**2. PM of SETS**

In the PM of SETS, the structure of the temperature-based energy flow of the SETS is proposed in Section 2.2. (Principle). The heat conduction of SETS is described in Section 2.3. (Thermal Energy Storage). The heat transfer formulas of the heat exchanger are given in Section 2.4.1 (Heat Transfer). The Formula (14) is developed by the authors in Section 2.4.2 (Customers Heating). The behavior extraction of SETS is firstly considered in the model.
