Define: (i) Lumped heat capacity analysis (ii) Thermal conductivity (iii) Fourier number
[3 marks]Explain modes of Heat Transfer with suitable example.
[4 marks]Derive an expression of General heat conduction equation through Cartesian. coordinates.
[7 marks]What do you mean by convection? How do you differentiate between free and force convection?
[3 marks]Explain mechanism of thermal and velocity boundary layers along with its relationship.
[4 marks]Write equations for the following analogies and explain the terms involved with their SI units:
[7 marks]Reynold analogy
[ marks]Von-karman analogy
[ marks]Define Emissivity, Reflectivity, Absorbptivity and Irradiation.
[3 marks]What is radiation? Explain any two laws of radiation.
[4 marks]Explain calendria type evaporator.
[7 marks]Define: black, white and grey body.
[3 marks]Explain Electromagnetic spectrum with diagram.
[4 marks]Explain agitated film type evaporators.
[7 marks]Explain the mechanism of nucleate boiling.
[3 marks]Adouble pipe parallel flow heat exchanger use oil (Cp= 1.88 kJ/ kg K) at an initial temperature of 205 0C to heat the water, flowing at 225 kg/hr from 16 0C to 440C. The oil flow rate is 270 kg/ hr. what is the heat transfer area required for an overall heat transfer coefficient of 340 W/ m2K.
[4 marks]Explain heat exchanger effectiveness- NTU method and derive an expression for parallel flow.
[7 marks]Draw a pool boiling curve.
[3 marks]Water enters a counter flow double pipe H.E. at 38 0C flowing at the rate of 0.75 kg/s. it is heated by oil (Cp=1.884 kJ/kg K) flowing at the rate 1.5 kg/s from an inlet temperature of 116 0C. For an area of 13 m2 and overall heat transfer coefficient of 340 W/m2K. (value of ε=0.62) Determine the total heat transfer rate.
[4 marks]Derive an expression for counter current flow LMTD.
[7 marks]Draw a diagram of 1-2 and 2-4 shell and tube heat exchanger.
[3 marks]Why there is boiling point rise in evaporators?
[4 marks]Explain the types of condensation with diagram.1
[7 marks]Draw a neat sketch of 1-2 counter and parallel flow heat exchanger.
[3 marks]Differentiate between types of feeding method in evaporator.
[4 marks]What is condensation? What are the different factors which affects condensation?
[7 marks]