Smart Grids, Energy Efficiency and Renewable
Energy Sources in Urban Areas: the “Smart
Polygeneration Microgrid” of the Un...
Outline of the presentation
•

The Savona Campus: a research & teaching facility of the

University of Genoa
•

The Smart ...
The Savona Campus: a R&T facility of the University of Genoa
•
•

•

•

50,000 square meters
courses from the Faculties
of...
The Smart Polygeneration Microgrid (SPM) Project
•

Special project in the energy sector funded by the Italian Ministry of...
The Smart Polygeneration Microgrid (SPM) Project

SPM one-line diagram:
- 400 V distribution system
(ring network, 500m lo...
The Smart Polygeneration Microgrid (SPM) Project
planning
& management

DEMS

SPM planning,
supervision &
control system

...
The Smart Polygeneration Microgrid (SPM) Project

SPM
ICT infrastructure

CP EXPO Community Protection 2013

Genova, 30-10...
The Smart Polygeneration Microgrid (SPM) Project

Main goals:
• to build a R&D facility test-bed for both renewable and fo...
The Smart Energy Building (SEB) Project
•

Special project in the energy efficiency sector funded by the Italian Ministry ...
SPM & SEB inside the Savona
Campus of the University of
Genoa
• SEB is an “active load” of the SPM

SEB is an energy “PROS...
CP EXPO Community Protection 2013

Genova, 30-10-2013
CP EXPO Community Protection 2013

Genova, 30-10-2013
Storage-related research activity
• SPM OPTIMAL SCHEDULING
DEMS uses
o costs and revenues functions;
o forecast of electri...
Storage-related research activity
PV Production & Demands

Production from
dispatchable sources

Storage state of charge v...
Economic & Environmental Analysis

• Two different scenarios are considered

AS-IS
Without SPM & SEB

TO-BE
With SPM & SEB...
AS-IS scenario: energy consumptions and operating costs

Including also
maintenance
cost

CP EXPO Community Protection 201...
TO BE scenario: share of electricity and heat generation

ELECTRICITY
˜ 37% delivered by
SPM and SEB
generation units

HEA...
SPM / SEB energy consumption and production
Assumptions:
-winter operation for mGTs,
2000 hours at rated power

-absorptio...
Calculation of the total operating costs for the 2 scenarios

CT _ AS  IS  EECAS  IS  epp  TECAS  IS  TES pp  Cm _...
Calculation of the total operating costs for the 2 scenarios

CP EXPO Community Protection 2013

Genova, 30-10-2013
Calculation of the CO2 emissions for the 2 scenarios

CO2_ AS  IS  EECAS  IS 
CO2 _ TO  BE  Eel _ Grid 

e f n

e...
Calculation of the CO2 emissions for the 2 scenarios

CP EXPO Community Protection 2013

Genova, 30-10-2013
Economic & Environmental Analysis
Economic and environmental benefits provided by the system SPM + SEB can be
further incr...
Conclusions
• The “Sustainable Energy” R&D infrastructures under construction at the Savona
Campus of the University of Ge...
CP EXPO Community Protection 2013

Genova, 30-10-2013
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Smart Grids, Energy Efficiency and Renewable Energy Sources in urban areas: the “Smart polygeneration microgrid” of the University of Genoa

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by Federico Delfino

University of Genoa - ITALY - Dept. of Electrical, Naval & ICT Engineering

mail: federico.delfino@unige.it

Published in: Technology, Business
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Smart Grids, Energy Efficiency and Renewable Energy Sources in urban areas: the “Smart polygeneration microgrid” of the University of Genoa

