ᐅ Controlled Residential Ventilation with Cooling: Ground Source Heat Pump Using Brine Loop Instead of Air-to-Water Heat Pump?
Created on: 3 Jan 2019 22:37
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Christian K.
Hello everyone,
So far, I assumed that cooling with a mechanical ventilation system with heat recovery is done using an additional device that can be retrofitted later. This seems to be only partially true, as it is indeed an additional device, but retrofitting it later is difficult. Or are there systems that operate purely electrically? In our case, a photovoltaic system would be available, so we could technically cool using electricity in the summer.
Cooling with a mechanical ventilation system with heat recovery is done either with an earth-to-air heat exchanger (EWT) or a ground heat exchanger (ground loop). Since we need to raise the ground level by about 1.5m (5 feet), we could save on excavation work. It would be interesting to know what a ground heat exchanger would cost. So far, I haven’t found any concrete information because frequently only ground-source heat pumps are mentioned and not ground heat exchangers for mechanical ventilation systems, or if so, usually together with excavation work.
In my research, I came up with the idea of replacing our planned air-to-water heat pump with a ground-source heat pump. After all, I would have to install a system for cooling the mechanical ventilation anyway, so I could just extend the installation somewhat and switch to a ground-source heat pump, right? Or is it not that simple, and what disadvantages would there be? The costs are, of course, also interesting here, especially considering that we wouldn’t have additional excavation work.
I wasn’t able to find clear answers to these three questions and hope someone here can provide some clarification.
Good luck, CK
So far, I assumed that cooling with a mechanical ventilation system with heat recovery is done using an additional device that can be retrofitted later. This seems to be only partially true, as it is indeed an additional device, but retrofitting it later is difficult. Or are there systems that operate purely electrically? In our case, a photovoltaic system would be available, so we could technically cool using electricity in the summer.
Cooling with a mechanical ventilation system with heat recovery is done either with an earth-to-air heat exchanger (EWT) or a ground heat exchanger (ground loop). Since we need to raise the ground level by about 1.5m (5 feet), we could save on excavation work. It would be interesting to know what a ground heat exchanger would cost. So far, I haven’t found any concrete information because frequently only ground-source heat pumps are mentioned and not ground heat exchangers for mechanical ventilation systems, or if so, usually together with excavation work.
In my research, I came up with the idea of replacing our planned air-to-water heat pump with a ground-source heat pump. After all, I would have to install a system for cooling the mechanical ventilation anyway, so I could just extend the installation somewhat and switch to a ground-source heat pump, right? Or is it not that simple, and what disadvantages would there be? The costs are, of course, also interesting here, especially considering that we wouldn’t have additional excavation work.
I wasn’t able to find clear answers to these three questions and hope someone here can provide some clarification.
Good luck, CK
C
Christian K.30 Jan 2019 09:20We want glued hardwood flooring, and if done properly, condensation would not be an issue. However, we do not want a cold floor. We specifically choose hardwood flooring because we want a warm floor, so that would be contradictory.
Christian K. schrieb:
We want glued hardwood flooring, and if done properly, condensation wouldn't be an issue, but... we don’t want a cold floor. We specifically choose hardwood because we want a warm floor, so that would be contradictory. In a newly built house constructed according to current standards, you’ll have to use slippers anyway... When it’s +5°C (41°F) outside, we have 23°C (73°F) supply temperature and 21°C (70°F) room temperature... You won’t have warm feet on either tiles or laminate under those conditions.
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Christian K.30 Jan 2019 12:33fragg schrieb:
In a newly built house constructed according to current technical standards, you will need slippers anyway... With an outside temperature of +5 degrees Celsius (41°F), we have a supply temperature of 23 degrees Celsius (73°F) and an indoor temperature of 21 degrees Celsius (70°F)... Your feet don’t feel warm on either tiles or laminate flooring. Do you have a concrete core activation system, or how do you achieve the 23 degrees Celsius (73°F) supply temperature?
But as I said, laminate and tiles are naturally colder than hardwood flooring. My sister has hardwood in the living room and tiles in the kitchen. The difference is significant. On the hardwood, you can comfortably walk barefoot, while in the kitchen you put slippers on after a while.
Lumpi_LE schrieb:
That’s why cooling circuits are also installed in the ceiling if you have a reinforced concrete slab; otherwise, it’s a bit more complicated. We would have, but the budget will probably not cover it.
Christian K. schrieb:
Do you have concrete core activation, or how do you achieve the 23 degrees Celsius (73°F) supply temperature? This is just a snapshot. The 23 degrees Celsius (73°F) is not maintained consistently and it’s not rocket science to reach that temperature even without concrete core activation. For example, I have similar temperatures.
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