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Mechanical Engineering QUESTION #2422
Question 1
The thermal resistance for convection at a surface with heat transfer coefficient \(h\) and surface area \(A\) is:
  • \(R_{th,conv} = h \cdot A\)
  • \(R_{th,conv} = h/(kA)\)
  • \(R_{th,conv} = 1/(hA)\)✔️
  • \(R_{th,conv} = A/h\)
Correct Answer Explanation
Convective thermal resistance: \(R_{th,conv}=1/(hA)\) (K/W). This follows from \(q=hA(T_s-T_\infty)=\Delta T/R_{th,conv}\).