Table 5.
Sensitivity analysis for fam factor.
| fam (yr−1) | 0.10 | 0.15 | 0.20 | 0.25 | 0.30 |
|---|---|---|---|---|---|
| System composition | |||||
| Gas engines | 3 | 3 | 3 | 2 | 2 |
| Hot water boilers | 3 | 3 | 3 | 4 | 4 |
| Heat exchangers | 4 | 4 | 4 | 3 | 3 |
| Absorption chillers | 2 | 2 | 1 | 1 | 1 |
| Mechanical chillers | 2 | 2 | 3 | 3 | 3 |
| Cooling towers | 4 | 4 | 3 | 3 | 3 |
|
| |||||
| Natural gas (total) MWh/yr | 38,028 | 38,028 | 37,324 | 26,847 | 26,847 |
| Purchased electricity MWh/yr | 0 | 0 | 29 | 29 | 29 |
| Sold electricity MWh/yr | 11,712 | 11,712 | 11,389 | 6620 | 6620 |
| Natural gas (cogeneration) MWh/yr | 37,344 | 37,344 | 36,638 | 24,741 | 24,741 |
| Cogenerated electricity MWh/yr | 15,242 | 15,242 | 14,954 | 10,098 | 10,098 |
| Cogenerated useful heat MWh/yr | 9075 | 9075 | 8602 | 7288 | 7288 |
|
| |||||
| Primary energy savings % | 10.74 | 10.74 | 10.01 | 15.08 | 15.08 |
| Equivalent electrical efficiency % | 55.91 | 55.91 | 55.22 | 60.68 | 60.68 |
|
| |||||
| Annual fixed cost €/yr | 261,165 | 391,747 | 510,830 | 520,231 | 624,278 |
| Cost of natural gas €/yr | 950,705 | 950,705 | 933,092 | 671,163 | 671,163 |
| Cost of electricity €/yr | 0 | 0 | 3207 | 3207 | 3207 |
| Profit with the sale of electricity €/yr | −901,838 | −901,838 | −876,960 | −509,717 | −509,717 |
|
| |||||
| Annual total cost €/yr | 310,032 | 440,614 | 570,169 | 684,885 | 788,931 |