Answered: A heat exchanger has an over-all…

A heat exchanger has an over-all coefficient of heat transfer of 900 W/m2 - k . The mean temperature difference is 20 and heat loss is 15,000W. Calculate the heat transfer area

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.1P: 10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm...

See similar textbooks

Related questions

Q: The diameter of the tube is 25 mm. The specific heat of water is 4.18 kJ/kg.°C. The overall heat…

A: There is a coma in mass flow rate data instead of point. I am considering it as 1.8 kg/s. If it is…

Q: What is the value of the heat transfer coefficient for air at 37 ° C flowing at 5 m / s…

Q: Cold water (cp = 4180 J/kg⋅K) leading to a shower enters a thin-walled double-pipe counter-flow heat…

Q: The flow rate of hot and cold-water streams running through a parallel flow heat exchanger are 0.19…

A: Given Data Mass flow rate of hot water is : m˙h=0.19 kg/s Mass flow rate of cold water is :…

Q: Hot oil is to be cooled in a double-tube counter-flow heat exchanger. The copper inner tubes have a…

A: Hot oil is cooled by water in a double-tube counter-flow heat exchanger. The overall heat transfer…

Q: The effectiveness relation for all heat exchangers reduces to ɛ = Emax = 1 NTU) when the capacity…

A: The answer is (d) C = 0 Reason is attached below

Q: Consider a heat exchanger that has an NTU of 0.1. Someone proposes to triple the size of the heat…

A: The grouping of the terms UA/Cmin (where U is overall heat transfer coefficient, A is the surface…

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: Oil is cooled by water in a counter-current heat exchanger. If the flow rate of the oil is 1.5 kg…

A: Given, m˙o = 1.5 kg/sm˙w = 1 kg/sTw-in = -10 °CTw-out = 5 °CTo-in = 25 °CA = 5 m2Co = 2.09…

Q: Cold water (Cp = 4180 J/kg · °C) leading to a shower enters a thin-walled double-pipe counter-flow…

Q: 1. An oil heater heats 100 kg per minute of oil from 30°C to 100°C in a counter-flow heat exchanger.…

Q: In a large air-conditioning application, 1500 m3/min of air at 1 atm and 10◦C are to be heated in a…

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

A: Write the given information.

Q: tubes

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: 2. A heat exchanger like that is used to heat an oil in the tubes (c = 1.9 kJ/kg- °C) from 15-C to…

A: Given data: Tw1=130°CTw2=110°CTo1=15°CTo2=85°Cm˙w=5.2 kg/sU=275 W/m2CSteam=1.86 kJ/kg Need to…

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: For a 1 shell, 30 tube heat exchanger, the inlet temperature of the shell is 8 C and the outlet…

A: The overall heat transferred by the heat exchanger can be calculated using the formula given below…

Q: 3. An oil heater heats 100 kg per minute of oil from 30°C to 100°C in a counter-flow heat exchanger.…

Q: Water enters at 115 ℃ at a rate of 2 kg/s in a double-pipe parallel flow heat exchanger to heat a…

A: Given:Twi=115°Cmw=2 Kg/sTci=20°Cmc=3 Kg/sU=1200 W/m2°CA=7.8 m2cw=4.18 KJ/Kg°Ccc=1.8 KJ/Kg°CCw=mw*cw…

Q: (2.23) A finned heat exchanger tube is made of aluminum alloy (k = 186 W/m · K) and contains 125…

Q: A liquid is to be cooled from 60 oC to 20 oC using water entering countercurrent at 15 oC and…

Q: Water (Cp = 4180 J/kg-K) enters the 2.5 cm internal-diameter tube of a double-pipe counter-flow heat…

A: Internal diameter = 2.5 cm flow rate = 1.8 kg/s Coefficient of heat exchanger = 700 W/m2.K

Q: Consider two heat exchanger configurations: parallel-flow and counter-flow. For both configurations…

Q: A shell-and-tube process heater is to be selected to heat water (Cp = 4190 J/kg°C) from 20 °C to 90…

A: Given Data The constant pressure specific heat of the cooling water is: cp=4190 J/kg·°C The…

