Hot water (0.01 m³ /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately

Heat Transfer
Hot water (0.01 m³ /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately

45

50

32

37

45

50

32

37

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Heat Transfer
In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)

α ≠ 1, ε ≠ 1

α = 1; ε ≠ 1

α ≠ 1, ε = 1

α = 1; ε = 1

α ≠ 1, ε ≠ 1

α = 1; ε ≠ 1

α ≠ 1, ε = 1

α = 1; ε = 1

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Heat Transfer
In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is

Less

More

Same

More or less; depends on the nature of solution

Less

More

Same

More or less; depends on the nature of solution

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Heat Transfer
LMTD for counterflow and prallel flow heat exchanger will be the same, when the

Outlent temperature of both the hot and cold fluid are same

Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)

Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid

None of these

Outlent temperature of both the hot and cold fluid are same

Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)

Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid

None of these

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Heat Transfer
Kirchoff s law applies to __________ radiation

None of the listed here

monochromatic

Both total & monochromatic

total

None of the listed here

monochromatic

Both total & monochromatic

total

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Heat Transfer
Intermittant tube cleaning is possible to be done in case of a __________ evaporator.

Horizontal tube

Calendria

None of these

Basket type

Horizontal tube

Calendria

None of these

Basket type

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Heat Transfer

Heat Transfer Hot water (0.01 m³ /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately

Heat Transfer In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)

Heat Transfer In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is

Heat Transfer LMTD for counterflow and prallel flow heat exchanger will be the same, when the

Heat Transfer Kirchoff s law applies to __________ radiation

Heat Transfer Intermittant tube cleaning is possible to be done in case of a __________ evaporator.

Heat Transfer
Hot water (0.01 m³ /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately

Heat Transfer
In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)

Heat Transfer
In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is

Heat Transfer
LMTD for counterflow and prallel flow heat exchanger will be the same, when the

Heat Transfer
Kirchoff s law applies to __________ radiation

Heat Transfer
Intermittant tube cleaning is possible to be done in case of a __________ evaporator.