In this paper a mathematical model for the working process of a refriceration helical screw compressor is presented and discussed. The manner in which geometric parameters such as cell volume, sealing line length, blow hole are..,, discharge port area etc. a.re related to rotation angle is established a.nd used in the thermodynamic model which is based on real cas laws. The influence of factors...

To curtail data centers’ huge cooling power consumption and water demand (for cooling), air-side economizer has been increasingly adopted to cool down servers. Recently, another sustainability practice, rainwater harvesting, has also seen a growing adoption in data centers, potentially leading to water self-sufficiency without connecting to water utilities to supply cooling water. Nonetheless, ...

Aiming at solving the problems of high compressor discharge temperature, pressure, insufficient cooling capacity, and reduced system efficiency in air-conditioning pure electric passenger cars summer temperature environment, this paper develops a low pressure economizer using principle quasi-two-stage compression cycle. The heat pump air conditioning air-supplemented car is set up to study its ...

The degree of integration IT devices and consumption cooling energy are consistently increasing owing to developments in the data center industry. Hence, ensure smooth operation fault prevention devices, systems has increased, leading active research on improvements system performance for reducing consumption. This study examines reduction using a simulation by applying chilled water control wa...