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Heat Transfer: Heat Loss and Temperatures
The base of a 2 cm X 3 cm X 20 cm long rectangular rod is kept at 175 degrees Celsius by electrically generated heat. This is known as a straight fin or longitudinal fin. The ambient air surrounding this fin is at 28 degrees Celsius and h=10 W/m^2-C. There is negligible heat loss at the tip of the rod.
1. What is the temperature 7 cm from the base if the rod is made of a) pure zinc b) lead c) pure gold. Which will be the hottest at this point?
2. What energy input is needed to keep the base temperature at the 175 degrees for each metal?
A piston-cylinder device initially contains 50L of liquid water at 40 degrees C and 200kPa. Heat is transferred to the water at constant pressure until entire liquid is vaporized.
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To Verify the law for parallelogram of forces, law for triangle of forces and law of polygon of forces. These laws are very useful to calculate unknown forces in very short time.
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Steam enters a turbine operating at steady-state at 700 ºF and 600 lbf/in2 and leaves at 0.6 lbf/in2 with a quality of 90%. The turbine develops 12,000 hp
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Find flow rate A siphon made of a 1 in-inside-diameter pipe is used to maintain a constant level in a 20 ft-deep tank
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The maximum flow past a circular cylinder is 2 X the Up stream velocity. The max velocity occurs at the center line of the top of the cylinder.
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