Heat transfer by radiation and Temperature difference

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SUMMARY

This discussion focuses on the heat transfer by radiation in the context of maintaining body temperature during physical activities on Mars. The specific heat transfer requirement is based on an average heat generation of 400 W over 8 hours, totaling 11520 kJ. Key factors influencing the temperature difference necessary for effective heat transfer include the design of the heat dissipating element, the heat transfer mode (radiation vs. convection), and the unique environmental conditions on Mars, which features a significantly thinner atmosphere than Earth.

PREREQUISITES
  • Understanding of heat transfer principles, specifically radiation and convection.
  • Familiarity with refrigeration cycle components and their roles.
  • Knowledge of environmental conditions on Mars and their impact on thermal dynamics.
  • Basic thermodynamics, particularly related to body heat generation and dissipation.
NEXT STEPS
  • Research the design and efficiency of heat dissipating elements for extreme environments.
  • Study the principles of heat transfer modes, focusing on radiation and convection in low-pressure atmospheres.
  • Explore thermoregulation strategies for human bodies in extraterrestrial environments.
  • Investigate the impact of Martian atmospheric conditions on thermal management systems.
USEFUL FOR

Engineers, researchers, and designers working on thermal management systems for space exploration, particularly those focused on human safety and comfort in extraterrestrial environments.

FQVBSina_Jesse
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Hello all, this is related to a project that I am working on.

It is not directly related to the project but as part of it, I thought it would be a good idea to check the temperature difference that I need to maintain in order to effectively transfer a certain amount of heat between the TH in a refrigeration cycle and the environment.

The heat that I need to transfer is the amount of heat generated by the human body while performing physical activities. The rate is averaged at 400 W. For 8 hours that is a total of 11520 kJ of heat. The environment is on Mars where the atmosphere is 100 times thinner than Earth.

Thanks in advance!
 
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Temperature difference needed depends on the design of the heat dissipating element and nature of the environment .

So what can you tell us about :

The element configuration ?

The heat transfer mode ? You say radiation but could convection also be relevant or even possibly dominant ?

The environmental conditions ?
 
Last edited:
In the real situation it would not be a simple case of removing excess body heat .

The need would be to maintain body temperature within safe limits . Heating or cooling might be needed at any time as working and environmental conditions changed .
 
Last edited:

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