Influence of the water tank size and air source heat pump size on the energy saving potential of the energy storage heating system
Influence of the water tank size and air source heat pump size on the energy saving potential of the energy storage heating system
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DOI：
10.1016/j.est.2022.105542
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发表时间：
2022-11
影响因子：
9.4
通讯作者：
Weihua Lyu;Zhichao Wang;Xiaofeng Li;Gaofeng Deng;Zhaowei Xu;Hao Li;Yingxia Yang;B. Zhan;Mingyang Zhao
中科院分区：
文献类型：
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作者：
Weihua Lyu;Zhichao Wang;Xiaofeng Li;Gaofeng Deng;Zhaowei Xu;Hao Li;Yingxia Yang;B. Zhan;Mingyang Zhao
“清洁供暖”已成为我国节能减碳的国家战略。空气源热泵与水箱相结合的蓄能供暖系统在以往的研究中已经被证明是节能的。然而，如何根据建筑热负荷分布确定储水箱和空气源热泵的尺寸还没有得到全面的研究。本文在TRNECK平台上建立了蓄能供热系统的模型，并通过长期监测数据进行了验证。综合考察了储水箱尺寸和空气源热泵尺寸对蓄能供暖系统节能潜力的影响。结果表明，即使是一个小水箱，即，0.06 m3~ 0.5 m3，可有效降低空气源热泵的启停损失。当水箱容积增加到0.5 m3和1 m3时，启停损失分别从12.5%降低到0.8%和0.2%。当水箱容积从1 m3增加到4 m3时，蓄能供暖系统与基准供暖系统之间空气源热泵的平均运行温差从0.7 ℃增加到3.3 ℃，运行温差引起的相应节能率约为1.0%~ 6.3%。当热泵规模在建筑物设计热负荷的80%~ 100%之间变化时，节能率变化在1%以内。可以在一定程度上减小ASHP的尺寸，以减少储能供热系统的投资。
“Clean heating” has become a national strategy for energy conservation and carbon reduction in China. The energy storage heating system with air source heat pump and water tank has been proven to be energy saving in the previous studies. However, how to determine the sizes of the water storage tank and the air source heat pump based on the building heating load profile has not been investigated comprehensively. In this paper, the model of the energy storage heating system is established on the TRNSYS platform and validated by long-term monitored data. The influence of the water storage tank size and the air source heat pump size on the energy saving potential of the energy storage heating system is investigated comprehensively. The results show that even a small water tank, i.e., 0.06 m3~ 0.5 m3, can reduce the start-stop loss of the air source heat pump effectively. When the water tank volume increases to 0.5 m3and 1 m3, the start-stop loss is reduced from 12.5 % to 0.8 % and 0.2 %, respectively. When the water tank volume increases from 1 m3to 4m3, the average operating temperature difference of the air source heat pump between the energy storage heating system and the baseline heating system increases from 0.7 to 3.3 °C, and the corresponding energy saving rates caused by the operating temperature difference is approximately 1.0 % ~ 6.3 %. When the ASHP size varies from 80 % to 100 % of the design heating load of the building, the energy saving rates change within 1 %. The ASHP size can be reduced to a certain extent to reduce the investment of the energy storage heating system.