the ground warming ups fast as it could with water moving through the ground.</p><p>This can also be done with solar hot water panels. And a mini pump loop that can pump water around your ground loop when the solar water panels are producing warm water. Your looking for any way to add heat into the loop that is free, a radiator is basically a high efficiency air to water heat exchanger. Even drawing water in from the loop into the heat pump through the radiator allows the radiator to pull warm airs heat into the cold water.</p><p> You could design a bypass to allow you to control when or if the radiator was used in the intake side of the heat pump water circulation system.</p></blockquote><p></p>
[QUOTE="Dave645, post: 7412835, member: 55822"] GSHP are happiest producing heated water at relatively low temperatures, and the lower the temp difference between the incoming water temp and the required the better, that said they happily push water down to below freezing. They are differential machines taking heat out of water that’s at minus 1 is still possible you just make it minus 5 you still draw 4c of heat out. It’s just the efficiency of doing it that drops. if anyone out there has suffered a frozen ground loop ( undersized loop) as in you have pushed the incoming waters to below freezing then it may pay to add a thermal buffer, for when the air temps rise above the ground loop, this can be as simple as an old combine radiator, that sits in the sun sat in a mini glass house, you move the water from the loop around the radiator it picks up the suns heat and or air temps and put them into your ground loop as it’s imperative you unfreeze your ground loop as fast as possible, as sub zero temps in the ground loop freeze ground water and stop the ground warming ups fast as it could with water moving through the ground. This can also be done with solar hot water panels. And a mini pump loop that can pump water around your ground loop when the solar water panels are producing warm water. Your looking for any way to add heat into the loop that is free, a radiator is basically a high efficiency air to water heat exchanger. Even drawing water in from the loop into the heat pump through the radiator allows the radiator to pull warm airs heat into the cold water. You could design a bypass to allow you to control when or if the radiator was used in the intake side of the heat pump water circulation system. [/QUOTE]
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ground source vs air souce for new build
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