Problem 8Water enters the tubes of a cold plate at 65°C with an average velocity of 50 ft/min and leaves at 110°F. Thediameter of the tubes is 0.2 in. Assuming 20 percent of the heat generated is dissipated from the componentsto the surroundings by convection and radiation, and the remaining 80 percent is removed by the coolingwater, determine the amount of heat generated by the electronic devices mounted on the cold plate.

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Answered: Problem 8 Water enters the tubes of a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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8:26 PM Tue 8 Mar * 80% ) + : 4 Finite Control Volume Analysis 4.1 Mass Conservation The jet engine draws in air at 1800 kg/s and jet fuel at 0.916 kg/s (relative to the plane). If the density of the airfuel mixture at the exhaust is 3.36 kg/m3, determine the velocity of the exhaust relative to the plane. The exhaust nozzle has a diameter 36 of 0.8 m. 0000 00000 000000 O-0 0-000-O-0000 Oil flows into the pipe at A with an average velocity of 0.2 m/s and through B with average velocity of 0.15 m/s. Determine the maximum velocity vmaz of the oil at the cross section C if the velocity distribution is parabolic as it emerges from C, which is defined by v = vmax(1 – 100r²), where r is in meters measured from the centreline of the pipe. (Ans: Vmar = 0.6 m/s.) 37 20 35 тах V max
You are designing a heatsink to cool a 100mm tall, 100mm wide surface. The fins you use are vertically mounted thin plates, 2mm thick. The fins are spaced 5mm apart (pitch = 7mm) and protrude 50mm from the base. If the base temperature is 80 celsius , determine the optimum fin spacing. Note- RT is 25 celsius
A 50-L electrical radiator containing heating oil is placed in a 50-m³ room. Both the room and the oil in the radiator are initially at 5°C. The radiator with a rating of 3 kW is now turned on. At the same time, heat is lost from the room at an average rate of 0.3 kJ/s. After some time, the average temperature is measured to be 20°C for the air in the room, and 60°C for the oil in the radiator. Taking the density and the specific heat of the oil to be 950kg/m³ and 2.2kJ/(kg °C), respectively, determine how long the heater is kept on. Assume the room is well-sealed so that there are no air leaks.
A1 lbm/s fluid enters a machine at 170 m/s. 800 kPa, and with a specific volume of 0.3 m /kg. The radiation heat loss is 25 kJ/kg. The internal energy decreases 485 kJ/kg. If the fluid leaves at 330 m/s, 138 kPa, and O.95 m3/kg, determine the work done by the fluid in kW. O 239.9 O 825.9 O 329.86 O 528.9
When the temperature was 3 deg. C, the distance from E to F was measured using a steel tape that has a standard length of 100m at 20 deg. C with a coefficient of thermal expansion of 0.0000116 / deg. C. If the correct distance from E to F is 836.5 m, what is the measured distance in meters?
A reversible power cycle operating as in the figure receives energy QH by heat transfer from a hot reservoir at TH and rejects energy Qc-16 Btu by heat transfer to a cold reservoir at Te -40°F. The work for the cycle Wcycle - 30 Btu. Determine the thermal efficiency and TH, in °F. Hot reservoir Cold reservoir M OH Wis
Problem 8-10) Consider 2 kg of air has a decrease of internal energy of 25 kJ during a reversible non flow isobaric process. What is the change in temperature in Kelvin? Correct Answer: -17.4 to -17.2 inclusive
L Calculate the temperature correction for a tape if the tape was standardized at 25°C Assume that the observation was recorded at 30°C and coefficient of thermal expansion of the tape is 1.2 × 10-5 per °C and standard length of the tape is 20 m.
Problem No. 2 The correction in the length of the 100 m steel tape at a temperature of 40°C is 0.0015 m too long. What is the temperature for a correction of 0.004 m too short for the same tape? (answer in 4 decimal places)
In a test to determine the three orifice coefficients under constant head of water of 1.8 m, it was observed that the diameter of the jet at the vena-contracta of a 60-mm-diameter orifice was found to be 48 mm. The weight of water collected in 100 sec was 1030o N. Determine the following: (a) The coefficient of velocity. (b) The power lost in the orifice in watts. (c) The horizontal distance (m) that the water jet hits the ground Please answer this immediately. Thank you!
A steel tape with a coefficient of thermal expansion of 0.0000116/°C is known to be 50 m long at 20°C. The tape was used to measure a line that is 642.90 m long when the temperature was 35ºC. a) Calculate the temperature correction per tape length. b) Calculate the correction for the measured line. c) Calculate the correct length of the measured line.
Problem 7 Liquid water at 200 kPa and 25°C is heated in a chamber by mixing it with superheated steam at 200 kPa and 250°C. cold water enters the chamber at a rate of 2 kg/s. If the mixture leaves the mixing chamber at 50°C, determine the mass flow rate of the superheated steam required.

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