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建立了常规区域供冷系统的分析通用模型,用TRNSYS软件建立了常规区域供冷系统的逐时分析模型,并基于上海某中央商业中心进行了案例分析。结果表明,采用逐时室外环境参数作为分析的基准参数更符合实际情况;在机组配置和基准参数相同的前提下,采用台数与流量控制相结合的控制策略时,系统效率均高于,且系统损失均小于单纯采用台数控制的控制策略;制冷机损率份额最大;其次是二次泵、冷却塔,两者相差不大;接下来依次为冷却水泵、一次泵、集水器、换热器等。另外,单位冷量的损失与效率均可作为不同区域供冷系统进行分析的评价指标。
The general model of the general district cooling system was established. The time-dependent analysis model of the conventional district cooling system was established by using the TRNSYS software. The case analysis was carried out based on a central commercial center in Shanghai. The results show that the use of hourly outdoor environmental parameters as analysis of the baseline parameters is more in line with the actual situation; under the premise of the same unit configuration and baseline parameters, the system efficiency is higher than the control strategy combining the number of units and flow control, And the loss of the system is less than the control strategy using only the number of units; the largest share of the loss rate of the refrigerator; followed by the second pump, cooling tower, the difference between the two is not; followed by the cooling water pump, a pump, water collector , Heat exchanger and so on. In addition, the unit capacity of the loss and efficiency can be used as a cooling system in different regions, analysis of the evaluation index.