Figure PZ55 and the accompanying table provide the schematic and steady-state operating data for a flash7.55chamber fitted with an inlet valve that produces saturated vapor and saturated liquid streams from a single entering streamof liquid water. Stray heat transfer and the effects of motion and gravity are negligible. Determine (a) the mass flow rate, inIb/s, for each of the streams exiting the flash chamber and (b) the total rate of exergy destruction, in Btu/s. Let To = 77°F, Po=1 atmState Condition T(°F) p(lbf/in.°) h(Btu/lb) s(Btu/lb R)liquid 30080269.710.43721.6996301164.32 sat. vapor3 sat. liquid218.90.3682302Saturated vaporP2=30 lbf/in.2Flash chamberValve=100 lb/sT 300°FP=80 lbf/in.2Saturated liquid,A+P3=30 lbf/in.23FIGURE P7.55

Answered: Figure PZ55 and the accompanying table…

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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The water vapor enters a throttling valve with a mass flow rate of 2.7 kg/s, a temperature of 280 °C and a pressure of 30 bar, and undergoes a throttling process up to 20 bar. Determine the flow exergy and exergy extinction at the inlet and outlet of the throttling valve in kW. dead state; T0=25° C, P0=1 atm
Define the Mechanisms of exergy transfer.
A domestic water heater holds 189 L of water at 60°C, 1 atm. Determine the exergy of the hot water, in kJ. To what elevation, in m, would a 1000-kg mass have to be raised from zero elevation for its exergy to equal that of the hot water? Let T0 = 298 K, p0 = 1 atm, g = 9.81 m/s2 .
Apply exergy balance to closed systems and control volumes.
Steam enters a turbine operating at steady state with a mass flow of 10 kg/min, a specific enthalpy of 3100 kJ/kg, and a velocity of 30 m/s. At the exit, the specific enthalpy is 2300 kJ/kg and the velocity is 45 m/s. The elevation of the inlet is 3 m higher than at the exit. Heat transfer from the turbine to its surroundings occurs at a rate of 1.1 kJ per kg of steam flowing. Let g = 9.81 m/s2. Determine the power developed by the turbine, in kW.
At steady state, an electric pump motor develops power along its output shaft of 0.7 hp whiledrawing 6 amps at 100 V. The outer surface of the motor is at 150°F. Let T = 40°F.Determine:(b) the exergy flow with input power, exergy flow with output power, magnitude of exergy flowwith heat transfer leaving the motor, and exergy destruction, all in Btu/h.
(1) Air enters the compressor of a regenerative gas-turbine engine at 300 K and 100 kPa, where it is compressed to 800 kPa and 580 K. The regenerator has an effectiveness of 75 percent, and the air enters the turbine at 1200 K. For a turbine efficiency of 84 percent, determine (a) the amount of heat transfer in the regenerator and (b) the thermal efficiency. Assume variable specific heats for air. (2) Determine the exergy destruction associated with each of the processes of the Brayton cycle described in the problem above, assuming a source temperature of 1200 K and a sink temperature of 300 K. Also, determine the exergy of the exhaust gases at the exit of the regenerator. Take Pexhaust = P0 = 100 kPa. qreg= 167.24 KJ/Kg , thermal efficiency is 34.9%
Exergy flow associated with a fluid stream when the fluid properties are variable can be determined by.
Define the exergy destruction, which is the wasted work potential during a process as a result of irreversibilities.
Define the Exergy Transfer by Mass, m.
A well-insulated turbine operating at steady state develops 29.7 MW of power for a steam flowrate of 45 kg/s. The steam enters at 25 bar with a velocity of 48 m/s and exits as a saturated vapor at 0.06 kPa with a velocity of 139 m/s. Neglecting potential energy effects, determine the inlet enthalpy in kJ/kg to the tenths place. I am fairly certain that the base equation is... H1=(Ws/m)+H2+((V2^2-V1^2)/2) ...but I do not know how to get the value of H2?
Explain into details why thermodynamics depends on the entropy?

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