At present, the new energy base project mainly in the desert and Gobi is being promoted on a large scale. However, the power grid in the desert and Gobi area is weak and the support capacity of the power grid is limited. It is necessary to configure an energy storage system of sufficient scale to meet the transmission and consumption of new energy.

　　Recently, Azelio, a long-term energy storage company from Sweden, has launched an innovative R&D project in the Abu Dhabi desert. This article will introduce the company's long-term energy storage technology, hoping to help to inspire the development of the energy storage project of the Gobi New Energy Base in the desert.

　　On February 14, 2022, Masdar in the United Arab Emirates (Masdar), Khalifa University of Science and Technology and Azelio in Sweden launched a desert project that can continuously supply electricity "7 x 24 hours" in Masdar City, Abu Dhabi. "Photovoltaic + heat storage" demonstration project. The project uses a recycled aluminum alloy phase change material (PCM) heat storage technology developed by Azelio to store energy in the form of heat in metal alloys made of recycled aluminum and silicon, and utilize Stirling generators at night Convert it into electrical energy, so as to achieve "7 × 24 hours" continuous power supply. The system is scalable and competitive in the range of 0.1 to 100 MW, with a maximum energy storage duration of up to 13 hours and a designed operating life of more than 30 years.

　　By the end of this year, Khalifa University will report on the performance of the system in desert environments. The system's storage units will be demonstrated and evaluated against several criteria, including 24-hour supply of renewable electricity to an atmospheric water power generation system to capture humidity and condense it into usable water.

　　A. The development background of Azelio

　　Headquartered in Gothenburg, Sweden, Azelio currently employs more than 160 people, with production centers in Uddevalla, development centers in Gothenburg and Omar, and locations in Stockholm, Beijing, Madrid, Cape Town, Brisbane and Varza. Zart has offices.

　　Founded in 2008, the company's core expertise is the production and manufacture of Stirling engines that convert thermal energy into electricity, with an initial target area of gas-fired power generation using the GasBox. An improved version of the GasBox uses solar energy instead of burning gas. Throughout the development process, Azelio has been refined and accumulated experience with over 2 million runtimes. It was launched in 2018 and is dedicated to promoting TES.POD long-term energy storage technology.

　　B. Azelio's core technology introduction

　　Azelio's TES.POD unit consists of a storage unit using recycled aluminium phase change material (PCM) that, in combination with a Stirling engine, achieves a stable discharge of 13 hours when fully charged. What makes TES.POD units unique compared to other battery solutions is their modularity, long-term storage capacity, and decent system efficiency.

　　Recycled aluminum alloy phase change materials are used as heat storage devices to receive heat or electricity from renewable energy sources such as solar photovoltaics and wind energy. Store energy in the form of heat in recyclable aluminium alloys. It can be discharged for up to 13 hours at rated power, and can be stored for 5-6 hours when fully charged. Recycled aluminium alloy phase change materials (PCM) are not degraded and lost over time and are therefore very reliable.

　　During discharge, heat is transferred from the PCM to the Stirling engine through a heat transfer fluid (HTF), the working gas is heated and cooled, and the engine is propelled. Heat is transferred to the Stirling engine as needed, generating electricity at low cost and outputting heat at 55-65⁰ degrees Celsius with zero emissions throughout the day. The Azelio Stirling engine is rated at 13 kW per unit and has been in commercial operation since 2009. To date, 183 Azelio Stirling engines have been deployed around the world.

　　C. Introduction of product application

　　Azelio's current markets are mainly in the Middle East, South Africa, the United States and Australia.

　　In early 2021, Azelio will be commercialized for the first time at the Mohammed bin Rashid Al-Maktoum solar power plant in Dubai, UAE. So far, Azelio has signed a series of memorandum of understanding documents with partners in Jordan, India and Mexico, and reached a cooperation with the Moroccan Sustainable Energy Agency (MASEN) at the end of last year to launch the first grid-scale power plant in Morocco. Thermal Storage Verification System.

　　In August 2021, Egypt's Engazaat Development S.A.E.Azelio purchased 20 TES.POD units to provide energy supply for agricultural desalination. In November 2021, it won an order for 8 TES.POD units from Wee Bee Ltd., a South African agricultural company.

　　In March 2022, Azelio entered the US market by installing a US certification program for its TES.POD products to ensure that TES.POD products meet US standards. The certification project will be conducted in Baton Rouge, Los Angeles, in partnership with Baton Rouge-based electrical engineering and construction firm MMR Group. The storage units will be shipped to MMR from Azelio's facility in Sweden in April to accommodate U.S. standards, followed by a certification program installation in early fall.

　　D. some thoughts

　　Although SES Power focuses on the design and manufacture of customized lithium-ion batteries, we have been focusing on different types of energy storage technologies. We use 12V100Ah, 12V200Ah, 24V100Ah, 24V200Ah, 36V100Ah, 48V50Ah, 48V100Ah, etc. of square aluminum-shell lithium iron phosphate batteries, and 12V30Ah, 12V50Ah, 12V60Ah automotive starting batteries with high-performance rate lithium batteries (the maximum peak current can reach 1500A), Very popular with customers, but in some cases, lithium iron phosphate batteries, or even the entire series of lithium batteries, are not the optimal solution.

　　SES Power also talked about some inspirations and thoughts about this product.

　　The first is that the idea of using recycled aluminum alloy as heat storage medium is worth learning from. The electrolytic aluminum industry has a strong supply chain, abundant raw materials and sufficient production capacity, which will extend the aluminum industry chain and rapidly reduce costs.

　　The second is that the thermal-electric and thermal-thermal energy storage modes are worth promoting. There are many industrial parks in the world, and the energy consumption of industrial parks is also very large in addition to electricity. The use of high-quality aluminum alloy heat storage, part of the power supply in the form of heat-electricity, and part of the heat supply in the form of high-quality heat-multiple forms, can realize the efficient utilization of energy in the industrial park and the true multi-energy complementarity.