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Impact of weather variation on ground-source heat pump design.

Author(s) : PERTZBORN A., NELLIS G., KLEIN S.

Type of article: Article

Summary

This article presents an investigation on the impact of year-to-year weather variability on the optimal design of a system for heating and cooling a building usign a ground-source heat pump. The designs of a boiler-ground-source heat pump hybrid and a cooling tower-ground-source heat pump hybrid were optimized using a typical meteorological year (TMY2) wheather file and also using 15 years of actual weather data. The results indicate that a design based on a TMY2 weather file may be undersized for a sever weather year; this is particularly true if the severe weather year is encountered during the first year of system operation. A cooling tower-ground-source heat pump hybrid model was developed, which includes the use of a backup boiler placed on the building side (rather than the loop side) of the system. It was found that the use of a boiler backup mitigated much of the negative impact of a severe weather year. The boiler supplied the heating during periods of particularly severe weather so that the ground loop length could be maintained at a reasonable value.

Details

  • Original title: Impact of weather variation on ground-source heat pump design.
  • Record ID : 30000813
  • Languages: English
  • Source: HVAC&R Research - vol. 17 - n. 2
  • Publication date: 2011/04
  • DOI: http://dx.doi.org/10.1080/10789669.2011.543259

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