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In how many categories heat exchangers are classified on the basis of direction of flow of fluids?
Number of categories heat exchanger can be classified based on the physical state of heat exchanging fluid is ____
Statement 1: Scraping improves heat transfer co-efficient by 5 times in case of non-Newtonian fluids. Statement 2: In food industry, major physical changes to food items when they’re processed, take place like transformation from Newtonian to Non-Newtonian fluids. Hence, scraped surface heat exchangers are very beneficial.
The important design and operating considerations for Extended-Surface Compact Heat Exchangers are: (1) Both fluids may have high or low heat transfer coefficients (2) As the tubes are very narrow (low DH), the fluid used should not be corrosive as effective cleaning of tubes is not possible. (3) The fluid pressure drop calculation is important as a regulatory method to ensure long life of the tubes. (4) Unlike shell and tube type heat exchangers, these are limited when it comes to operating pressure and temperature.
In how many categories heat exchangers are classified on the basis of mechanical design of heat exchanger surface?
How many Heat Exchangers can be classified on the basis of phase change of the fluids?
How many Heat Exchangers can be classified on the basis of flow passes of the fluids?
Statement 1: For non-Newtonian fluids, another term called apparent viscosity is used as their viscosity changes with the change in the shear rate. Statement 2: For non-Newtonian fluids, between the transition region, the power number for non-Newtonian fluids is slightly higher than that for Newtonian fluids.
Are these statements about the regenerative heat exchangerstrue? Statement 1: Regenerators are commonly used in gas/gas heat recovery applications. Statement 2: Regenerative heat exchangers are also known as capacitive heat exchangers.
Which of the following statements about two-phase heat exchangers are correct? Statement 1: Two-phase heat exchangers undergo phase change during the heat transfer process. Statement 2: It is used mainly in water-to-water heat transfer applications.