Q1. Draw the temperature profile for condensor
Q2. Which is economic counter-current or co-current flow heat exchanger
▶️ Counter current heat exchanger is economic.
Q3. Why is it so
▶️Due to greater value of LMTD, the area used for heat transfer will be low. Therefore cost effective.
Q4. When is effectiveness of a heat exchanger unity
▶️ It will be an ideal case (doubt)
Q5. Draw temperature profile for condensor in both type of flow
Q6. Which one is better
▶️ Since the LMTD is same in both types of flow, both will gave same results
Q7. Difference between evaporator and reboiler
▶️ Evaporator works at lower temperature and Reboiler works at higher temperature.
Q8. Write generalised heat equation in Cartesian coordinates in 3D
Q9. Example of heat transfer from low temperature to high temperature
▶️ In refrigerator, heat is taken away from cold chamber at low temperature and given to Atmosphere which is at high temperature
Q10 Working of a refrigerator
▶️ Work is done on a refrigerant substance in order to collect energy from a cold region and exhaust it in a higher temperature region, thereby further cooling the cold region. Refrigerators have made use of fluorinated hydrocarbons with trade names like Freon-12, Freon-22, etc. which can be forced to evaporate and then condense by successively lowering and raising the pressure. They can therefore “pump” energy from a cold region to a hotter region by extracting the heat of vaporization from the cold region and dumping it in the hotter region outside the refrigerator
Q11. Applications of fins
▶️ Radiators in cars, CPU heatsinks and in heat exchangerQ27. What do you know about UOP