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2026 , Vol. 35 >Issue 1: 35 - 49

DOI: https://doi.org/10.1007/s11630-025-2203-5

Common Design Method and Performance Prediction for Near-Critical Region Compressors

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  • 1. Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding 071003, China
    2. Key Laboratory of Power Station Energy Transfer Conversion and System, North China Electric Power University, Ministry of Education, Beijing 102206, China

网络出版日期: 2026-01-05

基金资助

The research is supported by the National Key R&D Program of China (No. 2023YFB4102504) and the National Natural Science Foundation of China (No. 52206010, No. 52130608).

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Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025
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Common Design Method and Performance Prediction for Near-Critical Region Compressors

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  • 1. Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding 071003, China
    2. Key Laboratory of Power Station Energy Transfer Conversion and System, North China Electric Power University, Ministry of Education, Beijing 102206, China

Online published: 2026-01-05

Supported by

The research is supported by the National Key R&D Program of China (No. 2023YFB4102504) and the National Natural Science Foundation of China (No. 52206010, No. 52130608).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025
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摘要

工质在近临界区的压缩耗功小，基于这一特性可构建高效发电或储能系统，但目前还没有对不同类别工质近临界区压缩的共性特性研究。本文以H2O、CO2和R134a为研究对象，首先针对工质在近临界区物性的共性特点，提出了近临界压缩机共性一维设计方法和性能预测模型，并依据设计结果建立模型并进行数值模拟，结果表明数值模拟与性能预测结果有4%左右的误差，这是由于这是由工质粘度和工况变化共同导致的。因此根据工质的粘度对通流损失系数和摩擦系数进行修正，并且引入衡量出口气流角变化的滑移因子模型与流量修正系数以考虑转速与流量变化对损失模型造成的影响。优化后的性能预测结果与数值模拟结果的误差保持在1.2%以内，体现出新模型在预测不同工质近临界压缩性能的优势。

关键词： centrifugal compressor; near-critical state; one-dimensional design; performance prediction; numerical simulation

本文引用格式

SUN Enhui, LIAO Kailong, ZHANG Lei, CHEN Feng, ZHANG Qiukai, LIU Yanfeng . Common Design Method and Performance Prediction for Near-Critical Region Compressors[J]. 热科学学报, 2026 , 35(1) : 35 -49 . DOI: 10.1007/s11630-025-2203-5

Abstract

The compression power consumption of the working fluids in the near-critical region is low. However, there is currently no research on the common characteristics of near-critical region compression for different types of working fluids. This paper takes H2O, CO2, and R134a as research subjects, and based on the common characteristics of the physical properties of working fluids in the near-critical region, a 1D common design method and performance prediction model for near-critical compressors are proposed. Meanwhile, 3D models of centrifugal compressors are established based on the 1D design results. The 3D numerical simulations results show that there is about a 4% error between the numerical simulation results and the 1D performance prediction. Therefore, a slip factor model and a flow correction coefficient are introduced to account for the impact of rotating speed and mass flow rate changes on the loss models. At the same time, the friction loss coefficient and through-flow loss coefficient are corrected based on the viscosity of different working fluids. After optimization, the error under off-design conditions between the numerical simulation results and the 1D performance prediction results is maintained within 1.2%, demonstrating the advantage of the new model in predicting the near-critical compression performance of different working fluids.

Key words： centrifugal compressor; near-critical state; one-dimensional design; performance prediction; numerical simulation

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