Scientific journal NRU ITMO
Series "Refrigeration and Air Conditioning"
Registration certificate ЭЛ № ФС 77 – 55410 от 17.09.2013
зарегистрировано в Федеральной службе по надзору в сфере связи, информационных технологий и массовых коммуникаций

2014 (published: 11.02.2014)

Number 1(14)

Home > Issue > Calculation of expulsion process of wet screw refrigeration compressor

UDC 621.514

Calculation of expulsion process of wet screw refrigeration compressor

Noskov A.N., Zverev D.I. , Tarasenkov D.S.

Calculation method for the pressurization of screw compressor, which considers features of oil-filled refrigeration compressor is given. Two stages of process when internal pressure is lower then discharge pressure is considered. Depending for calculation pressure in working space of these stages is identified. Considered compressor operation composed of medium-temperature chiller at refrigerant R717 and R404a, and composed of lower branch cascade chiller at refrigerant R23 and R744. Provides efficiency indicators, relative resistance in discharge process, relative energy loss in inflow process from discharge port depending on volume ratio. In medium-temperature chiller mode energy efficiency of screw compressor on refrigerant R717 above then on R404а, and in lower branch cascade chiller on refrigerant R744 refrigerant R23 of all volume ratios.
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Keywords: wet screw refrigeration compressor, discharge process calculation, energy loss of compressor in discharge process

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