430 Refrigerant 134a enters a heat exchanger operating ai steady state as a superheated vapour at 10 bars. 60°C. where it is cooled and condensed to saturated liquid at 10 bars. The mass flow rate of the refrigerant is 10 kg/min. A separate stream of air enters the heat exchanger at 37°C with a mass flow rate of 80 kg/min. Ignoring heat transfer from the outside of the heat exchanger and neglecting kinetic and potential energy effects, determine the exit air temperature, in *C.

430 Refrigerant 134a enters a heat exchanger operating ai steady state as a superheated vapour at 10 bars. 60°C. where it is cooled and condensed to saturated liquid at 10 bars. The mass flow rate of the refrigerant is 10 kg/min. A separate stream of air enters the heat exchanger at 37°C with a mass flow rate of 80 kg/min. Ignoring heat transfer from the outside of the heat exchanger and neglecting kinetic and potential energy effects, determine the exit air temperature, in *C.

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

A well-insulated turbine operating at steady-state produces 5 MW power for a steam flow rate of 10kg/s. The steam enters at 300C with the velocity of 35m/s, and exits as a saturated vapor at 1 bar with velocity of 100 m/s. There is no potential energy change. Determine: a.The inlet pressure b.Exit temperature c.Volumetric flow rates at the inlet and exit. Please show all steps in solution
As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lb/in² and is compressed to 160°F, 200 lb/in². The refrigerant exiting the compressor enters a condenser where energy transfer to air as a separate stream occurs, and the refrigerant exits as a liquid at 200 lb/in², 90°F. Air enters the condenser at 70°F, 14.7 lb-/in² with a volumetric flow rate of 1500 ft³/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and assume ideal gas behavior for the air. Step 1 I₁-110°F Compressor 1+ R22 at MR22 = www www T₂-160°F P₁-200 lbfin.² Condenser Air at T₁ P4-14.71bfin.² (AV), 7₁-90°F P-200 lbf/in² T₁=40°F Pi-80 lbfin.² Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. Determine the mass flow rate of refrigerant, in lb/min. lb/min T₂ <- 60°F T₁ = 90°F T₁ = 40°F Pa = Pa = 200 bin² P-801brin²
4.4 In a gas turbine, combusted gas with a volumetric flow rate of 0.5 m³/s expands from 50 bar, 650°C to 4 bar. The turbine generates 5 MW of power and rejects 200 kJ/min of heat to the surrounding. Neglecting the change of kinetic and potential energies and assuming that the cross-sectional area of the inlet and outlet to be the same, determine: a) the mass flow rate (kg/s) in b) the gas temperature at outlet (°C) c) the ratio of outlet to inlet velocities d) the volumetric flow rate at outlet (m³/s). Take the value of cp and k of the gas to be 1.15kJ/kg.K and 1.3 respectively. Cp = 1·15kJ/kg, k K = 1.3
pls answer correctly the given
A rigid tank whose volume is 0.5 m³, initially containing ammonia at 20°C, 1.5 bar, is connected by a valve to a large supply line carrying ammonia at 12 bar, 130°C. The valve is opened only as long as required to fill the tank with additional ammonia, bringing the total mass of ammonia in the tank to 136.7 kg. Finally, the tank holds a two-phase liquid-vapor mixture at 20°C. Determine the heat transfer to the ammonia in the tank from the surroundings, in kJ, ignoring kinetic and potential energy effects. lev = eTextbook and Media Hint ! kJ.
As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lbp/in² and is compressed to 160°F. 200 lb/in?. The refrigerant exiting the compressor enters a condenser where energy transfer to air as a separate stream occurs, and the refrigerant exits as a liquid at 200 lb/in², 90°F. Air enters the condenser at 75°F, 14.7 lb/in² with a volumetric flow rate of 1000 ft3/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and assume ideal gas behavior for the air. Step 1 Compresser 1+R22 Hint Step 2 mg22 = 7.026 7-11 wwwww www Wa= 7₂=160 F P-200 7₁-4FF P-80² Your answer is correct. Determine the mass flow rate of refrigerant, in lb/min. Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. * Your answer is incorrect. 2.125 -Condemer lb/min Determine the compressor power, in horsepower. Aus at T P 1471² (AV) 7₁-90°F Py = 200 m² hp P == 300…
Air as an ideal gas flows through a diffuser at steady State. At thne inlet , the air enters at 290°K, 3 bar, and 512 m/ Sec. At the exit, the air Speed is 110 m/saec, if the diffuser operates wentropically, determine the exit pressure using a constant specific heat ratio of 1.40 in bar using. 5 Signifigant figures.
Water vapor with a pressure of 160 bar and a temperature of 480°C enters a stable turbine with a volumetric flow of 800 m3/min. About 18% of the incoming mass flow exits a part of the turbine at a pressure of 5 bar, a temperature of 240°C and a velocity of 25 m/s. The rest comes out from another part of the turbine with a pressure of 0.06 bar, a quality of 94% and a speed of 400 m/s. Determine the diameters of each outlet channel in m.
As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lb;/in? and is compressed to 160°F, 200 Ib;/in?. The refrigerant exiting the compressor enters a condenser where energy transfer to air as a separate stream occurs, and the refrigerant exits as a liquid at 200 Ib:/in?, 90°F. Air enters the condenser at 70°F, 14.7 lb:/in? with a volumetric flow rate of 750 ft/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and assume ideal gas behavior for the air. Condenser Air at T P4=14.7 1bf'in.? (AV), 5 4 wwww T I; =110°F 3 p2 = p3 = 200 ib/in = 60°F T,= 160°F P2= 200 lbfin. T3- 90'F P=200 Ibf/in2 T3 = 90°F pi = 80 lbrin? T1 Compressor = 40°F 1+ R22 at Iz = 40°F Pi - 80 Ibf/in.? Determine the mass flow rate of refrigerant, in Ib/min, and the compressor power, in horsepower.
8
Air at 1 bar, 27 °C, with a volumetric flow rate of 40 m³/min enters the non-mixing counterflow heat exchanger part of an air-conditioning system. This air exits the heat exchanger at 0.95 bar and 17 °C. The cooling of this air is done by a stream of refrigerant R-134a that enters the heat exchanger at 5 bar with a quality of 0.3 and exits at 5 bar and 20 °C. Determine the overall rate of entropy production during this process, in kW. The overall heat exchanger is insulated. The operation is steady state, and the effects of potential and kinetic energy are negligible.