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首页> 外文期刊>International journal of air-conditioning and refrigeration >Nonisentropic Phenomenological Model of a Reciprocating Compressor
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Nonisentropic Phenomenological Model of a Reciprocating Compressor

机译：往复式压缩机的非等熵现象学模型

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摘要

This paper presents the development of a numerical, iterative and nonisentropic model for the thermodynamic processes of a reciprocating compressor of a refrigeration system operating at steady state. The mathematical model was implemented using the scientific software Engineering Equation Solver (EES) and it is based on the application of the energy equations in four regions of the compressor: inlet duct and chambers of pre-compression, compression, and post-compression. The model was validated with experimental data collected from an open-drive reciprocating compressor, operating with the refrigerant R-134a at different suction and discharge pressures and with different compressor rotational speeds. Model validation was made comparing the values of the mass flow rate and the discharge temperature of the compressor generated by the model with their corresponding experimental values for 33 experimental tests, the mean relative difference was —0.2% for the discharge temperature and 2.9% for mass flow rate. In this validation, the output variables of the model were calculated considering the uncertainties from the input variables. The theoretical mean standard uncertainty is 2% for discharge temperature and 6% for mass flow rate. An analysis of the capacitive and thermal performance of the compressor was made using the model, which demonstrates a decrease in the capacitive and thermal efficiencies for increasing the pressure ratio or clearance volume.
机译：本文介绍了在稳态下运行的制冷系统的往复式压缩机的热力学过程的数值，迭代和非等熵模型的开发。数学模型是使用科学软件工程方程求解器（EES）实施的，它基于能量方程在压缩机四个区域中的应用：进气管道和预压缩，压缩和后压缩腔室。该模型已通过从开式往复式压缩机中收集的实验数据进行了验证，该实验数据是在制冷剂R-134a以不同的吸入和排出压力以及不同的压缩机转速运行的情况下进行的。对模型产生的压缩机的质量流率和排气温度值与33个实验测试的相应实验值进行比较，进行模型验证，排气温度的平均相对差为-0.2％，质量为2.9％流量。在此验证中，考虑输入变量的不确定性来计算模型的输出变量。理论平均标准不确定度对于排放温度为2％，对于质量流量为6％。使用该模型对压缩机的电容和热性能进行了分析，结果表明，随着压力比或间隙体积的增加，电容和热效率会降低。

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