Variable Condition Model and Scheduling Optimization of Heating System Based on Layered Water Tank

Table 1

Modified temperature difference factor.

Serial number	Envelope characteristics	Modified temperature difference factor
1	Exterior walls, roofs, floors, floors communicating with the outdoors, etc.	1.00
2	Stuffy roof and floor slab above nonheating basement connected with outdoor air	0.90
3	Partition wall adjacent to unheated stairwell with external doors and windows (1–6 floors building)	0.60
4	Partition wall adjacent to unheated stairwell with external doors and windows (7–30 floors building)	0.50
5	When there is a window on the external wall of the floor above the heating basement	0.75
6	When the floor above the heating basement has no window on the external wall and is located above the outdoor floor	0.60
7	When the floor above the heating basement has no window on the external wall and is located below the outdoor floor	0.40
8	Partition walls and seismic joint walls adjacent to nonheating rooms with external doors and windows	0.70
9	Partition wall adjacent to nonheating room without external doors and windows	0.40
10	Expansion joint wall and settlement joint wall	0.30