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Quantitative and qualitative evaluation of various positive-displacement compressor modeling platforms
International Journal of Refrigeration ( IF 3.9 ) Pub Date : 2020-07-15 , DOI: 10.1016/j.ijrefrig.2020.07.009
M. Mohsin Tanveer , Craig R. Bradshaw

Several regulatory measures aimed to mitigate climate change are forcing compressor manufacturers to replace current refrigerants to those with low Global Warming Potential (GWP). New refrigerants need to be evaluated to ensure adequate efficiency for use in modern products. Evaluation can be done heuristically, which is expensive and time-consuming, while a carefully designed simulation model can provide similar outcomes for a significantly reduced cost. This paper presents a comparison between various user-developed and existing reciprocating compressor models to assist in the selection of a suitable modeling platform for a wide-ranging study. The reciprocating compressor is selected because of the simplicity of the model to ensure consistency across different platforms. The user-developed models are developed in MATLABTM and ModelicaTM for the reciprocating compressor. The same compressor is also modeled using existing compressor modeling platforms, PDSim and GT-SuiteTM. The compressor model includes three main components; geometry, compression process and frictional losses. Other sub-models, like valve model and heat transfer model, are also part of the compression process. These platforms are evaluated based on both quantitative and qualitative criteria. ModelicaTM is found to be computationally efficient while GT-SuiteTM took maximum time for simulation among the compared platforms. On a qualitative basis, PDSim is potentially a better platform for compressor optimization; which is also readily available to end user due to its open-source nature and prospects for future model development.



中文翻译:

各种容积式压缩机建模平台的定性和定量评估

旨在缓解气候变化的几项监管措施正迫使压缩机制造商将当前的制冷剂替换为全球变暖潜势(GWP)较低的制冷剂。需要评估新的制冷剂,以确保用于现代产品的足够效率。可以试探性地进行评估,这既昂贵又费时,而精心设计的仿真模型可以提供相似的结果,从而显着降低成本。本文介绍了各种用户开发的和现有的往复式压缩机模型之间的比较,以帮助选择适合的模型平台进行广泛的研究。之所以选择往复式压缩机,是因为该模型非常简单,可以确保不同平台之间的一致性。用户开发的模型是在MATLAB中开发的TM和Modelica TM用于往复式压缩机。还可以使用现有的压缩机建模平台PDSim和GT-Suite TM对同一压缩机进行建模。压缩机模型包括三个主要部分:几何形状,压缩过程和摩擦损失。其他子模型,例如阀门模型和传热模型,也是压缩过程的一部分。这些平台基于定量和定性标准进行评估。发现Modelica TM具有较高的计算效率,而GT-Suite TM在比较的平台之间花费了最多的时间进行仿真。从质量上讲,PDSim可能是一个更好的压缩机优化平台。由于其开放源代码的性质和未来模型开发的前景,最终用户也可以轻松使用它。

更新日期:2020-09-13
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