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Engineering problems of practical interest are involved with heat exchange between two or more surfaces, and this exchange is strongly dependent upon
(i) Radiative properties
(ii) Temperature levels
(iii) Surface geometrics
Identify the correct statements
  • a)
    1 and 2
  • b)
    1 and 3
  • c)
    2 and 3
  • d)
    1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
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Engineering problems of practical interest are involved with heat exch...
For black surface, it is necessary to determine what portion of radiation emitted by one will be intercepted by the other.
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Engineering problems of practical interest are involved with heat exch...

Factors affecting heat exchange in engineering problems:

Heat exchange in engineering problems is influenced by various factors, including radiative properties, temperature levels, and surface geometrics. Let's break down each factor:

Radiative properties:
- Radiative properties of surfaces play a crucial role in heat exchange. Surfaces with high emissivity and absorptivity tend to exchange heat more efficiently through radiation.
- Understanding the radiative properties of surfaces is essential for designing effective heat exchange systems.

Temperature levels:
- The temperature gradient between surfaces significantly affects the rate of heat transfer. Higher temperature differentials generally lead to higher heat exchange rates.
- Engineers must consider the temperature levels of the surfaces involved in heat exchange processes to optimize efficiency.

Surface geometrics:
- The geometry of surfaces impacts their surface area and, consequently, the amount of heat that can be exchanged. Surfaces with larger areas typically allow for more significant heat transfer.
- Engineers must carefully design the geometrics of surfaces involved in heat exchange to maximize heat transfer efficiency.

Conclusion:
In engineering problems related to heat exchange, factors such as radiative properties, temperature levels, and surface geometrics play crucial roles. Understanding and optimizing these factors are essential for designing efficient heat exchange systems. Therefore, all three statements (1, 2, and 3) are correct in identifying the key factors affecting heat exchange in practical engineering problems.
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