Code No: 24062

RR

Set No. 2

in

II B.Tech II Semester Supplimentary Examinations,January 2010 CHEMICAL ENGINEERING THERMODYNAMICS - I Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Show that heat transfer during the polytropic process is product of {(γ −n)/(γ −1)} and polytrophic work done [16]

or

ld .

2. A house has a winter heating requirement of 30 kJs−1 and a summer cooling requirement of 60 kJ s−1 . Consider a heat pump installation to maintain the house temperature at 200 C in winter and 250 C in summer. This requires circulation of the refrigerant through interior exchanger coils at 300 C in winter and 50 C in summer. Underground coils provide the heat source in winter and heat sink in summer. For a year-round ground temperature of 150 C, the heat transfer characteristics of the coils necessitate refrigerant temperatures of 100 C in winter and 250 C in summer. What are the minimum power requirements for winter heating and summer cooling? [16]

uW

3. Illustrate the meaning of point function and path function with suitable examples. [16] 4. (a) A closed system contains coal. If coal is burnt, the temperature of system rises. What happens the energy content of the system? Discuss the above case in thermodynamic sense.   ∂T = − ∂P [8+8] (b) Show that ∂V ∂S v s 5. A reversible engine absorbs 250 Kcal of heat at 2600 C and discards heat at 400 C, what is

nt

(a) the work output of the engine.

(b) the heat rejected

(c) the entropy change of system, surrounding and total change in entropy. [4x4]

Aj

(d) the efficiency of heat engine

6. (a) What are limitations of virial equation? (b) What is general cubic equation of state? (c) Define acentric factor.

(d) Calculate the mass of ethane contained in a 0.5m3 cylinder at 650 C and 100 bar using pitzer correlation for the second virial coefficient. Tc=305.4 K Pc=48.8 bar and ω=0.098. [4x4]

1

Code No: 24062

RR

Set No. 2

7. (a) Calculate the minimum work required to manufacture 2.5 kg of ice cubes from water initially at 320 (F). Assume that the surroundings are at 260 C. The latent heat of fusion of water at O0 C is 75 kcal/kg. (b) Explain carnot refrigerator.

[8+8]

in

8. (a) Water at 1000 C is pumped from a storage tank at the rate of 100 lit/min. The pump supplies work at the rate of 1.4914 kW. The water passes through a heat exchanger, when it gives up heat at the rate of 1,000 kJ/kg and is delivered to a tank at an elevation of 50 m above the first tank. Calculate ∆H for the process.

Aj

nt

uW

or

?????

ld .

(b) A turbine operating under steady conditions receives 6,000 kg/hr of steam. The steam enters the turbine at a velocity of 3,000 m/min and at an elevation of 5 m, and specific enthalpy of 2,800 kJ/kg. It leaves the turbine at a velocity of 10 m/s, an elevation of 1 m and specific enthalpy of 2,200 kJ/kg. Calculate the energy converted to work. [8+8]

2

Code No: 24062

RR

Set No. 4

in

II B.Tech II Semester Supplimentary Examinations,January 2010 CHEMICAL ENGINEERING THERMODYNAMICS - I Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) What are limitations of virial equation? (b) What is general cubic equation of state?

ld .

(c) Define acentric factor.

(d) Calculate the mass of ethane contained in a 0.5m3 cylinder at 650 C and 100 bar using pitzer correlation for the second virial coefficient. Tc=305.4 K Pc=48.8 bar and ω=0.098. [4x4]

or

2. Illustrate the meaning of point function and path function with suitable examples. [16] 3. A reversible engine absorbs 250 Kcal of heat at 2600 C and discards heat at 400 C, what is

uW

(a) the work output of the engine. (b) the heat rejected

(c) the entropy change of system, surrounding and total change in entropy. (d) the efficiency of heat engine

[4x4]

nt

4. (a) A closed system contains coal. If coal is burnt, the temperature of system rises. What happens the energy content of the system? Discuss the above case in thermodynamic sense.   ∂P ∂T = − [8+8] (b) Show that ∂V ∂S s v 5. (a) Calculate the minimum work required to manufacture 2.5 kg of ice cubes from water initially at 320 (F). Assume that the surroundings are at 260 C. The latent heat of fusion of water at O0 C is 75 kcal/kg. [8+8]

Aj

(b) Explain carnot refrigerator.

