Guide: With the development of power production and the improvement of people's living standards, the contradiction between power supply and demand in our city has changed from a lack of electricity to a peak period of power shortage. In recent years, due to the sharp rise in the electricity consumption of urban residents, the power supply to the grid has been under pressure.

At present, the grid power of Tianjin Power Grid is nearly one-third, and the average load rate is declining year by year, which brings difficulties to the production organization of the power grid, which also adversely affects the safety and economic operation of the power grid. Therefore, further tapping the potential of low-voltage grids, controlling the excessive growth of urban air-conditioning load, and shifting the peak load of various operating power units has become an important task in current power management.

In fact, air conditioning cold storage technology can bring double economic benefits to the power sector and users. In the past, the development of this technology was limited due to China’s single electricity price policy. In recent years, with the introduction of the city's peak and valley electricity price policy and the formulation of various policies to encourage the use of air-conditioning and cold storage technology, the city has a good foundation for promoting the technology. The application of cold storage technology has practical significance in China, but it must be seriously demonstrated before using ice storage air conditioning. Kaishan screw air compressor ice storage air conditioning investment in refrigerators, cooling towers, pumps, fans, etc. is 16-30 lower than the non-storage system, while the investment in pipelines, cold storage tanks increased by 30-60.

Therefore, economic analysis should be carried out carefully before using cold storage technology or retrofitting existing projects. In addition, the combination of ice storage and low temperature air supply system is a trend in the application of cold storage technology in building air conditioning. In the United States, this technology is known as the most significant change after the HVAC project relay variable air volume system. If the low-temperature air supply can further take advantage of the cold storage system, it can compete with the non-storage system at the initial investment. It is also worth noting that the traditional ice storage system can save operating costs but not save energy. This is mainly to obtain 0e of ice during the ice-making operation. The evaporation temperature of the refrigerator often needs to be reduced to -8e, resulting in nighttime cold storage. The coefficient of performance of the chiller operation is only 60-70 during the day, causing waste of energy.

In summary, as far as Tianjin is concerned, if the cold storage air conditioning technology can be widely promoted, it will bring considerable social and economic benefits. At present, due to the fact that the peak-to-valley electricity price policy has not been fully rolled out, coupled with the ineffective promotion work and the poor performance of enterprises, the promotion progress of air-conditioning storage technology is not satisfactory. However, the author believes that with the further implementation of the policy of encouraging users to shift peaks and the gradual improvement of the economic situation, through extensive and in-depth publicity, the excellent technology of air-conditioning and cold storage will surely become the primary issue for the central air-conditioning users in the city.