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The study on mass transport process in the cylinder of CO2 compressor based on p-V diagram by Wang, Tao; Wang, Jin; Guo, Yi; Peng, Xueyuan; Yang, Junling; Zhang, Zhentao is a Engineering article available to read on EtoBox.

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Ways to properly enhance the performance of a transcritical CO 2 refrigeration system is a hot topic. The internal mass transport process in the reciprocating compressor has a significant influence on the performance of a transcritical CO 2 refrigeration system. In this paper, a thermodynamic model of a transcritical CO 2 compressor is derived from the experimental p-V diagram in the expansion and compression phases. Based on this model, a novel measurement method for the mass of CO 2 in the cylinder is proposed, which can effectively analyze the CO 2 transport process in the cylinder. The result shows the residual mass of CO 2 in the clearance volume is closely related to the delayed closing time of the discharge valve and the rotational speed. Furthermore, the method can be used to calculate the mass flow rate of CO 2 . Compared with the measurement results of the flowmeter, the error of this method is within ± 5.2% under various rotational speeds and operating conditions.

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Author

Wang, Tao; Wang, Jin; Guo, Yi; Peng, Xueyuan; Yang, Junling; Zhang, Zhentao

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 1359-4311)

Published

2020

Language

EN

Field

Engineering (Physical Sciences)