## 2 Methods
### Numerical Simulation Based on EnergyPlus  
EnergyPlus can conduct comprehensive energy consumption simulation analysis and economic analysis of buildings' heating, cooling, lighting, ventilation, and other energy consumption [41]. The potential of using EnergyPlus software to simulate a T-wall's performance has been confirmed in previous studies both by our team and by many other scholars [21; 41]. In the present study, EnergyPlus software is used to simulate a single  
Figure 6: Diagram of influencing factors.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Scheme**} & \multirow{2}{*}{**Factor A \({}^{*}\) (mm)**} & \multirow{2}{*}{**Factor B \({}^{*}\) (mm)**} & \multirow{2}{*}{**Factor C \({}^{*}\) (mm)**} & \multirow{2}{*}{**Factor D \({}^{*}\) (mm)**} & \multirow{2}{*}{**Average Indoor Air**} & \multirow{2}{*}{**Energy Consumption**} \\  & & & & & & **(kW-h/m\({}^{2}\))** \\ \hline S1 & 6300 (A1) & 5100 (B1) & 1500 (C1) & 0 (D1) & 10.53 & 7.42 \\ S2 & 6300 (A1) & 6000 (B2) & 2700 (C3) & 900 (D4) & 9.73 & 7.99 \\ S3 & 6300 (A1) & 6900 (B3) & 3900 (C5) & 300 (D2) & 9.45 & 7.83 \\ S4 & 6300 (A1) & 7800 (B4) & 2100 (C2) & 1200 (D5) & 9.33 & 7.60 \\ S5 & 6300 (A1) & 8700 (B5) & 3300 (C4) & 600 (D3) & 9.10 & 7.54 \\ S6 & 7800 (A2) & 5100 (B1) & 9900 (C5) & 900 (D4) & 10.28 & 7.64 \\ S7 & 7800 (A2) & 6000 (B2) & 2100 (C2) & 300 (D2) & 10.59 & 6.62 \\ S8 & 7800 (A2) & 6900 (B3) & 3300 (C4) & 1200 (D5) & 9.91 & 7.00 \\ S9 & 7800 (A2) & 7800 (B4) & 1500 (C1) & 600 (D3) & 10.13 & 6.35 \\ S10 & 7800 (A2) & 8700 (B5) & 2700 (C3) & 0 (D1) & 9.89 & 6.31 \\ S11 & 9300 (A3) & 5100 (B1) & 3300 (C4) & 300 (D2) & 11.00 & 6.53 \\ S12 & 9300 (A3) & 6000 (B2) & 1500 (C1) & 1200 (D5) & 10.91 & 6.14 \\ S13 & 9300 (A3) & 6900 (B3) & 2700 (C3) & 600 (D3) & 10.60 & 6.07 \\ S14 & 9300 (A3) & 7800 (B4) & 3900 (C5) & 0 (D1) & 10.35 & 5.93 \\ S15 & 9300 (A3) & 8700 (B5) & 2100 (C2) & 900 (D4) & 10.18 & 5.85 \\ S16 & 10800 (A4) & 5100 (B1) & 2700 (C3) & 1200 (D5) & 11.27 & 6.16 \\ S17 & 10800 (A4) & 6000 (B2) & 9000 (C3) & 600 (D3) & 10.97 & 5.97 \\ S18 & 10800 (A4) & 6900 (B3) & 2100 (C2) & 0 (D1) & 11.20 & 5.29 \\ S19 & 10800 (A4) & 7800 (B4) & 3300 (C4) & 900 (D4) & 10.59 & 5.61 \\ S20 & 10800 (A4) & 8700 (B5) & 1500 (C1) & 300 (D2) & 10.74 & 5.18 \\ S21 & 12300 (A5) & 5100 (B1) & 2100 (C2) & 600 (D3) & 11.83 & 5.51 \\ S22 & 12300 (A5) & 6000 (B2) & 3300 (C4) & 0 (D1) & 11.54 & 5.29 \\ S23 & 12300 (A5) & 6900 (B3) & 1500 (C1) & 900 (D4) & 11.36 & 5.10 \\ S24 & 12300 (A5) & 7800 (B4) & 2700 (C3) & 300 (D2) & 11.08 & 5.04 \\ S25 & 12300 (A5) & 8700 (B5) & 3900 (C5) & 1200 (D5) & 10.55 & 5.29 \\ \hline \hline \end{tabular}
\end{table}
Table 3: Orthogonal experimental design schemes and results.  
room's indoor temperature and energy consumption in Tibetan dwellings with a T-wall installed, under 25 different room and opening parameters. When simulating indoor air temperature, the building is in a state of natural ventilation. In the simulation of building energy consumption, the EnergyPlus \"IdealLoadSystem\" is considered. Other settings in the numerical simulation are shown in Table 4. The weather data for simulation operations can be downloaded from the official website of EnergyPlus [41]. The authentic and authoritative data is derived from the China Standard Weather Document (CSWD). The simulated period is the coldest month, from 1 January to 31 January in Aba.