Effect of Condenser Temperature and Speed on one A/C System

Abstract

This study describes the results on the performance of one vehicle air conditioning system. The coefficient of performance, evaporator cooling capacity, compressor power consumption, total mass flow rate, vapor mass flow rate, liquid mass flow rate and oil in circulation, pressures and temperatures of refrigerant at every component (inlets and outlets) are measured and analyzed with the variation of the outside temperatures at the evaporator and condenser, the speed of the compressor, refrigerant charge and oil charge. The systematical experimental results obtained from this real-size test system depict the relations between the above parameters in a vehicle air conditioning system, which constitute a useful source for vehicle air conditioning systems design and analysis. The vapor quality (two-phase flow) measurements realized in this work provide an extremely important tool for diagnosing the system performances.

The Closed Impeller Milling Avoidance Programming Algorithm

“…The closed impeller is a part which fuses shaft, cover surface and leaves surfaces to form a flow channel, and the cavity is closed, processing difficulties. Therefore, carry out the five-axis NC machining of closed impeller has important significance [1][2][3][4]. Fig.…”