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distribuited generation


Distributed generation allows to exploit energy resources locally. Through the implementation of “SMART GRID concept” it is possible to produce and consume energy locally in the user’s proximity (km 0). User and producer are then coincident depending on the availability of sources and energy flows.

District heating – District cogeneration

QUESTIONS

1. Which sources?
2. Which technologies?
3. Which fuels?
4. Which power plant size?
5. What is the «STATE OF THE ART»?

ANSWERS

1. RENEWABLES, ENERGY EFFICIENCY, FOSSIL FUEL (mix)
2. PV, CSP, Thermal Solar, Biomass power plant, fuel cells…
3. BIOMASS, WASTE GREEN, WASTE
4. 50 kWe – 10 Mwe
5. See next slides

Where & What?

WHERE?

1. Domestic;
2. Farm & collectivity (waste green);
3. Collectivity;
4. Industries;

ENERGY SOURCES7TECHNOLOGY

1. PV, thermal solar, little size cogenerators
2. Biomass;
3. Waste, green urban waste;
4. Energy efficiency, cogeneration, fossil fuel;

ELECTRICAL EFFICIENCY:

big power plant vs little/medium size power plant

TODAY – BIG POWER PLANTS

Big power plant (200 – 900 MWe) High electrical efficiency (45 – 54 %)

TODAY – Little and Medium power plants

Little/medium power plant (50 kWe – 10 MWe) Electrical efficiency (8 – 35 %)

ELECTRICAL EFFICIENCY:

COMBUSTION – multifuel – 50 kWe – 10 Mwe: 6 – 18% efficiency

PIROGASSIFICATION – high quality biomass chips @ 10%humiidity – 200 kWe – 10 MWe size – 35% efficiency

targets

USE OF LOW QUALITY FUEL available @ km 0 – LOW QUALITY BIOMASS and WASTE

GENERATION with MACHINE WITH HIGH ELECTRICAL EFFICIENCY also for LITTLE SIZE power plant

Little and medium size power plant

DISTRIBUITED GENERATION

sc02

Through a cycle SCO2 can be given value to locally available organic material (MSW, green waste, biomass) and the traditional fossil fuel in cogeneration (natural gas) with electrical conversion efficiencies much higher than at today.
The S-CO2 cycle can therefore supply residual heat to a steam turbine in combined cycle configuration in order to valorize the heat still available.
Finally a sequestration system allows the recovery of CO2 exhaust emission reducing to zero CO2 emissions.