The Proper Scale and Energy Efficiency Requirement of Seawater Source Heat Pump District Heating System
The energy consumed on the transportation pipeline of seawater source heat pump district heating system (SSHPDHS) is much larger than that of Chinese traditional boiler house district heating system (TBHDHS) for the same district heating area.This makes the control of the district heating scale a highlighted problem.This paper mainly studies on the proper scale of the district heating system from the perspective of confining the primary energy consumption ratio of transportation to heat supplied (PECRTHS) within a certain limit under the design condition.The calculations show that if the index of PECRTHS is set from 5% to 20% the maximum district radius of SSHPDHS with supply and return hot water temperature difference of 10℃ should be from 0.875km to 6.5km,and the maximum district radius of TBHDHS with supply and return hot water temperature difference of 25℃ should be from 3.7km to 17.75km comparatively.It is also found that the circulation pump in TBHDHS has little effect on the systems overall efficiency (average of 0.6%),whereas the circulation pump in SSHPDHS has relatively greater effect on the systems COP value (average of 4.6%) after simulation calculation for the assumed heating loads from 1000KW to 5000KW,and when the energy consumption of the seawater pump is considered at the same time,the systems COP value of SSHPDHS will be approximately 11.0% lower.
Seawater source heat pump District heating system Boiler house Energy efficiency
Haiwen Shu Lin Duanmu Yingxin Zhu Xiangli Li
School of civil and hydraulic engineering,Dalian University of Technology,Dalian,China School of civil and hydraulic engineering,Dalian University of Technology,Dalian,China Department of architecture science and technology,Qinghua University,Beijing,China
国际会议
The First International Conference on Building Energy and Environment(第一届建筑能源与环境国际会议)
大连
英文
94-100
2008-07-01（万方平台首次上网日期，不代表论文的发表时间）