At the beginning of the new year, Cosin Solar Technology Co., Ltd. received a notification of award from Shanghai Nuclear Engineering Research & Design Institute Co., Ltd., confirming that the company has won the bid for the scientific and technological project of constructing a test platform and conducting key performance experimental research for the Haiyang Nuclear Power Wind-Solar-Thermal-Nuclear-Storage Integrated Energy System.

This project involves building a test platform capable of simulating multi-source input scenarios including nuclear energy, wind power, and solar power. It aims to study the dynamic matching characteristics between molten salt heat storage systems and different energy forms. Through experimental data accumulation, the project seeks to provide key technical support for subsequent large-scale engineering applications. The project encompasses a molten salt electric heating system, a molten salt heat storage system, along with supporting systems including a molten salt steam generation system, a steam heat exchange system, a feedwater deoxygenation system, an electrical system, a thermal control system, and auxiliary systems.

Cosin Solar is responsible for constructing a complete molten salt heat storage test system. The service scope covers the entire process, including system process design, equipment supply, installation guidance, commissioning guidance for individual units and subsystems, as well as design, supply, test procedure compilation, and test report preparation within the equipment integration scope. This successful bid represents a significant expansion of Cosin Solar's comprehensive molten salt energy storage solutions in multi-energy complementary application scenarios.

Molten salt energy storage is a low-cost, high-efficiency energy storage technology that absorbs energy when the salt is at a low temperature and releases heat when it is at a high temperature. By absorbing energy from off-peak electricity, curtailed wind and solar power, industrial waste heat, waste heat, and heat from natural gas/coal gas, it can output electricity, high-parameter steam, hot water, and civil heating. This technology offers advantages such as large energy storage capacity, high safety, grid-friendliness, low heat storage cost, and a small footprint. It can be widely applied in scenarios like flexibility retrofitting of thermal (heat) power plants, industrial waste heat recovery and utilization, and green heat supply/combined heat and power for industrial and commercial parks, making it a key technology for promoting the green and low-carbon transformation of traditional energy and industry.

From "First" to "Largest"
       Over a Decade of Engineering Practice Forging an Industry Benchmark

Cosin Solar's self-developed, highly reliable molten salt storage and heat exchange technology has been fully validated in numerous solar thermal projects, accumulating full-process engineering experience. In 2016, the company built China's first solar thermal power station with a large-scale energy storage system—the Qinghai Delingha 10MW Tower Molten Salt Tower CSP Project—achieving the first commercial application of molten salt energy storage technology. In 2018, the Qinghai Delingha 50MW Tower Molten Salt Tower CSP Project was successfully commissioned, becoming the world's first and only tower molten salt CSP project with power generation exceeding its design value. It has met power generation targets for four consecutive years, fully confirming the advancement and reliability of the company's integrated Molten Salt Tower CSP solutions. In July 2023, the Jinta ZhongGuang Solar “CSP + PV” Pilot Project 100MW CSP Project achieved full-load operation. This project was the first to apply Cosin Solar's innovative low-tank short-shaft pump technical solution, reducing comprehensive costs by approximately 12% compared to conventional solutions, achieving a dual breakthrough in technological upgrade and cost optimization. By the end of 2025, the company successfully completed the delivery of the high and low-temperature molten salt storage tanks for the Luneng Fukang Hybrid Project (new energy marketization and grid connection project) 100MW CSP Project.

Currently, the company is leading the accelerated construction of the Golmud 350MW Tower CSP Project, which features the world's largest single-unit capacity and largest energy storage capacity. This project will apply Cosin Solar's self-developed ultra-large capacity molten salt energy storage solution and innovatively introduce a distributed molten salt energy storage system design. Through continuous technological optimization and cost reduction, it will further consolidate the competitive advantage of molten salt energy storage in the long-duration energy storage field.

Starting from the 500-ton level molten salt storage capacity of the Delingha 10MW project, breaking through the 10,000-ton level in the first batch of CSP demonstration projects, reaching the 20,000-ton level in CSP projects within large-scale wind and solar bases, and now entering the 100,000-ton ultra-large capacity level with the Golmud project, each leap in scale marks a comprehensive upgrade of Cosin Solar's core capabilities in system design, equipment integration, and operation control. This also lays a solid foundation for extending molten salt energy storage technology to a wider range of application scenarios.

Building a Solid Technological Moat
       Demonstrating Industry Technology Leadership

To date, the company has obtained 117 patents related to molten salt energy storage technology, including 64 invention patents. It has participated in the formulation of 9 molten salt energy storage standards, including participation in 1 international standard and leading the formulation of 2 national standards. Based on solid technological accumulation, engineering practice, and innovative technical solutions, Cosin Solar can provide customers with full-process, highly reliable, and customized integrated energy services ranging from system design, equipment supply, installation management to commissioning, operation, and maintenance guidance.

The implementation of this project will further validate the unique value of molten salt energy storage in matching multiple energy forms such as nuclear power, wind power, and photovoltaics, laying a solid technical foundation for subsequent large-scale applications in the power sector and industrial decarbonization. Looking ahead, Cosin Solar will continue to adhere to an innovation-driven approach, exploring new pathways for molten salt energy storage to empower green transformation across more industries, and fully supporting the achievement of the national "dual carbon" goals.