Influence of Fill Point in Multiple-Heat-Sources Looped District Heating System with Distributed Variable-Speed Pumps

2020 ◽  
Vol 29 (5) ◽  
pp. 1206-1222
Author(s):  
Tong Xu ◽  
Jing Yan ◽  
Xinlei Wang ◽  
Hai Wang ◽  
Tong Zhu ◽  
...  
Keyword(s):  
District Heating ◽  
Heating System ◽  
Heat Sources ◽  
Variable Speed ◽  
District Heating System

The Optimization Analysis of Hydraulic Junction Location of Three-Sources Branched Heat-Supply Network

2014 ◽  
Vol 638-640 ◽  
pp. 2101-2105
Author(s):  
Lin Hua Zhang ◽  
Dong Yang ◽  
Ting Ting Chen ◽  
Shou Jun Zhou ◽  
Ling Liu
Keyword(s):  
Heat Supply ◽  
District Heating ◽  
Heating System ◽  
Optimization Method ◽  
Heat Sources ◽  
Supply Network ◽  
Optimization Analysis ◽  
District Heating System ◽  
Circulating Water ◽  
Water Pumps

In this paper, we shall first briefly introduce the hydraulic junction of three-sources branched heat-supply network and the related optimization method. It's difficult to guarantee that the system runs in optimal state and it increases energy consumption in the system. In view of this situation this paper proposes a method to find the optimal positions of hydraulic intersections based on analyzing a real heating system with three heat sources in Jining. The optimization objective is to minimize the electric power consumption of circulating water pumps in district heating system. Finally, optimization programs are designed and the optimized results verify the feasibility and validity of the method compared with conventional experience values.

scholarly journals Optimal operation of novel hybrid district heating system driven by central and distributed variable speed pumps

2019 ◽  
Vol 196 ◽  
pp. 211-226 ◽  
Author(s):  
Enwen Gong ◽  
Na Wang ◽  
Shijun You ◽  
Yaran Wang ◽  
Huan Zhang ◽  
...  
Keyword(s):  
District Heating ◽  
Heating System ◽  
Optimal Operation ◽  
Variable Speed ◽  
District Heating System

Life cycle assessment of base–load heat sources for district heating system options

2011 ◽  
Vol 16 (3) ◽  
pp. 212-223 ◽  
Author(s):  
Saeed Ghafghazi ◽  
Taraneh Sowlati ◽  
Shahab Sokhansanj ◽  
Xiaotao Bi ◽  
Staffan Melin
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
District Heating ◽  
Heating System ◽  
Heat Sources ◽  
District Heating System ◽  
Base Load

Optimal diameter of district heating pipe network based on the hybrid operation of distributed variable speed pumps and regulating valves

2021 ◽  
pp. 1420326X2110078
Author(s):  
Li Bai ◽  
Hongkai Liu ◽  
Chuck Wah Yu ◽  
Zhen Yang
Keyword(s):  
District Heating ◽  
Heating System ◽  
Pipe Diameter ◽  
Variable Speed ◽  
Pipe Network ◽  
Safe Operation ◽  
Pump System ◽  
District Heating System ◽  
Pump Operation ◽  
Hybrid Operation

The district heating system that uses the hybrid operation of distributed variable speed pumps and regulating valves can effectively reduce the pressure level at the far-end of the heating network, while retaining the energy saving advantages of the distributed variable speed pump system and ensuring the safe operation of the heating network. In this study, pipe network optimization based on genetic algorithm was used to determine the pipe diameter required for the hybrid operation of distributed variable speed pumps and regulating valves. A mathematical model was established to evaluate the economic efficacy based on the annual equivalent cost. The zero-pressure difference point was evaluated to optimize the pipe diameter. A real pipe network was assessed to evaluate the efficacy of the method, and a sensitivity analysis of pressure constraints and economic factors was conducted. Our results show the system of hybrid operation of distributed variable speed pumps and regulating valves can reduce the annual equivalent cost by about 10.35% compared to the conventional central circulating pump system. In addition, the annual energy consumption due to heat loss and pump operation is only 0.36% higher than that of the conventional central circulating pump system.

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