A3_Ehrlén

464 views
431 views

Published on

Published in: Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
464
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
19
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

A3_Ehrlén

  1. 1. Polygeneration in Växjö Beneficial for all; Customer, Environment and Energy Company Presentation at Local Renewables In Freiburg June 14th 2007
  2. 2. <ul><li>Växjö is centrally located in the southern part of Sweden </li></ul>Where is Växjö?
  3. 3. Why VEAB starts RES cooling ? <ul><li>Increased demand of cooling in new buildings </li></ul><ul><li>Increased competition from heat pumps </li></ul><ul><li>Possibility to start electricity production in summer </li></ul><ul><li>High price on electricity gives low margin cost on heat </li></ul><ul><li>Distribution network already existing </li></ul>
  4. 5. Cooling Växjö: EU-project Concerto <ul><li>Step 1 - Absorbtion cooling at VEAB </li></ul><ul><li>Step 2 – Absorbtion cooling to the University and the Central Hospital in Växjö </li></ul><ul><li>Step 3 - Absorbtion cooling without grants </li></ul>
  5. 6. First step at VEAB <ul><li>Absorbtion machine at CHP </li></ul><ul><li>Cooling capacity 300 kW </li></ul><ul><li>Cooling duct to office </li></ul><ul><li>Free cooling in ”winter” ~75 kW </li></ul><ul><li>Absorbtion cooling in summer </li></ul>
  6. 7. Vidéum (Växjö University) <ul><li>Existing network for cooling </li></ul><ul><li>Cooling capacity 2 000 kW. </li></ul><ul><li>Cooling by cooling towers </li></ul><ul><li>Start of operation May 2009 </li></ul><ul><li>Grants from Concerto </li></ul><ul><li>and Swedish Government </li></ul>
  7. 8. Cooling at Växjö Central Hospital optional <ul><li>Absorbtion cooling 3000 kW </li></ul><ul><li>Cooling from Lake Växjösjön </li></ul><ul><li>Environmental permits required (2 years) </li></ul><ul><li>Start of operation hopefully in May 2009 </li></ul>
  8. 9. Temperature increase in Lake Växjösjön; summer
  9. 10. Temperature increase; winter
  10. 11. Future market
  11. 12. Cooling production Existing system
  12. 13. Cost for cooling in existing system
  13. 14. One mounth shutdown period
  14. 15. How electric certificates influence on the cost
  15. 16. Influence from new CHP
  16. 17. Absorption share in cooling <ul><li>Present situation 40% </li></ul><ul><li>Shutdown period reduced 75 % </li></ul><ul><li>With another CHP 90 % </li></ul>
  17. 18. Lay-out main market
  18. 19. Energy profile main market
  19. 20. Energy production in Växjö
  20. 21. Energy production at Sandviksverket in Växjö 220 GWh 190 GWh Electricity production 607 GWh 581 GWh Heat production With cooling Without cooling
  21. 22. Växjö Energi AB
  22. 23. GWh 07-01-16 Fuel mix at the Sandvik plant
  23. 24. CO2 emissions from oil combustion Emissions in tonnes CO2 (carbon dioxide) 6 300 183 000 Actual emissions from oil combustion Theoretical emissions from the combustion of oil alone and equivalent energy production 13 000 196 000 201 000 8 000 060322 199 000 3 700
  24. 25. <ul><li>? </li></ul>

×