Draw the reliability block diagram with blocks representing the first and second blocks of a refrigerator sub- systems
Q: A refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36° C, calculate…
A: Given, Temperature required inside refrigerator = TL = 9 oC = (273+9) K = 282 K Temperature of…
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A: An engine that transforms the chemical energy of the fuel into thermal energy which is made used for…
Q: An ammonia-water absorption refrigeration cycle is used to keep a space at -5 C when the ambient…
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Q: 7. (a) Compute the possible maximum efficiency of a heat engine operating between the temperature…
A: Given Data (a) Higher temprature = 698'C Lower Temprature = 147'C We have to find Efficiency of…
Q: » Final Exam A Carnot refrigerator operates in a room in which the temperature is (I,- 25°C). The…
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Q: An ideal refrigerator operates between -9 C and 22 °C. 1. Calculate the COP. 2. Calculate the power…
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Q: A refrigerator is designed with a turbine instead of a throttle. What would you expect to happen to…
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Q: a) The rate of heat removal from the refrigerated space and the power input to the compressor, b)…
A: (a) Write the enthalpy and entropy of the refrigerant as superheated vapor from the superheated…
Q: Is it true or false for any gas? Cp - Cv = R also , the Whp = Wr + 1 for control refrigerator
A: It is asked to validate the relation Cp-Cv = R and COP ,HP = COP,R +1
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: Determine the power consumption of a domestic refrigerator
A: Given: Refrigeration capacity (RC) = 1/8 TR Ambient temperature (TH) = 40oC= 313 K Require…
Q: A parameter used to characterize the heat pump cycle performance is called the thermal efficiency.…
A: Heat pump: The device that is used for transfer heat is called a heat pump. Refrigerators and air…
Q: Write your answer in 4 decimal places. DO NOT round off intermediate values. A refrigerator operates…
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Q: 4. An ammonia refrigerating plant operates between pressure limits of 10.34 bar and 2.265 bars. The…
A: The ammonia refrigeration plant works on the basis of thermodynamic cycle in which the process of…
Q: A refrigeration system is to be used to constantly maintain a space at -12°C in an industrial…
A: Given Minimum temperature, T1 = -12oC T2 = 24oC…
Q: A test of a 30-TR ammonia vapor compression refrigeration system gave the following results:…
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Q: The power required to drive the compressor in a carnot refrigerator is 60hp. It operates between…
A: For solution refer below images.
Q: Explain the thermodynamics cycle of a refrigerator?
A: given; Explain the thermodynamics cycle of a refrigerator?
Q: 2.) A room air conditioner has a coefficient of performance of 2.9 on a hot day and uses 850 W of…
A: Given, Electric work rate (Power) = W' = 850 W Coefficient of performance = COP = 2.9 Let us take…
Q: Determine the maximum possible thermal efficiency achievable by a heat engine.
A: Given: T1=20oC T2=6oC TO determine: The maximum possible thermal efficiency achievable by the heat…
Q: The refrigeration capacity of the following vapor-compression refrigeration cycle is: Condenser…
A: Solution: Refrigeration capacity is the heat absorbed by the evaporator coils. Therefore, in this…
Q: An ideal refrigerator is operating between 37°C and – 13°C. The power required per ton of…
A: Given, Temperature of hot reservoir = TH = 37 oC = 310 K Temperature of cold reservoir = TL = -13 oC…
Q: simple – vapor compression cycle develops 13 tons of refrigeration. Using ammonia as the refrigerant…
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Q: A refrigeration system operates on the reversed carnot cycle. If the heat added and heat rejected in…
A: Given Data: The heat added to the system is, Qa=5000 kJ/min. The heat rejected from the system is,…
Q: 320K 1000 K Q42 w (350kJ) 283K 300k
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Q: The following data refer to winter air conditioning of a building. If the heat pump cycle uses R134a…
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Q: 1.1 Draw a P-V diagram of the Carnot Refrigeration Cycle. Mention two methods to increase the COP of…
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Q: The refrigerator removes heat at the rate of 5000 kJ/hr at 5 °C. It rejects the heat at 35 °C. COP…
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Q: 5. Consider a building whose annual air-conditioning load is estimated to be 120,000 kWh in an area…
A: Given data:Annual load L = 120,000 KWhPer unit cost of electricity = $0.10/KWhCOP of A = 3.2COP of B…
Q: (a) A food compartment is to be maintained at 21°C by a refrigeration system. The total cooling…
A: GIVEN DATA- (a) Temprature limt 21'C to 35'C , Total Cooling load=330KJ/h , Heat Rejection=480KJ/h…
Q: An ammonia-water absorption refrigeration cycle is used to keep a space at -5 C when the ambient…
A:
Q: The efficiency of an ideal heat engine working between the freezing point and boiling point of water…
A: Here, the thermal efficiency of the ideal heat engine is to be found which is working between…
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Q: 4. The values of a vapor compression refrigeration cycle were given below. Calculate the values of…
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Q: Illustrate the contradiction between refrigeration cycles and the second law of thermodynamics while…
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Q: A Carnot vapor refrigeration cycle operates between thermal reservoirs at 40 ⁰F and 100 ⁰F.…
A: Given data: TL=40°F=277.594 KTH=100°F=310.928 K Need to determine the coefficient of performance.
