| 摘要: |
| 公共建筑集中空调水系统能耗占建筑总能耗比例较高，各设备的合理启停及控制参数的优化设置在系统节能中起到了关键作用。本文在满足末端冷负荷的前提下，以系统总能耗最小为目标，提出了冷水机组、水泵启停优化策略及控制参数全局优化方法。以冷冻水供水温度、冷却水流量作为独立优化控制参数建立集中空调水系统能耗模型。以某建筑为例，利用DeST软件模拟了建筑空调负荷变化，对所提出的优化方法进行了验证，结果表明：在负荷率5%~100%变化范围内，冷水机组平均COP提高了10.9%，平均节省能耗8.9%，水泵平均节省能耗18.6%；在夏季典型日，集中空调水系统平均节省能耗20.4%。 |
| 关键词: 集中式空调系统 水系统 节能 优化 |
| DOI： |
| Received:March 16, 2021Revised:May 24, 2021 |
| 基金项目: |
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| Study on Energy-saving Optimization Strategy and Simulation of Central Air-conditioning Water System |
|
Fan Xinzhou, Yao ye
|
| (Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Shanghai Jiao Tong University) |
| Abstract: |
| The energy consumption of central air-conditioning water systems in public buildings accounts for a high proportion of their total energy consumption. The optimal start and stop strategy for each device and the settings of the control parameters play a key role in the system energy saving. In this study, a start-stop optimization strategy for the chiller and water pump and the global optimization method for the control parameters is proposed while aiming to satisfy the terminal cooling load and to minimize the total energy consumption of the system. The chilled water supply temperature and cooling water flow were considered as independent control parameters, and an energy consumption model of the central air-conditioning water system was established. The change in cooling load in one example building was simulated using DeST software, and the proposed optimization method was verified. The results indicate that the average coefficient of performance of the chiller was improved by 10.9%, the average energy consumption was reduced by 8.9%, and the average energy consumption of the water pump was reduced by 18.6% within the load rate range of 5% to 100%. On typical summer days, the central air-conditioning water system saves energy consumption by 20.4% on average. |
| Key words: central air-conditioning system water system energy-saving optimization |
