Calculating Required Area for Radiator: Clarifying Confusion

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SUMMARY

The discussion focuses on calculating the required area for a radiator using the equation: Mass flow rate of air = Required Area x density of air x velocity of air. Participants clarify that the "Required Area" refers to the total surface area that effectively contacts the flowing air, including the cooling fins and tubes. A specific example provided indicates a calculated area of 0.6387m², which is larger than initially expected, but participants note that such a finned radiator can be surprisingly compact.

PREREQUISITES
  • Understanding of thermodynamics principles related to heat transfer.
  • Familiarity with fluid dynamics concepts, particularly mass flow rate.
  • Knowledge of radiator design, including finned surfaces and heat exchange.
  • Basic mathematical skills for manipulating equations involving area and flow rates.
NEXT STEPS
  • Research the principles of heat transfer in finned tube radiators.
  • Learn about calculating effective surface area for heat exchangers.
  • Explore fluid dynamics equations relevant to mass flow rate and velocity.
  • Investigate the impact of air density variations on radiator performance.
USEFUL FOR

Engineers, HVAC professionals, and anyone involved in designing or optimizing radiator systems will benefit from this discussion.

hooyn
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When calculating the required area for a radiator using the equation

Mass flow rate of air = Required Area x density of air x velocity of air

Does the Required Area mean the Surface area on both sides of the radiator OR does it mean the total surface area of the cooling fins and tubes etc. ?

The value that I acquired is 0.6387m^2 which seems to be substantially larger than I expected.
thanks in advance
 
Engineering news on Phys.org
Total area that comes in (effective) contact with the flowing air.

You'd be surprised how small the 0.64m² finned radiator will end up being.
 

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