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Exergy analysis and operational efficiency of a horizontal ground-source heat pump system operated in a low-energy test house under simulated occupancy conditions.

Author(s) : ALLY M. R., MUNK J. D., BAXTER V. D., et al.

Type of article: Article, IJR article

Summary

This paper presents data, analyses, measures of performance, and conclusions for a ground-source heat pump (GSHP) providing space conditioning to a 345 m2 house whose envelope is made of structural insulated panels. The entire house thermal load with RSI-3.7 (RUS-21) walls, triple-pane windows (U-factor of 1.64 W m-2 K (0.29 Btu h/ft2.°F)) and solar heat gain coefficient of 0.25, a roof assembly with overall thermal resistance of about RSI-8.8 (RUS-50), and low leakage rates of 0.74 ACH at 50 Pa, was satisfied with a 2.16 ton (7.56 kW) GSHP unit. Coefficient of performance is calculated on the basis of the total power input (including duct, ground loop, and control power losses). Exergy analysis provides a true measure of how closely actual performance approaches the ideal, and it unequivocally identifies, better than energy analysis does, the sources and causes of lost work — the root cause of system inefficiencies and wasted energy.

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Pages: 1092-1103

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Details

  • Original title: Exergy analysis and operational efficiency of a horizontal ground-source heat pump system operated in a low-energy test house under simulated occupancy conditions.
  • Record ID : 30004202
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 4
  • Publication date: 2012/06

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