5. Hot exhaust gases, which enter a finned-tube, cross-flow heat exchanger at 300 °C and leave at 100 °C, are used to heat pressurized water at a flow rate of 1 kg/s from 35 °C to 125 °C. The specific heat of water at the average water temperature is 4197 J/kg. K. The overall heat transfer coefficient based on the gas-side surface area is Uh = 100 W/m².K. Determine the required gas-side surface area An using the LMTD and ɛ –NTU method.

5. Hot exhaust gases, which enter a finned-tube, cross-flow heat exchanger at 300 °C and leave at 100 °C, are used to heat pressurized water at a flow rate of 1 kg/s from 35 °C to 125 °C. The specific heat of water at the average water temperature is 4197 J/kg. K. The overall heat transfer coefficient based on the gas-side surface area is Uh = 100 W/m².K. Determine the required gas-side surface area An using the LMTD and ɛ –NTU method.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: In a concentric, two-pipe heat exchanger, the pressurized water with a flow rate of 12000 kg/h is…

Q: Hot water (Cp= 4.188 kJ/kg.K) with mass flow rate of 2.5 kg/s at 100 C enters a thin-walled…

A: specific heat of hot waterCph=4.188kJ/kg-Kmass flow rate of hot waterm˙h=2.5kg/sInlet temperature of…

Q: A shell and tube heat exchanger is designed as a counter to cool a mass flow rate of 60 kg/h of…

Q: 8. A shell and tube heat exchanger (single shell, two tube pass) is used to cool oil from a large…

A: First, we need to calculate the Reynolds number to determine the flow regime. The Reynolds number is…

Q: A two shell, eight tube pass STHE is to heat mineral oil from -5°C to 40°C using water with an inlet…

A: According to the data number if the sell = n = 2 Number of the tube nt = 8 total tubes N=8x2 =16…

Q: Oil in an engine is being cooled by air in a crossflow heat exchanger, where both fluids are…

A: Given, The specific heat of the oil, cp,h = 2047 J/kgK The specific heat of the air, cp,c = 1007…

Q: ! Required information Consider a water-to-water counterflow heat exchanger with these…

Q: Water entering a shell and tube heat exchanger at 350C is to be heated to 75 oC by an oil. The oil…

A: Heat Transfer: According to the second law of thermodynamics, heat is always transferred from a high…

Q: Water enters a crossflow exchanger (with both fluids unmixed) at 16◦C and flows at 7.5 kg/s. It is…

A: Disclaimer: “Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: Saturated water vapor leaves a steam turbine at a flow rate of 1.5 kg/s and a pressure of 0.51 bar.…

A: To find: The required heat exchanger surface area and the water flow rate and for the same water…

Q: A counterflow double-tube heat exchanger with hot engine oil fluid at inlet and outlet temperatures…

Q: An analysis is performed to determine the heat transfer coefficient of a oil-to-water, one-pass…

Q: Hot water at 90°C flows on the inside of a 2.5-cm-ID steel tube with 0.8-mm wall thickness at a…

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: and 2.5cm in diameter, determine (a) the rate of heat transfer and (b) the outlet temperatures of…

A: To calculate the rate of heat transfer, and outlet temperature of the glycerine and glycolgiven the…

Q: l water flowing at 14 kg.s¹ entering at 18 monia with a mass flow rate of 18 kg.s-¹ perature and…

A: mass flow rate of water mw= 14 kg/sec mass flow rate of ammonia ma= 14 kg/sec Hot fluid enter…

Q: Q1: A shell-and-tube heat exchanger having one shell pass and four tube passes is shown…

A: The inlet temperature of fluid in tube is .The exit temperature of fluid in tube is.The inlet…

Q: Example 2 A shell-and-tube exchanger (two shells, four tube passes) is used to heat 10,000 kg/h of…

Q: A performance test is being conducted on a doublepipe counter-flow heat exchanger that carries…

A: Given data as per question Engine oil flow rate = 2.5 kg/s Water mass flow rate = 1.75 kg/s Overall…

Q: G A double-pipe heat exchanger will be used to cool a hot stream (in inner pipe, ID 2.067 in, OD=…

A: The objective of this question is to calculate the wall temperature of the inner pipe in a…

Q: A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from…

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

5.
Hot exhaust gases, which enter a finned-tube, cross-flow heat exchanger at 300 °C and leave at
100 °C, are used to heat pressurized water at a flow rate of 1 kg/s from 35 °C 125 °C. The
specific heat of water at the average water temperature is 4197 J/kg. K. The overall heat
transfer coefficient based on the gas-side surface area is U₁ = 100 W/m².K. Determine the
required gas-side surface area A₁ using the LMTD and & -NTU method.

