Vital information about overall heat transfer coefficient

Assignment Help Mechanical Engineering

Reference no: EM13135076

Important information about Overall Heat Transfer Coefficient

A copper sphere of internal diameter 2 m and wall thickness 40 mm is insulated with 75 mm of expanded polystyrene. The thermal conductivity of copper is 380 W/mK and that of the polystyrene is 0.04 W/mK. The inside and outside surface heat transfer coefficients are 500 and 12 W/m2K respectively. The inside temperature is 280 C and an ambient temperature is 20 C.

a) derive and evaluate an overall heat transfer coefficient for this situation.
b) using the above heat transfer coefficient, calculate the rate of heat transfer through the spherical wall.

show complete workings for the above.

Reference no: EM13135076

Questions Cloud

Explain how legal codes and economicforces achieving rights : Explain how legal codes and economic forces conspired to prevent slaves, peasants, and workers from achieving rights as men and citizens.

What is annual payment sam must make to pay back his friend : Sam's friend would like to be reimbursed for the time value of money at a 10% annual rate. What is the annual payment Sam must make to pay back his friend?

Determining latin squares : Show that for n less than or equal to 4, any Latin square of order n can be obtained from the multiplication table of a group by permuting rows, columns, and symbols.

How much energy would it take to raise the temperature : The molar heat capacity of silver is 25.35 J/mol * C. How much energy would it take to raise the temperature of 8.60 g of silver by 11.1 C?

Vital information about overall heat transfer coefficient : Important information about Overall Heat Transfer Coefficient A copper sphere of internal diameter 2 m and wall thickness 40 mm is insulated with 75 mm of expanded polystyrene

What would the schedule of expected cash collections : there are no bad debts/uncollectibles. What would the schedule of expected cash collections be in this scenario?

How responsive to demand is each in the market period : How responsive to demand is each in the market period and describe what a manufacturer of each product might do in the short run to increase production.

Method of cylindrical shells : R is bounded below by the x-axis and above by the curve y=2cosx, 0

How many shares are held as treasury stock by coca-cola : What percentage of authorized shares was issued by Coca-Cola at December 31, 2010, and by PepsiCo at December 29, 2010? How many shares are held as treasury stock by Coca-Cola at December 31, 2010, and by PepsiCo at December 29, 2010?

User Account

All Pages