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2.3.2 Recapitulate Summarising of the results is presented in table 2. The real peak load time was in 2000 for electricity 2893 hours and for heat 3627 hours. CHP plants were driven also only in heat production mode passing the turbine. If the annual peak load time is 6000 h, the electricity production increases more than double and heat production 66%. When annual peak load is 2000 h, on the contrary electricity production is 31% and heat production 45% less than it was in 2000. If peat, bio fuels and natural gas increase CHP capacity the electricity will be increased by 15% and the heat by 18%. Correspondingly production of electricity and heat increases 31%, when the annual peak load is 6000 h. If peak hours is 2000 h/a, the CHP capacity will be increased 57% in electricity and 55% in heat and correspondingly production of electricity will be increased 39% and heat 31%. If energy production by oil fuel and coal fired heat only boilers will be changed to bio fuel, the capacity will be increased 12% in electricity and 14 % in heat with annual peak load of 6000 hours. Correspondingly the capacity will be increased 35 and 33% with annual peak load of 2000 hours. The production will be increased 25% in electricity and 23% in heat with peak load of 6000 h/a and correspondingly 24 and 18% with 2000 h/a. Together the extra use of biofuel and changing oil fuels to bio fuel used in new CHP units the capacity of CHP could be increased 30% compared to CHP capacity in 2000. The CHP production will be increased 54% with 6000 hours of peak load time. If 2000 hours peak load is required, extra CHP capacity of 90% could be built and production could be increased 55%. Table 2. Evaluation of extra CHP capacity compared to existing capacity in 2000, if CHP capacity will be installed based on bio fuels and changing oil fired CHP production to biofuel. CHP energy production tpeak = 6000 h 2000 h e 2893 Electricity Heat Electricity Heat OBS. ! h 3617 MW GWh MW GWh MW GWh MW GWh Existing CHP s Existing CHP s Extra potential; all fuels Extra potential: bio fuels Extra pot.: loil,hoil,coal =>bio 4 128,1 4 128,1 941,3 610,9 500,8 11 944,0 24 768,6 5 647,9 3 665,5 3 005,0 5 670,8 5 670,8 1 670,1 1 044,0 778,8 20 512,9 34 024,8 10 020,7 6 263,9 4 673,1 4 128,1 4 128,1 3 685,2 2 343,8 1 422,8 11 944,0 8 256,2 7 370,5 4 687,6 2 845,6 5 670,8 5 670,8 5 010,3 3 132,0 1 878,3 20 512,9 11 341,6 10 020,7 6 263,9 3 756,7 tabl4/tabl1, SKY calculated t peak calculated t peak % incresing compared to basic case CHPs, changing p.h. time Extra potential; all fuels Extra potential: bio fuels Extra pot.: loil,hoil,coal =>bio 1,000 2,074 0,228 0,473 0,148 0,307 0,121 0,252 1,000 1,659 0,295 0,489 0,184 0,305 0,137 0,228 1,000 0,691 0,893 0,617 0,568 0,392 0,345 0,238 1,000 0,553 0,884 0,489 0,552 0,305 0,331 0,183 Two last rows total 0,269 0,558 0,321 0,533 0,912 0,631 0,884 0,489 It is noticeable that in evaluation the potential of extra CHP capacity no economical aspects were included. 23PDF Image | Small-scale biomass CHP Finland Denmark and Sweden
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