The solar decathlon competition was initiated by the U.S. Department of Energy. The first competition was held in the United States in 2002 and held every two years thereafter. The competition is being held for the first time in Europe. During the competition, all solar houses are open to the public free of charge.

The 17 solar houses were designed and constructed by 17 universities from China, Spain, France, Germany, the United Kingdom, Finland and the United States. The participating solar houses are designed by university students, with the help and guidance of teachers. The participating solar energy houses have to pass 10 test passes. The test items include construction, engineering and construction, solar and hot water systems, power balance, comfort, practical functions, communication and social awareness, industrialization and market prospects, and innovation and sustainability. Sex.

When the reporter visited the competition, the bright and colorful five-star red flags were flying in front of the solar houses No. 8 and No. 16. They were the works of Tianjin University and Tongji University. The teachers and students of the two universities were excited to say: “This is our Chinese university. For the first time in a solar housing competition!"

According to the rules, contestants should build a real house with an area of ​​more than 70 square meters including living room, bedroom, kitchen, and bathroom on the competition site. The house should be equipped with TV sets, washing machines, dishwashers, water heaters, refrigerators, ovens, and electronic stoves. For a full set of household appliances used in everyday life, 3 to 6 students live in it as usual: cooking, laundry and bathing. The energy needed for housing is completely supplied by solar energy, and CO2 emissions are zero.

Tianjin University's solar-powered white wall tiles are clean and elegant, named "sunflower". Professor Gao Hui, the project instructor, said that the “Sunflower” solar house combines the architectural elements of the Chinese Huizhou architecture, the “One India” architecture of the Yunnan and the houses of the northern courtyard houses. From the spatial layout to the architectural forms, it reflects the “integration of nature and humanity” in China. "The concept of combining Chinese-style buildings with solar photovoltaic power generation technology. Into the interior, wooden hollow screens, carved armchairs and article desks, everywhere shows the ancient Chinese rhyme. In the kitchen, household appliances such as refrigerators, ovens, and washing machines are readily available, and the bathroom's bathing equipment is avant-garde and modern. Outdoor hot sun, indoor cool and pleasant. Gao Hui said that the interior is completely natural ventilation. He pointed to the atrium in the middle of the room and said that this is an element of Yunnan's "one seal." The ceiling is a glass window that can be remotely controlled. It is both lighted and ventilated.

The participating works of Tongji University are called "bamboo huts" because the entire exterior of the suite is made of bamboo, and the indoor floor and wall decorations and furniture are mostly made of bamboo. Professor Tan Hongwei, the project supervisor, told the reporter that the biggest feature of Bamboo House is the integration of traditional Chinese architectural elements and solar photovoltaic power generation systems. It utilizes inclined roofs to maximize the efficiency of solar photovoltaic power generation. Moreover, its main material, bamboo, is a natural material that grows fast and is environmentally friendly. The Bamboo House incorporates the original ecological architectural style of South China. The interior is pale yellow and elegant bamboo and the walls are decorated with Chinese calligraphy banners and Chinese paintings. The living room, bedroom, kitchen, bathroom and other spaces are well-designed. In the kitchen, a classmate is boiling water on an electric oven. He opened the refrigerator and told reporters: "Look, this refrigerator is filled with drinks, beer, dumplings, and ordering everything." According to him, during the competition, the contestants must invite others to Reunite in their own solar energy room and taste delicious food.

An oval solar house has attracted many people's eyes. This is the work of a student from the Institute of Architecture in Catalonia, Spain. It is called "Fabrab House". On its oval roof, a number of solar panels are installed. The designer of the hut said that due to the elliptical shape of the roof, more solar panels could be laid on top to maximize the collection of solar energy.

"Fabrab House" has windows on both sides and both sides, indoor air convection and natural ventilation. In the hot summer days, air conditioners can be used less or less to achieve energy savings. In addition, the "Fabrab House" is overhead. The lower part of the house forms a shaded space. During the hot season, people can rest and party under the shade.

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