  1. 1. Smart Grids, Energy Efficiency and Renewable Energy Sources in Urban Areas: the “Smart Polygeneration Microgrid” of the University of Genoa Federico Delfino University of Genoa - ITALY Dept. of Electrical, Naval & ICT Engineering federico.delfino@unige.it CP EXPO Community Protection 2013 Genova, 30-10-2013
  2. 2. Outline of the presentation • The Savona Campus: a research & teaching facility of the University of Genoa • The Smart Polygeneration Microgrid (SPM) project • The Smart Energy Building (SEB) project • Economic & Environmental Analysis o o • Reduction of annual energy operating costs Reduction of CO2 emissions Conclusions CP EXPO Community Protection 2013 Genova, 30-10-2013
  3. 3. The Savona Campus: a R&T facility of the University of Genoa • • • • 50,000 square meters courses from the Faculties of Engineering, Medicine, and Media Sciences laboratories, research centers and private companies (several operating in the environment &energy field) library, residences, canteen, café, etc… CP EXPO Community Protection 2013 Genova, 30-10-2013
  4. 4. The Smart Polygeneration Microgrid (SPM) Project • Special project in the energy sector funded by the Italian Ministry of Education, University and Research (amount 2.4 M€) • SPM is a 3-phase low voltage (400 V line-to-line) “intelligent” distribution system running inside Savona Campus and connecting: • 2 mCHP Gas Turbine (95kWe, 170 kWth) fed by natural gas; • 1 PV field (80 kWp); • 3 CSP equipped with Stirling engines (3 kWe; 9 kWth); • 1 absorption chiller (H2O/LiBr) with a storage tank; • 1 electrical storage: NaNiCl2 batteries (100 kWh) • 2 PEV charging stations. CP EXPO Community Protection 2013 Genova, 30-10-2013
  5. 5. The Smart Polygeneration Microgrid (SPM) Project SPM one-line diagram: - 400 V distribution system (ring network, 500m long) -five switchboards CP EXPO Community Protection 2013 Genova, 30-10-2013
  6. 6. The Smart Polygeneration Microgrid (SPM) Project planning & management DEMS SPM planning, supervision & control system SICAM supervision & control IEC 61850 field data acquisitions & local automation RTU TM 1703 ACP CP EXPO Community Protection 2013 Genova, 30-10-2013
  7. 7. The Smart Polygeneration Microgrid (SPM) Project SPM ICT infrastructure CP EXPO Community Protection 2013 Genova, 30-10-2013
  8. 8. The Smart Polygeneration Microgrid (SPM) Project Main goals: • to build a R&D facility test-bed for both renewable and fossil energy sources • to promote joint scientific programs among University, industrial companies and distribution network operators  Day-ahead production scheduling of dispatchable sources and storage exploiting renewables forecast and optimization techniques • to optimize thermal & electrical energy consumptions, minimizing the CO2 emissions, annual operating costs and primary energy use of the whole University Campus CP EXPO Community Protection 2013 Genova, 30-10-2013
  9. 9. The Smart Energy Building (SEB) Project • Special project in the energy efficiency sector funded by the Italian Ministry for Environment (amount 3.0 M€) • SEB is an environmentally sustainable building connected to the SPM, equipped by renewable power plants and characterized by energy efficiency measures: • Geothermal heat pump • PV plant on the roof (20 kWp) • Micro wind turbine (horizontal axis, 3 kW) • High performance thermal insulation materials for building applications • Ventilated facades CP EXPO Community Protection 2013 Genova, 30-10-2013
  10. 10. SPM & SEB inside the Savona Campus of the University of Genoa • SEB is an “active load” of the SPM SEB is an energy “PROSUMER” CP EXPO Community Protection 2013 Genova, 30-10-2013
  11. 11. CP EXPO Community Protection 2013 Genova, 30-10-2013
  12. 12. CP EXPO Community Protection 2013 Genova, 30-10-2013
  13. 13. Storage-related research activity • SPM OPTIMAL SCHEDULING DEMS uses o costs and revenues functions; o forecast of electric and thermal energy demand; o operative constraints (equipment ratings, maximum power ramp, etc.); o forecast of the renewable units production by resorting to weather services and historical records to compute a scheduling for dispatchable sources including storage, which minimizes the daily energy costs. The optimization process has a time-horizon of 1 day (typical of a day-ahead energy market session), subdivided in 15 minutes time-intervals. The optimization method is based on linear programming. • This research line results at the storage level in an automatic production shifting application CP EXPO Community Protection 2013 Genova, 30-10-2013
