Chemical Engineering Answers

a glass window with an area of 0.557 m² is installed in the wooden outside wall of a room. The wall dimension are 2.44 x 3.05 m. The wood has a k of 0.1505 W/m.K and is 25.4 mm thick. the glass is 3.18 mm thick and has a k of 0.692. the inside temperature is 299.9 K (26.7 degree Celsius) and the outside air temperature is 266.5 K . The convection coefficient hi on the inside wall of the glass and the wood is estimated as 8.5 W/m².K ; the outside ho is also estimated as 8.5 for both surfaces . Calculate the heat loss through the wooden wall, through the glass and the total

A fuel Oil temperature is decreased from 150°C to 90°C and water temperature is increased from 25°C to 70°C in a counter current double pipe heat exchanger. What is the value of LMTD?

For a liquid being cooled, the viscosity correction factor is (greater than less than/equal to) unity, and for a liquid being heated, the viscosity correction factor is ____(greater than/less than/equal to) unity? (Sieder-Tate equation) (write the answers in the same order of blanks given)

The wall of an oven operating at 1000°C consists of two layers of different material. The inside layer of wall is built of 40cm of kaoline firebrick having k-0.08 W/m-K, surrounded by 40cm of fireclay brick having k-0,8 W/m-K. The outer side of the wall is maintained at Process Heat Transfer 50°C. What is the temperature at the interface of the layers?_____

What are the various dimensionless numbers that characterize the convection heat transfer in laminar flow through tubes?______ (only write the dimensionless numbers)

What are the various dimensionless numbers that characterize the natural convection heat transfer?________ (only write the dimensionless numbers)

For industrial applications, nucleate boiling is undesirable (yes or No)

For the Prandtl (Pr) number greater than unity, the thermal boundary layer is-___(thinner than/thicker than/same as) the hydrodynamic boundary layer?

In case of pool boiling of saturated liquid, the boiling action occurring below the critical temperature drop is called_____?

case of laminar flow heat transfer over a flat plate, The heat transfer coefficient_____ (increases/decreases/remains constant) from the leading edge of plate to the end of the plate?