The "great light and heat" era is on the horizon. China's solar thermal industry is in need of a clear transformation path, such as the concept of "Daguangre." At the 7th China New Energy International Summit Forum, Li Jun, Chairman of Four Seasons Muco New Oriental, emphasized that "big light and heat" aims to break through the traditional boundaries of the solar thermal sector, driving technological upgrades from low-temperature to medium- and high-temperature applications, and expanding beyond hot water to thermal energy and even power generation. Moreover, an open and integrated industrial approach is essential, merging solar, air, and other energy sectors to enable horizontal growth.
Solar thermal energy represents a key form of solar utilization, including solar water heaters, solar thermal power generation, and solar desalination. Currently, technologies like Concentrated Solar Power (CSP) and solar water heaters are more mature and widely adopted.
CSP holds great potential. Unlike the often-overhyped solar photovoltaics, solar thermal development has progressed steadily, albeit with less public attention. Over nearly a decade, China's annual output in the light and heat sector has reached 100 billion yuan, with over 42 million square meters of solar collectors produced annually—accounting for more than 70% of the global total.
Another key difference from the photovoltaic industry is that 95% of solar thermal output is consumed domestically. As energy conservation becomes increasingly important, government policies are also supporting the industry. In the first half of this year, the Ministry of Industry and Information Technology issued the "Guiding Opinions on Promoting the Healthy Development of the Solar Water Heater Industry," aiming to optimize and upgrade the sector while leveraging the scale effects of industrial clusters. By 2015, it aimed to cultivate three leading companies with annual sales exceeding 2.5 million units.
However, according to Li Jun, there is still significant room for growth in the medium-to-high temperature thermal energy and high-temperature thermal power sectors, which are valued in the trillions. For instance, a recent report highlighted that global CSP capacity is currently at 7.5 GW, with another 8.5 GW under development. Though this may seem modest compared to PV or wind, it signals that the global solar thermal power industry is entering its third wave of growth.
For enterprises, Li Jun believes that while "Daguangre" is the direction, the opening of the industrial chain will require companies to build a new ecosystem through integration and rethink their strategies in a changing environment. At the corporate level, the focus should be on solar thermal energy, combining technological innovation with multi-energy solutions to transition from single-source energy to a composite model, expanding from hot water to medium- and high-temperature thermal and power applications.
Li Jun also stressed the importance of multi-energy composite and energy storage technologies as critical steps in industrial integration. Additionally, he encouraged companies to explore new business models, such as the "City Hot Water Bank." This concept can be seen as a product, a solution, or a platform, offering community-based energy services in the future. Like the internet, it could connect energy providers, architects, construction teams, financing platforms, and energy users. It could also help promote the solar industry through strategic initiatives.
From a market perspective, solar thermal energy has traditionally focused on rural areas and third-tier cities. However, with the growing urgency of urban energy efficiency and the acceleration of urbanization, the path for light and heat companies to penetrate urban markets is becoming clearer and more promising.
Traditional Steam Sauna
The dry steam sauna, also known as the dry sauna or dry steam room, is a type of sauna that uses dry heat to create a relaxing and detoxifying experience.
The dry steam sauna is typically made of wood, with a small heater that heats up rocks or stones. These heated stones then radiate the heat into the sauna, creating a warm and dry environment.
The dry steam sauna is designed to promote sweating and detoxification. As the body heats up, the sweat glands are activated, helping to eliminate toxins and impurities from the body. This can have numerous health benefits, including improved circulation, increased metabolism, and enhanced immune system function.
In addition to its detoxifying properties, the dry steam sauna also offers relaxation and stress relief. The warm and dry environment can help to relax muscles, relieve tension, and promote a sense of calm and well-being. Many people find the dry steam sauna to be a great way to unwind and de-stress after a long day.
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