1, clever use of dehumidification system

During the Winter Olympics, Wukesong Ice Sports Center will undertake the task of ice hockey training, and will be used to host top ice sports events such as ice hockey, flower skating and speed skating after the game.

Feng, the project manager of Wukesong Ice Sports Center of China Construction First Bureau Construction and Development Company, said that during the ice making process, the water content in the ice rink increased, which easily caused fog on the ice, which directly affected the quality of ice making.

The traditional roller dehumidification system used in skating rink has high power consumption, and the room temperature will rise by 2-3 degrees Celsius during use, which requires more power consumption to maintain ice quality.

In the process of project construction, the leading domestic solution dehumidification system is adopted, that is, the water in the air is fully absorbed by using the water absorption characteristics of the solution, and then the solution is heated, and the water in the solution is taken away by the fan and circulated in turn.

Compared with the traditional rotating wheel dehumidification system, the solution dehumidification can reduce energy consumption by 50%, the annual operating cost is about 70%, and the annual energy saving is nearly 900,000 kWh, and the annual energy saving is more than 2 million yuan.

Step 2 use natural light skillfully

The Ice Sports Center is located on the ground floor of ice cube South Square, which can provide a training ground for national curling athletes.

The electric lighting system of traditional ice sports venues consumes about 58,000 kWh per year, and the service life of the lighting system is only three years. The underground ice sports center requires higher lighting, and the energy consumption increases accordingly.

Wang Le, chief engineer of the ice sports center project of North China Company of China Construction First Bureau, said: "We installed a glass curtain wall with a diameter of 13m at the top of the ice hockey field, and laid a 19 light pipe on the ground to introduce natural light into the room.

Sunlight enters the ground in a large area through the glass curtain wall, which makes the sunlight entering the venue more abundant. The light guide tube is made of degradable materials, which is pollution-free and has a service life of 25 years. This ingenious use of natural light can save about 26,000 kWh per year, which is equivalent to the electricity consumption of a family for at least 10 years. "

3. 100% "green power"

"Green electricity", that is, green electricity, refers to converting renewable energy into electricity through wind power generation, hydropower generation and solar photovoltaic.

"All 26 venues in the three major competition areas of Beijing Winter Olympics have used' green power', which is the first time in Olympic history that all venues have achieved 100% supply of' green power'," said Li Sen, director of the overall planning department of Beijing Winter Olympics Organizing Committee, which is a' zero breakthrough' in Olympic history.

4. Black technology ice making

This Winter Olympics is the first time to adopt clean and low-carbon carbon carbon dioxide transcritical direct cooling ice-making technology. Carbon dioxide is a natural green refrigerant. Compared with the traditional ice-making technology, not only the energy efficiency is improved by 30%, but also the temperature difference of the ice surface is controlled within 0.5℃, and the ice surface is more uniform and flat, which can meet the requirements of different competitions on the ice surface.

According to reports, this technology is the most environmentally friendly ice-making technology in the world, and its carbon emissions tend to zero, which can minimize greenhouse gas emissions and save energy by 20% during operation. "It can save 2 million kWh a year, which is equivalent to the carbon reduction achieved by about 6.5438+200,000 trees.

If traditional refrigerants are used, the carbon emission under the same dosage is nearly 4000 times that of carbon dioxide refrigerants. Li Jiulin, deputy general manager and chief engineer of Beijing National Speed Skating Hall Company, introduced.

This "black technology" can not only make ice, but also realize total heat recovery. After the waste heat generated by refrigeration is recovered, 70℃ hot water can be generated for domestic water and dehumidification and regeneration, which greatly reduces the cost of heating, anti-freezing, dehumidification and ice pouring in venues.

5, low-carbon building materials

The stadium uses low-carbon building materials such as recycled cement and intelligent snow making, which saves water by 20% compared with the traditional technology. Ice hockey hall and speed skating hall built "green" roofs with photovoltaic panels, which reduced carbon emissions from the source. All the newly-built venues have obtained the Samsung green building design logo.