Q: Calculate the rate of overall heat transfer coefficient for the tube heat exchanger with inner and…

A: Given Data: The diameter of the tube, d=4 cm The thickness of the tube, t=1.5 mm

Q: The inlet temperatures for a double-pipe heat exchanger contains water are 35 °C and 200 °C. If…

Q: A STHX 1-4 heat exchanger is being used to heat a flow of liquid toluene. Toluene enters the heat…

A: Given: Inlet temperature of toluene Tc,i=5°C Flow rate of toluene Qc=18L/s or 18×10-3m3/s Inlet…

Q: 1. A thin-walled double pipe, counter-flow heat exchanger is to be used to cool oil (Cp = 2.2…

A: Answer: The overall heat transfer coefficient is 287.6956 W/m2•℃.

Q: Water enters at 20 ℃ at a rate of 0.1 kg/s in a double-pipe counter flow heat exchanger is to be…

A: Given:Twi=20°Cmw=0.1 Kg/sTai=90°Cma=0.3 Kg/sU=100 W/m2°CL=14 md=1.4 cmcw=4.18 KJ/Kg°Cca=1.01 KJ/Kg°C

Q: In a parallel flow heat exchanger with equal heat capacities of hot and cold fluids and taking…

Q: A shell-and-tube process heater is to be selected to heat water (cp = 4190 J/kg.K) from 20°C to 90°C…

A: Given:The specific heat of cooling water is,Cp=4190 J/kg oCThe velocity of water , V=3 m/sInternal…

Q: A heat exchanger was installed purposely to cool 0.50 kg of gas per second. Molecular weight of is…

A: k=1.32mG˙=0.50 kg/smW˙=0.30 kg/sTG1=150°CTG2=80°CTW2=12°CM=28

Q: Which of the following Fins/Heat exchanger will transfer more heat and why? Justify your answer.…

A: Pin fins are used to increase heat transfer from heated surfaces to air. For the same surface…

Q: A Counter-flow heat exchanger (water-to-water) with these specifications. Hot water enters at 95 °C…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: calculations to determine the values of (using the data provided for a heat exchanger): a. work done…

A: As you have posted multiple questions we will solve first 3 sub-parts as per Bartleby guidelines.…

Q: A heat exchanger has an over-all coefficient of heat transfer of 900 W/m2-K. The mean temperature…

A: Given Data: The overall coefficient of heat transfer, U=900 W/m2-K Heat loss, Q=15000 W

Q: A Counter-flow heat exchanger (water-to-water) with these specifications. Hot water enters at 95 oC…

Q: Oil at a rate of 0.8 kg/sec enter a shell and tube counter flow heat exchanger at 150°C and leaves…

Q: In a double-pipe, counter-flow heat exchanger, water entering at 1 kg/s is heated from 23°C to 69°C…

Q: Water enters at 20 ℃ at a rate of 0.1 kg/s in a double-pipe counter flow heat exchanger is to be…

A: Twi=20°Cmw=0.1 Kg/sTai=90°Cma=0.3 Kg/sU=100 W/m2°CL=14 md=1.4 cm =0.014 mcw=4.18 KJ/Kg°Cca=1.01…

Q: A countercurrent heat exchanger was designed with an overall heat transfer coefficient of 900…

Q: water flows through a long copper tube (inside diameter 2.2 cm) with an average velocity of 2.13…

Q: Hot oil (cp = 2200 J/kg.K) water in a heat exchanger with 2 bodies and 12 pipes ( cp = 4180 J/kg.K)…

Q: How would you formulate this problem to obtain a more meaningful result which desired to cool a gas…

A: Given: Cp of gas = 0.35Btu/lb F Temperature of hot fluid in (Thi)=190F Temperature of hot fluid out…

Q: air that enters the heat exchanger at 90 ℃ at a rate of 0.3 kg/s. The overall heat transfer…

A: We have to determine outlet temperatures of air

Q: Water (cp=4180 J/kg K) is to be heated by hot air (cp= 1010 J/kg K) in a double pipe counter flow…

Q: A heat exchanger is being used to transfer heat between water and a 20% ethylene glycol solution.…

A: Ethylene Glycol inlet temperature, Tc,i=20oF Ethylene Glycol outlet temperature, Tc,o=40oF Ethylene…

Q: In a flow heat

A: Hot fluid exit temperature by using the heat balance equation…

Q: d) Which of the following Fins/Heat exchanger will transfer more heat and why? Justify your answer.…

A: Write the expression for the heat transfer rate. Here, h represents the heat transfer coefficient,…

Concept explainers

Heat Exchangers

Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.

