5- he heat transfer mode in home refrigerator evaporator pipes with refrigerator space is called a. conduction b. forced convection c. radiation С. d. free convection
Q: (2-16) A simple saturated refrigerating ycle using R-12 as the refrigerant operates at an…
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Q: 5. A refrigerator with tetrafluoroethane as refrigerant operates with an evaporation temperature of…
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Q: 10. An ammonia refrigerator operates between evaporating and condensing temperatures of – 16°C and…
A: Given: Evaporator temperature TL=-16°CCondensor temperature TH=50°C
Q: An A/C unit removes heat from the house at a rate of 1 MJ/min. If the required power input to this…
A: Given:Heat rejected from the house, Q˙=1 MJ/minQ˙=160×103 kJ/secPower required to AC, Qi=6 kW
Q: Q4l/A// Prove for the condenser: %3D Cpw (Tw2-Tw1) when the temperature of cooling water outlet and…
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Q: a. COP= b.Refrigerant flow rate Answer in kg / s. c. Heat loss rate in condenser Answer kJ / s.
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Q: What is a heat pump and how does it work?
A: Note- I only give one solution at one time for other question you will upload again.
Q: Consider the winter air conditioning system shown in the figure below. Moist air enters the…
A: The winter air conditioning system shown in the figure below. Moist air enters the conditioned air…
Q: 2. A creamery must cool 20,000 liters of milk received each day from initial temperature of 29 °C to…
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Q: the food storage room requires a cooling room system with a capacity of 15 tons of refrigeration…
A: Given: The refrigeration capacity is, Q=15 tonnes. The evaporator temperature is, T1=-17.8°C The…
Q: 14. When an individual is in water, the convective heat loss term is grea:ty increased. For water…
A: Given, Kc=16.5 kcal/m2hr°C. Water heat loss, Q˙=72kcal/hr Effective area, Ac=1.75m2 Temperature of…
Q: 1. An engine operating on the air standard heat engine has 13 KJ heat added at isochoric process,…
A: given:Heat addition, Qa=13 kJheat ratio, γ=1.35minimum pressure=101 kPaminimum temperature=305…
Q: temperature of -5°C and a condensing temperature of 40°C. Determine: a) refrigerating effect; b) The…
A: Given: Refrigerant R-12 Evaporating temperature =-5oC Condensing temperature =40oC To determine: The…
Q: Q2: A Freon -12 installation has the following data: Capacity: Evaporator temperature : Condenser…
A: Note: As per our guidelines we are supposed to answer only the first 3 sub-parts. Kindly repost…
Q: 8. (a)Water temperature rise of 18 °C in water cooled condenser equivalent in K, R, and °F. (b) The…
A: Given dataT1=18°CT2=37°C
Q: A heat pump is used for cooling in summer and heating in winter. The house is maintained at 24 C…
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Q: A vacuum refrigeration system consists of a large insulated flash chamber kept at low pressure by…
A: To Find : The how much make up water is needed . Given : The water enter the flash chamber at…
Q: 2. A vacuum refrigeration system consists of a large insulated flash chamber kept at low pressure by…
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Q: - (II) An ideal heat pump is used to maintain the inside temperature of a house at Tin = 22°C when…
A: Given data Inside temperature of house = Tin = 22 °Cheat pump does a work rate = 1700 WThe heat loss…
Q: Define a refrigerator operating with its door open in a well-sealed and wellinsulated room.
A: A refrigerator operating with its door open in a well-insulated and well-sealed room. It can be…
Q: 68. The change of enthalpy in a heating chamber of dryer is 25 Btu and the mass of air supplied is…
A: As per our guidelines we are supposed to solve only one question if multiple questions are asked .…
Q: The Ocean Thermal Energy Conversion (OTEC) system in Hawai utilizes the surface water and deep water…
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Q: 1. (i) A can of soft drink at room temperature is put into the refrigerator so that it will cool.…
A: 1) soft drink can will be modelled as a close system.
Q: What is a K system?
A: given: What is a K system?
