基于EES的船舶制冷压缩机仿真与优化

Simulation and Optimization of Marine Refrigeration Compressor Based on EES

为了使船舶制冷仿真系统达到更好的模拟效果,需要建立更为精确和高效的模型。基于拥有专业且成熟的热物性计算包的EES软件,结合船用制冷压缩机试验数据,对经验模型进行拟合验证和多工况下的性能预测,对半经验模型中的容积效率提出2种优化方法,并与传统计算方法进行对比,并分析和验证其优化效果。结果表明:经验模型在一定工况范围内具有良好的精度,可作为压缩机性能预测的参考;提出的容积效率优化计算模型相较于传统经验公式有着更高的精度,对于制冷仿真系统精度的提高有所帮助。

In order to achieve a better simulation effect of the ship refrigeration simulation system,it is necessary to establish a more accurate and efficient model.EES software is based on a professional and mature thermal property calculation package,combining with experimental data of marine refrigeration compressors.The empirical model is fitted and verified,and the performance prediction under multi-case conditions.Two optimization methods are proposed for the volumetric efficiency in the semi-empirical model,and compared with the traditional calculation methods to analyze and verify the optimization effect.The results show that the empirical model has good precision in a certain working condition and can be used as a reference for compressor performance prediction.The proposed volumetric efficiency optimization calculation model has higher precision than the traditional empirical formula,which can help to improve the accuracy of the refrigeration simulation system.