the rate at which heat is extracted from the refrigerated space.
Q: Q2 / Heat is transferred from a tank of water in a refrigerator at(OC) degrees to a tank of boiling…
A: GivenT1=0oC=273KT2=100oC=373KQ2=2254 kJ
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A: Write the given data. For air,P1=96.8 kPaT1=25 °CP2=485 kPaT2=139 °CV˙a=0.15 m3/sFor water,m˙w=11…
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Q: A Carnot engine has an efficiency 50% when its sink is at a temperature of 27°C. The temperature of…
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Q: kJ/kg then the specific net work output of the cycle is
A: Given data; P1=100kPaT1=300 Kmep=1000kPaγ=1.4efficiency (η) =0.5R=0.287 KJ/Kgk we have to find net…
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Q: am is flowing through an adiabatic throttling valve (no heat loss or external work). Steam enters…
A: Given:At state 1, P1=689 kPa absoluteT1=171.1o CP2=359 kPa
Q: A refrigerating system has a refrigerating effect per kilogram of 220kJ. The heat to be removed is…
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Q: alculate the theoretical power required to operate the compressor.
A: GIven: RE= 10 tons Ph= 750 kPa Pl=210 kPa To determine: power required to operate the compressor
Q: 3) If the measurement parameters of a refrigeration machine are known, the amount of heat for liquid…
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Q: The thermal efficiency of a heat engine operating according to the Carnot cycle is 28% and water…
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Q: A household freezer operates in a room at 20 C. Heat must be transferred from the cold space at a…
A: heat transfer =2KW lowest temp =-30C highest temp = 20C
Q: A simple closed cycle gas turbine plant receives air at 1 bar and 15°C, and compresses it to 5 bar…
A: Turbine: The rotary mechanical device that converts the energy extracted from the fluid flow into…
Q: F or the heat pump shown below, the absorption heat from the cold reservoir is * 80,000 kJ/h House…
A: Given Data QH=80000 kJ/h=22.22 kW COP=2.5
Q: A solar energy based HE which recieves 60KJ of heat at 900C and rejects 50kJ of heat to the ambient…
A: Given data, Q1= 60 kJ ,T1= 90°C Q2= 50 kJ ,T2= 30°C
Q: In a winter season when outside temperature is -4°C, the inside of house is to be maintained at…
A: Data given - Outside temperature (T2) = -4°C = 269 K Inside temperature (T1) = 22°C = 295 K…
Q: An electric motor drives a gearbox of a conveyor belt via a fluid coupling. The motor delivers 40 kW…
A: Power =40 kW Speed = 1550 rpm Efficiency = 96 %
Q: A refrigeration system is used to cool water in the evaporator at 7.5 kg/s from 30°℃ to 4°C.Find the…
A: Given data: m˙=7.5 kg/sT1=30°CT2=4°CCOP=5 Need to determine the required compressor power.
Q: 3.) A home requires 5kW to maintain an indoor temperature of 21°C when the outside temperature is…
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Q: Refrigerant as a work fluid to keep an environment at 25 ° C. A heat pump using 134a is used. The…
A: The environment temperature of refrigerant fluid is given as,TL=25∘C The evaporator entering…
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A: Given data, Steam generated temperature or maximum temperature, Tmax = 310+273=583 K Rejected…
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Q: In a cascade refrigeration system,the compressor power in the low and high pressure loop are 12 kw…
A: To find : The tons of refrigeration. Given : The Compressor power in low pressure loop is W1=12…
Q: A Carnot refrigeration cycle absorbs heat at 250 K and rejects it at 300 K Calculate- i) the…
A: Given:For carnot refrigeration cycle:TL=250 KTH=300 K
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Q: Steam is supplied to a two-stage turbine at 40 bar and 350°C. It expands in the first turbine until…
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Q: for Efficiency, Work Flow rate and Qa a
A: An open heat exchanger is one in which separated steam is permitted to blend in with the feedwater.…
Q: Q.2 The heat absorption and rejection temperatures of a Carnot refrigeration cycle are -8°C and 55°C…
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Q: The reheat process is O decreases the turbine work increases the pump efficiency O decreases the…
A: Reheating Process: In the Rankine cycle when superheated steam two times expanded in two turbines,…
Q: a 15hp motor is used to drive an air compressor. the compressor efficiency is 75% and the air is…
A: Given: The motor power, P = 15 hp = 11.185 kW the efficiency of compressor = 75% = 0.75 The air…
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Q: A heat pump has a coefficient of performance of 3.1 in heating mode. If it requires 130 J of work…
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Q: Q.2 The heat absorption and rejection temperatures of a Carnot refrigeration cycle are -8°C and 55°C…
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Q: 7 Heat is transferred from a tank of water in a refrigerator at(OC) degrees to a tank of boiling…
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Q: What would be the maximum COP for a heat pump operating in your house with the outside temperature…
A: Given To determine the maximum COP for a heat pump.
