Energy planning for an eco-city based on a distributed energy network

Table 4 Comparison between the five suitable technical solution plans

		Solution 1	Solution 2	Solution 3	Solution 4	Solution 5
Total energy consumption (Tce)		295,146	271,374	272,755	282,639	149,380
CO₂ emission reduction rate, %		–	13.8	14.7	12.7	64.6
Clean energy utilization rate, %		6.12	27.1	30.2	32.4	80.4
Renewable energy utilization rate, %		0	0	0	0	20.6
Total investment cost (100 × 10⁶ yuan)		15.0	15.4	16.8	18.3	19.2
Annual operating cost	Fuel cost, × 10⁸ yuan	2.53	2.31	2.39	1.30 (offset power generation income)	0.4 (offset power and steam revenue)
Annual operating cost	Maintenance cost, × 10⁴ yuan	600	500	300	3000	6500
Static investment recovery period, year		9	5	5	8	11

Tce means ton of standard coal equivalent, which is a unit of the Chinese standard unit of energy measurement. It is used for the macro statistics of the energy consumption from various types of energy sources such as coal, oil, natural gas, electricity, etc.
Solution 1: urban central heating (urban heating) + municipal power (cooling, electricity) + gas pipe network (natural gas)
Solution 2: electric refrigerator (cooling) + gas boiler (heating) + municipal power (electricity) + gas pipe network (natural gas)
Solution 3: LiBr direct combustion unit (cooling, heating) + municipal power (electricity) + gas pipe network (natural gas)
Solution 4: CCHP (cooling, heating, electricity) + gas boiler (heating peak shaving) + water cooling unit (cooling peak shaving) + municipal power (electricity) + gas pipe network (natural gas)
Solution 5: multiple distributed energy stations (cooling, heating, electricity) + municipal power (supplementary power supply) + external waste heat source (partial ratio heating) + micro-energy network

ISSN: 2192-0567