CO2 trans-critical compressors

By Dorin, published Sep 19, 2011 - 5 pages

This work from Giacomo Pisano and Mauro Dallai from Dorin is aiming to offer a qualitative analysis of how different design concepts impact on compressor heat transfer and dissipation, leading to diverse performances both in terms of reliability and efficiency.

Carbon dioxide (R744 - CO2) is nowadays considered one of the most attractive long term solutions for commercial and industrial refrigeration applications, as well as for hot water heat pumps. This refr

This work from Giacomo Pisano and Mauro Dallai from Dorin is aiming to offer a qualitative analysis of how different design concepts impact on compressor heat transfer and dissipation, leading to diverse performances both in terms of reliability and efficiency.

Carbon dioxide (R744 - CO2) is nowadays considered one of the most attractive long term solutions for commercial and industrial refrigeration applications, as well as for hot water heat pumps. This refrigerant thermodynamic characteristics lead to somewhat high discharge temperatures (up to 200°C), this having a significant impact on both oil temperature, thus affecting its lubricity, and refrigerant suction temperature and density, thus affecting compressor volumetric and isentropic efficiency. Therefore, improving discharge gas heat rejection it is possible to increase both compressor reliability and efficiency.


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