Performance of Ground Source Absorption Heat Pump

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)Chapter in research book/monograph/textbook (Author)

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Detail(s)

Original languageEnglish
Title of host publicationAbsorption Heating Technologies
Subtitle of host publicationEfficient Heating, Heat Recovery and Renewable Energy
Place of PublicationSingapore
PublisherSpringer
Pages147-165
ISBN (Electronic)9789811504709
ISBN (Print)9789811504693, 9789811504723
Publication statusPublished - 2020

Abstract

For ground source electrical heat pump (GSEHP) systems used in heating-dominant regions, the heat extraction from the soil in winter is considerably higher than heat rejection into the soil in summer, which leads to underground thermal imbalance. Due to the limited temperature recovery ability of soil, the underground temperature will decrease year by year after long-term operations, causing heating performance deterioration of the heat pump unit. The existing solutions include borehole-level modification (increasing the spacing/depth/number of boreholes) and system-level modification (auxiliary heat source and energy storage), but have dissatisfactory effects (thermal balance, energy efficiency or cost-effectiveness). The novel ground source absorption heat pump (GSAHP) is proposed to address the problems. Compared to the conventional GSEHP, the GSAHP extracts less heat from the soil in winter and rejects more heat to the soil in summer, which can effectively reduce the underground thermal imbalance. In this manner, the auxiliary heat sources or heat complement devices can be reduced or eliminated. Long-term simulations indicate that the thermal imbalance ratio is kept close to 0 and the soil temperature is maintained stable in severely cold regions. In addition, the annual primary energy efficiency of the GSAHP can also be competitive due to the advantageous performance in the heating mode and the large heating load. Therefore, the novel GSAHP is quite suitable in severely cold regions.

Research Area(s)

  • THERMAL IMBALANCE, COMPENSATION UNIT, SYSTEM, BALANCE

Citation Format(s)

Performance of Ground Source Absorption Heat Pump. / Wu, Wei; Li, Xianting; You, Tian.

Absorption Heating Technologies: Efficient Heating, Heat Recovery and Renewable Energy. Singapore : Springer, 2020. p. 147-165.

Research output: Chapters, Conference Papers, Creative and Literary Works (RGC: 12, 32, 41, 45)Chapter in research book/monograph/textbook (Author)