Q: The refrigerator removes heat at the rate of 5000 kJ/hr at 5 °C. It rejects the heat at 35 °C. COP…
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Q: Refrigerators to preserve perishable foods have long been one of the essential appliances in a…
A: WE CAN GIVE ANSWER OF ONLY ONE PART AS ITS HAVING MORE THAN 2 SUBPARTS IN A QUES. SO I AM CHOOSING…
Q: 1) Which component of an air-source heat pump allows it to be used for both heating in the winter…
A: Hi and thanks for the questions. Since you have asked questions with multiple sub-parts, we will…
Q: Air conditioning units are sometimes placed on the roof of homes in the city. Occasionally, the air…
A: The phenomenon in which a vibrating framework or an outer force induces or drives another framework…
Q: A refrigerator (COP = 2.5) is used to maintain a lab temperature at 18° C for that 80 MJ of heat is…
A: Let us discuss C.O.P of refrigerator.
Q: The objective of a refrigerator is to remove QL from the cooled space.
A: objective of refrigerator
Q: An ideal refrigerator operates between -9 C and 22 °C. 1. Calculate the COP. Calculate the power…
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Q: The thermal efficiency of a reversible power cycle operating between hot and cold reservoirs is 40%.…
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Draw the reliability block diagram with blocks representing the first and second blocks of a refrigerator sub- systems
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- In an absorption refrigerator, the energy driving the process is sllPplied not as work, but as heat from a gas flame. (Such refrigerators commonly use propane as fuel, and are used in locations where electricity is unavailable. *) Let us define the following symbols, all taken to be positive by definition: Qf = heat input from flame Qe = heat extracted from inside refrigerator Qr = waste heat expelled to room Tf = temperature of flame Te temperature inside refrigerator Tr = room temperature Explain why the "coefficient of performance" (COP) for an absorption refrigerator should be defined as Qc/Qf.Goal Solve for the performance coefficient of a refrigerator using a five-step process the includes:1. Making a state table.2. Making a process table.3. Calculating the totals for Work, Heat, and Internal-Energy-Change.4. Identifying the heat input (cold reservoir) and output (hot reservoir).5. Calculating the performance coefficient of the refrigerator.Problem Shown in the figure to the right is a cyclic process undergone by a refrigerator. Your refrigerator shall use 5.0 moles of helium gas (monatomic). During the process a->b, the volume increases by a factor of 3.0. Solution- (1) Fill in the State Table (all pressures in Pascals, all volumes in cubic meters, all temperatures in K). Pressure Volume Temperature a b c (2) Fill in the Process Table (all entries in Joules). Work Heat dU a->b b->c c->a (3) Find the Totals: Work = J Heat = J dU = J (4) Find the heat input (from "cold…1. For the pasteurization process, the cold milk with a 4°C temperature value enters the first heat exchanger system. The milk exits the first eat exchanger at 27 °C and enter the 2nd heat exchanger system and exit 54° C. Finally, the milk exit from the 3rd heat exchanger at 72°C (pasteurization temperature). The heat transfer is conducted by steam. The modeling procedures for system controlling is performed based on the initial cold milk temperature. For this system, a. Define process control elements and process dynamic. b. Feed forward or feedback system why? c. How could you express transfer function for this system
