寒冷地区某绿色建筑污水源热泵供暖季实际应用效果研究
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摘要
为探究供暖季污水源热泵系统在寒冷地区绿色建筑中实际运行效果,本文以实测运行数据为基础,从能源侧、供能系统和用户侧3个方面展开分析,掌握供暖季每个环节实际用能效果,逐步分析能源利用效率,辨识系统运行效果影响因素,提出设计及运行优化建议。研究表明,该污水源热泵系统可满足室内供暖需求,但系统制热性能较差,系统制热能效比COPsys平均值约为2.3;运行过程中,机组COP和系统COPsys均与机组负荷率呈负相关性,当机组负荷率为55%时,系统制热性能最优,COPsys约为2.75。为提升供暖季整体运行效果,运行过程中应根据建筑热负荷,调整运行机组数量及型号,减小室温与设计值差异,并优化机组控制方法,使机组长期维持在高COP负荷率范围运行。研究结果可为后续污水源热泵系统设计及运行优化方面研究提供一定参考。
To explore the application effect of sewage source heat pump system in green buildings during the heating season,the sewage source heat pump system in a green building in a cold region were analyzed on the basis of the measured data of heating operation. The actual energy utilization efficiency of the energy side,the energy supply system and the user side during the heating season was gradually analyzed and learnt respectively. The influencing factors of the operation effect of the system were identified,and the suggestions of the design and operation optimization were proposed. The results showed that the waste water system could meet the demand of indoor heating as a heat source,but the overall heating performance of the system was poor. The average heat efficiency ratio of the system( COPsys) was about 2. 3. During the operation,COP and the COPsyswere negatively correlated with the unit load rate. When the unit load rate reached 55%,COPsyswould be approximately 2. 75,and the optimal thermal performance of the system would be achieved at this time. In order to improve the overall operation effect during the heating season,the number and model of the operating units should be adjusted to enable the heat pump to keep running with a load ratio that results in high performance,according to the heating load of buildings. The research results can provide some reference for the design and operation optimization of the sewage water source heat pump system.
To explore the application effect of sewage source heat pump system in green buildings during the heating season,the sewage source heat pump system in a green building in a cold region were analyzed on the basis of the measured data of heating operation. The actual energy utilization efficiency of the energy side,the energy supply system and the user side during the heating season was gradually analyzed and learnt respectively. The influencing factors of the operation effect of the system were identified,and the suggestions of the design and operation optimization were proposed. The results showed that the waste water system could meet the demand of indoor heating as a heat source,but the overall heating performance of the system was poor. The average heat efficiency ratio of the system( COPsys) was about 2. 3. During the operation,COP and the COPsyswere negatively correlated with the unit load rate. When the unit load rate reached 55%,COPsyswould be approximately 2. 75,and the optimal thermal performance of the system would be achieved at this time. In order to improve the overall operation effect during the heating season,the number and model of the operating units should be adjusted to enable the heat pump to keep running with a load ratio that results in high performance,according to the heating load of buildings. The research results can provide some reference for the design and operation optimization of the sewage water source heat pump system.
引文
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[8]Na Qin,Peng Zhihao.The operation characteristics of sewage source heat pump system and the analysis of its thermal economic benefits[J].Applied Thermal Engineering,2017,124(01):108-1089
[9]马玉草,徐向荣.城市原生污水源热泵系统在工程中的应用分析[J].制冷与空调(四川),2009,23(05):45-48
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[12]林跃朝,刘立才.北京市地下水地源热泵系统应用效果分析评价[J].暖通空调,2014,44(7):63-66
[13]陈晓,肖双江.输送能耗对地源热泵系统节能率的影响分析[J].流体机械,2011,39(8):78-81
[14]中国建筑科学研究院.GB 50736—2012民用建筑供暖通风与空气调节设计规范[S].北京:中国建筑工业出版社,2012:5-11
[2]尹朝辉,刘芳,王志明,等.污水处理厂典型节能技术分析[J].建筑科学,2016,32(12):107-113
[3]Zhou Wenzhong,Li Jianxing.Sewage heat source pump system’s application examples and prospect analysis in China[EB/OL].(2004-6-12)[2017-10-10].http://docs.lib.purdue.edu/iracc
[4]申传涛,彭冬根,胡松,等.南昌市污水源热泵系统工程实例与应用可行性分析[J].可再生能源,2014,32(10):1510-1514
[5]庄兆意,吴德珠,张承虎,等.污水源热泵机组夏季运行工况实测与分析[J].可再生能源,2009,27(06):109-112
[6]Baek NC,Shin UC,Yoon JH.A study on the design and analysis of a heat pump heating system using wastewater as a heat source[J].Solar Energy,2005,78(3):427-440
[7]刘志斌.污水源热泵系统取水换热工艺中污水流动与换热特性研究[D].大连:大连理工大学,2014
[8]Na Qin,Peng Zhihao.The operation characteristics of sewage source heat pump system and the analysis of its thermal economic benefits[J].Applied Thermal Engineering,2017,124(01):108-1089
[9]马玉草,徐向荣.城市原生污水源热泵系统在工程中的应用分析[J].制冷与空调(四川),2009,23(05):45-48
[10]中国建筑科学研究院.GB 50189—2015公共建筑节能设计标准[S].北京:中国建筑工业出版社,2015:8
[11]全国冷冻空调设备标准化技术委员会.GB/T 19409—2013水(地)源热泵机组[S].北京:中国标准出版社,2013:3
[12]林跃朝,刘立才.北京市地下水地源热泵系统应用效果分析评价[J].暖通空调,2014,44(7):63-66
[13]陈晓,肖双江.输送能耗对地源热泵系统节能率的影响分析[J].流体机械,2011,39(8):78-81
[14]中国建筑科学研究院.GB 50736—2012民用建筑供暖通风与空气调节设计规范[S].北京:中国建筑工业出版社,2012:5-11