6. A house has a winter heating requirement of 30 kJs−1 and a summer cooling requirement of 60 kJ s−1 . Consider a heat pump installation to maintain the house temperature at 200 C in winter and 250 C in summer. This requires circulation of the refrigerant through interior exchanger coils at 300 C in winter and 50 C in summer. Underground coils provide the heat source in winter and heat sink in summer. For a year-round ground temperature of 150 C, the heat transfer characteristics of the coils necessitate refrigerant temperatures of 100 C in winter and 250 C in summer. What are the minimum power requirements for winter heating and summer cooling? [16] 3

Code No: 24062

RR

Set No. 4

7. Show that heat transfer during the polytropic process is product of {(γ −n)/(γ −1)} and polytrophic work done [16]

in

8. (a) Water at 1000 C is pumped from a storage tank at the rate of 100 lit/min. The pump supplies work at the rate of 1.4914 kW. The water passes through a heat exchanger, when it gives up heat at the rate of 1,000 kJ/kg and is delivered to a tank at an elevation of 50 m above the first tank. Calculate ∆H for the process.

Aj

nt

uW

or

?????

ld .

(b) A turbine operating under steady conditions receives 6,000 kg/hr of steam. The steam enters the turbine at a velocity of 3,000 m/min and at an elevation of 5 m, and specific enthalpy of 2,800 kJ/kg. It leaves the turbine at a velocity of 10 m/s, an elevation of 1 m and specific enthalpy of 2,200 kJ/kg. Calculate the energy converted to work. [8+8]

4

Code No: 24062

RR

Set No. 1

in

II B.Tech II Semester Supplimentary Examinations,January 2010 CHEMICAL ENGINEERING THERMODYNAMICS - I Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????

ld .

1. (a) Water at 1000 C is pumped from a storage tank at the rate of 100 lit/min. The pump supplies work at the rate of 1.4914 kW. The water passes through a heat exchanger, when it gives up heat at the rate of 1,000 kJ/kg and is delivered to a tank at an elevation of 50 m above the first tank. Calculate ∆H for the process.

or

(b) A turbine operating under steady conditions receives 6,000 kg/hr of steam. The steam enters the turbine at a velocity of 3,000 m/min and at an elevation of 5 m, and specific enthalpy of 2,800 kJ/kg. It leaves the turbine at a velocity of 10 m/s, an elevation of 1 m and specific enthalpy of 2,200 kJ/kg. Calculate the energy converted to work. [8+8]

2. Illustrate the meaning of point function and path function with suitable examples. [16]

uW

3. Show that heat transfer during the polytropic process is product of {(γ −n)/(γ −1)} and polytrophic work done [16] 4. (a) A closed system contains coal. If coal is burnt, the temperature of system rises. What happens the energy content of the system? Discuss the above case in thermodynamic sense.   ∂T = − ∂P [8+8] (b) Show that ∂V ∂S v s

Aj

nt

5. A house has a winter heating requirement of 30 kJs−1 and a summer cooling requirement of 60 kJ s−1 . Consider a heat pump installation to maintain the house temperature at 200 C in winter and 250 C in summer. This requires circulation of the refrigerant through interior exchanger coils at 300 C in winter and 50 C in summer. Underground coils provide the heat source in winter and heat sink in summer. For a year-round ground temperature of 150 C, the heat transfer characteristics of the coils necessitate refrigerant temperatures of 100 C in winter and 250 C in summer. What are the minimum power requirements for winter heating and summer cooling? [16] 6. (a) Calculate the minimum work required to manufacture 2.5 kg of ice cubes from water initially at 320 (F). Assume that the surroundings are at 260 C. The latent heat of fusion of water at O0 C is 75 kcal/kg. (b) Explain carnot refrigerator.

[8+8]

7. (a) What are limitations of virial equation? 5

Code No: 24062

RR

Set No. 1

(b) What is general cubic equation of state? (c) Define acentric factor. (d) Calculate the mass of ethane contained in a 0.5m3 cylinder at 650 C and 100 bar using pitzer correlation for the second virial coefficient. Tc=305.4 K Pc=48.8 bar and ω=0.098. [4x4]

in

8. A reversible engine absorbs 250 Kcal of heat at 2600 C and discards heat at 400 C, what is (a) the work output of the engine.

ld .

