Asteel pipe has an inner diameter of 50mm and other diameter of 100mm. the outside temperature is 400°c and the inside temperature is 120°c. the thermal conductivity 60w/mk. calculate the heat flow from the outside to the inside for 1m length.

Heat flow equals 152.287 kW

Explanation:

For a hollow cylinder the resistance to heat flow is given by

where,

outer radius

inner radius

conductivity of heat

length of cylinder

Applying the given values we get

Now the heat flow is given by

this is true

explanation:

i looked it up

unlike the threaded fasteners which are used to clamp the machine members, power screws are used to transmit power. common applications of power screws are: screw jacks: to lift weight. lead screw of lathe: for axial movement of tool and its precise positioning.