the turbine at 1 MPa and 300°C. It exits the turbine at 500 kPa, saturated vapor. The steam is then cooled down to saturated liquid at 500 kPa by cooling water flowing in at 35 °C and out at 85 °C of the condenser. The needed power of the pump is 11.071 MW. The steam is pumped into a throttling device back to the boiler. The mass flow rate of steam circulating the condenser is 100 kg/s. Determine the following: a. Turbine work in MW b. Heat rejected from the condenser in MW c. Mass flow rate of cooling water in kg/s d. Inlet boiler temperature in °C e. Heat added in the boiler in MW Qboiler Isobaric Boiler P1= 1MPA T1= 300°C 11.071 MW Tur

the turbine at 1 MPa and 300°C. It exits the turbine at 500 kPa, saturated vapor. The steam is then cooled down to saturated liquid at 500 kPa by cooling water flowing in at 35 °C and out at 85 °C of the condenser. The needed power of the pump is 11.071 MW. The steam is pumped into a throttling device back to the boiler. The mass flow rate of steam circulating the condenser is 100 kg/s. Determine the following: a. Turbine work in MW b. Heat rejected from the condenser in MW c. Mass flow rate of cooling water in kg/s d. Inlet boiler temperature in °C e. Heat added in the boiler in MW Qboiler Isobaric Boiler P1= 1MPA T1= 300°C 11.071 MW Tur

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

It is desired to heat cold water at a pressure 500 kPa from 5 oC to 50 oC at a rate of 0.1 kg/s in a thin-walled copper tube by condensing waste process steam at 300 kPag on the outside of the tube. At 400 kPa abs, T sat = 143 oC. Determine the log mean temperature difference.
Question 3 Consider the turbocharger of an internal combustion engine. The exhaust gases enter the turbine at 450°C at a rate of 0.02 kg/s and leave at 400°C. Air enters the compressor at70°C and 95 kPa at a rate of 0.018 kg/s and leaves at 135 kPa. The mechanical efficiency between the turbine and the compressor is 95 percent (5 percent of turbine work is lost duringits transmission to the compressor). Using air properties for the exhaust gases, determine:(a).The turbine power output, compressor power input, air temperature at the compressor exit,(b).The air temperature at the compressor for the case of isentropic process and isentropic efficiency of the compressor.
A commercial airliner is flying at an altitude where the temperature and pressure of the air are -50°C and 26.5 kPa. An engine-driven compressor will take this air at T= -50°C, P₁ = 26.5 kPa and compress it to P₂ = P₂ = 85.0 kPa to pressurize the cabin. The air will be very hot when it exits the compressor, so a heat exchanger will be used to cool the air to T, = 20°C before it enters the cabin. Cold air at T₁ = -50°C will be used in the heat exchanger to cool the cabin air, and this air will exit the heat exchanger at T = 20°C (this air will be used to heat the cargo bay). The mass flow rate of the air delivered to the cabin is 0.80 kg/s and the compressor efficiency is 75%. Model the air as an ideal gas having constant specific heat, using 300 K values from Cengel's tables posted on Canvas. a) Find the actual temperature of the air exiting the compressor and the power input to the compressor (answers: 67.6°C and 94.5 kW). b) Find the rate of heat transfer in the heat exchanger and…
Refrigerant 134a enters a compressor at 1.0 bar asa saturated vapor with a mass flow rate of 0.9 kg/min andleaves at 8.0 bar. The heat rejected from the refrigerantduring the compression process is 140 kJ/min. If thepower supplied to the compressor is 3.0 kW, what is thetemperature of R-134a at the exit of the compressor?
CO2 is needed in a surgical suite for abdominal laparoscopic surgery. You have already designed a nozzle to step down the pressure from the gas cylinder to the delivery hose. The well-insulated delivery hose has a 2.2 mm inner diameter. The inlet conditions to the delivery hose are 103 psia and 17°C. Typically, the surgeon uses 4 to 6 L/min of gas at pressures between 10 to 20 mm Hg to inflate the peritoneal cavity; however, the delivery system must be able to provide flow rate of 17.5 L/min at 20.0 mm Hg for safety. The surgeon will use a pin valve to control the flow rate and maintain the operating space. The gas temperature should not be any colder than 10°C when delivered to patient, or tissue damage might occur. Determine the acceptable delivery hose length to meet the surgical criteria. State assumptions.
blait (Q3) Refrigerant-134a enters a compressor at 180 kPa and 50°C at a rate of 195 m³/s and leaves at a pressure of 800 kPa The refrigerant experiences a heat loss through the casing to the surrounding at a rate of 2 kJ/kg. The power input to the compressor is 410 kW. Determıne (a) the mass flow rate of the refrigerant and (b) the exit temperature. R-134a
Air (MW=29 g/mol) at 115.00 kPa and 285.00 is compressed steadily to 600.0 kPa. The mass flow rate of the air is 2.00 kg/s and a heat loss of 32.1 kW occurs during the process. You may assume that changes in kinetic and potential energy are negligible, the temperature of the surroundings is 25 ∘C, and that the CP of air is 3.5 R. Given the compressor operates with a second law (reversible) efficiency of 0.60,calculate the following. What is the actual work interaction term in kW? What is the actual exit temperature of the air in Celcius?
Steam at a rate of 200 kg/min enters a turbine at 350°C and 40 bar through a 7.5-cm internal diameter pipe. The turbine operation is adiabatic, and the effluent leaves as saturated water at 5 bar through a 5-cm diameter pipe. 1. Calculate the work produced by the turbine in kW. 2. What is the enthalpyand phase of the effluent stream? 21 If it leaves the turbine at 75C and 5 bar 22 If it leaves the turbine at 30C and 5 bar 7.5
Problem 4 A 0.15-m rigid tank initially contains R-134a as saturated vapor R-134a at 0.6 MPa. The tank is connected by a valve to a supply line that carries R-134a at 1 MPa and 26°C. The valve is now opened, allowing the refrigerant to enter the tank, and is closed when it is observed that the tank contains only saturated liquid at 0.8 MPa. Neglecting kinetic and potential energy changes, determine, 1 MPa 26°C R-134a 0.15 m a) The mass of the refrigerant that entered the tank, in kg b) The amount of heat transfer to or from the surroundings in kJ
1. Steam at a pressure of 2MPA and temperature 300°C is passed at a constant rate into a desuperheater unit. The desuperheater is accomplished by continuously spraying water at 95 °C onto incoming superheated steam. The amount of water injected is so regulated that both the water and superheated steam finally change into dry steam at 2 MPa. If the resulting mixture of dry saturated steam leaves the desuperheater at 2MPA and the rate of I kg/s, find the mass of superheated steam used per hour and the mass of water to be injected per hour. Fond also the diameter of the pipe through which the superheated steam flows to the superheater if the speed of the steam through the pipe is not to exceed 25m/s..
4- Consider a water mixer operating at constant pressure, receiving water at the first inlet at I MPa and 30 °C and superheated vapor at the second inlet at I MPa and 300 °C. If the required exit temperature is 120 °C, determine the mass flow ratio of the two inlets.
Refrigerant-134a at 1 MPa and 908C is to be cooled to 1 MPa and 308C in a condenser by air. The air enters at 100 kPa and 278C with a volume flow rate of 600 m3/min and leaves at 95 kPa and 608C. Determine the mass flow rate of the refrigerant. V₂ = 600 m³/min |P3= 100 kPa| T3 = 27°C R-134a P₁ = 1 MPa T₁ = 90°C ₪ | P4 = 95 kPa T₁ = 60°C P₂ = 1 MPa T₂ = 30°C