1. Energy Internet and Energy Storage Technology

　　Since this year, two things have been talked about the most in our industry. One is the new electricity reform and the other is the energy Internet. Among them, the new power reform has opened up the country's hundreds of millions of grid markets, paving the way for the development of the energy Internet.

　　Due to the rapid growth of my country's oil dependence on foreign countries and the existence of some hidden security risks in the traditional power grid, the development of an energy Internet based on the interconnection of distributed renewable energy will be the general trend of our future.

　　The so-called energy Internet refers to the integration of a large number of distributed renewable energy power generation devices and distributed energy storage devices on the basis of the existing distribution network, through advanced electronics and information technology, to achieve an efficient energy structure for the flow of energy and information.

　　The main purpose of the Energy Internet is to reduce the cost of energy for us as human beings. In the new energy structure, because renewable energy power generation has the characteristics of intermittent and instability, its power generation will lead to instability of the power supply, and at the same time it will cause a certain impact on the grid. Therefore, a certain proportion of energy storage is required to be stable and stable. The output of renewable energy power stations.

　　In areas where the electricity price difference between peaks and valleys is large, increasing the application of energy storage will make renewable energy more economical. In addition, in the traditional energy system, if energy storage devices are added, it can solve the problem of the time and space mismatch between the current produced energy and the used energy, so as to achieve the purpose of optimizing energy allocation and improving energy efficiency.

　　2. Development prospects of energy storage technology

　　Energy storage is divided into two categories: electrical energy storage and thermal energy storage. Among them, electric energy storage includes battery energy storage, electrical energy storage and chemical energy storage. According to the 2014 energy storage industry white paper, it is estimated that my country's energy storage market may reach 137GW by 2020. However, 99% of my country's energy storage market is currently occupied by pumped storage, which is expected to reach 70GW in 2020. Therefore, we still have 67GW of space, which will be filled by new energy storage methods.

　　At present, the installed capacity of new energy storage in my country is only 81.3 MW. By 2020, there will be more than 1,000 times the market development space for new energy storage technologies. A large number of renewable energy and distributed energy sources are connected, and the proportion of new energy power generation continues to increase. The impact on the grid requires energy storage to participate and solve. Energy storage technology will be a crucial part of coordinating these issues in the future, and the energy storage link will play a key role in the development of the entire future energy Internet.

　　Three, phase change heat storage system

　　If it jumps out of the scope of electricity use, the concept of energy storage can be further extended to heat storage.

　　We have done a comparison between electric energy storage and thermal energy storage: electric energy storage is clean, easy to transmit, flexible and efficient; and the advantages and characteristics of heat storage are to provide users with demand-side cooling and heating differences.

　　heat storage is divided into latent heat storage and sensible heat storage. Latent heat storage is also called phase change heat storage. When the temperature of the phase change material reaches the phase change point during the process of increasing, its physical state changes, and its temperature hardly occurs before the end of the phase change. At the same time, a large amount of phase change heat is released or absorbed, resulting in a relatively wide temperature plateau.

　　Phase change materials can be divided into solid-liquid phase transitions and solid-solid phase transitions according to their physical states. Among them, solid-liquid phase transitions have more applications, and are specifically divided into inorganic, organic and composite phase change materials; according to temperature, they can be divided into low temperature, Normal temperature and high temperature materials, among them, 20℃-200℃ we call normal low temperature phase change materials, and 200℃-1000℃ we call high temperature phase change materials.

　　Four, application case introduction

　　The first case is Zhongrui Industrial Park. This is a key cooperation project between China and the Swiss Ministry of Commerce. Construction has started in Zhenjiang New District, Jiangsu Province in the first half of this year, covering an area of 220,000 square meters.

　　We use a 50-degree phase change material to provide hot coal water, and provide a total of 110 modular Powerboxes, using a comprehensive heat and cold storage mode. This project can transfer more than 1.2 million kilowatt-hours of high-temperature electricity to users every year, reducing initial installation costs by 30%, and achieving peak-shaving and valley-filling, which indirectly reduces carbon dioxide emissions.

　　The second case is a semiconductor packaging company in Shanghai. In this project, we use the energy storage system to reduce the operating time of the enterprise during the peak electricity price period, transfer more than 4.6 million kilowatt-hours of peak electricity to customers every year, and save 3.87 million yuan in electricity costs.

　　In the third case, we used a large-capacity phase change heat storage, cold storage and smart energy heat storage system in Four Points Sheraton, and used a multi-energy complementary energy system to improve energy efficiency and create a green energy and low-carbon environmentally friendly ecology. hotel.

　　We have been working hard and exploring in the heat storage industry. We also welcome domestic and foreign experts and colleagues to communicate and cooperate with us. thanks!