Add to ORKGLow global warming refrigerants such as HFO (hydro fluoro olefin) -1234yf are attracted as an alternative working fluid in air-conditioning and cooling systems to address global warming. However, it used to require larger compressor size due to the lower fluid density compared with conventional refrigerants such as R410A. Thus, a new wing-vane compressor which has no contraction between the vane and the cylinder is developed to prevent increase in the size without performance degradation. The wing-vane compressor has higher compression efficiency compared to the conventional vane compressor as it has no friction loss of the tip of the vane and it can significantly reduce the mechanical loss for the conventional vane compressor. Since the st...