(b) the heat rejected

(c) the entropy change of system, surrounding and total change in entropy. (d) the efficiency of heat engine

[4x4]

Aj

nt

uW

or

?????

6

Code No: 24062

RR

Set No. 3

in

II B.Tech II Semester Supplimentary Examinations,January 2010 CHEMICAL ENGINEERING THERMODYNAMICS - I Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????

ld .

1. (a) Water at 1000 C is pumped from a storage tank at the rate of 100 lit/min. The pump supplies work at the rate of 1.4914 kW. The water passes through a heat exchanger, when it gives up heat at the rate of 1,000 kJ/kg and is delivered to a tank at an elevation of 50 m above the first tank. Calculate ∆H for the process.

or

(b) A turbine operating under steady conditions receives 6,000 kg/hr of steam. The steam enters the turbine at a velocity of 3,000 m/min and at an elevation of 5 m, and specific enthalpy of 2,800 kJ/kg. It leaves the turbine at a velocity of 10 m/s, an elevation of 1 m and specific enthalpy of 2,200 kJ/kg. Calculate the energy converted to work. [8+8] 2. A reversible engine absorbs 250 Kcal of heat at 2600 C and discards heat at 400 C, what is

uW

(a) the work output of the engine. (b) the heat rejected

(c) the entropy change of system, surrounding and total change in entropy. (d) the efficiency of heat engine

[4x4]

nt

3. (a) A closed system contains coal. If coal is burnt, the temperature of system rises. What happens the energy content of the system? Discuss the above case in thermodynamic sense.   ∂T = − ∂P [8+8] (b) Show that ∂V ∂S v s 4. (a) What are limitations of virial equation? (b) What is general cubic equation of state?

Aj

(c) Define acentric factor.

(d) Calculate the mass of ethane contained in a 0.5m3 cylinder at 650 C and 100 bar using pitzer correlation for the second virial coefficient. Tc=305.4 K Pc=48.8 bar and ω=0.098. [4x4]

5. Show that heat transfer during the polytropic process is product of {(γ −n)/(γ −1)} and polytrophic work done [16] 6. (a) Calculate the minimum work required to manufacture 2.5 kg of ice cubes from water initially at 320 (F). Assume that the surroundings are at 260 C. The latent heat of fusion of water at O0 C is 75 kcal/kg. 7

Code No: 24062

RR

Set No. 3

(b) Explain carnot refrigerator.

[8+8]

in

7. A house has a winter heating requirement of 30 kJs−1 and a summer cooling requirement of 60 kJ s−1 . Consider a heat pump installation to maintain the house temperature at 200 C in winter and 250 C in summer. This requires circulation of the refrigerant through interior exchanger coils at 300 C in winter and 50 C in summer. Underground coils provide the heat source in winter and heat sink in summer. For a year-round ground temperature of 150 C, the heat transfer characteristics of the coils necessitate refrigerant temperatures of 100 C in winter and 250 C in summer. What are the minimum power requirements for winter heating and summer cooling? [16]

Aj

nt

uW

or

?????

ld .

8. Illustrate the meaning of point function and path function with suitable examples. [16]

8

RR Set No. 2

Underground coils provide the heat source in winter and heat sink in summer. For a year-round .... latent heat of fusion of water at O0C is 75 kcal/kg. (b) Explain ...

67KB Sizes 0 Downloads 235 Views

Recommend Documents

RR Set No. 2
A venturimeter is to be fitted in a pipe of 0.20m diameter where pressure ... diameter of the throat to ensure that the pressure head does not become negative.

RR Set No. 2
in each droplet of dispersed phase, no movement of A or R in to continuous phase, · and identical concentration of B with in all the droplets determine the ...

RR Set No. 2
3. (a) Explain the different steps to be conducted for software design from project ... (b) “Object Oriented Analysis is radically different from the conventional Struc-.

RR Set No. 2
G = inert-gas rate, lb moles/hr. H = moles of inert solvent held up by packing per unit of tower volume k = reaction-rate constant, lb moles/- (lb mole/hr).

RR Set No. 2
RR. Set No. 2. II B.Tech II Semester Supplementary Examinations,May 2010 ... Code No: RR220801. RR. Set No. 2. (b) One kg of steam having a volume of 180 ...

RR Set No. 2
3. Sketch the root locus of the given system GH(s) = K / (s+1) (s+3) (s+6) · (a) Find the break ... amplifier gain KA=5. Also find steady state error to unit ramp input.

RR Set No. 2
RR. Set No. 2. II B.Tech I Semester Supplementary Examinations,June 2010 · ELECTROMAGNETIC THEORY · Common to Electronics And Control Engineering ...

RR Set No. 2
ii. Synchronous motors totaling 100HP with an average efficiency of 85% and ... RR. Set No. 2. 7. (a) Explain the principle of operation of circuit ReClosure.

RR Set No. 2
Vapour pressure in mm Hg. 200 400 760 1520. T emperature0C for ethanol. 48.4 62.5 78.4 97.5. T emperature0C for methanol 34.8 49.9 64.7. 84. 3. AjntuWorld.

RR Set No. 2
(a) Explain the Flag register of 8085 Microprocessor. (b) Explain the following pins of 8085 Microprocessor. i. RST 5.5 · ii. RST 6.5 · iii. READY · iv. INTA · v. X1,X2 · [6+10] · 3. (a) Define a macro for moving an arbitrary character string that en

RR Set No. 2
is not to exceed 0.85 bar. External diameter of the friction plate is 1.25 times the · internal diameter. Determine the dimensions of the friction plate and the axial.

RR Set No. 2
Code No: RR310806. RR. Set No. 2. III B.Tech I Semester Examinations,May 2011 · ENERGY ENGINEERING · Chemical Engineering · Time: 3 hours.

RR Set No. 2
Code No: RR420203. RR. Set No. 2. IV B.Tech II Semester Examinations,APRIL 2011 · V L S I DESIGN · Electrical And Electronics Engineering · Time: 3 hours.

RR Set No. 2
Code No: 24063. RR. Set No. 2. II B.Tech II Semester Supplimentary Examinations,February 2010 · PHYSICAL CHEMISTRY · Chemical Engineering.

RR Set No. 2
RR. Set No. 2. III B.Tech II Semester Examinations,APRIL 2011 · COMPUTER GRAPHICS · Computer Science And Engineering · Time: 3 hours · Max Marks: 80.

RR Set No. 2
HYDRAULICS AND HYDRAULIC MACHINERY · Civil Engineering ... loss is 10 KW and the hydraulic efficiency is 80%, calculate the blade angle at outlet, the ...

RR Set No. 2
RR. Set No. 2. III B.Tech II Semester Supplimentary Examinations,February 2010 ... RR. Set No. 2 ii. Is the system in a safe state? Verify with algorithm.

RR Set No. 2
Code No: 21007. RR. Set No. 2. I B.Tech I Semester Supplimentary Examinations,January 2010 · FUNDAMENTALS OF BIOLOGY · Bio-Technology.

RR Set No. 2
The Antoine constants are given by. Components. A. B. C. 1-Proponol. 8.37895 1788.020 227.438. Chlorobenzene 7.17294 1549.200 229.260. 1. AjntuWorld.in ...

RR Set No. 2
Explain about Pseudo-logic and draw the circuit topology of a three-input NOR · gate designed in Pseudo - NMOS. [16] · 3. Define different current parameters of Digital IC and explain their significance.[16] · 4. Design the seven segment decoding fun

RR Set No. 2
2. Explain about different BLAST programs in detail with a neat flow charts and how · are they useful? [16] · 3. Write an essay on gene Prediction in Eukaryotes?

RR Set No. 2
How do you design magnetic circuit of a Shell type Power Transformer. Explain it · clearly. [16] · 6. Explain how Tank for Core Type Power Transformer is designed. Write a computer · algorithm for the same. [16] · 7. Explain the important variables i

RR Set No. 2
Set No. 2. I B.Tech Supplimentary Examinations, January 2010 · INFORMATION TECH. AND NUME. METHODS · Common to BME, IT, BT, ICE, E.COMP.E, ETM ...

RR Set No. 2
Common to Information Technology, Electronics And Computer · Engineering ... List the blending functions suitable for cubic Bezier curves. Discuss their ...