- 3. A reversible refrigeration cycle operates between cold and hot reservoirs at temperatures TC and TH, respectively. (a) If the coefficient of performance is 3.5 and TC = -40 deg F, determine TH, in deg F. (b) If TC = -30 deg C and TH = 30 deg C, determine the coefficient of performance. (C) If QC = 500 Btu, QH = 800 Btu, and TC = 20 deg F, determine TH, in deg F. (d) If TC = 30 deg Fand TH = 100 deg F, determine the coefficient of performance. (e) If the coefficient of performance is 8.9 and TC = -5 deg C, find TH, in deg C.If 14 gpm of water is flowing through an open-loop heat pump with a temperature difference of 7F, how much heat in Btu/h is being absorbed or rejected in the heat pump? Show all work and units.Oven Temperature 0 wwwwww Valve ↑y Steam B Piston Oil Supply H Working Cylinder Fig. Q3 Fig. Q3 shows an arrangement for controlling the temperature of a steam heated oven. utilizing temperature sensitive bellows and a hydraulic servomechanism. An increase in oven temperature causes the bellows to expand and the left end of the 'walking beam' ABC to move downwards. thus activating the hydraulic mechanism. The end C of the walking beam actuates a valve to reduce or increase the steam flow into the oven depending on the temperature in the oven. When .x is zero the beam ABC whose mid-point is B, is horizontal. Given that, (a) oil flow in the servomechanism per unit displacement (b) area of cross section of the piston in the working cylinder -Q = A (c) heat transfer across the walls of bellows to the thermos- sensitive fluid in the bellows =q=H(0-1) where I' is the temperature of the fluid inside the bellows and H is a constant. (d) rate of change of temperature in the bellow's fluid Kq…
- Type: E 3. A heat pump is designed to transfer heat into a building at a temperature of 25°C and receive heat from underground at a temperature of 8°C. What is the maximum possible coefficient of performance of this heat pump?Example 2: The following data apply to an air-conditioning system RSH=11.6 kW RLH=11.6 Kw In side condition 25°C & RH=50% & outside condition 35°C DBT & 27.8°C WBT Return air from the room is mixed with the outside air before entering the cooling coil a ratio 4:1 Return air from the room is mixed with the air leaving the cooling coil at a ratio 1:4, cooling coil by pass factor =0.1. The air may be reheated if necessary before suppling the condition, assume tdp=10°C. find 1- Supply air condition to the room 2- Refrigeration load (Colling coil load) 3- Total refrigeration capacity d- The quantity of fresh air suppliedA refrigeration cycle operating as shown in the figure below has a coefficient of performance B = 1.8. For the cycle, Qout =750 kJ. %3D Hot body Qout System W. cycle = Qout - Qin Qin Cold body Determine Qin and Wcycle, each in kJ.
- Homework: A counterflow heat exchanger is located between a collector and a storage tank. The fluid in the collector side is a water-glycol mixture with cp=3840 J/kg. °C and a flow rate of 1.35 kg/s, whereas the fluid in the tank side is water with a flow rate of 0.95 kg/s. If the UA of the heat exchanger is 5650 W/°C, the hot glycol enters the heat exchanger at 59°C, and the water from the tank at 39°C, a) estimate the heat exchange rate; b) if FRUL is 5.71 W/m².°C and collector area is 16 m², what is the ratio FR/FR?A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The kitchen itself is well insulated and it can be assumed no heat can escape or enter the kitchen from the outside. Which of the following is the most accurate statement. The temperature in the kitchen will go down very slightly. b. The temperature in the kitchen could go up or down, depending on the Coefficient of Performance (COP) of the refrigerator. The temperature in the kitchen will stay the same. O d. The temperature in the kitchen could go up or down depending on the mechanical efficiency of the compressor. Oe. The temperature in the kitchen will go up very slightly.2. A creamery must cool 20,000 liters of milk received each day from initial temperature of 29 °C to afinal temperature of 2 °C in 5 hours. If refrigeration losses amount to 10 percent of the cooling load, what must be the capacity of the refrigerating machine? Note: Specific heat of milk is 3.9 kJ/kg-K and S.G. = 1.05