Part A-Classical Type of QuestionsQ1) In an ice-making plant, water at 0 °C is frozen at atmospheric pressure by evaporating saturatedR-134a liquid at -26 °C. The refrigerant leaves this evaporator as a saturated vapor, and the plant issized to produce ice at 0 °C at a rate of 3500 kg/h.-26°Csat. vaporR-134a-26°C(a) Show the entropy balance for the process(b) Determine the rate of heat transfer(c) Calculate the mass flow rate of refrigerant R-134a(d) Determine the rate of entropy generation in this plant(e) Show the process on a T-s diagram for R-134a with respect to saturation lines (Please show therelated values of the parameters in the diagram)

Answered: Image /qna-images/answer/4cac3556-6204-4595-8700-99d5ab92a7ab.jpg

Q1) In an ice-making plant, water at 0 °C is frozen at atmospheric pressure by evaporating saturated R-134a liquid at -26 °C. The refrigerant leaves this evaporator as a saturated vapor, and the plant is sized to produce ice at 0 °C at a rate of 3500 kg/h.

Q1) In an ice-making plant, water at 0 °C is frozen at atmospheric pressure by evaporating saturated R-134a liquid at -26 °C. The refrigerant leaves this evaporator as a saturated vapor, and the plant is sized to produce ice at 0 °C at a rate of 3500 kg/h.

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

Given: P3 = 4 kPa, x3 = 0.6 , P4 = 4 kPa, T1 = 25 oC, T2 = 35 oC, mdot_steam = 25 kg/s. Find mdot_water (kg/s).mdot_water = _________ kg/s.
Calculate the energy requirement to raise the temperature of 1 kg of water from 60 ° C of water to 100 ° C using the following approach; a. Use of mean specific heat = .... kJ. b. Enthalpy change in water - vapor saturation table = .... kJ.
Calculate the compressor work in kJ required to compress 1 kg of an ideal gas from an initial volume and pressure of 0.65m3 and 101.3kpa to a final pressure of 517kpa. Compression is with n=1.35. A. 133.6 B. 105.8 C. 148.3 D. 142.7
Example (7.2): A rigid tank with volume of 1 m³, contains air with 300 kPa and 300°C heated by external heart source. The valve is open allowed to part of air exit to the surrounding according to the relation of PV" = constant, then the valve is close when the final pressure in tank reaches to 100 kPa. Determine the heat transfer to the tank. Assuming n = 1.2.
A thermal power plat uses boiler which evaporates 3500 kg of water at 42.5° C into superheated steam at a pressure of 12.5 bar and 275° C. The boiler consumes 500 kg of coal per hour to produce steam. Assume the specific heat of superheated steam as 2.1 kJ/kgK and the calorific value of coal is 32760 kJ/kg. Determine equivalent evaporation "from and at 100° C" and thermal efficiency of the boiler. Use the following steamtable for required values: Saturation Properties Temperature Table hf kJ/kg 171.63 hg kJ/kg 2576.2 hfg kJ/kg t °C bar 41 0.07777 2404.5 42 0.08198 175.81 2575.9 2402.1 43 0.08639 179.99 2590.1 2399.7 10 184.17 31.5 97.3 45 0.09582 188.35 2583.3 2394.9 Saturation Properties Pressure Table hf kJ/kg hg kJ/kg hfg kJ/kg 1998.5 t bar °C 11.0 184.07 781.12 2779.7 12.0 187.96 798.43 2782.7 1984.3 13.0 191.61 814.70 2785.4 1970.7 14.0 195.04 830.07 2788.9 1951.4 15.0 198.29 844.66 2789.9 1945.2
Calculate the energy requirement to raise the temperature of 1 kg of water from 60 ° C of water to 90 ° C using the following approach; a. Average specific heat usage (Tab A Singh's Book. 4.1) = kJ b. The enthalpy change in the water - vapor saturation table (Tab A Singh's Book. 4.2) = kJ
Problem: Identify the Enthalpy of State 1 to 4 (h1, h2, h3 and h4)Note: Point 2 and 4 are saturated.Process 1-2 IsometricProcess 2-3 IsothermalProcess 3-4 IsometricProcess 4-1 Isothermalwhere: at point1; Entropy = 9 KJ/Kg-K and Pressure = 0.64 MPaat point3 X=0.2
2) Two glass bulbs, one on the left with a volume of 2 liters and the other on the right with avolume of 6 liters, are connected to one another by a thin tube that is initially closed by astopcock. The bulb on the left has 0.1 moles of ideal gas, and the bulb on the right isevacuated. The system is in thermal equilibrium with the surroundings at 300K. When thestopcock is opened, the gas flows out to fill both bulbs. Calculate A for this process. If wewere to insert a propeller to extract work as the gas flows from left to right, what is themaximum amount of work that we could possibly extract?
Air as an ideal gas is contained in a piston/cylinder system constrained by a non-linear spring. Initially the gas in the cylinder is at 100 kPa, which is balanced by the atmospheric pressure outside of the cylinder (the weight of the piston is negligible). The force on the spring at the start is zero. The spring force is F=kx². k=600. kNt/m². The cross-sectional area of the piston is 1 m², the initial volume is 1 m³, and the initial temperature is 300 K. Heat is added until the volume of the gas has expanded to 1.5 m³. Find: (a) The work done by the gas on the face of the piston (kJ). (b) The final temperature (K). (c) The amount of heat added (kJ). Hint: This problem is easiest if you calculate the spring work and the atmospheric work separately. Air V₁=1.0 m³ Piston Area = 1.0 m² T₁=300 K P₁=100 kPa Atmospheric P on upper piston face= 100 kPa
Q3: In a steam jacket cylinder, steam expands from 5 bar to 0.12 MPa according to a law pv1.05 = constant. Assuming that initial dryness fraction is 90%, calculate the work done and heat supplied for 0.5 kg of steam during the expansion.
One cubic meter of oxygen at initial pressure of 1 bar and a temperature of17°C are compressed isentropically to a volume of 0.50m 3 . Use the specificheat at constant volume and pressure are 0.919 kJ/kgK and 0.659 kJ/kgK,respectively. determine the: b. the pressure, temperature, and volume after the process d. work nonflow and heat transferred
I need help with this thermo practove problem that I do not understand- thank you! 2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cyclemade up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Fill out the processes table below. Calculate Processes 1-2, 2-3, and 3-1 clearly