Representatives suggest energy-saving regionalization

The Guangzhou Municipal Construction Commission invited some NPC deputies to visit and inspect the Guangzhou Green Building Demonstration Project with low energy consumption: Collecting rainwater from the roof to flush toilets, directing natural light into underground garages, and using solar power for indoor use. After seeing these fresh green energy-saving technologies, it was suggested by a major representative that in addition to continuing to promote energy efficiency in individual buildings, Guangzhou could also explore regional energy-saving models with better results.

Demonstration project special glass is both energy-saving and soundproof

The Guangdong Province Old Cadre Sports and Sports Activity Building is the first stop of the inspection activity. The building is about 100 meters high, with 27 floors above the ground and 3 floors underground. “The green glass building is an old cadre activity center!” The owner of a newspaper booth around told reporters that the exterior color of this building is very special, but it is not known why such a glass curtain wall is used. “The high-performance Low-E insulating glass used in this building's exterior window and glass curtain wall has excellent energy-saving performance and sound insulation performance.” The person in charge of the cultural and sports activities of Guangdong's veteran cadres explained that the glass is of a special color. Sunshade and heat protection, with good energy-saving performance and sound insulation performance. In addition, the exterior wall of the building also adopts a very mature self-insulation technology that meets the climate characteristics of the hot summer and warm winter regions.

This exterior-looking building has also designed a roof rainwater collection and utilization system. Unlike other buildings, there are a lot of inclined plates on the roof of the building. After rain, the rain can flow down the plates into the fiberglass tanks in the building equipment room. “Watering green plants and flushing toilets can use rainwater.” According to reports, the collected rainwater can be combined with the original water supply system for 11-15 layers of water supply. The capacity of the water storage tanks can meet 11-15 days a day. Water consumption.

Natural light import garage saves energy close to nature

After visiting the ground structure, everyone went into the underground garage. Although the garage of this building did not turn on, it was bright inside. It turns out that a new system was used here to introduce natural light into the garage, which not only saved energy but also brought people closer to nature. However, the cost of this device is not cheap, and the cost of each light pipe must be more than 10,000 yuan. Relevant person in charge of the provincial cadre's cultural and sports activities introduced that after using some green energy-saving measures, the building achieved a total energy saving rate of 60% for public buildings.

Afterwards, the inspectors came to Liuhua Exhibition Hall No. 15 again. On the roof of the building, a special set of solar panels attracted everyone's attention. According to the owner of the building, the entire PV system uses 45 pieces of 240Wp polysilicon solar modules. The power generated by this power station is converted into homogeneous power with the grid via a grid-connected inverter, and connected to the user-side power grid through a grid-connected power distribution box. "The building can directly use the electricity from the rooftop power station. This system can also seamlessly interface with the normal power system."

Representatives suggest that building energy efficiency in the region is better

According to Chen Yaxin, deputy director of the Municipal Construction Commission, there are many similar green and energy-saving buildings in Guangzhou. He disclosed that the green construction work in Guangzhou has entered the stage of scale development from the initial promotion of the demonstration stage. By April 2013, the total number of accumulatively identified items reached 25 (including 2 operating labels), with a total of 2,265,100 square meters, and 10 "Double 100" demonstration projects for green buildings totaled 1,654,400 square meters; There are 125 green building design review projects.

During the inspection, Zhang Nanning, the deputy chief architect of Guangzhou Municipal Design Institute and the deputy chief of the Municipal People's Congress, suggested that while continuing to promote green and energy-saving construction, Guangzhou should explore a regional energy-saving model with better energy-saving effect. “Although these buildings do have some energy-saving effects, the cost of energy-saving materials is very expensive, and the energy consumption during the production of these materials is also quite large, and the actual energy-saving effect is still uncertain.”

Zhang Nanning said that from the perspective of global development trends, the benefits of energy efficiency in a single building are not ideal. “Eg rooftop rainwater harvesting system, a building roof is a little bigger, and the collected rainwater is also limited. If we can combine buildings in a region and form a large-area rainwater collection system, the benefits will certainly be even greater. high."