Q: /AJ/ Prove for the condenser: Cpw (Tw2-Tw1) when the temperature of cooling water outlet and inlet…
A: s1 →Saturated steam, Ts1=Tsats2 →Subcooled liquid, Ts2=Tw2w1 →Saturated liquid, Tw1=Tsatw2…
Q: 6.3 A food storage chamber requires a refrigeration system of 15-ton capacity operating at an…
A: To determine: COP Refrigerant flow rate Rate of…
Q: Round the clock cooling of an apartment having a load of 300 MJ/day requires and air conditioning…
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Q: .Determine the coefficient of performance for a Carnot Cycle Refrigerating Machine and for a Carnot…
A: Given:Tc=86 F =303.15 Ka) 50 F =283.15 Kb) 30 F =272.04 Kc) 10 F =260.9 Kd) -10 F =249.81 K
Q: Why are today’s refrigerators much more efficient than those built in the past?
A: Given Modern refrigeration To find Modern refrigeration effectiveness
Q: In thermocouple if both junctions are at the same temperature, then net emf is equal to O a. Zero O…
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Q: An auditorium is to be maintained at a temperature of 26°C DBT and 50% RH. Air is to be supplied at…
A: Draw the system as shown below, At 1: 26 °C and 50% RH,At 2: 35 °C and 60 % RHAt 4: 15…
Q: The low efficiency of a system means an extra heat energy was added Ture O False O
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Q: (9) The coefficient of performance of a residential heat pump is 1.95. If the input power to this…
A: Given data:
Q: A student buys a 5000 Btu window air conditioner for his apartment bedroom. He monitors it for one…
A: window air conditioner capacity, C =5000 Btu /h percentage of the time, t = 60% (a) calculate the…
Q: A vapour compression plant uses R-12 and is to develop 5 tonnes of refrigeration. The condenser and…
A: Note: As per our guidelines we are supposed to answer only the first 3 sub-parts. Kindly repost…
Q: A hot water radiator heats a room primarily by which of the following: a) conduction b) convention…
A: The hot water radiator heats a room primarily by the method of convection. The radiator picks the…
Q: The coefficient of performance of a residential heat pump is 1.6. Calculate the heating effect in…
A: coefficient of performance = 1.6 Workdone = 2 kW The rate of heat…
Q: 1. the wire drawing effect on pressure in the compressor done at: A. discharge valve pressure. B.…
A: 1. The wire drawing effect occurs due to pressure drop caused by restriction in flow, it occurs at…
Q: A vapour compression plant uses R-12 and is to develop 5 tonnes of refrigeration. The condenser and…
A: Refrigeration = 5 tonnes Temperature range = -10oC and 40oC
Q: An office for seating 30 occupants is to maintained at 220C DBT and 55% RH. The outdoor conditions…
A: Write the given information. Draw the flow diagram of the given air conditioning system.
Q: A surface condenser serving a 50,000 kW steam turbo-generator unit receives exhaust steam at the…
A: Given Data The power serving by the condenser is: P=50000 kW Steam received by the generator is:…
Q: Q2: A Freon -12 installation has the following data: Сараcity: Evaporator temperature : Condenser…
A: A compressor, condenser, expansion device (which might be a valve, a capillary tube, an engine, or a…
Q: (9) The coefficient of performance of a residential heat pump is 2.85. If the input power to this…
A: Consider a heat pump whose source and sink temperatures be TH and TL respectively. Let qr be the…
Q: A vacuum refrigeration system consists of a large insulated flash chamber kept at low pressure by…
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Q: (183.19, 209.41 and 74.59 kJ/kg) respectively. (i) The refrigerant flow rate, (ii) The C.O.P. (iii)…
A: for solution refer below images.
Q: ate is 30 kg/min. Determine a) the tons of refrigeration b) the power required c) the COP.
