T-8 The figure belows shows three components of an air-conditioning system, where 73= 115°F and m3 = 4.5 lb/s. Refrigerant 134aflows through a throttling valve and a heat exchanger while air flows through a fan and the same heat exchanger. Data for steady-stateoperation are given on the figure. There is no significant heat transfer between any of the components and the surroundings. Kineticand potential energy effects are negligible.Saturated liquid R-134amyThrottlingvalvelb/sP₁= 60 lbf/in.²AirT₁=535°R= 0.240 Btu/lb-"RFanwwwwwwwT₂=528°R-2W=-0.2 hpSaturated vaporPs= P4Modeling air as an ideal gas with constant cp = 0.240 Btu/lb. °R, determine the mass flow rate of the air, in lb/s.-Heat exchanger

Given-Information:- The temperature of saturated liquid, T3 = 115°F Mass Flow Rate of the Saturated…

Answered: ough a throttling valve and a heat…

ough a throttling valve and a heat exchanger while air flows t are given on the figure. There is no significant heat transfer tial energy effects are negligible.

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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solve the following problem: Steam enters a turbine operating at steady state at 850oF and 450 lbf/in2 and leaves as a saturated vapor at 1.4 lbf/in2. The turbine develops 12,000 hp, and heat transfer from the turbine to the surroundings occurs at a rate of 2 x 106 Btu/h. Neglect kinetic and potential energy changes from inlet to exit. Determine the exit temperature, in oF, and the volumetric flow rate of the steam at the inlet, in ft3/s.
Assume 9.84 lb/sec of fluid enter a steady-state, steady-flow system with P₁ = 107.18 psia, p₁ = 0.379 lb/ft³, u₁ = 94.7 fps, u₁ = 793.87 BTU/lb, and leave with P2 = 28.47 psia, p2 = 0.122 lb/ft³, u2 = 450.93 fps, and u2 = 750.79 BTU/lb. During the passage through the open system, each pound rejects 10.6 BTU of heat. Determine the work in hp.
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The Figure shows a solar collector panel embedded in a roof. The panel, which has a surface area of 24 ft2, receives energy from the sun at a rate of 200 Btu/h per ft2 of collector surface. Twenty-five percent of the incoming energy is lost to the surroundings. The remaining energy is used to heat domestic hot water from 90 to 120°F. The water passes through the solar collector with a negligible pressure drop. Neglecting kinetic and potential effects, determine at steady state how many gallons of water at 120°F the collector generates per hour.
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As shown in the figure, an air conditioner operating at steady state maintains a dwelling at 70°F on a day when the outside temperature is 90°F. The rate of heat transfer into the dwelling through the walls and roof is 30,000 Btu/h and the net power input to the air conditioner compressor is 3 hp. Determine a. the coefficient of performance for the air conditioner b. power input required in hp c. coefficient of performance for a reversible air conditioner providing the same cooling effect while operating between the same cold and hot temperatures.
Steam enters the condenser of a vapor power plant at 0.60 bar with a quality of 0.90 and condensate exits at 0.60 bar and 33°C. Cooling water enters the condenser in a separate stream as a liquid at 24°C and exits as a liquid at 36°C with no change in pressure. Heat transfer from the outside of the condenser and changes in the kinetic and potential energies of the flowing streams can be ignored. For steady-state operation, determine the energy transfer from the condensing steam to the cooling water, in kJ per kg of steam passing through the condenser. Select one: a. -2900.16 kJ/kg b. -2105.36 kJ/kg c. -2285.81 kJ/kg d. 2276.70 kJ/kg
Steam enters the condenser of a vapor power plant at 0.60 bar with a quality of 0.90 and condensate exits at 0.60 bar and 33°C. Cooling water enters the condenser in a separate stream as a liquid at 24°C and exits as a liquid at 36°C with no change in pressure. Heat transfer from the outside of the condenser and changes in the kinetic and potential energies of the flowing streams can be ignored. For steady-state operation, determine the energy transfer from the condensing steam to the cooling water, in kJ per kg of steam passing through the condenser.