Details
| Original language | English |
|---|---|
| Article number | 012106 |
| Number of pages | 6 |
| Journal | Journal of Physics: Conference Series |
| Volume | 2766 |
| Publication status | Published - 2024 |
| Event | 9th European Thermal Sciences Conference, EUROTHERM 2024 - Bled, Slovenia Duration: 10 Jun 2024 → 13 Jun 2024 |
Abstract
This paper examines a 368 m deep geothermal probe for heating an existing building. The geothermal probe based on the thermosyphon principle works with CO2. The working fluid evaporates and condenses in the probe so that no pump is required for transportation. The geothermal probe has an output of up to 22 kW at an underground temperature of up to 18°C. The demand-controlled use of the geothermal probe was investigated and the installed heat pump was optimized for its use. The average COP of the last heating season was between 2,3 and 4,6. For the second heating season the temperature of the soil around the probe is also measured via a distributed temperature sensing system, that covers the whole depth of the probe. It has been shown that the ground temperature only cools down to a certain point and does not fall below this point after a short regeneration period. It was shown that the heat pump with geothermal probe operates at constant temperatures at the evaporator compared to air heat pumps, even at cold outside temperatures.
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In: Journal of Physics: Conference Series, Vol. 2766, 012106, 2024.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Investigation of the operating characteristic of a demand-controlled 368 m deep CO2thermosyphon geothermal borehole heat exchanger for building heating
AU - Hagedorn, Janina
AU - Kahlfeld, Robin
AU - Nageler, Malte
AU - Kabelac, Stephan
N1 - Publisher Copyright: © Published under licence by IOP Publishing Ltd.
PY - 2024
Y1 - 2024
N2 - This paper examines a 368 m deep geothermal probe for heating an existing building. The geothermal probe based on the thermosyphon principle works with CO2. The working fluid evaporates and condenses in the probe so that no pump is required for transportation. The geothermal probe has an output of up to 22 kW at an underground temperature of up to 18°C. The demand-controlled use of the geothermal probe was investigated and the installed heat pump was optimized for its use. The average COP of the last heating season was between 2,3 and 4,6. For the second heating season the temperature of the soil around the probe is also measured via a distributed temperature sensing system, that covers the whole depth of the probe. It has been shown that the ground temperature only cools down to a certain point and does not fall below this point after a short regeneration period. It was shown that the heat pump with geothermal probe operates at constant temperatures at the evaporator compared to air heat pumps, even at cold outside temperatures.
AB - This paper examines a 368 m deep geothermal probe for heating an existing building. The geothermal probe based on the thermosyphon principle works with CO2. The working fluid evaporates and condenses in the probe so that no pump is required for transportation. The geothermal probe has an output of up to 22 kW at an underground temperature of up to 18°C. The demand-controlled use of the geothermal probe was investigated and the installed heat pump was optimized for its use. The average COP of the last heating season was between 2,3 and 4,6. For the second heating season the temperature of the soil around the probe is also measured via a distributed temperature sensing system, that covers the whole depth of the probe. It has been shown that the ground temperature only cools down to a certain point and does not fall below this point after a short regeneration period. It was shown that the heat pump with geothermal probe operates at constant temperatures at the evaporator compared to air heat pumps, even at cold outside temperatures.
UR - http://www.scopus.com/inward/record.url?scp=85195550967&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/2766/1/012106
DO - 10.1088/1742-6596/2766/1/012106
M3 - Conference article
AN - SCOPUS:85195550967
VL - 2766
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012106
T2 - 9th European Thermal Sciences Conference, EUROTHERM 2024
Y2 - 10 June 2024 through 13 June 2024
ER -