The oil (cp= 1759 J/kg.℃) from an oil cooled electric transformer is cooled from 79.5℃ to 29.4℃ at the rate of 1360.5kg per hour. This is done in an oil-water heat exchanger that receives 2948kg/hr of water at 15.6℃. For the heat exchanger U=295 W/m2℃. Find the exit temperature of water. answer: 25.294 degrees C

Q: A heat exchanger is used to heat 3600 kg/h of water (c, 4.18 kJ/kg-°C) from 40°C to 175°C by cooling…

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Q: 5000 kg of dry air per hour is cooled from 60 oC to 34 oC in a countercurrent heat exchanger. In the…

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Q: a power plant steam, steam is continuously extractedfromthe turbine and in a heat exchanger there is…

A: Data given-  Q1 = 1200 kJ/hr  Q2 =800 kJ/hr  T1 = 20°C = 293 K

Q: 4. An exhaust valve has a valve curtain area of 3 x 10³ m2 and valve discharge coefficient of 0.7.…

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Q: A double-pipe heat exchanger (tubes are concentric with very thin walls) has a length of 5 m while…

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Q: A solar water heater is used to heat water from initial temperature of 16°C to 60°C. If the solar…

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Q: lled purposely to cool us available at the rate

A: The heat transfer between two things is proportional to the temperature differential between them.…

Q: By taking the limit as DT2 DT1, show that when DT1 = DT2 for a heat exchanger, the DTlm relation…

A: When the heat capacity of the cold fluid and the hot fluids are the same for a counter flow heat…

Q: Problem 1 A counterflow double-pipe heat exchanger is to be used to heat 0.7 kg/s of water from 35…

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Q: A double-pipe counter-flow heat exch an ger is to cool eth ylene glycol (Cp = 2560 J/kg-°C) flowing…

A: Given data:

Q: 5. Air is to be heated at a rate of 1 kg/s from 30°C to 45°C in a cross flow type of heat exchanger…

A: mo=1 kgKtc1 =30°Ctco=45°Cth1=90°CU=60 W/m2KA=7.5 m2Heat transfer=Q=maCpa(tc2-tc1)Q=1×1.00545-30…

Q: A steam generation unit in power plant operates at a constant pressure of (10 bar) and the water…

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Q: Consider a flow of water in a cylinder maintained at a constant temperature of 1000 C, the diameter…

A: Heat Transfer: The transfer of heat from one body to another body due to the difference in…

Q: n-walled, double-tube, counterflow heat exchanger is used to cool oil (Cp = 2.20 kJ/kg °C) from 150…

A: Given data as per question For Hot fluid , oil Cph=2.2 kJ/kg°C, Thi=150°C, Tho=40°C, m˙=2 kg/s For…

Q: In a palm oil processing plant, the crude oil is heated using hot water from a furnace. The furnace…

A: Heat exchangers are devices that allow heat to be transferred between two fluids via a separating…

Q: Water flows inside a heat exchanger, where it gains heat. The diameter at the inlet is 50 mm with a…

A: The diameter of the heat exchanger is, d=50 mm. The velocity of the water is, v=2 m/s. The inlet…

Q: Water flows through a shower head steadily at the rate of 8 kg/min. The water is heated in an…

A: Given:  mass flow rate of water = 8 kg/min = (8/60) kg/s = 0.133 kg/s initial cold water inlet, Tc1…

Q: A component in a refrigeration system is the evaporator. It is here that the cold refrigerant picks…

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Q: A component in a refrigeration system is the evaporator. It is here that the cold refrigerant picks…

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Q: Water flows inside a heat exchanger, where it gains heat. The diameter at the inlet is 50 mm with a…

A: Given data: The diameter of the pipe at the inlet, di = 50 mm. Fluid velocity at the inlet, vi = 2…

Q: A liquid food flows in the inner pipe (internal diameter-8 cm) of a double-pipe heat exchanger. The…

A: We will show the temperature profile sketch for the liquid food and water, X axis- length Y axis -…

Q: Water enters at 110 ℃ at a rate of 2 kg/s in a double-pipe parallel flow heat exchanger to heat a…

A: As per the given data the actual answer is not listed in the options. Please find the attached…

Q: Is a car radiator a heat exchanger? If yes, then which type of heat exchanger is this?

A: Yes, a car radiator is a heat exchanger. It is used to transfer thermal energy from one place to…

Q: Warm water in a geothermal heating system enters the pipe of a radiator at 20 psia and 108°F with a…

A: Notice that the condenser area incorporates both the high temp water and space radiator and station…

Q: ou are designing an electric air heater for large conference rooms. A 75mm OD, 4mm wall thickness…

A: Given Data: The outer diameter of the pipe is D = 75 mm. The wall thickness of the pipe is t= 4 mm.…

Q: Steam at 1.4 MPa and 300°C enters the shell side of a shell and tube heat exchanger. It leaves as…

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Q: pressor -200C, leaving the compressor 500C; entering th

A: Given-Information:- 4-cylinder Diameter, D = 35 cm = 0.35 mLength, L = 40 cm = 0.4 mSpeed of…

Q: A condenser consists of several tubes. The outer diameter of each tube is 2 cm, and the thickness is…

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Q: For a production of 7000 liter of hot water at 75 °C per hour, a boiler fired with natural gas…

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Q: Water at 90C is being pumped from a large storage tank at 1 atm abs at a rate of 0.189 m3/min by a…

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Q: Hot water enters at 46 ° C and leaves at 37 ° C, and cold water enters with 19 ° C to a well…

A: Given data: The inlet hot water temperature, Th,i = 46oC. The outlet hot water temperature, Th,o =…

Q: Leftover air at 20ºC and 100kPa is driven by a fan through a horizontal galvanized conduit of 1 m in…

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Q: Water at 366.65K is pumped from a storage tank at the rate of 3.15*10-3m3s-1. The motor for the pump…

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Q: A liquid-to-gas counterflow heat exchanger is used to cool gas from 32°C to 18°C. Assuming that the…

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Q: In a shell-and-tube heat exchanger, water enters at 85°C at the rate of 5.4 kg/s. Engine oil enters…

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Q: Heat exchangers exchange only heat and not mass (fluid does not mix). The working fluid is water…

A: Given Data Steam Inlet: 500 kPa, 300°C

Q: Automobile air-conditioner gives up 18 kW at 65 km/h if the outside temperature is 35°C. The…

A: let C1 and C2 are constant V= velocity of air m˙a=C1VU=C2V-0.7U=200=C2650.7C2=10.76

Q: A heat exchanger is being used to transfer heat between water and a benzene. The benzene enters the…

A: Solution: Inlet temperature of benzene Th,i=90°C Inlet temperature of water Tc,i=15°C Density (ρ1)of…

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.