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1pp

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps

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

PART 4The following represents a parallel heat exchanger which contains 130 tubes each with a diameter of 48mm and 1.6 m long with thin walls of steel. Investigate how much hot water can be produced and how much hot gas will be needed.Using the data below determine the flow rate of water and gas for parallel and contra flow configurations and compare them.The water needs to be heated from 15oC to 95 oCThe surface heat transfer coefficient for the water = 1500 W/m2 KThe specific heat capacity of the water is 4.19 kJ/kg K. The gas temperature at inlet = 350oC and may be cooled to 120oCThe surface heat transfer coefficient for the gas = 300 W/m2 KMean specific heat of the gasses cp = 1.13 kJ/kg K.The wall is thin so the temperature drop due to conduction is negligible.
A heat exchanger is heating water on the tube side with steam condensing on the shell side. The water is entering at 45 0 F and exiting at 175 0 F. No instruments are available for measuring the tube side water flow but condensed steam from the shell side is being collected at a rate of 43 GPM. If the tube area of the exchanger is 350 Ft2 , and the overall heat transfer coefficient clean was 900 BTU/Hr.Ft2 F0, how much has the overall heat transfer coefficient changed, if at all? Note: Latent heat for water/steam at 212 0 F is 970 BTU per pound of water. A gallon of water weighs 8.34 lbs.
Hot gas enters a finned-tube, crossflow heat exchanger at 300 °C and exits at 100 °C. Assume that both fluids are unmixed. The gas is used to heat pressurized water flowing at 1 kg/s from 35 °C to 125 °C. Assume constant properties and use 1000 J/kg K and 4197 J/kg K as the specific heat of the gas and the water, respectively. The overall heat transfer coefficient, based on the gas-side surface area is U₁ = 100 W/m² K. Please determine the required gas side surface area (Aŉ), using the NTU method. Repeat the problem using the LMTD method. Compare your results by quantifying the difference between the two methods with a percent difference and write an observation/conclusion for this result.
i need the answer quickly
A counterflow heat exchanger is employed to cool 0.55 kg/s (CP = 2.45 kJ/kg-K) of oil from 115°C to 40°C by the use of water. The inlet and outlet temperatures of cooling water are 15°C and 75°C, respectively. The overall heat transfer coefficient is expected to be 1450 W/m2-°C. Using the NTU method, calculate the following:a. The mass flow rate of water.b. The effectiveness of the heat exchanger c.Surface area required
G A double-pipe heat exchanger will be used to cool a hot stream (in inner pipe, ID 2.067 in, OD= 2.375 in) from 350°F to 250°F by heating a cold stream (in annulus, ID 4.05 in) from 80°F to 120°F. If the heat-transfer coefficients are hi = 200 and ho=350 Btu/h. ft² °F, calculate the wall temperature of inner pipe. =
A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m2·K when operating at design and clean conditions. Hot fluid enters the tube side at 93°C and exits at 71°C, while cold fluid enters the shell side at 27°C and exits at 38°C. After a period of use, built-up scale in the heat exchanger gives a fouling factor of 0.0004 m2·K/W. If the surface area is 93 m2, determine (a) the rate of heat transfer in the heat exchanger and (b) the mass flow rates of both hot and cold fluids. Assume both hot and cold fluids have a specific heat of 4.2 kJ/kg·K.
Hot oil, which enter a cross-flow heat exchanger at 200 C and leave at 100 C, are used to heat water at a flow rate of 1.5 kg/s from 30 to 120 C. The overall heat transfer coefficient based on the water-side surface area is U = 220 W/m2 . K. Determine : a) the required water surface area Ac using the NTU method(let effectiveness €=0.65). b) Ac when we change the water outlet temperature to 130Cc) discuss the effect of changing the water outlet temperature to Ac? d)draw the temperature profile along the heat exchanger
! Required information Consider a water-to-water counterflow heat exchanger with these specifications. Hot water enters at 70°C while cold water enters at 20°C. The exit temperature of the hot water is 15°C greater than that of the cold water, and the mass flow rate of the hot water is 50 percent greater than that of the cold water. The product of heat transfer surface area and the overall heat transfer coefficient is 2200 W/K. Take the specific heat of both cold and hot water to be cp= 4180 J/kg.°C. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Cold water 20°C Hot water 40 °C Th, in Determine the effectiveness of the heat exchanger. The effectiveness of the heat exchanger is 0.72 *
I have the following problem, and my solution is shown in the image, is it correct? Please verify the calculations You have been asked to design a heat exchanger to pasturize milk by raising it from 4°C to 72°C. The milk will be run through the heat exchanger at a flow rate of 15 liters/second. To create the heat exchanger, milk will flow through tubes with a 1.2 cm diameter. The tubes will be kept at a constant surface temperature through exposure to condensing steam at 100°C. You have been asked to calculate the following: • A single tube design – You must specify:∗ The length of the tube ∗ Average milk velocity∗ The pressure drop required to operate the exchanger∗ Give at least two reasons why a single tube heat exchanger is not feasible
Please explain with steps.
With reference to the schematic below, a thin-walled double-pipe counter-flow heat exchanger is to be used to cool a hot fluid (cp=2200 J/kg.°C) from 150°C to 50°C at a rate of 2 kg/s by water (cp = 4180 J/kg°C) 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, U of this heat exchanger. Hot fluid 150°C Cold water 22°C 150°C Assumptions: 1.Steady operating conditions exist. 2 The heat exchanger is well-insulated so that heat loss to the surroundings is negligible.