Refrigerant 134a is the working fluid in a solar power operating on a Rankine cycle. Saturated vapor at (61+0.3*A) o C enters the turbine, and condenser operates at a pressure of 6 bar. The rate of energy input to collectors from solar radiation is 0.4 kW per m2 of collector surface area. Determine the minimum possible solar collector surface area in m2 , per kW of power developed by the plant.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

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

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero