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Cool: Hamburg's house unveiled

"HAMBURG House," one of the city projects brought by Germany to the Expo, was unveiled at the Urban Best Practices Area yesterday.

Hamburg, a famous port as well as a sister city of Shanghai, is highlighting its "passive house" - using as little energy as possible while still keeping the pavilion operating at its full potential.

Ole von Beust, the city's mayor, said at the unveiling ceremony that the Hamburg house was "a good example of high-efficiency, energy-saving and livableness."

The pavilion, which doesn't have an air conditioning system, nevertheless keeps visitors feeling cool during the summer.

The secret: a ground source heat pump. It lets heat flow in a natural way throughout the house via pipes, keeping the house cool in summer and warm in winter.

The design takes advantage of the moderate temperatures in the ground to boost efficiency and reduce the operational costs of heating and cooling systems. The temperature will be kept at 25 degrees Celsius throughout the year.

The pavilion's windows are triple glazed to keep the heat out during the summer and in during the winter.

On top of the pavilion there is solar power generating equipment which is the main source of the electricity used.

The cost of the four-floor structure is about 42 million yuan (US$ 6.15million).

Two music groups from Hamburg held concerts in Pudong and Puxi yesterday to celebrate "Hamburg Day."


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