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A field measurement of the utilizing geothermal and external insulated house in winter season with energy and exergy analysis.

Number: 808

Author(s) : SAKATA T., SAITO M., KIKUTA K., et al.

Summary

The house standing in Otaru City, Hokkaido, has built with an external insulation and a Ground Source Heat Pump (GSHP), and we measured the indoor thermal environment and the use of electric power into the GSHP in winter season. Based upon the results of the measurement, energy and exergy flows from underground soil to the outdoor air via the GSHP, the indoor air and building envelopes were numerically analyzed. First, the indoor air temperature has been kept from 18 to 21?. Second, the heat loss coefficient of the measurement has been 1.0W/m2*K. Third, the GSHP has efficiently operated with the average System Coefficient of Performance (SCOP) of 4.5. Fourth, in the lowest daily mean outdoor air temperature (-9.3?), the GSHP consumed 30% of input thermal exergy of underground soil and electric exergy, so that supplied 70% of thermal exergy into the indoor air. Finally, we analyzed and simulated three cases of the exergy consumption processes from the power plant to the outdoor air through the GSHP, the indoor air and building envelopes. As a consequence, in the lowest daily mean outdoor air temperature, to keep the mean indoor air temperature at 19.6?, 60% of exergy was consumed between the power plant and the GSHP, and the rest, 40% of exergy was consumed inside the GSHP, the indoor air and building envelopes.

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Pages: 10 p.

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Details

  • Original title: A field measurement of the utilizing geothermal and external insulated house in winter season with energy and exergy analysis.
  • Record ID : 30009946
  • Languages: English
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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