Abstract
A novel self-air-cooling reciprocating compressor (SACRC) is proposed, which can cool itself when it is working without adding any auxiliary equipment. The suction and discharge valve model are established considering thermodynamic and kinematics properties. The thermodynamic models of compressor and cooling system are respectively established considering their compressibility and heat exchange. The model of SACRC is finally achieved on the basis of building its energy network and it is verified by good curve-fitting between simulation and experiment at different conditions, which improves the compressor thermodynamic model theory. The results of characteristic analysis and comparative research show that the cooling system can obviously reduce the cylinder temperature and improve the volumetric efficiency, which makes it possible for compressor to realize high pressure and microminiaturization.
Highlights
Reciprocating compressor, as a common equipment in industry, plays a huge role because of its high pressure, compact structure and clean energy [1], [2]
Due to the large amount of heat generated in the compression process, the efficiency of high pressure reciprocating compressor without cooling system is only around 20%, which is quite low compared with electrical or mechanical efficiency [3]
This paper proposes a self-air-cooling reciprocating compressor (SACRC), which can cool the cylinder through airflow produced by itself without any auxiliary equipment
Summary
Reciprocating compressor, as a common equipment in industry, plays a huge role because of its high pressure, compact structure and clean energy [1], [2]. As an efficient cooling method, the liquid-cool [4]–[6] and air-cool [7], [8] are widely applied to cool the cylinder or inter-stage gas, which can even achieve isothermal compression They usually need additional auxiliary equipment and consume even more energy than compression. This paper proposes a self-air-cooling reciprocating compressor (SACRC), which can cool the cylinder through airflow produced by itself without any auxiliary equipment It does not need additional energy consumption and the volume and weight may be reduced. In order to study the cooling characteristics of SACRC, the thermodynamic model of SACRC is achieved through establishing the model of each component and their energy transfer network and it is verified by experiment under different conditions. Its thermodynamic characteristic is studied through analysis and comparison
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