  14. 14. Storage-related research activity PV Production & Demands Production from dispatchable sources Storage state of charge variation on a typical winter day CP EXPO Community Protection 2013 Genova, 30-10-2013
  15. 15. Economic & Environmental Analysis • Two different scenarios are considered AS-IS Without SPM & SEB TO-BE With SPM & SEB • Electrical Energy → National Grid • Thermal Energy → 2 boilers (gas,1000 kWth) • Electrical Energy → National Grid + SPM + SEB • Thermal Energy → 2 boilers + SPM + SEB CP EXPO Community Protection 2013 Genova, 30-10-2013
  16. 16. AS-IS scenario: energy consumptions and operating costs Including also maintenance cost CP EXPO Community Protection 2013 Genova, 30-10-2013
  17. 17. TO BE scenario: share of electricity and heat generation ELECTRICITY ˜ 37% delivered by SPM and SEB generation units HEAT ˜ 25% delivered by SPM and SEB generation units CP EXPO Community Protection 2013 Genova, 30-10-2013
  18. 18. SPM / SEB energy consumption and production Assumptions: -winter operation for mGTs, 2000 hours at rated power -absorption chiller turned off CP EXPO Community Protection 2013 Genova, 30-10-2013
  19. 19. Calculation of the total operating costs for the 2 scenarios CT _ AS  IS  EECAS  IS  epp  TECAS  IS  TES pp  Cm _ AS IS CT _ TO  BE  Eel _ Grid  e pp  Eth _ Boiler  TES pp  Cm _ TO  BE    Eel _ SPM  Eel _ SEB    e f   k  C 65, C 30 M f _k  p f _k where: Eel _ Grid  EECAS  IS  Eel _ EHP  Eel _ SPM  Eel _ SEB   Eel _ SEB  Eth _ Boiler  TECAS  IS  Eth _ SPM  Eth _ SEB; Mf_k = m3 natural gas used by each mGT and Cm and pf being respectively the maintenance cost and the natural gas price for the mGTs CP EXPO Community Protection 2013 Genova, 30-10-2013
  20. 20. Calculation of the total operating costs for the 2 scenarios CP EXPO Community Protection 2013 Genova, 30-10-2013
  21. 21. Calculation of the CO2 emissions for the 2 scenarios CO2_ AS  IS  EECAS  IS  CO2 _ TO  BE  Eel _ Grid  e f n el _ Grid e f n el _ Grid  TECAS  IS  e f  NG  O f Boiler  LHV  Eth _ Boliler   e f  NG  O f   +  M f _k  Boiler  LHV k C 65,C 30  where: ef-n = 0.465 tCO2/MWhel (the emission factor of the Italian electrical mix); ηel_Grid =0.9 (national electrical grid efficiency); ef-NG = 1.961·10-3 tCO2/m3 (natural gas emission factor); Of = 0.995 (natural gas oxidation factor); LHV=9.7·10-3 MWhpe/m3 (natural gas lower heating value). CP EXPO Community Protection 2013 Genova, 30-10-2013
  22. 22. Calculation of the CO2 emissions for the 2 scenarios CP EXPO Community Protection 2013 Genova, 30-10-2013
  23. 23. Economic & Environmental Analysis Economic and environmental benefits provided by the system SPM + SEB can be further increased by: • using the mGTs in trigeneration asset (resorting to the absorption chiller) in order to cool the library of the Savona Campus (now cooled by means of an electrical heat pump) during summer months (+ 600 working hours for the mGTs with respect to the examined case) CP EXPO Community Protection 2013 Genova, 30-10-2013
  24. 24. Conclusions • The “Sustainable Energy” R&D infrastructures under construction at the Savona Campus of the University of Genoa have been described and the main research lines that can be investigated by means of their use have been outlined • An approach has been presented to assess the Campus operating costs, CO 2 emissions and primary energy saving on a yearly time-scale • It has been shown that the Smart Polygneration Microgrid (SPM) and the Smart Energy Building (SEB) contribute to increase the overall energy efficiency of the Campus, lowering its environmental impact • It should be underlined that the revenues obtained by the improved energy performances of the whole Campus can be then employed to financially support research activities and to yearly upgrade the two pilot plants SPM + SEB CP EXPO Community Protection 2013 Genova, 30-10-2013
  25. 25. CP EXPO Community Protection 2013 Genova, 30-10-2013

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