Transcript
Page 1: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

SRI VENKATESWARA COLLEGE OF ENGINEERING

DEPARTMENT OF MECHANICAL ENGINEERING

THERMAL ENGINEERING LABORATORY

UG Third year Mechanical Engineering students (2012-2016) at Thermal Engineering laboratory

AVL combustion analyser with Charge amplifier setup

Page 2: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Department of Mechanical Engineering

THERMAL ENGINEERING LABORATORY

Machine Name / Type Specifications 

 

Photographic view 

Four  Stroke  diesel engine  with combustion analyzer 

 

 

Rated power    4.4 kW Rated speed     650 

rpm Bore 

diameter      114.3 mm 

Stroke  139.7 mm 

Compression ratio          

16.0 : 1 

Orifice diameter 

30 mm 

Coefficient of discharge      

0.62    

  

Bomb calorimeter  

Calorific value 

nichrome wire 

1400 J/g 

Calorific value of sewing cotton 

17473 J/g 

Water equivalent 

of calorimeter 

(W) 

9719 J/oC 

Mass of nichrome wire/cm 

2.45 x 10‐3 g 

Page 3: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Boiler Heating surface      

22.5 m2  

Standard working pressure 

15 bar 

Capacity  750 kg/h 

 

Steam turbine  

          

Maximum pressure          

6 bar 

Maximum speed 

4000 rpm 

Efficiency of the 

generator               

 

0.75 

Page 4: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Twin cylinder diesel engine  

Rated power     7.36 kW Rated speed 

(N)             1500 rpm 

Bore dia (D)      95 mm Stroke (L)        110 mm Length of 

lever arm (R)    0.32 m 

Orifice dia.(d)    24 mm Coefficient of discharge (Cd)   

0.6 

Compression ratio           

16 : 1             

Heat  balance  test  diesel engine 

 

  

 

Rated power     3.7 kW Rated speed     1500 rpm Bore dia (D)      80 mm Stroke (L)        110 mm 

Compression ratio           

16.5 : 1 

Orifice dia (d)    19 mm Coefficient of discharge (Cd)   

0.6         

Page 5: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Pin‐fin apparatus(Natural  Convection) 

 

 

Duct size       15 x 10 cm Diameter of the fin (d)     

12.7 mm 

Length of the fin (l)      

125 mm 

Diameter of the orifice 

(do)           

18 mm 

Coefficient of discharge 

(Cd)           

0.64 

Thermal conductivity 

of fin material (k) 

110 W/mK         

Loading device  

                             

  

Make     Benz systems 

Dynamometer constant    

2000 

Supply voltage       

240 ±10 % AC, 50 Hz, 1 

φ Maximum excitation current 

6 to 8 Amp               

    

Page 6: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Thermal conductivity of the given composite wall 

 

  

  

 

M.S. plate      300 mm φ x 12 mm thick 

Wood plate    300 mm φ x 12 mm thick 

Backelite plate 

300 mm φ x 12 mm thick 

    

    

Parallel & Counter flow heat exchangers 

 

                              

 

Length of heat 

exchanger (l)            

1.6 m 

Inner (copper) tube inner diameter 

(di) 

11 mm 

Inner (copper) tube outer diameter 

(do) 

12.5 mm 

Outer (GI) tube inner diameter 

(Di)       

24 mm 

Outer (GI) tube outer diameter 

(Do)       

32 mm  

  

Page 7: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Two stage reciprocating air compressor 

 

 

Working pressure 

7 bar 

Orifice diameter (do) 

10.4 mm 

Coefficient of discharge (Cd) 

0.6 

Compressor  1.5 kW LP cylinder bore (D)   

63 mm 

LP cylinder stroke (L)   

89 mm 

HP cylinder bore 

57 mm 

HP cylinder stroke   

63 mm         

Multi Cylinder Petrol engine with Eddy Current Dynamometer 

 

                             

Rated power        

29.5 kW 

Rated speed (N)           

5500 rpm 

Bore dia (D)    68.5 mm Stroke (L)      72 mm 

      

Page 8: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Forced convection apparatus inside the tube

 

   

Outer pipe diameter

(Do) 

32 mm 

Inner pipe diameter

(Di) 

28 mm 

Length of test section

(L) 

500 mm 

Blower  0.5 HP motor 

Orifice diameter (d) 

14 mm 

Dimmer-stat  0 to 2 Amps. 260 Volts,

A.C. Temperature

Indicator 0 to 300°C 

Voltmeter  0 -100/200 V Ammeter  0-2 A 

Heater  400 watts  

Lagged pipe apparatus

 

      

                         

M.S inner pipe (d1) 

60 mm 

M.S middle pipe (d2) 

114 mm 

M.S outer pipe (d3) 

165 mm 

The effective

length of the pipes (L) 

   

500 mm  

        

Page 9: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Heat transfer from pin-fin (Forced convection)

 

  

Diameter of the tube(D)

38 mm 

Length of the tube(L)

500 mm 

Duct size 250 mm x 250 mm x 900 mm 

No. of thermocouples

7 and marked on Temperature indicator

switch Thermocouple

No. 8 reads the temperature of air in the duct. 

Temperature Indicator

0 – 3000C 

Ammeter 0 – 2 Amps Voltmeter 0 – 100 /

200 Volts Dimmerstat 2 Amps. /

230 Volts Heater Cartridge

type (400 watts) 

Emissivity measurement apparatus

 

  

                         

Heater input to black plate W1

V1 x I1

watts Heater input to test plate W2

V2 x I2

watts Diameter of the

plates (Aluminum)

160 mm (Test plate and Black

plate) Capacity of

heater 200 W each 

Voltmeter 0 -100/200 V 

Ammeter 0-2 Amps Dimmerstat for

plates 0 – 2

Amps, 0 – 260 V 

Enclosure size 580 mm x 300 mm x 300 mm

Thermocouples ChromelAlumel – 3

Nos 

Page 10: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Stefan-Boltzman apparatus

 

Hemispherical enclosure diameter

200 mm

Base plate, bakelite diameter

240 mm

Sleeve size, diameter

44 mm

Test disc, diameter

20 mm

Mass of test disc (m)

0.005 kg

Specific heat, Cp of the test

disc

0.41868 kJ / kg °C (or) 0.1 kcal /

kg°C No. of

thermocouples mounted on B

4 Nos

No. of thermocouples mounted on D

1 No.

Temperature indicator digital

0.1°C L.C 0 - 200°C

Immersion water heater of suitable capacity

1.4 kW

Vapour compression Refrigeration test rig

                      

 

System Vapour compression

system Refrigerant Freon-12 Compressor 1/3 hp

reciprocating type

Speed 2850 rpm Bore

diameter 25.4 mm

Stroke length

22.2 mm

Page 11: SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING … · 2015-03-20 · SRI VENKATESWARA COLLEGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING THERMAL

Vapour compression Air conditioning test rig

System Vapour compression

system Refrigerant Freon-22 Capacity 1 Ton

Speed 2850 rpm Duct size 0.2775 m x

0.175 m

 


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