| 摘要: |
| 针对目前变流量制冷系统仿真算法设计研究不多以及通用性不足，提出一种物理意义明确且通用的迭代算法（简称为ALG-I）及其变种算法（简称为ALG-II）。对迭代变量的选择，迭代判据的确定给出了操作准则和方法。对算法流程的关键步骤进行了详细阐述。ALG-I与ALG-II具有相似特性但需要的仿真时间不同。仿真结果表明，提出的算法能适用于任意数目蒸发器的变流量制冷系统仿真，且仿真时间未随蒸发器个数增大而急剧增加，表明算法具有与蒸发器个数无关的通用特性。从控制分析需要快速响应的要求来看，对于一拖一系统， ALG-II比ALG-I有优势，而对于一拖多系统，ALG-I则比ALG-II有优势。最后，系统对连续变化的控制变量（包括膨胀阀开度及压缩机转速）的合理响应表明提出的算法可以有效地用于VRF系统的能耗与控制仿真。 |
| 关键词: 制冷系统 变制冷剂流量 仿真 通用算法 控制分析 |
| DOI： |
| 投稿时间：2012-12-21
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| 基金项目: |
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| A Generalized Algorithm for the Simulation of Multi-evaporator Variable Refrigerant Flow Systems |
| Zhu Yonghua,Jin Xinqiao,Fu Sijie,Fang Xing,Du Zhimin |
| (School of mechanical engineering, Shanghai Jiao Tong University) |
| Abstract: |
| A generalized algorithm called ALG-I as well as a companion algorithm called ALG-II, for simulation of variable refrigerant flow (VRF) systems were proposed. Firstly, the principles and methods to find the criteria of iterative calculation and choose the variables of iterative calculation were introduced. Then, the standard algorithm was organized by some proper combination between the iterative variables and the iterative criteria, and the critical steps of the algorithm were described in detail. ALG-I and ALG-II have very similar characteristics except time-consuming. Simulation results revealed that the models established are feasible and effective to simulate the VRF systems with different number of evaporators, which indicates the proposed system algorithms are generic and evaporator-number independent. For the VRF system with only one evaporator, the much larger time consuming of the ALG-I weakened the potential for control analysis applications, while for the multi-evaporator VRF system, the ALG-I has advantages over the ALG-II. Finally, tests also showed the proposed algorithms good ability responding to varying control variables including the openness of the throttling valves and speed of the compressor. It is concluded that the system model is feasible to be applied and lays solid foundation for the studies including performance and control analysis of the VRF systems. |
| Key words: refrigeration system variable refrigerant flow simulation generic algorithm control analysis |
