Hello everyone!
A friend introduced me to an interesting heating technology today! Since we have a high groundwater level in our town (where I will be building my house next year – land already owned), his brother built his house using this exact heating method about five years ago. It works at a depth of around 7 meters (23 feet) with an average temperature of 15°C (59°F)! Until now, I was only familiar with deep drilling (70–100 meters / 230–330 feet) and surface collectors, but I had never heard or read about a system that uses groundwater until now. Why is that? Is it unprofitable (cost-benefit compared to other heating technologies), too expensive, or just not well known? At first glance, it sounds very interesting for me and my 400 m² (4,300 ft²) plot! What do you know about this heating technology?
Hello!
A friend introduced me to an interesting heating technology today! Since we have a high groundwater level in our town (where I will be building my house next year – land already owned), his brother built his house using this exact heating method about five years ago. It works at a depth of around 7 meters (23 feet) with an average temperature of 15°C (59°F)! Until now, I was only familiar with deep drilling (70–100 meters / 230–330 feet) and surface collectors, but I had never heard or read about a system that uses groundwater until now. Why is that? Is it unprofitable (cost-benefit compared to other heating technologies), too expensive, or just not well known? At first glance, it sounds very interesting for me and my 400 m² (4,300 ft²) plot! What do you know about this heating technology?
Hello!
Our heating engineer also features the system on his website.
Quote:
Water is drawn from a suction well by a feed pump and supplied to the house heating system (domestic hot water, comfort underfloor heating) through the heat pump, then returned in a cooled state to the reinjection well.
Quote:
Water is drawn from a suction well by a feed pump and supplied to the house heating system (domestic hot water, comfort underfloor heating) through the heat pump, then returned in a cooled state to the reinjection well.
S
Sebastian7919 Sep 2015 08:23Exactly, driven and suction wells. However, you need a special permit / building permit for them, and the system is not cheap.
Additionally, the wells can silt up – so you’re not buying a hassle-free package, even though they are very efficient.
Additionally, the wells can silt up – so you’re not buying a hassle-free package, even though they are very efficient.
BeHaElJa schrieb:
They probably won’t allow that. And if they do, it will require regular proof that you’re not contaminating the groundwater... plus the costs.What kind of nonsense is that? Seriously, if you don’t know, please just stay quiet.
Groundwater heat pumps are common; I have one myself and am very satisfied. There is no contamination, and I don’t need to provide any proof. The only requirement is approval from the mining authority, which the well driller handles.
Two wells are drilled—at my place, 4–12 meters (13–39 feet) deep—one is a suction well, the other a discharge well. Water is drawn in, energy is extracted through a heat exchanger to power the heat pump. Instead of air, only water is used here, which then flows back into the well.
Presumably, BeHaElJa was referring to drinking water. Of course, this is not allowed; drilling is only permitted down to the first impermeable layer.
Whether this is feasible for your property needs to be clarified with a contracting company. They will review the groundwater plans (groundwater level and flow direction) and conduct test drillings with pumping trials to determine if it is worthwhile for you.
Whether this is feasible for your property needs to be clarified with a contracting company. They will review the groundwater plans (groundwater level and flow direction) and conduct test drillings with pumping trials to determine if it is worthwhile for you.
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