DTU Power Plant
Transcript of DTU Power Plant
Welcome
Christian Mortensen
Marine engineer
Employed at DONG/DTU since 2/2001
Graduated in Aalborg 12/1998
Background FLS miljøAlfa laval
Who is DONG Energy
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Distribation of Natural gasDistribation of Electricity
What do we do?
District heating and electricity
Electricity for the national grid (50 KV)
District heating for DTU and Holte district heating
Our electricity is expensive but energy efficient
In the bigger power plants some of the heat is wasted
The background for building this plant is that we have a legal advantage, because of our energy efficacy.
We are located here because we are closer to the heat consumers
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The DTU power plant
Type: combined circle power plant (GT + boiler + DT)
commissioned: 1998
Capacity: 31+7 MW electricityog 31 MJ/s heat
Fuel: Natural gas
Start up time: 45 min – 90 min
Total efficacy. 88%
Price US$ 50 mill
Annual revenue US$ 20 mill
Why Combined circle power plant
The plant is small.
The boiler is small compared to a boilers with burners.
Lower temperature on exhaust gasses, which leads to use of less expensive materials for the boilers.
In total cheaper boiler - cheaper plant.
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Production and consummation at DTU power plant
Annual electricity production is about 160 mill kWh, equivalent to consummation in 40.000 households
Annual district heating production is about 130 mill kWh equivalent to consummation in 9.000 House holds
The Natural gas is supplied by the national city grid and the consummation is about 30 mill Nm3 a year
Running pattern
Winter full speed
Spring, Summer and Fall. Start every day. Running when the electricity prices are best, charting the heat accumulator tank. (Kap. 300 MWh)
Monitored from KYV (24/7) (staff present weekdays 7 am – 3 pm) (always one on call)
Annual stop 2-5 weeks a year
Break down 1-5 times a year
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Processen i kraftvarmeværket på DTU
1. Gasturbine 2. Generator 3. Dampkedel4. Dampturbine5. Generator6. Fjernvarmeveksler7. Varmeakkumulatortank
A. Fjernvarme retur (kold)B. Fjernvarme frem (løb)C. El net (10/50kV) D. Naturgas 16bar net E. Fødevand til kedelF. Damp til dampturbine
1. Gas turbine2. Generator3. Boiler 4. Steam turbine5. Generator6. District heating heat
exchanger7. Heat akkumulator tank
Main komponents at the DTU power plant
:)
Volume: 8000 m3
Partly submersed
Diameter: 19,3 meter
Height: 27,4 meter
Energy kap about: 300 MWh
Connected to the open air
Expansion for district heating system
The Gas turbine
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Shaft effiancy: 39%Price about: US$ 8,5 Mill.
•Kompressor m. pitch reg.•Buning chambre•HP-turbine•Power turbine•Start motor
Starting the turbine:
Boiler is ready for start up
Hydraulic motor drives the turbine to 2100 rpm
Flushing the boiler.
Ignition.
warm up of turbine – running towards 9000 rpm
Synchronizing of power turbine / generator.
Powering up towards 31 MW EL
The limitation is the temperature on the first turbine wheel in the power turbine
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Problems concerning the gas turbine
•Very exact tolerances makes warming and cooling time consuming.
•Materials have to withstand high temperatures
•Specialists are needed repair the turbine
Steam turbine
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The boiler
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Dobble drum boiler with economizer and over heater
Common feedwater tank
District heating economizer
HT 35t/h 5000 C 50 bar
LT 8 t/h
Gaskompressorer Nuovo Pignone (Italien)
2 stk 100% maskiner
Stempelkompressorer (rækker-konfig.)
Dobbeltvirkende
2 trins kompressorer
drevet af 300 kW el-motor
Hæver trykket fra net tryk ca 16 bar til ca 32 bar
7000Nm3/h (fuldlast)
Problematiske at drive
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Vand behandling -fra HOH Water Technology – www.hoh.dk
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Blødgøring "fjerner kalk" for beskyttelse
af RO
RO fjerner de fleste salte800 mircoSiemens/cm -
8 microSiemens/cm
Polering med kationbytter og til sidst med mixbed8 mircoSiemens/cm –50 NanoSiemens/cm
Sidste trin: Konditioneringmed NH3 og NaOH (baser for an undgå rust)doserings pumper
Ionbyttermasse
Vi er bange for Især:syrlige salteSilica (Sio2)
MircoSiemens/cm =(1/(ohm*10-6))/cm
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Tekniske data
Questions please ?
What do we do? practical info - safty
Everybody have to follow me at all times, and please do not touch anything
wear a helmet
wear earplugs
The plant is very noisy, so I will only stop for short messages. Questions are welcome but we have 98 dB
It is difficult to see the components, they are incased
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