## 1 Introduction
In addition, an average performance of CCOP = 5.15 (coefficient of performance for the compressor) and SCOP = 4.66 (coefficient of performance for the system) can be achieved. Compared to previous studies, it can be concluded that despite the lower CCOP, a higher SCOP can be achieved due to heat cascade storage and utilization. The new approach described in this paper presents a viable alternative for space heating in North China. For active thermal protection (thermal barrier), we used the following literature as a background:  
[PERSON] et al. [10], 2016, researched and designed a new low-quality energy utilization system, i.e., j pipe-embedded wall integrated with a heat exchanger connected to a ground source, investigating its energy-saving potential in five typical climate regions of China. The study results show that the proposed system's energy saving potential varies depending on the climatic regions. With an equally large system of built-in pipes, building in warm climates achieves the highest percentage of energy savings. It is followed by buildings in a hot summer and cold winter region, a strong cold climate region, a cold climate region, and a hot summer and warm winter region in descending order of energy saving. Meanwhile, a multi-criteria performance evaluation was also carried out in order to find the optimal size of the low-energy system in each climate region. The proposed system can be used in practice to save energy, and the results of the study are helpful in guiding the practical applications of the system of walls inserted into pipes in different climatic regions. [PERSON] et al. [11], 2019, present the results and analysis of research they conducted in an experimental residential building in Nyiregyhaza, Hungary. An innovative system of direct connection of a ground heat exchanger to a wall heat exchanger is installed in the building. The author of this system, [PERSON], was awarded a patent for active thermal insulation of buildings in 2012. The authors address the problem of to what extent an active insulation system can participate in the replacement of standard passive insulation systems. Initial research results show that active thermal insulation has a beneficial effect on improving the insulation performance of the envelope wall. The overall reduction of heat loss through the external wall ranged from 53% to 81% in the periods analyzed from February to November. The equivalent heat transfer coefficient U\({}_{\text{eq}}\) of the analyzed wall depended on the local climatic conditions and was 0.047 W/(m\({}^{2}\cdot\)K) in November and 0.11 W/(m\({}^{2}\cdot\)K) in March, while the standard value of the heat transfer coefficient was 0.282 W/(m\({}^{2}\cdot\)K). The positive research results should be the basis for implementing the innovative system in near-zero energy buildings. [PERSON] et al. [12], 2022, investigated thermal energy storage systems in buildings that can store energy for cooling/heating during off-peak hours or when are renewable energy sources available for later use. In this study, a wall system equipped with an active insulation system and a thermally activated storage system was designed, and its performance for active cooling energy contribution was studied. The performances of energy storage (charging), energy release (discharging) of thermal energy storage, and active insulation systems were studied separately and together as an integrated system. The results showed that the thermal properties of the thermal energy storage core material, the spacing of the pipes embedded in the thermal energy storage, and the hydronic pipes used in the active insulation system had the greatest influence on the wall properties of all the tested parameters of the wall system. The beginning of our team's research activities in the field of CBES dates to 2003/2004.