Sniffie
2017-04-02 10:45:50
- #1
Hello everyone,
the construction of our single-family house near Trier is supposed to start next week (188m², Kfw55 with 36.5 KLB stones, without WDVS, 6.5KW calculated heating load). So far, a brine heat pump from Viessmann was planned.
On Friday we received information that the soil in our area has a high CO2 content due to a mineral spring. We received the following statement from the deep driller:
"In the local area there is a mineral spring which has a high CO2 content. With CO2 it is possible that it diffuses into the probes and enriches the brine liquid, which leads to high pressures that escape in the basement (pressure relief valve) or cause the system to foam. Worse would be a permanent degassing into the basement, which can lead to toxic fumes there."
We have since looked for alternatives (air-water heat pump, trench collectors, etc...) and asked around with the neighbors. It is actually the case that for several homeowners the CO2 has to be released from the heat pump at certain intervals (statements range from every 4 weeks to twice a year). In addition, the systems are said to have a shorter lifespan because of this.
We have now heard that there are also diffusion-tight pipes that can circumvent the problem? Waterkotte is said to have, among other things, "open" heating systems available, which would also work (whatever that means...). I have also seen geothermal heat pumps on the internet that use CO2 as a heat transfer medium instead of brine?
Do you have any ideas or experience with what could be done? We would only switch to an air-water heat pump if there is no alternative.
I would be grateful for any response!
Best regards,
Marcel
the construction of our single-family house near Trier is supposed to start next week (188m², Kfw55 with 36.5 KLB stones, without WDVS, 6.5KW calculated heating load). So far, a brine heat pump from Viessmann was planned.
On Friday we received information that the soil in our area has a high CO2 content due to a mineral spring. We received the following statement from the deep driller:
"In the local area there is a mineral spring which has a high CO2 content. With CO2 it is possible that it diffuses into the probes and enriches the brine liquid, which leads to high pressures that escape in the basement (pressure relief valve) or cause the system to foam. Worse would be a permanent degassing into the basement, which can lead to toxic fumes there."
We have since looked for alternatives (air-water heat pump, trench collectors, etc...) and asked around with the neighbors. It is actually the case that for several homeowners the CO2 has to be released from the heat pump at certain intervals (statements range from every 4 weeks to twice a year). In addition, the systems are said to have a shorter lifespan because of this.
We have now heard that there are also diffusion-tight pipes that can circumvent the problem? Waterkotte is said to have, among other things, "open" heating systems available, which would also work (whatever that means...). I have also seen geothermal heat pumps on the internet that use CO2 as a heat transfer medium instead of brine?
Do you have any ideas or experience with what could be done? We would only switch to an air-water heat pump if there is no alternative.
I would be grateful for any response!
Best regards,
Marcel