Diesel power plant,applications, components of DPP, different systems of DPP, plant layout, performance of DPP,advantages & disadvantages of diesel power plant, environmental impacts of DPP

1. DIESEL POWER PLANT
Prof. Siraskar G.D.
Mechanical engineering department
PCCOE&R

2. Diesel power plant
•Why?
•Emergency
•Stand by
•2 to 50 MW
•Can be used for small power plant like industries
•Advantage:
•Quick installed
•Quick to start
•No worm up period
•Can take load quickly
•Efficient up to small capacity like 100 MW
•Low cooling water required
•Less capital cost
•Efficient at part load
•Less manpower
•Can be used different fuels

3. Disadvantages:
Less capacity
Generating cost per unit is high
Not good for continues over load
High maintenance
More lubricant
Noisy
Life is less
Use:
Central: power station: 5 to 50 MW
Peak load:
Stand by unit
Emergency plant:
Mobile plant
Small industries power plant
Nursery station

6. 837 MW : 2018, 0.24 %

7. Sect
or
Thermal (MW)
Nucl
ear
(MW)
Renewable (MW)
Total
(MW)Coal Gas
Dies
el
Sub-
Total
Ther
mal
Hydr
o
Othe
r
Rene
wabl
e
Sub-
Total
Rene
wabl
e
Centr
al
56,95
5.00
7,237.
91
0.00
64,19
2.91
6,780.
00
12,15
1.42
1,502.
30
13,65
3.72
84,62
6.63
State
63,59
6.50
7,048.
95
363.9
3
71,00
9.38
0.00
29,94
2.00
2,004.
87
31,94
6.87
102,9
56.25
Privat
e
75,54
6.00
10,58
0.60
473.7
0
86,60
0.30
0.00
3,394.
00
67,14
1.44
70,53
5.44
157,1
35.74
All
India
196,0
97.50
24,86
7.46
837.6
3
221,8
02.59
6,780.
00
45,48
7.42
70,64
8.61
116,1
36.03
344,7
18.61
Perce
ntage
56.89 7.21 0.24
64.34
1.97 13.20 20.49 33.69 100

9. Diesel power plant layout

11. Component of diesel power plant:
•Diesel engine and generator
•Engine air intake system
•Exhaust system
•Cooling system
•Engine fuel system
•Lubrication system
•Starting system:

40. Selection of site for diesel power plant:
•Bearing capacity of soil
•Transport facility
•Near load center
•Sufficient quantity of water
•Availability of labour
•Availability of future expansion

46. Formulae:
• I.P. = B.P. / ηm ,
• F.P= I.P- B.P,
• ηm= B.P / (B.P. +F.P),
• B.P at part load = % load * B.P, at full load
•B.S.F.C. = mf /B.P. kg/ kWh ,
• I.S.F.C= mf /B.P kg/ kWh ,
• ηb =B.P / (mf * C.V.),
• indicated thermal efficiency ηt = ηb / ηm ,
• mf = vf * specific gravity * density of water ,
•air fuel ratio = ma/ mf ,
•ηb= brake thermal efficiency = B.P / (mf * C.V),
•ηi= indicated thermal efficiency = I.P / (mf * C.V).,
• I.P = PmiLAnK / 60*1000,
•B.P = PmbLAnK / 60*1000,

47. Q. A four stroke engine develops 80 kW at full load having
mechanical efficiency of 80 %. Find the I.P, and F.P. If the
engine is run at constant speed so that friction losses may
be assumed to be constant , find the mechanical efficiency
at 75 %, 50 % and 25 % of the full load . Draw your
conclusion.

48. Q.2) a Four stroke diesel engine consumes 20 kg/hr . When
the engine develops an output of 80 KW, calculate the brake
and indicated specific fuel consumption if the mechanical
efficiency of the engine is 80 %. Also determine the brake and
indicated thermal efficiency if the calorific value of the fuel is
45000 kJ/kg.

49. Q.3) A 4 cylinder , 4 –stroke cycle engine having cylinder
diameter 100mm and stroke 120 mm was tested at 1600 r.p.m.
and following readings were obtained. Fuel consumption = 0.27
liters/ minutes
Specific gravity of fuel =0.74 BP = 31.4 kW, Mechanical
efficiency = 80 %, calorific value of fuel = 44000 kJ /kg.
Determine i) BSFC ii)IMEP iii) Brake thermal efficiency.

50. Q.4) A two stroke diesel engine develops 400 kW output with a
mechanical efficiency of 0.82 . The rate of fuel consumption is
2.4 kg/min and the air –fuel ratio used in the engine is 18:1. The
heating value of the fuel is 41500 kJ/kg. find i) IP ii)F.P ,iii) brake
thermal efficiency iv) indicated thermal efficiency v) fuel and air
consumption per hour.