Research Article

Synthesis of Trigeneration Systems: Sensitivity Analyses and Resilience

Table 10

Sensitivity analyses for hourly differentiation in the feed-in tariff.

ScenarioSR0SR15SR20BASE
Time-of-delivery ratio (TDR) 1.01.52.02.0

System composition
 Gas engines 3343
 Hot water boilers 3323
 Heat exchangers 4454
 Absorption chillers 1121
 Mechanical chillers 3323
 Cooling towers 3443

Natural gas (total) MWh/yr37,32432,81239,32631,235
Purchased electricity MWh/yr290029
Sold electricity MWh/yr11,389955512,3848884
Natural gas (cogeneration) MWh/yr36,63832,11039,09230,384
Cogenerated electricity MWh/yr14,95413,10615,93112,402
Cogenerated useful heat MWh/yr8602858993798393

Primary energy savings %10.0112.8610.5013.59
Equivalent electrical efficiency %55.22 58.1055.6858.89

Annual fixed cost €/yr510,830516,580616,975510,830
Cost of natural gas €/yr933,092820,293983,159780,864
Cost of electricity €/yr3207003207
Profit with the sale of electricity €/yr−876,960−768,094−1,067,473−744,619

Annual total cost €/yr570,169568,780532,662550,282