! 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. Hot water C Th, in Cold water 20°C Determine the effectiveness of the heat exchanger. The effectiveness of the heat exchanger is

! 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. Hot water C Th, in Cold water 20°C Determine the effectiveness of the heat exchanger. The effectiveness of the heat exchanger is

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

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A heat exchanger is being investigated as a waste heat recovery device. A heat exchanger is common device for using a hot fluid to heat a cold fluid without the fluids mixing. The following information is known. The cold fluid stream of liquid A enters at 294.2 K and leaves the device at a temperature of 320.91 K. Liquid A flows at a rate of 0.006 Kg/s and has a specific heat of 4180 J/(Kg K). Liquid B enters the device at a temperature of 350.2 K. Liquid B flows at a rate of 0.005 Kg/s and has a specific heat of 3900 J/(Kg K The dead state is at 293.2 K and 1 bar. The device is adiabatic and the pressure losses are neglected in this problem. Both liquids are incompressible materials. Tout=316.154K Answer the following: If the exiting liquid B is not used for any useful purpose, calculate the exergy destroyed associated with it.
A Parallel-Flow concentric tube heat exchanger is used to condense steam at 45°C using cooling water entering at 20°C and at a rate of 1.2 kg/s. If the overall heat transfer coefficient is 1200 W/m2.K and the exchange area is 5.2 m2 , the outlet temperature of the cooling water is(Take for cooling water cp=4180 J/kg.K)
In a hydrocarbon processing plant, Fluid A (cp = 4.31 kJ/kg-K) entering the tube side is used to heat Fluid B (cp = 2.05 kJ/kg-K) in a heat exchanger with an overall heat transfer coefficient of 150 W/m2.°C. Based on the information given in TABLE Q3, determine the outlet temperatures of Fluid A and Fluid B. If the surface area of the heat exchanger increases 30%, what would be the effect on outlet temperatures? Justify your answer with calculation. Comment your answer. TABLE Q3 Type of heat exchanger Mass flow Inlet Surface rate, kg/s temperature, °C area, A, m2 Fluid Fluid Fluid Fluid A в А B 3.0 5.5 150 20 150 Cross flow, both fluid unmixed 3.
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A one-shell pass and two-tube passes heat exchanger must transfer 300 kW to a solution with a specific heat of 3.28 kJ/kg-K and change its temperature from 60 C to 88 C. Steam is available at 120 C. The unit convective coefficient is 3200 W/m2-K for the inside and 8500 W/m2-K for the outside. The thermal conductivity for the tubes is 115 W/m-K and the tubes have 4 cm OD and 3 cm ID and are 3 m long. Determine the number of tubes required.
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Hot water (Cp= 4.188 kJ/kg.K) with mass flow rate of 2.5 kg/s at 100 C enters a thin-walled concentric tube counterflow heat exchanger with a surface area of 23 m, and an overall heat transfer coefficient of 1000 W/m^2K. Cold water (Cp= 4.178 kJ/kg.K) with mass flow rate of 5 kg/s enters the heat exchanger at 20 C. After a period of operation, the overall heat transfer coefficient is reduced to 500 W/m^2K determine the fouling factor that caused the reduction in the overall heat transfer coefficient.
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In a double-pipe, counter-flow heat exchanger, water entering at 1 kg/s is heated from 23°C to 69°C as it flows thru the inner pipe. Hot oil enters the heat exchanger at 2 kg/s and 110°C. The convection heat transfer coefficients in the cold- and hot-sides are 100 and 50 kW/m2∙°C, respectively. Calculate the required heat transfer area in m2. Take cp = 4.18 kJ/kg∙°C for water, and cp = 1.67 kJ/kg∙°C for oil. Round your answer to 2 decimal places.
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Consider a water-to-water counter-flow heat exchanger with thesespecifications. Hot water enters at 95oC while cold water enters at 20oC. Theexit temperature of hot water is 15oC greater than that of cold water, and themass flow rate of hot water is 50 percent greater than that of cold water.The product of heat transfer surface area and the overall heat transfercoefficient is 1400 W/m2 · oC. Taking the specific heat of both cold andhot water to be Cp=4180 J/kg · oC, determine (a) the outlet temperature of the cold water (b) the effectiveness of the heat exchanger (c) the mass flow rate of the cold water, and (d) the heat transfer rate.