## 4 Results
### Situational Analysis  
Based on these seven scenarios, the model simulates the energy, environmental, and economic benefits of retrofitting existing residential buildings in Liaoning Province. The energy consumption of residential buildings in the cold region consists of four parts: centralized heating energy consumption, air conditioning energy consumption, lighting energy \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Scheme** & **Form** & **Parameters** & \begin{tabular}{c} **Parameter Setting** \\ **Change Range** \\ \end{tabular} \\ \hline Baseline scenario & - & \begin{tabular}{c} Keep the initial value of each \\ parameter unchanged \\ \end{tabular} & - \\ \hline Scenario 1 & Policy category & \begin{tabular}{c} 20\% increase in homeowners’ \\ awareness of energy efficiency \\ \end{tabular} & Data from [42] \\ \hline Scenario 4 & Policy category & \begin{tabular}{c} 10\% increase in policy support \\ for enactment \\ \end{tabular} & Data from [8] \\ \hline Scenarios 3 & Market segment & \begin{tabular}{c} 20\% increase in promotion of \\ energy-saving products \\ \end{tabular} & Data from [40,43] \\ \hline Scenario 5 & Market segment & \begin{tabular}{c} 15\% increase in willingness of \\ enterprises to develop \\ \end{tabular} & Data from [49] \\ \hline Scenario 2 & Technical category & \begin{tabular}{c} 20\% increase in energy-saving \\ technological advances \\ \end{tabular} & \begin{tabular}{c} China Statistical Yearbook \\ on Construction \\ \end{tabular} \\ \hline Scenario 6 & Technical category & \
\begin{tabular}{c} 30\% increase in heat transfer \\ coefficient of external walls \\ \end{tabular} & Data from [5] \\ \hline Scenario 7 & Technical category &
\begin{tabular}{c} 10\% increase in heat transfer \\ coefficient of external windows \\ \end{tabular} & Data from [5] \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Scenario parameter settings. consumption, and other electrical equipment energy consumption. Overall, parameter changes in each scenario advance the benefits of residential building energy efficiency retrofits to varying degrees. S1 examines the impact of owners' energy conservation awareness on the energy-saving retrofit of residential buildings, owners' energy conservation awareness to change the behavior of energy use or replacement of high-efficiency appliance, owners' energy conservation awareness to reduce building energy consumption, which in turn reduces the output of carbon emissions to improve the environmental pollution obtained from the environmental benefits, and the economic benefit derived from the replacement of high-efficiency appliances by saving money spent on electricity. This economic benefit comes from the net present value of the difference between the cost of electricity saved by replacing high-efficiency appliances and the cost of buying them. S2 discusses the benefits of building retrofits brought about by advances in energy-saving technologies, which affect all components of energy consumption in residential buildings, and which have contributed to improved energy efficiency in household electrical equipment, especially air conditioners, as well as to reduced heat loss and thermal imbalance in centralized heating systems through information-based intelligent means. In the baseline scenario of the retrofit process, the reduction in energy consumption of the centralized heating system accounts for 35.09% of the total reduction, the reduction in energy consumption of air-conditioning equipment accounts for 28.07%, lighting equipment accounts for 21.05%, and other electrical equipment accounts for about 15.79%. Obviously, the contribution to the reduction in energy consumption is not only dependent on the advancement in energy-saving technologies. The contribution of energy-saving retrofit benefits brought by the variable of energy-saving technology advancement is the most influential among all the set scenarios, so the advancement of technology plays a central role in the practice of energy saving and emission reduction in urban residential buildings.