Hello,
here I would like to share some experiences and data regarding my brine heat pump and deep drilling, based in part on the expert’s "questionnaire":
a) What is the soil composition on your property?
Up to 3m (10 feet) silty, fine sandy, clayey soil
Up to 4m (13 feet) slope debris, rock fragments
Then bedrock (mainly limestone)
b) How deep was the drilling?
Drilled twice to a depth of 72m (236 feet)
c) How much did the drilling cost?
€10,400 including double U-probes DN25
Grouting material with 2.0 W/mK thermal conductivity
Permitting process (building permit / planning permission)
Pressure-tight house entry at the basement and underground routing of supply lines (about 25m (82 feet))
Filling/draining equipment, filling, pressure testing, etc. (all inclusive)
d) How much did the system cost?
System: Tecalor TTc 05 with heating output at B0/W35 of 5.8 kW and coefficient of performance (COP) of 4.8
Cost: €9,800
e) Were there any difficulties during installation, if so, what kind?
Because the water used to flush out the drilled material during drilling seeped away, a "small compressor" was needed to blow it out with air. However, it had to be placed on a neighbor’s property who had not yet started building. The machine was the size and approximate weight of a 20-ton truck but was off-road capable. This caused a 2-day delay because the compressor first had to be transported to our site. No additional costs were charged.
f) How is the daily operation?
"Like a refrigerator." Once the parameters on the heating system are correctly set, the only thing that should be done is occasionally reading the information/data such as operating hours and source temperature. Otherwise, it runs "on its own," just like any heating system. When the door is closed, the unit is virtually inaudible. Very discreet since, apart from the cabinet in the utility room, nothing else is visible (all brine pipes are underground).
e) What are the operating costs for which living area?
Currently, a living area of 180sqm (1937 sqft) is heated, plus an additional 65sqm (700 sqft) of cellar space within the insulated thermal envelope (these rooms are around 15-16°C (59-61°F) on the coldest days). From September 2014 to September 2015, 2,000 kWh of electricity was consumed for heating and hot water (2 adults, 1 baby, 1 toddler). The house is a KfW-70 standard building according to the 2009 energy saving regulations, which already met the required technical standards before the central ventilation system with enthalpy heat exchanger was installed (we decided to add this after the initial applications).
f) to be continued ....
Note regarding the comparison of the coefficient of performance (COP):
Since optimizing the heating curve and settings at the end of last year, the system has had a COP of about 5.5. Operating hours are around 1200; the deep borehole was drilled approximately 20% deeper than initially recommended by the companies, at our own request.
here I would like to share some experiences and data regarding my brine heat pump and deep drilling, based in part on the expert’s "questionnaire":
a) What is the soil composition on your property?
Up to 3m (10 feet) silty, fine sandy, clayey soil
Up to 4m (13 feet) slope debris, rock fragments
Then bedrock (mainly limestone)
b) How deep was the drilling?
Drilled twice to a depth of 72m (236 feet)
c) How much did the drilling cost?
€10,400 including double U-probes DN25
Grouting material with 2.0 W/mK thermal conductivity
Permitting process (building permit / planning permission)
Pressure-tight house entry at the basement and underground routing of supply lines (about 25m (82 feet))
Filling/draining equipment, filling, pressure testing, etc. (all inclusive)
d) How much did the system cost?
System: Tecalor TTc 05 with heating output at B0/W35 of 5.8 kW and coefficient of performance (COP) of 4.8
Cost: €9,800
e) Were there any difficulties during installation, if so, what kind?
Because the water used to flush out the drilled material during drilling seeped away, a "small compressor" was needed to blow it out with air. However, it had to be placed on a neighbor’s property who had not yet started building. The machine was the size and approximate weight of a 20-ton truck but was off-road capable. This caused a 2-day delay because the compressor first had to be transported to our site. No additional costs were charged.
f) How is the daily operation?
