The National Museum of China is catching up the latest trend of going green. Though a great amount of energy is needed to run the complex, the largest of its kind in the world, designers have still made the museum environmental-friendly.

Outside, Beijing is still cold this spring, but walk into the museum, you'll soon take off your heavy coat. A radiant floor heating system is used to keep the museum warm with a more natural feel. Temperatures differ at varying heights, with the warmest being below 2 meters above the floor -- the space where visitors walk around. The temperature dips down in higher spaces to save energy.

An ice storage system has also been brought in, which could save some 1.3 million yuan per year. The working principle of system calls for freezers to make ice during off-peak hours and nighttime hours when the energy is produced more efficiently, economically and environmentally. Ice storage uses the stored "thermal" energy of the ice to cool the buildings during the daytime peak-usage periods.

The re-opened museum also has a green roof. The total size of the roof is 25-thousand-square-meters, which can collect rainfall for its water storage of 700 cubic meters. The museum also becomes smart as intelligent software is fixed to adapt its air conditioning on schedule.

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