Modeling and optimization for the smart operation of a central chilled water system in a high-rise building

4th Asia Conference of International Building Performance Simulation Association

土木建筑工程

Wang, Hai^1 ; Meng, Hua^1 ; Ju, Ran^1 ; Xue, Feng^2 ; Li, Ting^2

School of Mechanical Engineering, Tongji University, No. 1239 Siping Road, Shanghai

200092, China^1

China Construction Engineering Design Group Corporation Limited, No. 15 Sanlihe Road, Beijin

100044, China^2

关键词: Chilled water systems;    Computation speed;    Electricity-consumption;    High rise building;    Hydraulic balance;    Hydraulic behavior;    Modeling and optimization;    Optimization modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/238/1/012063/pdf
DOI  :  10.1088/1755-1315/238/1/012063

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Besides meeting the cooling demands of each terminal space in a high-rise building, the smart operation of a central chilled water system is also aiming at saving more electricity. Hence, it is the key issue to distribute proper amount of chilled water to each room according to its cooling load variations, i.e. achieve hydraulic balance in the chilled water network. To save electricity consumption of both chillers and circulation pumps in operation, in this paper, a supervisory optimization model is proposed for a general chilled water system. An improved node method is also presented to simulate the hydraulic behavior of the general chilled water pipe network, which is particularly adapted for a high-rise building with faster computation speed and fine accuracy. Then the proposed model is validated in a real high-rise hotel in Shanghai. In the case study, comparing with conventional operation method (On/Off or PID control), the proposed smart operation method can save 15.4-29.3% of electricity for the chilled water system in the typical days of cooling season.