Heat Exchanger

The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.

Question

100%

A heat exchanger has an over-all coefficient of heat transfer of 900 W/m² - k . The mean temperature difference is 20 and heat loss is 15,000W. Calculate the heat transfer area.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

2.46 The wall of a liquid-to-gas heat exchanger has a surface area on the liquid side of with a heat transfer coefficient of . On the other side of the heat exchanger wall flows a gas, and the wall has 96 thin rectangular steel fins 0.5 cm thick and 1.25 cm high as shown in the accompanying sketch. The fins are 3 m long and the heat transfer coefficient on the gas side is . Assuming that the thermal resistance of the wall is negligible, determine the rate of heat transfer if the overall temperature difference is .
10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm 1D and 2.1-cm OD containing steam. The convection heat transfer coefficients on the air and steam sides of the tubes are , respectively. Calculate the overall heal transfer coefficient for the heal exchanger (a) based on the inner tube area and (b) based on the outer tube area.
A heat exchanger has an over-all coefficient of heat transfer of 900 W/m2-K. The mean temperature difference is 20C and heat loss is 15,000 W. Calculate the heat transfer area. Group of answer choices 0.765 ?2 0.557 ?2 0.833 ?2 0.712 ?2
What are the common approximations made in the analysis of heat exchangers?
In a double pipe heat exchanger if the wall resistance can be neglected and the convective heat transfer coefficient on inner diameter basis of inner pipe is 1W/m2K and convective heat transfer coefficient on basis of outside diameter is 600W/m2K, then overall heat transfer coefficient is
Consider a heat exchanger that has an NTU of 0.1. Someone proposes to triple the size of the heat exchanger and thus triple the NTU to 0.3 in order to increase the effectiveness of the heat exchanger and thus save energy. Would you support this proposal?
In a parallel flow heat exchanger, with a cooler at 40 °C at a flow of 2 kg / h, hot water at 1 kg / h is cooled from 90 ° C to 60 ° C. The total heat transfer coefficient is 1000 W / m2K. Cph = Cpc = 4182 J / kgK. According to this; b) Determine the required space for the counterflow heat exchanger case.
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (cp = 2200 J/kg·K) from 150°C to 40°C at a rate of 2 kg/s by water (cp = 4180 J/kg·K) that enters at 22°C at a rate of 1.5 kg/s. The diameter of the tube is 2.5 cm, and its length is 6 m. Determine the overall heat transfer coefficient of this heat exchanger.
In a large air-conditioning application, 1500 m3/min of air at 1 atm and 10◦C are tobe heated in a finned-tube heat exchanger with hot water entering the exchanger at 80◦C. The overall heat-transfer coefficient is 50 W/m2 · ◦C. Calculate the requiredarea for the heat exchanger for an exit air temperature of 37◦C and exit water temperature of 48◦C
Oil in an engine is being cooled by air in a crossflow heat exchanger, where both fluids are unmixed. Oil (cph = 2047 J/kg·K) flowing with a flow rate of 0.026 kg/s enters the heat exchanger at 75°C, while air (cpc = 1007 J/kg·K) enters at 30°C with a flow rate of 0.21 kg/s. The overall heat transfer coefficient of the heat exchanger is 53 W/m2·K and the total surface area is 1 m2. Determine (a) the heat transfer effectiveness and (b) the outlet temperature of the oil.
A steam power plant is equipped with a condenser that removes 500 MW of heat from steam condensing at 30°C. The tubes of the heat exchanger have an internal diameter of 2 cm, and the overall heat transfer coefficient is 3500 W/m2 · °C. The cooling is provided by cooling water from a surrounding river, which enters the tubes at 18°C and leaves at 26°C. Determine the LMTD in °C.
How does a heat exchanger work? Where and when will you use a heat exchanger?