8/19/2019 Aku Punyerrr

1/3

0 2 4 6 8 10 12 14 16 18 20

-0.20

-0.10

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

Compression Ratio, rv VS Thermal Efciency

rc=1

Column K 

Column Q

Column W

Column AC

Compression Ratio,rv

Thermal Efciency

8/19/2019 Aku Punyerrr

2/3

 The Diesel enine !herm"l e#cienc$

Compression Ratio, rv6 18

Cut off ratio, rc 2 5

rc=1   rc=2 rc=3 rc=4

%#cienc$& n %#cienc$& n %#cienc$& n %#cienc$& n

1.4 2 0.24 0.11 0.01 -0.081.4   4   0.43 0.33 0.25 0.18

1.4 6 0.51 0.43 0.36 0.31

1.4   8   0.56 0.4' 0.43 0.38

1.4 10 0.60 0.53 0.48 0.43

1.4   12   0.63 0.57 0.52 0.47

1.4 14 0.65 0.5' 0.55 0.51

1.4   16   0.67 0.61 0.57 0.53

1.4 18 0.6' 0.63 0.5' 0.55

()eci*c+e"!

,"!io& $

Com)ression,"!io& r

1.4io   =

1,

11,Use

1

−

−=

=

γ  η 

v

 Diesel th

c

r 

r 

8/19/2019 Aku Punyerrr

3/3

rc=5

%#cienc$& n

-0.150.13

0.26

0.34

0.3'

0.44

0.47

0.50

0.52