Synthesis of Trigeneration Systems: Sensitivity Analyses and Resilience

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