An adiabatic heat exchanger is used to heat cold water át 8 C entering at a rate of 3 kg/s by hot air at 150 C entering also at rate of 3 kg/s. If the exit temperature of hot air is 30 C, the exit temperature of cold water is which of the following: (use constant specific heats evaluated at 300 K). 128.4 C 28.6 C 31.2 C O 36.9 C
An adiabatic heat exchanger is used to heat cold water át 8 C entering at a rate of 3 kg/s by hot air at 150 C entering also at rate of 3 kg/s. If the exit temperature of hot air is 30 C, the exit temperature of cold water is which of the following: (use constant specific heats evaluated at 300 K). 128.4 C 28.6 C 31.2 C O 36.9 C
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
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Transcribed Image Text:### Problem Statement on Heat Exchanger
An adiabatic heat exchanger is used to heat cold water at 8°C, entering at a rate of 3 kg/s, by hot air at 150°C, which also enters at a rate of 3 kg/s. If the exit temperature of the hot air is 30°C, determine the exit temperature of the cold water from the following choices. Use constant specific heats evaluated at 300 K.
**Options:**
- 128.4°C
- 28.6°C
- 31.2°C
- 36.9°C
- 149.7°C
### Explanation of Problem:
The problem involves the application of principles of thermodynamics to determine the exit temperature of cold water in an adiabatic heat exchanger setting. Important parameters include:
- Initial temperature of cold water: 8°C
- Rate of cold water flow: 3 kg/s
- Initial temperature of hot air: 150°C
- Rate of hot air flow: 3 kg/s
- Exit temperature of hot air: 30°C
These conditions are to be used to compute the exit temperature of the cold water, given the characteristics of an adiabatic heat exchanger (indicating no heat loss to surroundings). Constant specific heats are considered for calculation, set at 300 K.
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