Air cooling
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Air cooling is a method of dissipating
In all cases, the air has to be cooler than the object or surface from which it is expected to remove heat. This is due to the second law of thermodynamics, which states that heat will only move spontaneously from a hot reservoir (the heat sink) to a cold reservoir (the air).
Derating at high altitude
When operating in an environment with lower air pressure like high altitude or airplane cabins, the cooling capacity has to be derated compared to that of sea level.
A rule-of-thumb formula to note: 1 – (h/17500) = derating factor. Where h is the height over sea level in meters. And the result is the factor that should be multiplied with the cooling capacity in [W] to get the cooling capacity at the specified height over sea level.[1]
See also
- Computer cooling
- Computer fan
- Deep water air cooling
- Evaporative cooling
- Water cooling
- Oil cooling
- Heat pipe cooling
- Peltiercooling
- Heater core
References
- ^ ericsson.net – Forced air cooling of DC/DC power modules at high altitude, Design Note 025 Archived 2011-08-11 at the Wayback Machine table "Cooling efficiency"
Further reading
- Biermann, A.E. (1941). "The design of fins for air-cooled cylinders" (PDF). Report Nº 726. NACA.
- P V Lamarque, "The design of cooling fins for Motorcycle Engines", Report of the Automobile Research Committee, Institution of Automobile Engineers Magazine, March 1943 issue, and also in "The Institution of Automobile Engineers Proceedings, Session 1942-1943, pp 99-134 and 309-312.
- Julius Mackerle, "Air-Cooled Motor Engines". Charles Griffin & Company Ltd., London 1972
- Anish Gokhale et al.: "Optimization of Engine Cooling through Conjugate Heat Transfer Simulation and Analysis of Fins"; SAE Paper 2012-32-0054
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Engine block and rotating assembly | |
Valvetrain and Cylinder head | |
Forced induction | |
Fuel system | |
Ignition |
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Engine management | |
Electrical system | |
Intake system | |
Exhaust system | |
Cooling system | |
Lubrication | |
Other | |