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HYDRO ENERGY POTENTIAL OF COOLING WATER AT THE THERMAL
POWER PLANTVladimir D. Stevanovic*), Aleksandar Gajic*), Ljubodrag Savic**),
Vladan Kuzmanovic**), Dusan Arnautovic***), Tina Dasic**), Blazenka Maslovaric*), Sanja Prica*), Bojan Milovanovic**)j j
*)Faculty of Mechanical Engineering, University of Belgrade **)Faculty of Civil Engineering University of Belgrade)Faculty of Civil Engineering, University of Belgrade
***)Electrotechnical Institute “Nikola Tesla”
ELEKTRANE 2010, Vrnjačka Banja1
A HYDRO POWER PLANT WITH A GENERATION CAPACITY OF 7 5 MWE USES THE AVAILABLE HYDRO ENERGY OF THE SEA7.5 MWE USES THE AVAILABLE HYDRO ENERGY OF THE SEA
WATER, WHICH SERVES AS A COOLANT FOR EIGHT UNITS OF A THERMAL POWER PLANT IN SOUTH KOREA
Reduction of carbon emissionsReduction of carbon emissions by 13715 tons annually.
ELEKTRANE 2010, Vrnjačka Banja2
A PLANT WITH TWO HYDRO TURBINES WITH A POWER OF 5 MWe EACH HAS BEEN BUILT AT THE KOZLODUY NUCLEARMWe EACH HAS BEEN BUILT AT THE KOZLODUY NUCLEAR
POWER PLANT IN BULGARIA
ELEKTRANE 2010, Vrnjačka Banja3
THE COOLING WATER SYSTEM AT ONE UNIT OF THE THERMAL POWER PLANT “NIKOLA TESLA B”O O S
ELEKTRANE 2010, Vrnjačka Banja4
AVERAGED WATER LEVEL OF THE RIVER SAVA DURING THE YEAR BASED ON THE 20 YEARS DAILY RECORDS (FROM 1986YEAR BASED ON THE 20 YEARS DAILY RECORDS (FROM 1986
TILL 2006)75
Monthly mean values
74
)
Monthly mean valuesAnnual mean value
73
evel
(m)
72.24 m
72
Wat
er le
71
W
701 2 3 4 5 6 7 8 9 10 11 12
Months
ELEKTRANE 2010, Vrnjačka Banja5
Months
AVERAGED GROSS HEAD FROM THE SURFACE OF THE WATER POOL AT THE PLANT TILL THE RIVER LEVEL DURING THE YEAR
BASED ON THE 20 YEARS DAILY RECORDS (FROM 1986 TILLBASED ON THE 20 YEARS DAILY RECORDS (FROM 1986 TILL 2006)
6 5
5 5
6.0
6.5
4 5
5.0
5.5
ead
(m)
4.0
4.5
Gro
ss h
e
3.0
3.5
G
Monthly mean values Annual mean value
2.51 2 3 4 5 6 7 8 9 10 11 12
M th
Annual mean value
ELEKTRANE 2010, Vrnjačka Banja6
Months
DISCHARGE COOLING WATER CHANNELS FROM THE POOLS AT THE PLANT UNITS TILL THE RIVERTHE PLANT UNITS TILL THE RIVER
ELEKTRANE 2010, Vrnjačka Banja7
HEAD LOSSES
UNIT of TENT B UNIT 1 UNIT 2 UNIT 3
LENGTH OF THE COOLING WATER DISCHARGE CHANNEL
LENGHT L1-4 (m) 470 545 6201)
1) Assumed
HEAD LOSS
UNIT of TENT B UNIT 1 UNIT 2 UNIT 3
(m) 1.19 1.28 1.38g b nH H HΔ = −
ELEKTRANE 2010, Vrnjačka Banja8
DURATION CURVES FOR THE GROSS AND NET HEADS FROM THE WATER POOLS IN THERMAL POWER PLANT UNITS TILL
THE HYDRO POWER PLANT AT THE RIVER SAVA BANKTHE HYDRO POWER PLANT AT THE RIVER SAVA BANK (AVERAGED FOR THE PERIOD FROM THE YEAR 1986 TILL 2006)
7
8Gross headNet head
5
6
(m) ΔH
l
3
4
Hea
d
1
2
00 0.2 0.4 0.6 0.8 1
Annual period (-) 8760 h
ELEKTRANE 2010, Vrnjačka Banja9
p ( ) 8760 h
AVERAGE MONTHLY OVERHAUL PERIODS DURING THE YEAR PER ONE UNIT OF THE THERMAL POWER PLANT “NIKOLA
TESLA B” (AVERAGED FROM THE FIRST CONNECTION TO THE GRID IN 1984 (UNIT 1) AND 1986 (UNIT 2) TILL JUNE 2007)
250
300
200
250
(h)
100
150
Tim
e
0
50
01 2 3 4 5 6 7 8 9 10 11 12
Months
ELEKTRANE 2010, Vrnjačka Banja10
THE REDUCTION OF THE ELECTRICITY PRODUCTION AT THE HYDRO POWER PLANT DUE TO THE OVERHAULS IN ONE UNIT OF THE THERMAL POWER PLANT “NIKOLA TESLA B” (TOTAL
ANNUAL REDUCTION IS 0.3052 GWH OF ELECTRICITY PRODUCTION IN CASE OF NO OVERHAUL PERIODS)PRODUCTION IN CASE OF NO OVERHAUL PERIODS)
0.14
0.1
0.12
(GW
h)
0.06
0.08
ic e
nerg
y
0.02
0.04
Elec
tri
01 2 3 4 5 6 7 8 9 10 11 12
Months
ELEKTRANE 2010, Vrnjačka Banja11
Months
TURBINE’S TYPETURBINE S TYPE FIELD OF
APPLICATION
Reference: Guide on How to Develop a Small Hydropower Plant, European Small Hydropower Association -ESHA, Brussels, Belgium, 2004.
