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

Table 11

Attribute table of technical benefit^*.

Items	Oil-fired; boiler	Gas-fired; boiler	Coal-fired; boiler	Ground source; heat pump	Water source; heat pump
Technical sophistication	4	4	5	3	3
Heat quality	4	4	5	3	3
Safety and suitability	2	3	4	5	5
Local source condition	2	3	2	5	5
Energy utilizing efficiency	3	3	2	5	5

Five-class scale is used here, and the larger is better.