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Q: DEFINE THE REFRIGERATORS AND HEAT PUMPS
A: Refrigerator: Refrigerator is the device used to keep the things at the temperature below than the…
Q: vacuum refrigeration system consists of a large insulated flash chamber kept at low pressure by…
A: Given that, Initial temperature of chilled water o flash chamber=13 °C,Outlet temperature of chilled…
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- A thin-wall jacketed tank heated by condensing steam at one atmosphere contains 91 kg of agitated water. The heat transfer area of the jacket is 0.9m2 and the overall heat transfer coefficient U=227W/m2K based on that area. Determine the heating time required for an increase in temperature from 16C to 60C.2.43 A turbine blade 6.3 cm long, with cross-sectional area and perimeter , is made of stainless steel . The temperature of the root, , is . The blade is exposed to a hot gas at , and the heat transfer coefficient is K. Determine the temperature of the blade tip and the rate of heat flow at the root of the blade. Assume that the tip is insulated.Fish weighing 11,000 kg with a temperature of 20°C is brought to a cold storage and which shall be cooled to -10°C in 11 hours. Find the required plant refrigerating capacity in tons of refrigeration if the specific heat of fish is 0.7 kCal/kg -°C above freezing point and 0.30 kCal/kg -°C below freezing point. The freezing point is -3°C. The latent heat of freezing is 55.5 kCal/kg.
- f. A single- detached family residence in Zamboanga, Philippines, has a south-facing wall with a net exposed internal area of 100 sq. ft. The wall has an Rt of 15.1 hr-sq.ft-F/Btu. Determine the sensible heat transmission component of the cooling load for this wall if the indoor design temperature is 72 F.Refrigerationa.) Explain why you can’t cool down your kitchen by leaving your refrigerator or freezer door open with your refrigerator plugged in for an extended period of time.b.) The condenser of a home refrigerator is commonly underneath the appliance, thus the condensing refrigerant exchanges heat with household air, which averages 70oF. It is proposed toreconfigure a refrigerator so that the condenser is in the garage, where the average yearly temperature is about 50oF. Assume a freezer temperature of 0oF, a minimum temperature difference of 10K for heat transfer, and an actual coefficient of performance of 60% that of a Carnot cycle. Calculate the Coefficient of Performance for both configurations and discuss the pros and cons of this proposal.c.) Which is the most effective way to increase the coefficient of performance of a Carnot refrigerator: to increase TC with TH held constant or to decrease TH with TC held constant? Justify mathematically. For a real refrigerator, do…How to Solve this, A stainless steel plate at 100◦C faces a firebrick wall at 500◦C.Esti- mate the heat flux and radiation heat transfer coefficient, h
- A coal with a higher heating value of 6,700 Kcal/kg is consumed at a rate of 600 kg/hr. in a water tube steam generator with a rated boiler horsepower of 200 HP. The feedwater temperature is 82°C and steam generated is at 11 kg/cm2 absolute, saturated. The developed boiler horsepower is equivalent to 305 HP. Determine: a. Heating surface area in m²b. Steam evaporated in kg/hrc. ASME evaporating units in J/hrd. Percent ratinge. Factor of evaporationf. Over-all thermal efficiencyg. actual specific evaporationh. Equivalent specific evaporationthe question is in heat conservationA fuel oil heat is designed to counterflow heat transfer is used to heat fuel oil from 25 C to 99 C while the heating fluid ebters at 150 C and leaves at 105 C. the fuel oil has a specific gravity of 25 API, a specific heat of 0.65 Kcal/kg-C and enters the heater at the rate of 2600 liters per hour. determine LMTD and the heating surface area if U =130 Kcal/hr-m-C.
- A solid sphere (ρ= 800 kg/m3, cp = 4000 J/kg-K, k = 0.4 W/m-K) of diameter 1 cm is taken out of the refrigerator when it is at 15˚C and placed in a water bath that is at 45°C. a)Calculate the convective heat transfer coefficient using an appropriate practical equation.SANAE IV, a research station of The South African National Antarctic Programme (SANAP), is located on Vesleskarvet, Queen Maud Land. It uses an underground lake as the cold reservoir of a Carnot heat pump that maintains the temperature of a science lab at 307.8 K. To deposit 17360 J of heat in the lab, the heat pump requires 1086 J of work. Determine the temperature of water in the underground lake, in Kelvin.A refrigeration plant stored 10 metric tons of eggs at a temperature of 15°C. To preserve the eggs by not spoiling them, they have to be cooled at -8°C. What is the refrigerating capacity of the plant in TOR if it is cooled for 12 hours? The specific heat of the eggs above and below freezing are 0.95 kcal/kg-°C and 0.4 kcal/kg-°C, respectively. The latent heat of fusion is 68.5 kcal/kg The freezing temperature is -3°C.