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Innovative cogeneration system for residential purpose combined with eletrical mobility

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An innovative cogeneration system based on SOFC, ground source heat pump (GSHP) and a Stirling engine is proposed for residential purpose combined with electrical mobility.

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Innovative cogeneration system for residential purpose combined with eletrical mobility

  1. 1. THERMODYNAMIC ANALYSIS OF A SHARED COGENERATION SYSTEM AND ELECTRICAL MOBILITY LOCATED IN A NORTHERN EUROPE CLIMATE Giulio Vialetto, Marco Noro and Masoud Rokni
  2. 2. Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES ENERGY REQUEST ELECTRICITY – USER REQUEST HEATING – DHW AND SPACE HEATING ELECTRICITY – ELECTRIC MOBILITY
  3. 3. Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES DME ETHANOL METHANOL AMMONIA NG
  4. 4. Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES WHY DO WE USE DIFFERENT FUELS? WHY DO WE CONSIDER A STIRLING ENGINE? • SOFC are extremely versatile on fuels - They need only to change fuel pre-reformer system • Nowadays each fuel proposed has advantages and disadvantages – No one has been defined better than the others. • Stirling engine is proposed to innovate H/P ratio management • Stirling engine is proposed to boost battery charge of electric cars
  5. 5. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) • Fuel cell system proposed changes with different fuel: ammonia do not need fuel preheater, DME, ethanol and methanol need a methanator while NG requires also a desulphuriser and a CPO • Simulation of an inverter for DC/AC conversion with 92% of efficiency • Energy consumption of auxiliaries is considered with a lower overall efficiency • Stirling engine recover heat from wasted gases only is switched on SOFC
  6. 6. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) SOFC If stirling engine is switched on (LEFT), it recovers heat after burner. Waste heat for space heating and DHW is recover after stirling engine. If stirling engine is switched off (RIGHT), heat is recovered directly after burner.
  7. 7. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) • A water tank is used to store hot water to prevent heat losses if is recovered more heat than user request • Ground source heat pump is used to produce heat when request is higher than heat available from SOFC • An electric heater is used as an auxiliary system for heat peak demand OTHER COMPONENT OF THE SYSTEM
  8. 8. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) Different types of strategies are proposed to achieve high performances of the system: • EEL, Electric equivalent load, this strategy combines heat and electricity demand of user (without electricity request from electric car) to manage SOFC electricity production, considering that a part of the heat demand is covered by ground source heat pump. • CEC, Charging of Electric Car, to prevent electricity consumption from grid when electric car is on charge. • PS, Peak Shaving, this strategy is proposed to shave heat peak demand using heat recovered when electric car is charged. • MSE, Managing Stirling Engine, when to switch on or off stirling engine. It is switched on primarily when waste heat is unused, electric car is on charge or heat demand is low. Otherwise it is switched off. STRATEGIES PROPOSED
  9. 9. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.)
  10. 10. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.)
  11. 11. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) A thermodynamics analysis is performed using %PES benchmark: it compares primary energy consumption of a traditional user and the innovative system proposed with different fuels
  12. 12. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) Energy fluxes for system fueled by natural gas (kWh)
  13. 13. OVERVIEW MODEL ANALYSIS CONCLUSIONSTRATEGIES Thermodynamic analysis of a shared cogeneration system and electrical mobility located in a Northern Europe climate (Vialetto G., Noro M. and Rokni M.) • Even if different fuels are proposed, system proposed could achieve %PES higher than 45% • System proposed has a high versatility on fuels used and user energy request • Electric car is charged using a cogenerator during night when usually electricity request is low: it provides waste heat to use peak hours and reduces both energy request to cover heat demand and reduce nominal power of ground source heat pump • Strategies proposed boost overall efficiency of the system • System proposed could help to manage conversion from traditional system based on fossil fuels to renewable fuels and electric mobility CONCLUSION
  14. 14. THANK YOU FOR YOUR ATTENTION ANY QUESTION? CONTACT E-Mail: giulio@giuliovialetto.it Site: www.giuliovialetto.it

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