| 摘要: |
| 针对离心式冷水机组的性能特点，本文提出了在通过最大电流判断的最大能力和通过喘振判断的最小能力之间的能量范围内，采用压缩机功率和冷凝器传热计算迭代得出较为精确的机组性能仿真算法。在此基础上，开发了集壳管式换热器传热计算、离心压缩机性能计算、喘振预测等模型为一体的离心式冷水机组性能仿真软件，并通过样机测试结果验证了软件的仿真精度，结果表明，全负荷范围内COP、冷冻水压降、冷却水压降、功率、蒸发温度、冷凝温度的最大误差分别为6.43%、7.28%、4.45%、6.87%、3.83%、1.24%，实现了离心式冷水机组在不同负荷下的不同冷冻、冷却水温度、流量等多元参数的性能仿真计算。 |
| 关键词: 离心式冷水机组 软件研发 仿真计算 COP |
| DOI： |
| Received:May 25, 2022Revised:June 13, 2022 |
| 基金项目: |
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| Simulation of the Performance of a Centrifugal Chiller |
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Luo Yi, Zhang Libiao, Hang Bingbing, Gong Chengcheng
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| (Zhejiang King Co., Ltd.) |
| Abstract: |
| In terms of the performance characteristics of a centrifugal chiller, a performance simulation algorithm was proposed using the iterative calculation of compressor power and condenser heat transfer in the range between the maximum capacity based on the maximum current and the minimum capacity with respect to surge. Thus, a performance simulation software for the centrifugal chiller integrating the heat transfer calculation of the shell and tube heat exchanger, performance calculation of the centrifugal compressor, and surge prediction was developed. The accuracy of the simulation model was verified using the prototype test results. The results indicate that within the entire load range, the maximum error of the COP is 6.43%; the maximum error of the chilled water pressure drop is 7.28%; the maximum error of the cooling water pressure drop is 4.45%; the maximum error of the power input is 6.87%; the maximum error of the evaporator saturation temperature is 3.83%, and the maximum error of the condenser saturation temperature is 1.24%. The simulation software successfully predicts various parameters, such as chilled water temperatures, cooling water temperatures, and flow rates of the centrifugal chiller under different loads. |
| Key words: centrifugal chiller software development simulation COP |