Q: in the compression stroke of a gas engine the work done on the gas by the piston is 70 kJ/kg and the…
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Q: A four-cylinder refrigerant 12 compressor operates between evaporator and condenser temperature of…
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Q: simple – vapor compression cycle develops 13 tons of refrigeration. Using ammonia as the refrigerant…
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Q: In a refrigeration cycle, the refrigerant gains heat in the evaporator and in thesuction line. In a…
A: Heat is a form of energy which occurs due to thermal variation. It gets transferred from a higher…
Q: 1. The heat absorption and rejection temperatures of a Carnot refrigeration cycle are -8°C and 36°C,…
A: The heat absorption temperature, TL=-8oC=-8+273=265 KThe heat rejection temperature,…
Q: The evaporator of a refrigeration system is to be maintained at-12°C.If degree superheat is
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Q: Consider the cycle shown below.Deteremine the work of the turbines in kW given that the turbines…
A: Given details: P5=2 MPaT5=700°CP6=800 kPam1=20 kg/secm2=18kg/sec 5-6: Isentropic expansion 6-7:…
Q: A heat engine accepts heat from a source at a rate of 500 kW, and it rejects heat to a sink at a…
A: Given data: *The rate at which the heat engine accepts the heat is Qs=500 kW. *The rate at which the…
Q: A refrigeration system has a heat rejected of 430 kw.If COP is 7,find the mass chilled water in the…
A: Given , T2-T1=16o COP=7, QR=430KW, Find mw
Q: Find the required work to transfer 1200j of heat from the sink(cold body)-90°c source (hot body)at…
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- When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be higher in temperature than the entering air temperature.A refrigeration system operates on an ideal vapor compression using R-12 with an evaporator temperature of -30 C and a condenser exit temperature of 49.30C and requires 74.6 kW motor to drive the compressor. What is the capacity of the refrigerator in tons of refrigeration? Enthalpy at the condenser ,entrance = 382KJ/Kg, exit = 248.15KJ/Kg, at evaporator entrance= 248.15kJ/kg, exit =338.14kJ/kg.A food storage locker requires a refrigeration system of 2,400 kJ/min capacity at an evaporator temperature of -10OC and a condenser temperature of 30OC. The refrigerant used is freon-12 and sub-cooled by 6OC before entering the expansion valve and vapor is superheated by 7OC before leaving the evaporator coil. The compression of refrigerant is isentropic. The refrigeration compressor is two-cylinder, single-acting with stroke equal to 1.25 times the bore diameter and operates at 1000 rpm. Determine: (a) refrigerating effect, (b) mass of refrigerant to be circulated, (c) theoretical piston displacement per minute, (d) theoretical power to run the compressor in kW, (e) heat removed from the condenser per min. (f) theoretical bore and stroke of compressor.
- 1. A refrigeration system operates on an ideal vapor compression using R-12 with an evaporator temperature of -30°C and condenser exit temperature of 49 30 °C and requires 74.6 kW motor to drive the compressor. What is the capacity of the refrigerator in tons of refrigeration? Enthalpy at condenser entrance = 382 kJ/kg, exit = 248.15 kJ/kg, at evaporator entrance 248.15 KJ/kg, exit = 338.14 kJ/kg.Aa 3. A vapour compression refrigeration system of 2400 kJ/min capacity works at an evaporator temperature of 263 K and a condenser temperature of 303 K. The refrigerant used is R-12 and is subcooled by 6°C before entering the expansion valve and vapour is superheated by 7°C before leaving the evaporator coil. The compression of refrigerant is reversible adiabatic. The refrigeration compressor is two-cylinder, single acting with stroke equal to 1.25 times the bore and runs at 1000 r.p.m. Determine: 1. Refrigerating effect per kg ; 2. Mass of refrigerant circulated per minute; 3. Theoretical piston displacement per minute ; 4. Power required to run the com pressor; 5. Heat removed in through condenser ; and 6. Bore and stroke of the compressor. I want the solution on a piece of paper and using the diagram الأصدقاء المقربون3. A vapour compression refrigeration system of 2400 kJ/min capacity works at an evaporator temperature of 263 K and a condenser temperature of 303 K. The refrigerant used is R-12 and is subcooled by 6°C before entering the expansion valve and vapour is superheated by 7°C before leaving the evaporator coil. The compression of refrigerant is reversible adiabatic. The refrigeration compressor is two-cylinder, single acting with stroke equal to 1.25 times the bore and runs at 1000 r.p.m. Determine: 1. Refrigerating effect per kg ; 2. Mass of refrigerant circulated per minute ; 3. Theoretical piston displacement per minute; 4. Power required to run the com pressor; 5. Heat removed in through condenser; and 6. Bore and stroke of the compressor.
- Two evaporator compression refrigeration system as shown in the pricutre below uses refrigerant134a as a working fluid. Evaporator 1 operates at 0 ºC, evaporator 2 operates at -26.4ºC, and thecondenser operates at 800 kPa. The refrigerant is circulated through the compressor at a rate of 0.5kg/s and the low-temperature evaporator serves a cooling load of 10 kW. The refrigerant is saturated liquid at the exit of the condenser and saturated vapor at the exit of each evaporator, and the compressor is isentropic efficiency is 95%. Determine a) the cooling rate of the high-temperature evaporator,b) the power required by the compressor, c) the COP of the cycle.A compressor serves two evaporators, one providing 5 tons of cooling at -20 degree F and the other, 10 tons of cooling at 10F. The system is a vapor-compression refrigeration system using R-12 with the condenser pressure at 200 psia. Assume saturated conditions leaving the condenser and evaporators and isentropic compression. Determine (a) the refrigerant flow through each evaporator, (b) the R-12 state entering the compressor, and (c) the compressor power.An ideal vapor compression cycle operates between the temperature limits of -5 °c and 30 °C and uses R134a as the refrigerant, which flows at a rate of 0.6 kg/s. The P-h- as well as T-s-diagrams that illustrate the refrigerating process is given in diagram, and respectively. Refigerant is compressed to the state in the compressor and heat is rejected in the condenser at constant for ideal Vapour compression cycle.