"Like a refrigerator." Once the parameters on the heating system are correctly set, the only thing that should be done is occasionally reading the information/data such as operating hours and source temperature. Otherwise, it runs "on its own," just like any heating system. When the door is closed, the unit is virtually inaudible. Very discreet since, apart from the cabinet in the utility room, nothing else is visible (all brine pipes are underground).
e) What are the operating costs for which living area?
Currently, a living area of 180sqm (1937 sqft) is heated, plus an additional 65sqm (700 sqft) of cellar space within the insulated thermal envelope (these rooms are around 15-16°C (59-61°F) on the coldest days). From September 2014 to September 2015, 2,000 kWh of electricity was consumed for heating and hot water (2 adults, 1 baby, 1 toddler). The house is a KfW-70 standard building according to the 2009 energy saving regulations, which already met the required technical standards before the central ventilation system with enthalpy heat exchanger was installed (we decided to add this after the initial applications).
f) to be continued ....
Note regarding the comparison of the coefficient of performance (COP):
Since optimizing the heating curve and settings at the end of last year, the system has had a COP of about 5.5. Operating hours are around 1200; the deep borehole was drilled approximately 20% deeper than initially recommended by the companies, at our own request.
T
toxicmolotof31 Jul 2016 22:06July
4 people, 125 sqm (1345 sq ft) living space, KFW55 energy saving ordinance 2014
Heating + water combined: 59 kWh (of which 59 kWh from photovoltaic)
4 people, 125 sqm (1345 sq ft) living space, KFW55 energy saving ordinance 2014
Heating + water combined: 59 kWh (of which 59 kWh from photovoltaic)
Good morning,
can someone here tell me what kind of funding is currently available in total for a ground source heat pump? I find it somewhat unclear from which sources you can receive money – that’s why I’m asking directly for specific numbers – for North Rhine-Westphalia (NRW).
Our municipal utility company is also providing an additional 750 EUR.
Best regards & thanks!
Gatho
can someone here tell me what kind of funding is currently available in total for a ground source heat pump? I find it somewhat unclear from which sources you can receive money – that’s why I’m asking directly for specific numbers – for North Rhine-Westphalia (NRW).
Our municipal utility company is also providing an additional 750 EUR.
Best regards & thanks!
Gatho
New build or existing building? BAFA actually has a rather simple flyer on this topic.
For new builds, €4000 (about $4400) for the heating system and €500 (about $550) for the drilling – that’s my understanding and has also been the case for us.
Important: apply first, then sign the contract. Of course, also follow all other requirements.
For new builds, €4000 (about $4400) for the heating system and €500 (about $550) for the drilling – that’s my understanding and has also been the case for us.
Important: apply first, then sign the contract. Of course, also follow all other requirements.
Thanks for the quick reply, yes exactly – new build (KFW70 semi-detached house).
Our air-to-water heat pump was changed by the general contractor. However, it also has to fit financially... this wasn’t planned at all.
But heating is an important aspect of a house... so it does make you think about whether to invest in a ground source heat pump. Depending on subsidies, the cost varies.
The BAFA offers €4,000 (about $4,400) for the heating system, €500 (about $550) for the drilling, and my local utility company adds another €750 (about $820). Otherwise, the state of NRW doesn’t also offer any support, does it?
Good luck
Gatho
Our air-to-water heat pump was changed by the general contractor. However, it also has to fit financially... this wasn’t planned at all.
But heating is an important aspect of a house... so it does make you think about whether to invest in a ground source heat pump. Depending on subsidies, the cost varies.
The BAFA offers €4,000 (about $4,400) for the heating system, €500 (about $550) for the drilling, and my local utility company adds another €750 (about $820). Otherwise, the state of NRW doesn’t also offer any support, does it?
Good luck
Gatho
S
Sebastian795 Aug 2016 11:05No, but you need to submit the application before commissioning - this can sometimes be a bit more complicated with the general contractor. Make sure to clarify this as soon as possible.