Calculating Cooling Capacity of Next Gen Heat Exchangers

In summary, the conversation discusses the Sabre Engine Program by Reaction Engines and its potential to revolutionize air and space flight. The speaker is looking for an equation to calculate the cooling capacity of the program's heat exchanger and asks for recommendations for other companies pursuing similar technology. The equation can be found in a paper by MIT or in the book "Thermal-Fluid Sciences" by Cengel and Turner. The production of the heat exchanger is a difficult and expensive task, with Brite Precision being the manufacturer for Reaction Engines.
  • #1
Chi-Badger
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I have been looking into a number of things related to Reaction Engine's Sabre Engine Program for their Skylon hypersonic aircraft. I find the program absolutely fascinating as the technological development looks like it is on track to revolutionize air and space flight in the coming decades.

To my specific question, is there an equation that can be used to calculate the amount of air that its heat exchanger can cool while in operation? (http://www.reactionengines.co.uk/heatex_rel.html ) I am assuming there is a general equation out there that would work best with some estimates, but I am having trouble locating it.

On a side note are there any other companies that are succesfully pursuing similar technology that anyone knows of? It looks like many other projects had been canceled in the last 10-15 years, but I am assuming that others must be looking to follow quickly.

Thank you
 
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  • #2
All the equations are already here:
web.mit.edu/lienhard/www/ahttv131.pdf
Or you could try the book of cengel and turner on thermal-fluid sciences.

It functions the same way as any other heat exchanger, but making this is indeed a challenge. This must be extremely difficult and expensive to make... the real wizards are the people at brite precision, the reaction engines group that manufactures this stuff..
 

Related to Calculating Cooling Capacity of Next Gen Heat Exchangers

1. How do you calculate the cooling capacity of a next-generation heat exchanger?

The cooling capacity of a heat exchanger can be calculated by multiplying the heat transfer coefficient by the surface area of the heat exchanger and the temperature difference between the hot and cold fluids. The heat transfer coefficient and surface area can be determined through experimental testing or by using mathematical equations.

2. What factors affect the cooling capacity of a next-generation heat exchanger?

The cooling capacity of a heat exchanger can be affected by various factors such as the type of fluid being cooled, the flow rate of the fluid, the design and materials of the heat exchanger, and the temperature difference between the hot and cold fluids. Other factors include the environmental conditions, such as ambient temperature and humidity, and the operating conditions of the heat exchanger.

3. How does the design of a next-generation heat exchanger impact its cooling capacity?

The design of a heat exchanger can significantly impact its cooling capacity. Factors such as the type of heat exchanger (e.g., shell and tube, plate and frame), the arrangement of the tubes or plates, and the size and shape of the heat exchanger can affect the heat transfer efficiency and, therefore, the cooling capacity. A well-designed heat exchanger can maximize the heat transfer between the fluids and increase the cooling capacity.

4. Can the cooling capacity of a next-generation heat exchanger be improved?

Yes, the cooling capacity of a heat exchanger can be improved through various methods. These include using advanced materials with higher thermal conductivity, optimizing the design and arrangement of the heat exchanger, and implementing technologies such as fins or turbulators to increase the surface area for heat transfer. Additionally, regularly maintaining and cleaning the heat exchanger can improve its efficiency and cooling capacity.

5. How do you ensure the accuracy of cooling capacity calculations for next-generation heat exchangers?

To ensure the accuracy of cooling capacity calculations, it is essential to have precise measurements of the heat transfer coefficient, surface area, and temperature difference. These can be obtained through rigorous experimental testing and using reliable mathematical equations. It is also crucial to consider all factors that may affect the cooling capacity and make adjustments accordingly in the calculations. Regular performance monitoring and maintenance can also help verify the accuracy of the cooling capacity calculations.

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