For two heat exchangers under similar conditions except that one is cross flow and the other one is parallel flow, the amount of heat transfer of the cross flow heat exchanger should be higher than that of the parallel flow heat exchanger, for a given heat transfer area. Select one: O True O False In a condenser, the driving force of the heat transfer process is the fluid velocity. Select one: O True O False Heating a fluid flowing inside a closed circular conduit or pipe is the most important conductive heat-transfer process industry. Select one:

For two heat exchangers under similar conditions except that one is cross flow and the other one is parallel flow, the amount of heat transfer of the cross flow heat exchanger should be higher than that of the parallel flow heat exchanger, for a given heat transfer area. Select one: O True O False In a condenser, the driving force of the heat transfer process is the fluid velocity. Select one: O True O False Heating a fluid flowing inside a closed circular conduit or pipe is the most important conductive heat-transfer process industry. Select one:

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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Q1) A heat exchanger is to be designed to heat 32/68 mixture of ethylene glycol and water from 24 ᵒC to 55 ᵒC by a hot water stream from 79 ᵒC to 42 ᵒC. Flow rate of cold stream is 20 kg/s. Inlet pressure for both stream is 50 psi and the maximum pressure drop of 10 psi for cold stream and 8 psi for hot water are permissible. Report valid assumptions made for the design and give required justification. Estimate Heat Transfer, Corrected LMTD, Tube bundle diameter (Using TEMA standards and Codes) and Tube cross sectional area Heat transfer coefficient Overall heat transfer coefficient Pressure Drop (Shell side & Tube Side)
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Q1) A heat exchanger is to be designed to heat 32/68 mixture of ethylene glycol and water from 24 ᵒC to 55 ᵒC by a hot water stream from 79 ᵒC to 42 ᵒC. Flow rate of cold stream is 20 kg/s. Inlet pressure for both stream is 50 psi and the maximum pressure drop of 10 psi for cold stream and 8 psi for hot water are permissible. Report valid assumptions made for the design and give required justification. Estimate Heat Transfer, Corrected LMTD, Tube bundle diameter (Using TEMA standards and Codes) and Tube cross sectional area Heat transfer coefficient Overall heat transfer coefficient Pressure Drop (Shell side & Tube Side)
2. In a counterflow double-pipe heat exchanger, the hot fluid enters at 149°C and exits at 76°C. The cold fluid enters at 33°C and exits at 87°C. What is the heat exchanger effectiveness? Express your answer as a decimal value.
Consider the steady-state counterflow heat exchanger shown below. There are separate streams of air and water, and each stream experiences no noticeable change in pressure. Stray heat transfer with the surroundings and changes in kinetic and potential energy can be ignored. For the air, the ideal gas model can be applied and Rair = 0.287- For the operating conditions provided on kg-K the figure, determine: a. The temperature of the air at the outlet of the heat exchanger, T4, in [K] b. The rate of heat transfer between the air and the water, in [kW; , c. The rate of entropy production for the heat exchanger, in [kW/K] kg msteam = 12 P1 = 3 bar X1 = 1 P2 = P1 T2 = 200 P3 = 1 bar T3 = 1100 K P4 = P3 T, =? mair kg = 3.29
Please explain with steps.
In a heat exchanger, the heat transfer depends on the choice of the control volume
please very urgent what the correct mcq and with solving pls
QUESTION 6 En. Karim recently bought a 2-shell passes and 12-tube passes type heat exchanger for his metal factory to reduce the hot oil (cp = 2200 J/kg.K) temperature. The hot oil enters the heat exchanger through the shell passes at 160 °C with a flow rate of 0,2 kg/s. The coolant fluid used to reduce the hot oil temperature is water (cp = 4180 J/kg.K). Water flows through the heat exchanger pipe at 18 °C and at flow rate of 0.1 kg/s. The tube inside the heat exchanger is made of 1.8 cm diameter copper tube and the length is 3 m. If the overall heat transfer coefficient is 340 W/m².K, evaluate and discuss your finding for the following parameters; i. The maximum rate of heat transfer, ii. The actual rate of heat transfer, iii. The outlet temperatures of the water, and iv. The outlet temperatures of the oil.
QUESTION 9 As in the previous question, a concentric-tube, counter-flow heat exchanger, as shown below, is used to cool mercury [C, h = 1,370 J/kg - "C] flowing at a rate of 1.0 kg/s from 110°C to 70°C. 10 The cooling fluid is water entering the heat exchanger at a temperature of 30°C and flow rate of 0.2 kg/s. The overall heat transfer coefficient of the exchanger is U = 250 w/m² - °C. Water Mercury Calculate the required heat transfer area. O 7.75 m2 O 11.75 m2 O 4.75 m2 O None of these answers O 8.75 m2 Click Save and Submit to save and submit. Click Sare All Answers to save all answers. Save All Answers 人 100% G
Combustion engineering
QUESTION 7 A local brand of water heater has offered a counterflow concentric tube heat exchanger, consisting of thin walled copper drains with a diameter D; = 50 mm. Waste water from the shower enters the heat exchanger at Thi= 38 °C while fresh water enters the room at Te,j= 10 °C. The waste water flows down the vertical drain wall in a thin, falling film and providing h, = 10 kW/m²·K. i. If the annular gap is d = 10 mm, the heat exchanger length is L = 1 m, and the water flow rate is m = 10 kg/min, determine the heat transfer rate and outlet temperature of the warmed fresh water. ii. If a helical spring is installed in an annular gap so the fresh water is forced to flow a spiral path from the inlet to the fresh water outlet, resulting in he = 9050 W/m²-K, determine the heat transfer rate and outlet temperature of the fresh water. iii. Based on the result from Q5(b), calculate the daily saving if 15,000 guests each take 10 minutes shower per day and cost of water heating is…