Table 4 Summary of all system parameters and their classification after the system analysis (own illustration)
Number | System parameter | AS | PS | Category in system analysis | Comment |
|---|---|---|---|---|---|
1 | Mix of functions | 22 | 3 | Active | Driver II |
2 | Share of open space | 14 | 6 | Buffering | Effect is covered by heat consumption density |
3 | Potential of compacting and extension | 19 | 7 | Active | Driver V |
4 | Building density | 18 | 5 | Active | Driver VI |
5 | Population density | 16 | 6 | Active | Driver VII |
6 | Density of workplaces | 19 | 6 | Active | Driver IV |
7 | Building type | 25 | 4 | Active | Driver I |
8 | Thermal insulation potential | 19 | 2 | Active | Driver III |
9 | Thermal building standard (insulation) | 15 | 1 | Buffering | Effect is covered by heat consumption density |
10 | Location(s) of the heat source(s) | 12 | 18 | Passive | Depending on local situations, not generically operable |
11 | Routes of the heating grid | 12 | 24 | Passive | Depending on local situations, not generically operable |
12 | Environmental effects of the district heating supply | 12 | 23 | Passive | Depending on local situations, not predictable, not generically operable |
13 | Environmental effects of alternatives to the DH supply | 8 | 12 | Buffering | Depending on local situations, not predictable, not generically operable |
14 | Heat consumption density | 12 | 9 | Buffering | indicator 1 |
15 | Cooling energy consumption density | 11 | 9 | Buffering | Included in heat consumption density and temperature level |
16 | Number of full load hours | 11 | 4 | Buffering | Indicator 2 |
17 | Used heat source(s) | 16 | 23 | Critical | Driver VIII, part of indicator 3 |
18 | Unused heat source(s) | 13 | 24 | Passive | Part of indicator 3 |
19 | Spatial and timely distribution of heat gains | 13 | 16 | Passive | Not stable, not predictable, not generically operable |
20 | Existence of alternatives to the supply by district heating | 14 | 22 | Passive | Depending on local situations, not predictable |
21 | Using temperature cascades | 12 | 20 | Passive | Effect is covered by temperature level and full load hours |
22 | Choice of materials and recyclability | 12 | 8 | Buffering | Individual decision of grid operator, not predictable, not generically operable |
23 | Required security of supply | 9 | 18 | Passive | Individual decision of grid operator, not predictable, not generically operable |
24 | Temperature level | 15 | 15 | Buffering | Indicator 4 |
25 | Losses of heating (and cooling) energy | 6 | 23 | Passive | Effect is covered by heat consumption density and temperature level |
26 | Condition and remaining lifetime of the grid | 10 | 10 | Buffering | Individual situations, not generically operable |
27 | Required reparability | 7 | 5 | Buffering | Individual situations, not generically operable |
28 | Required adaptability to the heat demand | 12 | 10 | Buffering | Individual situations, not generically operable |
29 | Costs of construction, maintenance, and deconstruction | 13 | 24 | Passive | Not stable, not predictable, not generically operable |
30 | Operating costs | 7 | 27 | Passive | Not stable, not predictable, not generically operable |
31 | Economic feasibility and payback period | 10 | 30 | Passive | Not stable, not predictable, not generically operable |