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Performance analysis of hybrid ground-coupled heat pump system with multi-functions

机译：多功能混合式地面耦合热泵系统性能分析

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摘要

Underground thermal imbalance is a significant problem for ground-coupled heat pump (GCHP) systems that serve predominately heated buildings in cold regions, which extract more heat from the ground and inject less heat, especially in buildings requiring domestic hot water (DHW). To solve this problem, a previously developed heat compensation unit with thermosyphon (HCUT) is integrated with a GCHP unit to build a hybrid GCHP system. To improve the energy savings of this hybrid GCHP system, the HCUT unit is set to have multiple functions (heat compensation, direct DHW and direct space heating) in this paper. To analyze the improved system performance, a hotel requiring air-conditioning and DHW is selected and simulated in three typical cold cities using the dynamic software DeST and TRNSYS. The results indicate that the hybrid GCHP system can maintain the underground thermal balance while keeping the indoor air temperature within the design range. Furthermore, the HCUT unit efficiently reduces the energy consumption via its multi-functional operations. Compared to the previous system that only used HCUT for heat compensation, adding the direct DHW function further saves 7.5-11.0% energy in heat compensation (HC) and DHW (i.e., 3.6-4.8% of the whole system). Simultaneously adding the direct DHW and space heating functions to the HCUT can save 9.8-12.9% energy in HC and DHW (i.e., 5.1-6.0% of the whole system). The hybrid GCHP system with a multi-functional HCUT provides more energy savings while maintaining the underground thermal balance in cold regions that demand both air-conditioning and DHW.
机译：对于在寒冷地区主要供暖的建筑物使用的地面耦合热泵（GCHP）系统而言，地下热失衡是一个重大问题，尤其是在需要生活热水（DHW）的建筑物中，该系统为地表中加热的建筑物提供更多热量。为了解决这个问题，将先前开发的带有热虹吸管的热补偿单元（HCUT）与GCHP单元集成在一起，以构建混合GCHP系统。为了提高此混合GCHP系统的节能效果，本文将HCUT单元设置为具有多种功能（热补偿，直接DHW和直接空间加热）。为了分析改善的系统性能，选择了一家需要空调和DHW的酒店，并使用动态软件DeST和TRNSYS在三个典型的寒冷城市中对其进行了模拟。结果表明，混合GCHP系统可在保持室内空气温度在设计范围内的同时保持地下热平衡。此外，HCUT单元通过其多功能操作可有效降低能耗。与仅使用HCUT进行热量补偿的先前系统相比，添加直接DHW功能进一步节省了热量补偿（HC）和DHW能量的7.5-11.0％（即，占整个系统的3.6-4.8％）。同时在HCUT中添加直接的DHW和空间加热功能可以节省HC和DHW的9.8-12.9％的能量（即整个系统的5.1-6.0％）。带有多功能HCUT的混合GCHP系统可节省更多能源，同时在需要空调和DHW的寒冷地区保持地下热平衡。

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  • 来源
    《Energy Conversion & Management》 |2015年第3期|47-59|共13页
  • 作者

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

  • 作者单位

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Beijing 100084, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ground-coupled heat pump; Domestic hot water; Thermosyphon; Heat compensation; Energy-saving; Cold regions;

    机译：接地热泵;生活热水;热虹吸管;热补偿;节能;寒冷地区;

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