Download JNTUA M.Tech 1st Sem 2016 Aug Supply 9D17101 Advanced Thermodynamics Question Paper

Download JNTUA (JNTU Anantapur) M.Tech ( Master of Technology) 1st Semester 2016 Aug Supply 9D17101 Advanced Thermodynamics Previous Question Paper

Code: 9D17101

M.Tech I Semester Supplementary Examinations August 2016
ADVANCED THERMODYNAMICS
(Refrigeration & Air Conditioning)
(For students admitted in 2012, 2013, 2014 & 2015 only)

Time: 3 hours Max. Marks: 60
Answer any FIVE questions
All questions carry equal marks
*****
1 A piston-cylinder device contains 0.15 kg of air initially at 2 MPa and 350
0
C. The air is first
expanded isothermally to 500 kPa, then compressed polytropically with a polytropic exponent of
1.2 to the initial pressure and finally compressed at the constant pressure to the initial state.
Determine the boundary work for each process and the net work of the cycle.

2 (a) Explain the equation of state for real gases and suggest a suitable method for calculation of
constants in the Vander Waal?s equation. Describe briefly about generalized compressibility
charts along with its importance.
(b) Determine the pressure of saturated steam at 40
0
C if at 35
0
C the pressure is 5.628 kPa, the
enthalpy of vaporization is 2418.6 kJ/kg and the specific volume is 25.22 m
3
/kg. The enthalpy of
vaporization is essentially constant over this temperature range.

3 A rigid tank contains 2 kmol of N
2
and 6 kmol of CO
2
gases at 300 K and 15 MPa. Estimate the
volume of the tank on the basis of:
(a) The ideal-gas equation of state.
(b) Kay?s rule.
(c) Compressibility factors and Amagat?s law.
(d) Compressibility factors and Dalton?s law.

4 Determine the Gibbs energy for water at 25
0
C and 1 bar. Under those conditions, also determine
the change in the Gibbs energy when H
2
O( ) is formed from its elements and the Gibbs energies
of formation for H
2
O( ) and H
2
O(g).

5 Five kmole of CO, three kmole of O
2
and two kmole of CO
2
are fully mixed when they enter a
combustor at 3000 K and 1 bar. The products leave the combustor at the same temperature and
pressure at equilibrium. Determine the optimum work.

6 Draw and explain the Rankine cycle with reheat and compare the Rankine and Carnot cycles with
T-S diagram.

7 An air standard Otto cycle is to be designed according to the following specifications:
Pressure at the start of the compression process = 101 kPa.
Temperature at the start of compression process = 300 K.
Compression ratio = 8.
Maximum pressure in the cycle = 8.0 MPa.
Find:
(a) The network output per unit mass of air.
(b) Cycle efficiency.
(c) MEP.

8 Describe with neat sketch Fuel Cell Power Systems and Thermoelectric Power Conversion.

*****
FirstRanker.com - FirstRanker's Choice