R134a螺杆制冷压缩机工作过程数值模拟及实验研究

为了深入研究螺杆制冷压缩机内部的微观工作过程,建立了描述R134a螺杆制冷压缩机工作过程的热力学模型,全面考虑了螺杆制冷压缩机的5个泄漏通道损失、油气混合物热交换、喷油和部分负荷对压缩机工作过程的影响.为了验证数学模型,录取了表征螺杆制冷压缩机工作过程的p-V指示图及测试了压缩机宏观性能参数.通过比较表明,理论计算结果符合实验测试结果(误差小于4%),所建立的数学模型能准确地反映双螺杆制冷压缩机的工作过程特性及其宏观性能特征,为螺杆制冷压缩机的设计参数优化提供了理论及实验依据.

Theoretical and Experimental Investigation on Working Process of Screw Refrigeration Compressor with R134a

To acquaint the working process of screw refrigeration compressor with R134a thoroughly, a new thermodynamic with model for screw refrigeration compressor is proposed, in which the effects, such as internal leakage through five paths, gas-oil heat transfer,oil injection and part load, are taken into account simultaneously. The experimental recording of p-V indicator diagram and the measurement of screw refrigeration compressor performance are carried out to confirm the model. The theoretical calculation results coincide with the measured data well. The proposed model provides a basis for the performance prediction.