How to choose the suitable Heat sink from fluid flow analysis and thermal stress analysis by observing the temperature solid and liquid?
Please explain me in detail
If the device need to be used at the extreme
temperature of 50 degree celsious. Based on heat source value, what
is the best heatsink to be used and recommend the axial fan that
suits in this extreme condition ?
In: Mechanical Engineering
. A single stage double acting air compressor delivers 5 m of free air per minute at 1 bar and 20 C to 7.5 bar with the following data;R.P.M. = 300; Temperature rise of air during suction stroke = 12 C ; Clearance volume = 5% of stroke volume; Index of compression and expansion, n=1.3; Length of the stroke = 1.3 times the cylinder diameter.
Calculate: 1. Power input to the shaft; 2. The volumetric efficiency; and 3. The cylinder diameter
In: Mechanical Engineering
Please create a presentation slide about five (5) vibration
control examples for home appliances.
The presentation slides must be in Microsoft PowerPoint (*.pptx)
format.
In: Mechanical Engineering
Three rotating masses A = 7 kg, B = 12 kg, and C = 11 kg, are attached to a shaft with their centres of gravity at 25 mm, 55 mm and 35 mm respectively from the shaft axis. The angular positions of B and C from A are respectively 90o and 150o measured in the same direction. The distance between the planes of rotation of A and B is 1.75 m and between B and C is 2
m in the same direction.
Determine the magnitudes and angular positions with respect to A of two balance masses, each with its centre of gravity at 35
mm from the shaft axis, to be attached in planes midway between A and B and between B and C.
In: Mechanical Engineering
Two very long slender rods of the same diameter are given. One rod is of aluminum and has a thermal conductivity k1=200W/ (m.0C), but the thermal conductivity k2 of the other rod is not known. To determine the thermal conductivity of the other rod, one end of each rod is thermally attached to a metal surface which is maintained at a constant temperature T0. Both rods are losing heat by convection with a heat transfer coefficient h into the ambient air at T∞. The surface temperature of each rod is measured at various distances from the hot base surface. The temperature of the aluminum rod at x1=40cm from the base is the same as that of the rod of unknown thermal conductivity at x2=20cm from the base. Determine the thermal conductivity of k2 of second rod.
In: Mechanical Engineering
Consider the trough above the surface z=8y2 and below z=8, with −1≤x≤1. Find the moments of inertia around the x,y and z axis.
In: Mechanical Engineering
Please refer to the article titled as “Sustainable Construction Excellence for a Better Future in Malaysia, published in The Ingenieur, Vol. 69 January – March 2017 by the Board of Engineers Malaysia. Simplify and create a summary of the Article. (150 words)
In: Mechanical Engineering
Consider a shaft connected to motor at any location. Take its appropriate snaps. Assume that the shaft is failed and it has to be replaced. Measure all the required dimensions and variables required. Design and analyze a shaft considering
Static and Fatigue failure criteria, Factor of Safety, Manufacturing processes, Material properties
In: Mechanical Engineering
It is important to model spray break-up accurately. How does faster spray break-up affect vaporization rates? How does this affect non-premixed combustion? How does this affect premixed combustion?
In: Mechanical Engineering
Why do we specify parts (fasteners, gears, bearings, springs, and similar which are readily available (ready-made)?
In: Mechanical Engineering
Are the mechanical design process “interactive” or “iterative”? Explain by giving appropriate examples.
In: Mechanical Engineering
You are asked to design a piping system to fill an Olympic size swimming pool. The nominal dimensions of the pool are 164 ft long, 82 ft wide and 6 ft deep, and the filling is to take place in 6 hours. The 60 F water supply is contained in a reservoir 75 ft below the nominal elevation of the pool and contains 500 feet of 6-inch diameter cast iron pipe with 4 standard 90° elbows and 1 (fully open) gate valve. The roughness of the pipe is expected to increase as e = e0 + at, where e0 is the roughness value when the pipe is new and a = 0.000168 ft/yr. What size pump (in hp) should be chosen in order for the design to last 20 years?
In: Mechanical Engineering
A rigid tank contains hydrogen and has a volume of 4.1 ft3. It is initially at 87°F and 1,072 psia. Hydrogen then leaks from the tank until it is 76°F and 158 psia. How much heat transfer occurred into the tank, in Btu. Answer negative if heat left the tank.
In: Mechanical Engineering
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Consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of the compressor at 300 K and each stage of the turbine at 1200 K. Use variable specific heats. Assuming an efficiency of 86 percent for each compressor stage and an efficiency of 90 percent for each turbine stage. (a) no regenerator is used rbw=rbw= % (Round one decimal place) ηth=ηth= % (Round one decimal place) and (b) a regenerator with 75 percent effectiveness is used. rbw=rbw= % (Round one decimal place) ηth=ηth= % (Round one decimal place) |
In: Mechanical Engineering
There are 2 types of Fiber-reinforced composite
material. Continuous (aligned) and discontinuous(random or
aligned)
If we have aligned composite, how can we know it is discontinuous?
And what is difference with random discontinuous?
In: Mechanical Engineering