ELEKTRANE 2010, Vrnjačka Banja12
BULB TURBINE
ELEKTRANE 2010, Vrnjačka Banja13
HYDRO POWER PLANT LAYOUT
Legend:1. Cooling water flowg2. The existing outlet structure3. The existing earth channel4. The intake structure with the chamber5. Power house6. Tail water7. Emergency spillway8. Chute9. Gate plateau10 A t h10. Access to powerhouse11. The existing road12. A pipeline for the heating of equipment in the cooling water intakeequipment in the cooling water intake station during extremely cold winter days.
ELEKTRANE 2010, Vrnjačka Banja14
HYDRO POWER PLANT CROSS SECTIONHYDRO POWER PLANT CROSS-SECTION
ELEKTRANE 2010, Vrnjačka Banja15
ANNUAL ELECTRICITY PRODUCTION 1
( )1
08.76el HE rE g V H x dx Eρ η= ⋅ ⋅ ⋅ ⋅ ⋅ − Δ∫&
( )H H H⎧
( )( )
( ) ( )( )
,max ,max
,min ,max
,
,
0
n n n
n n n n
H H x H
H x H x H H x H
H x H
⎧ >⎪
= ≤ ≤⎨⎪ <⎩
ANNUAL ELECTRICITY PRODUCTION IN THE HYDRO
( ) ,min0, n nH x H<⎩
POWER PLANT DEPENDING ON THE NUMBER OF UNITS IN OPERATION
Units of Thermal Power Plant in operation
Unit 1 Unit 2 Units 1+2 Units 1+2+3p
Annual production of electricity Еel, (GWh/ d)
3.88 3.78 7.45 10.83
ELEKTRANE 2010, Vrnjačka Banja16
(GWh/god)
VALUE OF ANNUAL ELECTRICITY PRODUCTION IN THE HYDRO POWER PLANT THAT UTILIZES ENERGY OF THE COOLING
WATER FLOW AT THE COAL-FIRED THERMAL POWER PLANT “NIKOLA TESLA B” VERSUS ELECTRICITY PRICE
1,200,000.001,400,000.00
2 units 3 units
800,000.001,000,000.00
low
(€)
400,000.00600,000.00
Cas
h fl
0.00200,000.00
0 06 0 07 0 08 0 09 0 1 0 11 0 120.06 0.07 0.08 0.09 0.1 0.11 0.12Electricity price (€/kWh)
ELEKTRANE 2010, Vrnjačka Banja17
PRESENT VALUE OF COSTSPRESENT VALUE OF COSTS
P T l S ifi T l C f T l P P Power per unit, Pn (kW)
Total power,
zPn (kW)
Specific cost of
equipment, 'EMI (€/kW)
Total cost of
equipment, IEM=z
'I P (€)
Cost of civil
works, ICV (€)
Total investment,
I (€)
Present value of O&M costs,
C (€)
Present value of
total costs CT (€)
EMI Pn (€) COM (€)Two
turbines,
2
800 1600 1245 1.992.000 1.670.000 3.936.650 944.425 4.881.075
z=2
Three
turbines, 800 2400 1245 2.988.000 1.670.000 5.007350 1.258.600 6.265.950
z=3
ELEKTRANE 2010, Vrnjačka Banja18
INTERNAL RATE OF RETURN AND PAY BACK PERIOD FOR THE HYDRO POWER PLANT PROJECT THAT UTILIZES ENERGY OF THE COOLING WATER FLOW AT THE COAL-FIRED THERMAL
POWER PLANT “NIKOLA TESLA B”
25
30%
) / P
ay
s)2 Units 3 Units
15
20
retu
rn (%
od (
year
s
Internal rate of
10
15
l rat
e of
rac
k pe
rio
Pay back period
return
0
5
Inte
rna ba period
0.06 0.08 0.1 0.12Electricity price (€/kWh)
ELEKTRANE 2010, Vrnjačka Banja19
INTERNAL RATE OF RETURN AND PAY BACK PERIOD DEPENDENCE ON THE TOTAL INVESTMENT COSTS I
35
40
) / P
ay
)
0.8*I 1.0*I 1.2*I* * *
Internal
20
25
30
etur
n (%
)d
(yea
rs Internal rate of return
10
15
20
rate
of r
eac
k pe
riod
Pay back period
0
5
10
Inte
rnal ba
0.06 0.07 0.08 0.09 0.1 0.11 0.12Electricity price (€/kWh)
ELEKTRANE 2010, Vrnjačka Banja20
INTERNAL RATE OF RETURN DEPENDENCE ON THE VALUE OF THE CERTIFIED EMISSION REDUCTION
30(%
) CCER=15€CCER=10€
CCER=6€
25
of re
turn
(
without
15
20
nal r
ate
o without CDM
10
15
Inte
rn
100.06 0.07 0.08 0.09 0.1 0.11 0.12
Electricity price (€/kWh)
ELEKTRANE 2010, Vrnjačka Banja21
CONCLUSIONCONCLUSION
The obtain results show that the project is economically attractive, and it can be realized with standard matured solutions of hydro turbines available at the market.y
ELEKTRANE 2010, Vrnjačka Banja22