Mathematical modelling of supermarket refrigeration systems for design, energy prediction and control
Mathematical modelling of supermarket refrigeration systems for design, energy prediction and control
复制标题
超市制冷系统的数学建模，用于设计、能源预测和控制
DOI：
10.1243/0957650001538218
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
S. Tassou
中科院分区：
文献类型：
--
作者：
Y. Ge;S. Tassou
本文描述了一种用于模拟超市制冷系统性能的数学模型。该模型可以用来比较不同的系统和控制策略的能量和总的当量变暖影响。该模型基于在TRNsys环境中链接在一起的大量组件模型。主要部件型号包括压缩机、风冷冷凝器、恒温膨胀阀、展示柜和控制器。整个系统模型已经根据从苏格兰一家超市的实验室系统和全尺寸系统获得的监测数据进行了验证。通过对水头压力和变速控制与定水头压力和恒速控制效果的比较，说明了该模型的应用价值。结果表明，即使在夏季环境条件下，该系统也可以在比实际中采用定压控制策略时低得多的水头压力下运行而不会出现问题。在其中一台压缩机上使用变速控制还可以更好地控制吸气压力，并与开关控制相比节省大量(高达23%)的能源。
Abstract This paper describes a mathematical model developed to simulate the performance of supermarket refrigeration systems. Such a model can be used for the comparison of different systems and control strategies in terms of their energy and total equivalent warming impact. The model is based on a large number of component models which have been linked together within the TRNSYS environment. Major component models include the compressor, air-cooled condenser, thermostatic expansion valve, display cabinet and control. The overall system model has been validated against monitored data obtained from both a laboratory-based system and a full-scale system in a supermarket in Scotland. The value of the model is illustrated by determining and comparing the effectiveness of head pressure and variable-speed control against fixed head pressure and constant speed control. It is shown that even at summer ambient conditions the system can be operated without problems at much lower head pressures than is done in practice under fixed-pressure control strategies. The use of variable-speed control on one of the compressors can also provide better control of the suction pressure and a substantial (up to 23 per cent) energy savings compared to on-off control.