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semi-hermetic screw compressor
相关语句
  半封闭螺杆压缩机
     Based in the history and basic principles of screw compressor, this paper systematically studies, analyses and develops a new semi-hermetic screw compressor with a pair of speed increase gears and a new water chiller with the new compressor.
     本文从螺杆压缩机的发展和基本理论研究出发,针对一种带增速齿轮的半封闭螺杆压缩机和由此压缩机所组成的冷水机组进行系统的研究、分析与开发。
短句来源
     The paper provides a set of entire design principle about the semi-hermetic screw compressor and water chiller.
     本文为半封闭螺杆压缩机和冷水机组提供了一整套完整的设计方法。
短句来源
  半封螺杆压缩机
     Illustrates the superiority and inferiority of different motor cooling modes for full-or semi-hermetic screw compressor,and corresponding disposition and performance differences.
     阐述三种常见全封或半封螺杆压缩机电机冷却方式的优劣,以及不同的电机冷却方式造成的在系统配置和性能方面的差异。
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Illustrates the superiority and inferiority of different motor cooling modes for full-or semi-hermetic screw compressor,and corresponding disposition and performance differences.

阐述三种常见全封或半封螺杆压缩机电机冷却方式的优劣,以及不同的电机冷却方式造成的在系统配置和性能方面的差异。

>=In the applications of the air - source heat pump, the semi - hermetic screw compressors are usually suffered with high discharge temperature and high temperature of electric motor. In order to solve those problems, three cooling methods are used which include oil cooling, injecting liquid refrigerant into compression chamber and injecting liquid refrigerant into suction line. In this paper, the effect of these cooling methods on the performance of semi - hermetic screw compressor is...

>=In the applications of the air - source heat pump, the semi - hermetic screw compressors are usually suffered with high discharge temperature and high temperature of electric motor. In order to solve those problems, three cooling methods are used which include oil cooling, injecting liquid refrigerant into compression chamber and injecting liquid refrigerant into suction line. In this paper, the effect of these cooling methods on the performance of semi - hermetic screw compressor is studied by the experiments. It is shown that the oil cooling is not only reducing the discharge temperature and the electric motor temperature, but also improve the compressor's adiabatic efficiency and the COP of heat pump. Injecting liquid refrigerant into suction line can decrease the discharge temperature and electric motor temperature much more than oil cooling. This method can also improve the compressor's adiabatic efficiency, but the COP of heat pump will drop slightly. Injecting liquid refrigerant into compression chamber also can reduce the discharge temperature and improve the performance of compressor. But the electric motor temperature will increase and the heat pump's COP becomes lower.

目前,风冷热泵应用中存在着压缩机排气温度过高,电机温度偏高等不利条件。因此也影响了压缩机的性能。本文通过试验,进行对双螺杆制冷压缩机的多种冷却方式的研究,分析了中间喷液、尾部喷液以及油冷对于热泵系统中制冷压缩机的排气温度、电机温度、压缩机性能及风冷热泵系统性能的影响。经过试验验证,对压缩机进油进行冷却不仅可以降低压缩机排气温度和电机温度,提高压缩机的性能,而且对于系统的性能也有一定的改善;尾部喷液对于压缩机的排气温度及电机温度降低非常有利,但在一定程度上降低了系统的性能;中间喷液方式,虽然它降低了压缩机排气温度,提高了压缩机热力性能,但增加了电机的温度,降低了系统的性能。

 
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