Optimal Hierarchical Decision-Making for Heat Source Selection of District Heating Systems

Table 10

The environment benefits of alternatives.

Items	Oil-fired; boiler	Gas-fired; boiler	Coal-fired; boiler	Ground source; heat pump	Water source; heat pump
	1.02	2.2445	0	2.689	2.3405
	2.8465	1.398	4	0.9625	0.087
	−1.8265	0.8465	−4	1.7265	2.2535
	—	0.3756	—	0.7661	1