SteamCEREKJ-Valve Control volume boundaryTurbineInitiallyevacuatedtankIn case of emergencies, a turbine is connected to an active steam pipe line using a valve. When the valve is opened, steam from the pipe line, which is initially at 550°C and 10 MPa, flows through the turbine into a 0.64 m³ tank, which is initially evacuated. The valve is closedwhen the pressure inside the tank is 1.6 MPa and the temperature in the tank is 300°C. If the entire process is completed adiabatically, what is the amount of work generated from the turbine?

Answered: Image /qna-images/answer/e96c9e32-c3ac-410f-b7d9-e4e45b5d0f46.jpg

Answered: Steam Turbine KJ Initially evacuated…

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

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Refrigerant R-134a to the compressor of a refrigeration machine It enters at 140 kPa pressure and -10 °C, and exits at 1 MPa pressure. Volumetric flow of the refrigerant entering the compressor It is 0.23 m³/minute. The refrigerant enters the throttling valve at a pressure of 0.95 MPa and at 30 °C, and exits the evaporator as saturated steam at -18 °C. Adiabatic efficiency of the compressor It is 78%. Show the cycle in the T-s diagram. And; a) Calculate the power required to run the compressor. b) Calculate the heat absorbed per unit time from the cooled medium. ( COPSM=? ) c) Calculate, between the evaporator and the compressor, how much the pressure of the refrigerant drops and how much the heat gain.
A gas flows steadily through a rotary compressor at a temperature of 16 ⁰C, a pressure of 100kPa, and an enthalpy of 392.2 kJkg-1. The gas leaves the compressor at a temperature of 245⁰C, a pressure of 0.6 MPa and an enthalpy of 534.5 kJkg-1. There is no heat transfer to or fromthe gas as it flows through the compressor. Using the steady flow equation appropriate toeach case, evaluate the external work done per unit mass of gas: a) when the inlet and exit velocities of the gas are negligible b) when the inlet velocity of the gas is 80 ms-1 and the exit velocity of the gas is 160 ms-1.
Thermodynamics Refrigerant R-134a to the compressor of a refrigeration machine It enters at 140 kPa pressure and -10 °C, and exits at 1 MPa pressure. Volumetric flow of the refrigerant entering the compressor It is 0.23 m³/minute. The refrigerant enters the throttling valve at a pressure of 0.95 MPa and at 30 °C, and exits the evaporator as saturated steam at -18 °C. Adiabatic efficiency of the compressor It is 78%. Show the cycle in the T-s diagram. And; a) Calculate the power required to run the compressor. b) Calculate the heat absorbed per unit time from the cooled medium. ( COPSM=? ) c) Calculate, between the evaporator and the compressor, how much the pressure of the refrigerant drops and how much the heat gain.
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5 kg/sec of steam enters the condenser at 0.10 mpa and 88% quality. The cooling water enters @ 33C and leaves at 39C. Determine the volume flow of the cooling water in the liters per minute at the inlet
Air (R = 0.3074 psia.cf/lbm.R) is compressed from 14.7 psia and 60°F to a pressure of 150 psia while heat loss rate during the steady compression is 10 Btu/lbm. The volume flow rate of the air at the inlet is 5,000 ft'/min and the power input to the compressor is 700 hp. Determine the temperature at the compressor exit in °F. (1hp = 0.7068 Btu/s) AIR %3D 10 Bru Ibm
In a refrigerator the pressure in the evaporator us 2.72 kg/cm sq. and the refrigerant entry is 0.12 dry while at the exit 0.91 dry. During the compression, the work done per kg is 17,033 kg-m/kg. Calculate the COP. The rate of refrigerant circulation is 5.64 kg/min. The given latent heat and specific volume at 2.72 kg/cm sq are 320 kcal/kg ang 0.436 cu m/kg.
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Refrigerant 22 at a pressure of 1500 kPa leaves the condenser and rises vertically11 m to the expansion valve. The pressure drop due to friction in the liquid line is21 kPa. In order to have no vapor in the refrigerant entering the expansion valve,what is the maximum allowable temperature at that point?
Q3/ A rigid, insulated tank that is initially evacuated is connected through a valve to a supply line that carries steam at 1 MPa and 300°C. Now the valve is opened, and steam is allowed to flow slowly into the tank until the pressure reaches 1 MPa, at which point the valve is closed. Determine the final temperature of the steam in the tank. Assumptions 1 This process can be analyzed as a uniform-flow process since the properties of the steam entering the control volume remain constant during the entire process. 2 The kinetic and potential energies of the streams are negligible, KE=PE= 0. 3 The tank is stationary and thus its kinetic and potential energy changes are zero; that is, AKE = APE = 0 and AEsystem =AUsystem. 4 There are no boundary, electrical, or shaft work interactions involved (W=0). 5 The tank is well insulated and thus there is no heat transfer (Q=0).
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.
An auditorium is designed to seat 4500 people. The ventilation rate is 1.62 x 107 ft3/hr of outside air. The outside temperature is 0oF dry bulb, and outside pressure is 14.6 psia. Air leaves the auditorium at 70oF dry bulb. There is no recirculation. The furnace has a capacity of 1,250,000 Btu/hr. The temperature at which the air should enter the auditorium is most nearly

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