Scribd
Upload
114 views2 pages

Problem Sheet-01 Q1

The document contains 4 physics problems involving heat transfer calculations: 1) Calculating heat loss per square meter for an insulating wall with inner and outer temperatures of 352.7K and 297.1K respectively. 2) Determining the length of thick-walled cylindrical hard rubber tubing needed as a cooling coil to remove 14.65W from a bath, given inner/outer radii and temperatures. 3) Finding the rate of heat transfer per unit area by conduction through a furnace wall made of fire clay that is 6 inches thick, with an operating temperature of 6500C and outer wall temperature of 1500C. 4) An undescribed fourth problem.

Uploaded by

Farooq Ahmad
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
114 views2 pages

Problem Sheet-01 Q1

The document contains 4 physics problems involving heat transfer calculations: 1) Calculating heat loss per square meter for an insulating wall with inner and outer temperatures of 352.7K and 297.1K respectively. 2) Determining the length of thick-walled cylindrical hard rubber tubing needed as a cooling coil to remove 14.65W from a bath, given inner/outer radii and temperatures. 3) Finding the rate of heat transfer per unit area by conduction through a furnace wall made of fire clay that is 6 inches thick, with an operating temperature of 6500C and outer wall temperature of 1500C. 4) An undescribed fourth problem.

Uploaded by

Farooq Ahmad
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 2

PROBLEM SHEET-01

Q1-

Calculate the heat loss per m2 surface area for an insulating wall composed of
25.4-mm-thick fiber insulating board, where inside temp is 352.7 K and the
outside temp is 297.1 K.

Q2-

A thick-walled cylindrical tubing of hard rubber having inside radius 5 mm and


outside radius 20 mm is being used as a cooling coil in a bath. Ice water is
flowing rapidly inside, and the inside wall temp is 274.9 K. The outside surface
temp is 297.1 K. A total of 14.65 W must be removed from the bath by the
cooling coil. How many m of tubing are needed?

Q3

Determine the rate of heat transfer by conduction per unit area, by means of


conduction for a furnace wall made of fire clay. Furnace wall thickness is 6" or
half a foot. Thermal conductivity of the furnace wall clay is 0.3 W/m·K. The
furnace wall temperature can be taken to be same as furnace operating
temperature which is 6500C and temperature of the outer wall of the furnace is
1500C.
Q4

You might also like