城市轨道交通车站空调冷冻水系统定温差变供水温度和大温差控制策略转换条件研究
夏三县1张少晨2余伟之3篮杰3何大四2
Conversion Conditions for Fixed Temperature Difference with Variable Water Supply Temperature and Large Temperature Difference Control Strategies in Urban Rail Transit Station Air-conditioning Chilled Water System
XIA Sanxian1ZHANG Shaochen2YU Weizhi3LAN Jie3HE Dasi2
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作者信息:1.郑州地铁集团有限公司,450003,郑州
2.中原工学院能源与环境学院，450007，郑州
3.中铁第四勘察设计院集团有限公司，460063，武汉
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Affiliation:1.Zhengzhou Metro Group Co., Ltd., 450003, Zhengzhou, China
2.School of Energy &Environment, Zhong-yuan University of Technology, 450007, Zhengzhou, China
3.China Railway Siyuan Survey and Design Group Co., Ltd., 460063, Wuhan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.08.045
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中图分类号/CLCN:TU831.3+6∶U231.4
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栏目/Col:研究报告
摘要:
［目的］为实现城市轨道交通车站空调冷冻水系统在定温差变供水温度和大温差两种工况下的整体能耗最低，需对这两种控制策略的转换条件进行研究。［方法］以郑州某城市轨道交通车站为例，基于TRNSYS(瞬时系统模拟程序)建立定温差变供水温度和大温差两种工况下的空调冷冻水系统模型，在满足空调冷冻水系统末端制冷量需求的前提下，分别研究冷冻水温差不变、供水温度为7~12℃，以及供水温度不变、供回水温差为5~10℃时对空调冷冻水系统能耗的影响。［结果及结论］两种控制策略的转换条件为：负荷率小于等于40%时，使用定温差变供水温度控制策略更节能；负荷率大于50%时，更适合采用大温差控制策略。该转换条件不仅能满足车站人员舒适度的要求，还实现了两种控制策略联合调控的目标，最终达到降低空调冷冻水系统整体能耗的目的。
Abstracts:
［Objective］ To achieve the lowest overall energy consumption of urban rail transit station air-conditioning chilled water system under both fixed temperature difference with variable water supply temperature and large temperature difference conditions, it is necessary to study the conversion conditions between these two control strategies. ［Method］ Taking an urban rail transit station in Zhengzhou City as example, a model of air-conditioning chilled water system under the above two conditions is established using TRNSYS (transient system simulation tool) platform. Under the premise of maintaining the required cooling capacity at the terminal end of air-conditioning chilled water system, the impact on system energy consumption is studied in scenarios of a constant chilled water temperature difference with variable water supply temperature (7-12 ℃), and a constant water supply temperature with variable water supply-return temperature difference (5-10 ℃). ［Result & Conclusion］ The conversion conditions between the two control strategies are as follows: when the load rate is less than or equal to 40%, the fixed temperature difference with variable water supply temperature control strategy is more energy-efficient; when the load rate exceeds 50%, the large temperature difference control strategy is more suitable. These conversion conditions not only meet the comfort requirements of station personnel, but also achieve the goal of combined control strategy regulation, ultimately reducing the overall energy consumption of air-conditioning chilled water system.
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