In modern society, people's pursuit of a comfortable building thermal environment is increasing, leading to a rise in energy consumption for building heating and air conditioning. In developed countries, building energy consumption accounts for 30%-40% of the country's total energy consumption, posing a certain constraint on economic development. Under the macroeconomic policy of "transforming the growth model and adjusting the economic structure," no substantial progress was made in adjusting the energy production and consumption structure in 2011, and the proportion of clean energy remained low. How to efficiently utilize clean energy has become a focus of work for the whole society. As energy conservation and emission reduction enter a critical stage, energy-efficient buildings have gradually been put on the agenda. The national and local governments have successively introduced policies to encourage the application of clean energy in the building sector.
As the cleanest renewable energy source on Earth, solar energy utilization technology has entered a period of rapid development. Applying solar energy to residences can reduce residential energy consumption by 8%–10%. In architectural aesthetics, "a house with sunlight is beautiful; a house that is not energy-efficient and environmentally friendly, even if magnificent, is ultimately unattractive." The integration of solar energy with architecture is both an architectural art and a crucial aspect of energy conservation. Building energy conservation urgently needs to be combined with solar energy.
my country's solar energy development is rapid, with abundant resources and a broad prospect for promotion and utilization. On the one hand, there are inexpensive and plentiful solar energy resources; on the other hand, there is the urgent need to address building energy consumption. The integration of solar energy with building-integrated photovoltaics (BIPV) will inevitably bring about new ways of energy utilization. Currently, the government has introduced incentive policies to support the development of BIPV technology, which opens up promising prospects for thin-film solar energy companies.
BIPV (Building Integrated Photovoltaics) is a form of photovoltaic technology that integrates photovoltaic power generation systems with buildings. It features the advantages of not requiring additional land resources, generating and using electricity on-site, and reducing transmission investment and losses. Furthermore, the peak power generation times of photovoltaic systems largely coincide with the peak electricity consumption times of buildings, significantly alleviating power shortages and ensuring power supply to buildings. This is of great significance for reducing dependence on traditional energy sources and promoting energy conservation and emission reduction in buildings.
As a new generation of solar cells, thin-film solar cells have unique advantages in BIPV. They not only have outstanding advantages such as abundant raw materials, low energy consumption, no pollution, and easy large-scale production, but also have many special advantages that are beneficial to photovoltaic building applications.
For solar roofs, one of the main applications of photovoltaic buildings, thin-film batteries can better leverage their technological advantages. First, thin-film batteries have a better low-light response effect and relatively lower unit cost. Second, thin-film photovoltaic modules are easier to integrate with building components, saving on building component and material costs while generating economic benefits through electricity generation and enhancing the building's aesthetics.
Dr. Xu Zheng, director of the Solar Energy Research Institute at the School of Science, Beijing Jiaotong University, stated that thin-film solar cells will have a promising future in the building sector. With the improvement of photovoltaic solar energy systems and innovations in building technology, the integration of photovoltaic solar energy and architecture will become even more seamless.
