The total cooling load for a building zone is 200,000 Btu/hr with a sensible heat ratio (SHR) of 0.8. The zone temperature is 74F. The supply air is at a temperature of 54F and a humidity ratio of 0.008 lbm/lbma. Determine (a) the supply airflow rate (cfm) and (b) zone relative humidity. (10 p

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