Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 39 m³/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 6.5 kW from the compressor to its surroundings. Assuming the ideal gas model for air and neglecting kinetic and potential energy effects, determine the power input, in kW. W cv i kW

Air enters a compressor operating at steady state at 1.05 bar, 300 K, with a volumetric flow rate of 21 m³/min and exits at 12 bar, 400 K. Heat transfer occurs at a rate of 3.5 kW from the compressor to its surroundings. Assuming the ideal gas model for air and neglecting kinetic and potential energy effects, determine the power input, in kW.

Refrigerant 134a enters an air conditioner compressor at 4 bar, 20°C, and is compressed at steady state to 12 bar, 80°C. The volumetric flow rate of the refrigerant entering is 4.5 m³/min. The work input to the compressor is 72 kJ per kg of refrigerant flowing. Neglecting kinetic and potential energy effects, determine the magnitude of the heat transfer rate from the compressor, in kW. Q cv = 36.607 x KW

Steam expands adiabatically through a turbine at steady state. The entering stream is at 1000 lbf/in.², 1000°F, and the exiting stream is a saturated vapor at 10, lbf/in.². Kinetic and potential energy effects are negligible. a. [5] Sketch the process on a T-s diagram, including the liquid-vapor dome. b. [5] How much work per lb of flow does the turbine produce, in Btu/lbm? c. [5] If the turbine produces 5000 kW of output power, determine the mass flow rate of steam in kg/s. d. [5] If this process were isentropic, the existing stream would no longer be a saturated vapor. Determine the final quality of steam in that case. e. [10] Determine the isentropic turbine efficiency.