EX.11 - Load Test-single Cylinder, 2Stroke -Petrol

S.V.C.E.T ME Dept.

THERMAL ENGINEERING LAB

PER'(RMANCE TEST (N 2- STR()E! SINGLE C*LINDER PETR(L ENGINE TEST RIG

Performance Test on 2-Stroe! S"n#$e C%$"n&er Petro$ En#"ne Test R"#

29

S.V.C.E.T ME Dept.

THERMAL ENGINEERING LAB

PER'(RMANCE TEST (N 2- STR()E! SINGLE C*LINDER  PETR(L ENGINE TEST RIG AIM+  To conduct a load test on a single cylinder, 2- Stroke petrol engine and study its

performance under various loads. E,IPMENT  APPARATS+

1. 2-Stroke, Single Cylinder Petrol Engine wit !esistance load "ank 2. Tacometer  #. Stop $atc SPECI'ICATI(NS+

%ake

&

'a(a(

Stroke

&

)*mm

'ore

&

)*mm

!ated !.P.%

&

#+++rpm

utput

&

# p.

uel

&

Petrol

Sp. r. f petrol

&

+.*1/

Calorific 0alue of petrol

&

*1++ 34g

5u"rication

&

#6 mi7ture of self mi7ing oil

and

petrol DESCRIPTI(N+

Tis Petrol engine is an air cooled, single cylinder, 0ertical, 2-stroke engine. Te engine is kick started. Te petrol engine is coupled troug te gear "o7 to a !esistance load dynamometer to a"sor" te power produced. Te speed ratio "etween te engine and "rake drum is )&18Top gear engaged9.

uel consumption is

measured wit a "urette and a stop watc. : tree-way cock, wic regulates te flow of petrol from te tank to te engine.

Performance Test on 2-Stroe! S"n#$e C%$"n&er Petro$ En#"ne Test R"#

30

S.V.C.E.T ME Dept.

THERMAL ENGINEERING LAB

 PR(CEDRE&

1. pen te tree way cock so tat fuel flows to te engine directly from te tank. 2. Start te engine and allow running on no load condition for few minutes. #. 5oad te engine, "y adding weigts on te anger. . ;ote te following readings a9 Speed. "9 $eigt on te anger. c9 Spring "alance. d9 Time taken for 1+ c.c of petrol consumption. ). !epeat te a"ove procedure at different loads. /. Stop te engine after removing load on te engine PRECATI(NS

1.
M(DEL GRAPHS + η' t 0s

'.P    6  ,        t    '

     η

'.P, $

Performance Test on 2-Stroe! S"n#$e C%$"n&er Petro$ En#"ne Test R"#

31

S.V.C.E.T ME Dept.

S.NO

Load on the resistance load bank 

Voltage Volts 1 2 #  ) /

Thermal Engineering lab

Current amp

Speed

RPM

Manometer Manometer reading

h1

h2

h1h2

ime for !" Air head cc of  causing fuel flow (Ha) m of air Se!

.#.$

Heat %nput

&.'

#.'

%.'

"g#hr 

"$

"$

"$

"$

S.V.C.E.T ME Dept.

Thermal Engineering lab

%.S.#.$

&.S.#.$

Actual olume of air a

kg+kw,h

kg+kw,h

m-+s

S.NO

1 2 #  ) /

Mass of air

heoretical olume of air th

kg+s

m-+s

*fficiencies

ol

&th

%th

m

S.V.C.E.T ME Dept.

Thermal Engineering lab

SAMPLE CALCLATI(NS+ h ×  ρ %ater 

1.

 :ir ead causing flow >

????. m of water 

2.

 :ctual volume of air intake>0 a> Cd :+ $ere Cd> +./2

 ρ air  × 100

2 gH a

>

-

 :+> #.1 @ 1+

Π #.

)

Teoretical volume of air > 0 t >

2

D × (s × '

#

m 4Sec

2 × &0 .

0olumetric efficiency >  0olumetric

).

%ass of fuel > A>

/.

10 t

Va

× 100

Vth

+ × 0.*1 1000

!!# se!

'rake power '.P >

V 

×

 I 

×

100

η  g 

η  g  , -0  T . F .C 

*.

'rake specific fuel consumption, 'SC >

B.

ndicated power .P > '.P D .P

E.

ndicated specific fuel consumption, SC >

1+.

'rake termal efficiency,

11.

12.

η' t  > >

ndicated termal efficiency,

%ecanical efficiency,  %ecanical

RESLT+-

C(NCLSI(N+-

T/C

ηm  > >

η

 B. P 

 B. P  m  f   × C v

t

 I . P 

>  >

 B. P   I . P 

m  f   × C v ×

100

??..g 4w-r 

T . F .C   I . P 

??g 4w-r