A new ground-coupled heat pump system integrated with a multi-mode air-source heat compensator to eliminate thermal imbalance in cold regions

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Tian You
  • Wenxing Shi
  • Baolong Wang
  • Wei Wu
  • Xianting Li

Detail(s)

Original languageEnglish
Pages (from-to)103-112
Journal / PublicationEnergy and Buildings
Volume107
Online published4 Aug 2015
Publication statusPublished - 15 Nov 2015
Externally publishedYes

Abstract

A ground-coupled heat pump (GCHP) is a clean and energy-saving approach to providing air conditioning and domestic hot water. For buildings with a dominant heating load, more heat is extracted from the soil and thermal imbalance becomes a crucial problem, in turn reducing efficiency and impeding the wide application of GCHP. Due to the disadvantages of the existing solutions, a multi-mode air-source heat compensator (AHC) integrated with a GCHP system to make a hybrid AHC-GCHP system is proposed in this paper. The principles and operating strategy of AHC-GCHP are illustrated in detail and its performance is simulated in the transient system simulation tool TRNSYS. AHC can not only compensate heat into the ground but also supply heat for space heating and domestic hot water in different modes through full use of the energy in the air with the average coefficient of performance (COP) ranging from 4.49 to 15.09. The AHC-GCHP system effectively keeps the soil thermal balance, and saves 23.86% energy compared with a traditional "boiler + split air conditioner" system, and costs less than half as much as a "hybrid GCHP assisted with solar collector" system. Consequently, the AHC-GCHP system is a potentially efficient and economic approach for buildings in cold regions.

Research Area(s)

  • Ground-coupled heat pump, Soil thermal imbalance, Air source, Cold region, Multi-mode

Citation Format(s)