Reduction of environmental impacts of heat pump usage with special regard on systems with borehole heat exchangers
Ground coupled heat pump systems are suitable for extracting subsurface thermal energy with low environmental impact especially regarding CO2 emission. The efficiency of such systems strongly depends on the temperature of the ambient heat (thus underground substrate). This temperature usually ch...
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| Format: | Article |
| Language: | English |
| Published: |
University of Debrecen
2014-12-01
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| Series: | Acta Geographica Debrecina: Landscape and Environment Series |
| Subjects: | |
| Online Access: | http://landscape.geo.klte.hu/pdf/agd/2014/2014v8is2_3.pdf |
| Summary: | Ground coupled heat pump systems are suitable for extracting subsurface thermal energy with low environmental
impact especially regarding CO2
emission. The efficiency of such systems strongly depends
on the temperature of the ambient heat (thus underground substrate). This temperature usually changes
unfavourably during operation and efficiency becomes lower than the nominal value. Appropriate installation
and operation cause lower temperature drop, thus higher efficiency. Consequently, it means lower
electricity demand, therefore lower specific CO2
emission, more CO2
saving and lower operation costs.
Quantitative analysis with 21 heat extraction models presented in the paper points out that the differences
could be significant (up to 30 %), in addition using bivalent mode the environmental impact of the
installation or/and operation can be reduced as well, especially using biomass firing as auxiliary heating. |
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| ISSN: | 1789-4921 1789-7556 |