Research Article
Synthesis of Trigeneration Systems: Sensitivity Analyses and Resilience
Table 2
Results for optimal trigeneration system (base case) and conventional system.
| | System composition | Conventional system | Trigeneration system | | Number | Total power | Number | Total power |
| | Gas engines | — | — | 3 | 1739 kW | | Hot water boilers | 6 | 3420 kW | 3 | 1710 kW | | Heat exchangers | — | — | 4 | 1600 kW | | Absorption chillers | — | — | 1 | 490 kW | | Mechanical chillers | 4 | 1960 kW | 3 | 1470 kW | | Cooling towers | 3 | 3000 kW | 3 | 3000 kW |
| | Natural gas (total) MWh/yr | 8703 | 37,324 | | Purchased electricity MWh/yr | 3572 | 29 | | Sold electricity MWh/yr | — | 11,389 | | Natural gas (cogeneration) MWh/yr | — | 36,638 | | Cogenerated electricity MWh/yr | — | 14,954 | | Cogenerated useful heat MWh/yr | — | 8,602 |
| | Primary energy savings % | — | 10.01 | | Equivalent electrical efficiency % | — | 55.22 |
| | Annual fixed cost €/yr | 219,650 | 510,830 | | Cost of natural gas €/yr | 217,582 | 933,092 | | Cost of electricity €/yr | 366,951 | 3207 | | Profit with the sale of electricity €/yr | — | −876,960 | | Annual energy cost €/yr | 584,534 | 59,339 |
| | Annual total cost €/yr | 804,184 | 570,169 |
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