## 3 Analyzing Systems Improvement Programs
### Minimize the Power Consumption of the Device
This makes it possible to save non-renewable energy. As air is an inexhaustible renewable energy source, air source heat pumps can significantly  
Figure 11: Outdoor ambient temperature \(-\)20 \({}^{\circ}\)C and temperature distribution in the room when electric heating is used. Figure 10: Outdoor ambient temperature \(-\)30 \({}^{\circ}\)C and temperature distribution in the room when electric heating is used. reduce carbon dioxide emissions during winter heating or even achieve zero emissions. In comparison to electric heaters that consume non-renewable energy, such as electricity and gas, to produce heat, air source heat pumps can generate several times more heat under the same electrical energy input. They are energy-efficient, safe, and have adjustable heating capabilities at a lower cost [25]. Therefore, the air source heat pump combined with a fan coil is being considered as a replacement for electric heating in the main control building. According to the \"Fire Protection Standard for Design of Thermal Power Plants and Substations\" GB50229-2019 [26], heating pipes must not pass through rooms containing electrical equipment, such as transformer and distribution device rooms. As a result, separate heating must be provided to the 10 kV equipment distribution room and secondary equipment room. The terminal heating is achieved through fan coil units. Regardless of the type of heating used, it is crucial to maintain a stable indoor temperature and humidity environment. To achieve this, an air source heat pump can be installed to simulate the temperature field inside the substation. Figure 12 illustrates the indoor temperature distribution when a fan coil is used at an outdoor ambient temperature of \(-20\)\({}^{\circ}\)C. The figure illustrates that the indoor temperature distribution is more uniform with this heating method compared to direct electric heating. This method can adjust indoor temperature and humidity changes by detecting indoor and outdoor temperature changes and adjusting the indoor supply wind speed and heating temperature of the air source heat pump. In accordance with the standard GB/T25127.1 [27] for low ambient temperature air source heat pump (water chilling) packages--Part 1: Heat pump (water chilling) packages for industrial and commercial and similar applications, the energy efficiency ratio of the system at \(-25\)\({}^{\circ}\)C is determined to be 1.8. This means that for every 1 kW of electricity consumed, the system is capable of producing 1.8 kW of heat. It is important to note that the performance of the air source heat pump system is significantly influenced by the ambient temperature. As the ambient temperature rises, the heating energy efficiency ratio of the system also increases. The use of an air source heat pump system can provide real-time adjustment of indoor temperature and other parameters, reduce personnel requirements, and save at least 55% of annual electricity consumption. As stated in Section 3.1, solar radiant panels generate an average of 18.748 MWh of power annually, while the annual heat consumption for heating and cooling, calculated in Section 2, is 19.425 MWh and 2.524 MWh, respectively. When using electric heating, the solar power generated annually can meet 96.51% of the annual heating heat consumption. If the air source heat pump requires no more than 65.04% of the annual power generated by the photovoltaic system, it can satisfy the annual cooling and heating needs. However, Figure 13 shows that the monthly power generation of the solar photovoltaic system does not align with the cooling and heating demands. Therefore, while the building has achieved near-zero-energy consumption in terms of total energy usage, it is necessary to fully achieve this goal by increasing the installed capacity of the photovoltaic system and reducing the heat load required for winter heating. Figure 12: When the outdoor temperature drops to \(-20\)\({}^{\circ}\)C, an air source heat pump is used to distribute heat throughout the room.