Refrigerant-134a enters an adiabatic compressor at 100 kPa and –24°C with a flow rate of 1.3 m3/min and leaves at 800 kPa and 60°C. Determine the mass flow rate of R-134a and the power input to the compressor. Use data from the steam tables. Heat transfer with the surroundings is negligible. Neglect kinetic and potential energy changes.

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature