Refrigerant 134a exits a heat exchanger through a 0.75-in.-diameter tubing with a mass flow rate of 0.9 lb/s. The temperature and quality of the refrigerant are -15F and 0.05, respectively. Determine the velocity of the refrigerant in m/s.

A centrifugal air compressor compresses 200 cfm from 12 psia to 90 psia. The initial specific volume is 12.6 ft3/lb and the final specific volume is 3.25 ft3/lb. If the inlet suction line is 4 in. ID and the discharge line is 2.5 in. ID, determine (a) the change in flow work between the boundaries, ft-lb/min; (b) the mass rate of flow, lb/min; and (c) the change in velocity. Answer: (a) 324,000, (b) 15.88, (c) -12.9 fps

A water pump increases the water pressure from 15 psia to 80 psia. a. Determine the flow work, in Btu/lbm, required by the pump. Assume thatthe state of the water at pump inlet is saturated liquid and that the specificvolume remains constant during this process. b. Water enters this pump through a 1.5-in-diameter opening and exitsthrough a 2-in-diameter opening. Determine the velocity of the water at theinlet and outlet when the mass flow rate through the pump is 1.1 lbm/s

4. In a steady flow apparatus,135kJ of work is done by each kg of fluid. The specific volume of the fluid, pressure and speed at the inlet are 0.37 m3/kg, 600 kpa, and 16 m/s. The inlet is 32 m above the floor, and the discharge pipe is at floor level. The discharge conditions are 0.62 m3/kg,-100 kpa, and 270 m/s. The total heat loss between the inlet and discharge is 9kJ/kg of fluid. In flowing through this apparatus, does the specific internal energy increase or decrease, and by how much? Draw a figure or FBD that will support the problem. Explain each step by step formula.

The mass flow rate of the gas in a gas turbine is 40 kg/s. The specific enthalpy and velocity in the inlet are 1300 kJ/kg and 160 m/s respectively while the outlet are 350 kJ/kg and 50 m/s respectively. Calculate for the work of the turbine if there is a heat loss of 1000 kW. (kW)

b and c please

1. Steam flows into a turbine at the rate of 10 kg/s and 10 kW of heat are lost from the turbine. Ignoring elevation and kinetic energy effects, calculate the power output from turbine.

I need help with this problem

An air compressor takes in air at 128 kPa at the rate of 0.87 m^3/sec, and discharge 685 kPa. Determine the power of compressor in kW Answer in one decimal places

3. Air enters a gas turbine system with a velocity of 105 m/s and has a specific volume of 0.8mkg. The inlet area of the gas turbine system is 0.05m. At exit the air has a velocity of 135m/s and has a specific volume of L.5 m/kg. In its passage through the rurbine system the specific enthalpy of the air is reduced by 145kj/kg and the air also has heat loss of 27kj kg. Determine 7. 1. The mass flow rate of the air through the turbine system 2 The exit area of the turbine 3. The power developed by the turbine systenm