Q2. A steam generation unit in power plant operates at a constant pressure of (10 bar) and the water evaporates at the rate of (700kg /h). Inlet and leaving water enthalpy are (130kj/kg) and (2000kj/kg) respectively. The inlet and outlet velocity are (10 m/s) and (25m/s) respectively. Determine the work done and the heat evaporation if the inlet and outlet diameter from steam generation unit are the same level.

Q2. A steam generation unit in power plant operates at a constant pressure of (10 bar) and the water evaporates at the rate of (700kg /h). Inlet and leaving water enthalpy are (130kj/kg) and (2000kj/kg) respectively. The inlet and outlet velocity are (10 m/s) and (25m/s) respectively. Determine the work done and the heat evaporation if the inlet and outlet diameter from steam generation unit are the same level.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 30RQ: A gas is compressed inside a compressor's cylinder. When the piston is at its bottom dead center,...

See similar textbooks

Similar questions

An ammonia refrigeration compressor takes its suction from the evaporator, at a temperature of-200F and a quality of 95%. The compressor discharges at a pressure of 100 psi, liquid ammonia leaves the condenser at 500F.(a)Determine the heat absorbed by the evaporator in kJ/kg. (b)Determine the heat rejected to the condenser in kJ/kg. (c)Determine the COP. (d)Determine the horsepower per ton of refrigeration. (e)Determine the quality of refrigerant upon entering to the evaporator
A furnace heats water at a saturated state with a pressure of 1 bar. How much heat is given When the water condition in the tank is 15 bar and 500°C. Specify: a) Heat needed? b) Internal changes in energy? c) Work done?
A gas cylinder with interior volume 11.6 L holds compressed air at 17.4 MPa. The cylinder is joined by a hose of negligible volume to a second cylinder that’s been pumped down to vacuum. When the valve on the full cylinder is opened, the air expands to fill the entire system, all the while maintaining a constant temperature. If the energy that becomes unavailable to do work is 171.8 kJ, what’s the volume of the second cylinder (L)?
Refrigerant 134a enters an evaporator as a saturated liquid at 4bars and exits as a superheated vapour at 60degrees Celsius. If 85.9kW of heat is absorbed by the refrigerant, what is the mass flow rate in kg/s?
A refrigerated compartment is maintained at a temperature of -5°C. Heat from the surroundings, at 25°C, leaks into the compartment at a rate of 1.2 kW. Find the compressor power required to maintain the temperature difference for the following scenarios:
A steam power plant has a high pressure of 2.5 MPa after release from the pump and it maintains 40°C in the condenser. The quality of the stream exiting the turbine is 80%. Solve for the work produced by the turbine and the pump, the heat transfer in the boiler, and heat removed by the condenser. (Answer in kJ/kg)
A reciprocating compressor draws in 500 cubic feet per minute of air whose density is 0.079 lb/cu ft and discharges it with a density of 0.304 1b/cu R. At the suction, P, = 15 psia; at discharge, P, = 80 psia. The increase in the specific internal energy is 33,8 Btu/b and the heat transferred from the air by cooling is 13 Btu/b. Determine the work on the air in Btu/min and in hp. Neglect change in kinetic energy.
200Kg/min superheated steam at 40 bar and 350C enters a turbine through a 7.5cm ID pipe. It exits at 5bar as saturated steam through a 5cm ID pipe neglect the change in potential energy of the system. What is the temperature of the outlet saturated system? How much energy is transferred to or from the turbine?
A soup is set to boil. When the soup reaches 170°F, remove it from the heat and set it on the kitchen counter. The air in the kitchen is 80°F, and the soup in the bowl is 120°F after two minutes. After removing the soup from the heat, how long will it be 90°F?
Steam enters a turbine with an enthalpy of 1292 Btu/lb and leaves with an enthalpy of 1098 Btu/lb. The transferred heat is 13 Btu/lb. What is the work in Btu/min and in hp for a flow of 2lb/sec?
Air at 15 degree Celsius and 95 kpa enters the diffuser of a jet engine and steadily with a velocity of 250 m/s. The inlet area of the diffuser is 0.5 m^2. The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Find the mass flow of air, temperature of air leaving diffuser, power and rate of heat transfer within diffuser.
The pressure of the air in a starting vessel is 40 bar and the temperature is 24°C. If a fire in the vicinity causes the temperature to rise to 65 °C. Neglect anyincrease in the volume of the vessel which is 5 liters. determine the: a. work nonflow and heat transferred