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Performance Evaluation of Geothermal Heat Pump With Direct Expansion Type Vertical Ground Heat Exchanger

机译：直接膨胀式立式地面换热器的地热热泵性能评估

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摘要

Vertical closed-loop groun-source heat pump systems have been installed widely in Korea since they can extract a moderate temperature level of geothermal heat in a relatively small area. For a ground heat exchanger, a vertical closed-loop type with brine circulation is mostly preferred since it is simpler and less harmful to the ground environment. However, it requires a secondary loop between the refrigerant in a heat pump and the brine. By adding a geothermal heat exchanger in the secondary heat exchange loop, circulation pumps should be attached and the temperature difference between refrigerant and ground would be increased, which causes performance degradation. In this paper, performances of direct expansion ground-source heat pump were evaluated mathematically as an alternative to the conventional secondary-loop ground-source heat pump.
机译：立式闭环接地源热泵系统在韩国已广泛安装，因为它们可以在相对较小的区域中提取中等温度的地热。对于地面热交换器，最优选具有盐水循环的立式闭环型，因为它更简单且对地面环境的危害较小。但是，这需要在热泵中的制冷剂和盐水之间形成次级回路。通过在次级换热回路中添加地热热交换器，应安装循环泵，并且制冷剂和地面之间的温差会增加，从而导致性能下降。本文通过数学评估了直接膨胀式地源热泵的性能，以替代传统的二次回路地源热泵。

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  • 来源
    《Heat Transfer Engineering》 |2015年第11期|1046-1052|共7页
  • 作者

    MINSUNG KIM; GILBONG LEE; YOUNG-JIN BAIK; HO-SANG RA;

  • 作者单位

    Thermal Energy Conversion Laboratory, Korea Institute of Energy Research, Daejeon, Korea;

    Thermal Energy Conversion Laboratory, Korea Institute of Energy Research, Daejeon, Korea;

    Thermal Energy Conversion Laboratory, Korea Institute of Energy Research, Daejeon, Korea,Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Korea;

    Thermal Energy Conversion Laboratory, Korea Institute of Energy Research, Daejeon, Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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