QUESTION 8 Which type of TEMA class heat exchanger used for heaters used in canteens ( hotels)? O A. Class C O B. Class R OC. Class A OD. Class B QUESTION 9 A designer reported 5 tube passes for a shell and tube heat exchanger. O True

3 A continuous countercurrent adiabatic rotary drier is being designed for the production of 500 lb/h of a product containing 2% moisture from wet crystal containing 30% moisture, wet basis. The air entering the drier will have a dry-bulb temperature of 230°F and a wet-bulb temperature of 102°F. The air leaving the drier will be at a temperature of 115°F. Because of the small size of the crystals, the highest allowable air velocity is 10 lb dry air/ft2-min of drier cross section. Find: a. Dry air required (lb/min) b. Cross-sectional area of the drier c. Length of drier required if the volumetric coefficient of heat transfer is 25 BTU/ft3-h-°F

Insulating material is used to reduce heat loss from the heating furnace walls to the room. The surface temperature of the insulating material is 100 ° C and the other surfaces 25 ° C. Allowable heat loss up to 160 W / m2 from the wall. If the thermal conductivity of the insulation material is 0.05 W / (m ° C), calculate the required thickness of insulation. insulation thickness = Answer cm

Please no hand writing solution for other wise down vote

A tire is inflated to a gage pressure of 35 psi at a temperature of 0ºF. Calculate the maximum temperature to which the tire may be heated without the gage pressure exceeding 50 psi.  A. 110ºF     B. 124ºF    C. 139ºF      D. 158ºF

.240mm steam main pipe, 210m long is covered with 50mm of high temperature insulation (k-0.092 W/m °C) and 40mm of low temperature insulation (k-0.062 W/m °C). The inner and the outer surface temperature as measured are 390 °C and 40 °C respectively. Calculate: 1- The total heat loss per hour. 2- The temperature between two layers of insulation.

Can someone help me identify possible sources of errors while experimenting shell and tube heat exchangers? Explain clearly what will be the cause of this error. Thank you so much!