QH rejected into the outdoorCondenserExpansionExit: 1.2 MPa70°CvalveCompressor-WinInlet: 400 kPaEvaporatorsat. vap.QL removed from the rooom The computer, TV, lights and all the appliances inside a room generate heat 5 kW. In order to keepthe room at 23°C, an air-conditioner is used to remove the waste heat from all the appliances to theMEC 301 Thermodynamics, Fall 2024outdoor air at 37°C. Inside the air-conditioner, the refrigerant R-134a enters the compressor at 400kPa as a saturated vapor at a volume rate of 0.002 m³/s and leaves at 1.2 MPa and 70°C. Determine(a) The actual COP, (b) the maximum COP and (c) the minimum volume flow rate of therefrigerant at the compressor inlet.

Given: Assuming, Standard Vapour Compression CycleI hope this is helpful.

Answered: QH rejected into the outdoor Condenser…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Refrigerant 134-a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at 100 kPa with quality of 40 percent and leaves at 100kPa and -26 C as shown in Figure 2. If the compressor consumes 925 W of power and the COP of the refrigerator is 2.3 determine: The mass flow rate of the refrigerant The rate of heat rejected to the kitchen air
3) The cold water system in a house is equipped with a pump. 12 kg of water at 5000kPa and 2°C will enter the pump until the pressure rises 3 times and the temperature is 12°C with 3kJ of heat loss. Hot water will be heated in a heat exchanger before entering the mixing chamber. The heat exchanger uses air at 150°C to heat 3kg of 5°C of 5MPA water until 120°C. The temperature of the air will be dropped 10 times than before. Later, the cold water will enter the mixing chamber to be mixed with hot water until the pressure of the water becomes 10MPA. Evaluate : a) work of the pump b) isentropic efficiency of the pump c) mass of the air used to heat the water d) heat add in the hot water e) temperature of the water at the exit of the mixing chamber in °C.
53.4 lbm of air in a rigid container at 22 psia and 400 R absorbs 3.04127 kW*hr of energy from an electrical resistance heater. For this problem, account for variable specific heats, but do not interpolate. a) Assuming no heat transfer, determine: The final temperature: The final pressure: R psia b) if the final pressure were 51.700 psia, determine: The final temperature: The heat transferred: R Btu
At the beginning of a cycle using air, the pressure, volume and temperature are 550 kN/m 2 , 0.025 m 3 and 15°C, respectively. The air is heatedat constant pressure until the temperature is 204°C. It is then expanded adiabatically until the temperature becomes 120°C. The air is cooled atconstant volume to a temperature of 15°C then restored to its original volume by isothermal compression. (a) Draw the pressure volume and temperature entropy diagram.(b) Determine for the cycle, the heat received,(c) the work done,(d) the thermal efficiency, Take Cp =1.00 kJ/kgK, Cp /Cv =1.4
In a refrigeration plant there is a 10-Liter rigid tank that contains R-410A at -10°C, 80% quality. Electric work in the amount of 36 kJ is added to the R-410A, after which the R-410A temperature reaches 40°C. Calculate the heat transfer and determine if the heat transfer is to or from the tank during this process? Qualitatively draw the process in a p-v diagram.
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the initial mass (m1) in (kg) is A rigid 0.15 m³ tank contains air at 0.8 MPa, 200°C. A valve on the tank is now opened and air flows out until the pressure drops to 100 kPa. During this process, heat is transferred between tank and surrounding, such that when the valve is closed, the temperature inside the tank is 60°C. me valve Tank Air, V-0.15 m² P₁=0.8 MPa, T₁= 200 C P₂ = 100 kPa > T₂ = 60°C
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1. Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 300°C and 200 kPa while losing heat at a rate of 25 kW. For an inlet area of 800 cm?, determine the velocity and the volume flow rate of the steam at the nozzle exit. Determine the following: a. Velocity at the exit (m/s) b. Volume flow rate (m³/s) From steam table: h,=3267.7 kJ/kg h,=3072.1 kJ/kg 400°C 300°C 800 kPa Steam v,=0.39429 m /kg 200 kPa v,=1.3163 m /kg 10 m/s
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