Studies of a Heat Pump Using Water and Air Heat Sources in a Series. Performance in Cooling Operation.

定祐, 伊藤; 靖, 高野; 直勝, 三浦; 靖夫, 内川

doi:10.1299/kikaib.67.2089

Cited by 1 publication

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“…Ito et al [30] demonstrated that the compressor of the water source heat pump (WSHP) consumes electricity equivalent to that of the ASHP when the HP inlet temperature is 10 • C higher than the ambient temperature. In an actual case, the heat sink temperature difference at which the performances of the GSHP and ASHP are equal becomes less than 10 • C, because the circulation pump consumes electricity.…”

Section: Performance Analysis Of the Heat Source Temperaturementioning

confidence: 99%

A Study on the Operational Condition of a Ground Source Heat Pump in Bangkok Based on a Field Experiment and Simulation

et al. 2020

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The deployment of highly efficient cooling equipment is expected to promote energy savings and greenhouse gas emissions reductions in the tropics. A ground source heat pump (GSHP) has high energy-savings potential for use in Bangkok, Thailand. This study aimed to elucidate the operational conditions of a GSHP when used in Bangkok which was expected to achieve a higher efficiency than an air source heat pump (ASHP) over the long term. An operational experiment on a pilot facility in Bangkok and a simulation over a three-year GSHP operation were conducted. As a result of the operational experiment and simulation, the proposed operational condition was that the 90th percentile value of the hourly heat pump (HP) inlet temperature did not exceed 5 °C above that of the hourly annual ambient temperature during the third year of operation. When a GSHP designed based on this condition was utilized for a small government building, the required number of boreholes were 24, 4, and 3 for air-conditioned areas of 200, 40, and 25 m2, respectively, which achieved 40% energy savings. Thus, a small-scale GSHP in Bangkok designed based on the proposed condition can achieve high efficiency within space limitations.

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Section: Performance Analysis Of the Heat Source Temperaturementioning

confidence: 99%