Table 2.

Optional equipment parameters.

Equipment	Investment cost (yuan/kW)	Operation and maintenance cost (yuan/kW)	Life cycle (year)	Efficiency (−)
CHP	7900	0.06	20	${\eta }_{chp}^e$ = 0.3
				${\eta }_{chp}^h$ = 0.173
GB	400	0.04	30	0.94
EB	1000	0.32	25	0.95
AC	1100	0.08	20	1.3
EC	970	0.097	10	3.5
PV	8000	0.01	20	–
ES	3000	0.0125	20	0.98
HS	320	2.43	20	0.92
CS	320	2.43	25	0.92