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2
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1
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106k
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1
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Define Fin efficiency and Fin effectiveness. Explain in brief factors affecting fin effectiveness.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
3
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1
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62k
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1
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Derive the expression for log mean temperature difference (LMTD) in parallel flow heat exchanger. State your assumption.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
4
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1
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47k
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1
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What are Fourier and Biot Numbers? What is physical significance of these numbers?
heat transfer updated 4.0 years ago by teamques10 ★ 64k
5
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1
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23k
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1
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Derive expression for temperature distribution and heat dissipation in a straight fin of rectangular profile of infinitely long fin.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
0
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1
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19k
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1
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Define: Radiosity and Irradiation.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
1
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1
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18k
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1
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What is thermal Boundary Layer? Illustrate the same with the help of a neat diagram.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
1
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1
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18k
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1
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Derive expression for effectiveness by NTU method for parallel flow.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
1
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1
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18k
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1
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Derive the relation for heat transfer through fin with insulated tip. State the assumptions clearly.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
3
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1
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17k
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1
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Show by dimensional analysis for forced convection,
heat transfer updated 4.0 years ago by teamques10 ★ 64k
0
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1
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16k
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1
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What is radiation shield?
heat transfer updated 4.0 years ago by teamques10 ★ 64k
3
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1
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15k
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1
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Prove that total emissive power of black surface is $\pi$ times the intensity of radiation.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
0
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1
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14k
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1
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What is lumped system analysis? When is it applicable?
heat transfer updated 4.0 years ago by teamques10 ★ 64k
3
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1
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12k
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1
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Define Thermal diffusivity and state its significance.
heat transfer updated 4.5 years ago by teamques10 ★ 64k
0
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1
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12k
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1
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What is Fin? What are the various types of fin?
heat transfer updated 4.0 years ago by teamques10 ★ 64k
0
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1
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12k
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Explain physical significance of the Reynolds number and Prandtl number
heat transfer updated 4.0 years ago by teamques10 ★ 64k
2
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1
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11k
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What is meant by film condensation and drop wise condensation?
heat transfer updated 4.0 years ago by teamques10 ★ 64k
0
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1
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11k
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1
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Also calculate critical thickness of insulation.
heat transfer updated 4.5 years ago by teamques10 ★ 64k
3
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1
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11k
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1
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A counter flow heat exchanger is employed to cool 0.55 kg/s (Cp = 2.45 KJ/KgC) of oil from 115 C to 40 C by the use of water The inlet and outlet temperature of cooling water 15C and 75C respectively.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
1
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1
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10k
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1
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A 15mm diameter mild steel sphere $(k = 42 W/m^0C)$ is exposed to cooling airflow at $20^0C$ resulting in the convective coefficient $h= 120 W/m^{2 0}C$.
heat transfer updated 2.3 years ago by hamzarao556756 • 20
0
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1
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9.4k
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Significance of dimensionless numbers used in heat transfer by convection
heat transfer updated 4.0 years ago by teamques10 ★ 64k
0
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1
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9.0k
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1
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What percentage reduction in heat loss results from installing this insulation?
heat transfer updated 4.5 years ago by teamques10 ★ 64k
1
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1
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8.9k
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1
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An egg with mean diameter of 4 cm and initially at 20 C is placed in boiling water pan for 4 min and found to be boiled to the consumer taste.
heat transfer updated 4.0 years ago by teamques10 ★ 64k
1
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1
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8.8k
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1
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A solid copper sphere of 10 cm diameter
heat transfer updated 4.0 years ago by teamques10 ★ 64k
0
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1
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8.4k
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A filament of 75 W Light bulb may be considered as black body radiating into a black enclosure of 70deg C
heat transfer updated 4.0 years ago by teamques10 ★ 64k
2
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1
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8.0k
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1
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Calculate the center temperature of the wire.
heat transfer updated 4.5 years ago by teamques10 ★ 64k
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