Generic load regulation strategy for enhancing energy efficiency of chiller plants  

作　　者：Hang Wan Yuyang Gong Shengwei Wang Yongjun Sun Tao Xu Gongsheng Huang 

机构地区：[1]Department of Architecture and Civil Engineering,City University of Hong Kong,Hong Kong,China [2]Department of Building Environment and Energy Engineering,Hong Kong Polytechnic University,Hong Kong,China [3]School of Civil Engineering,Guangzhou University,Guangzhou,China [4]Shenzhen Research Institute of City University of Hong Kong,Shenzhen,China

出　　处：《Building Simulation》2024年第8期1273-1287,共15页建筑模拟（英文）

基　　金：the funding support by a CRF from UGC Hong Kong(C5018-20G);a MFPRC from City University of Hong Kong(9680328);a Guangzhou International Science and Technology Cooperation project(2021A0505030077).

摘　　要：In many chiller plants,high coefficient of performance(COP)is only achieved at a few favorable part load ratios(PLRs),while the COP is low at many other non-favorable PLRs.To address this issue,this study proposes a generic load regulation strategy that aims to maintain chiller plants operating at high COP,particularly under non-favorable PLRs.This is achieved by incorporating thermal energy storage(TES)units and timely optimizing the charging and discharging power of the integrated TES units.The optimal charging and discharging power is determined by solving a dynamic optimization problem,taking into account the performance constraints of the TES units and the chiller plants.To provide an overview of the energy-saving potential of the proposed strategy,a comprehensive analysis was conducted,considering factors such as building load profiles,COP/PLR curves of chillers,and attributes of the TES units.The analysis revealed that the proposed load regulation strategy has the potential to achieve energy savings ranging from 5.7%to 10.8%for chiller plants with poor COPs under unfavorable PLRs,particularly in buildings with significant load variations.

关 键 词：load regulation thermal energy storage chiller plants building energy efficiency 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]