Xia Xiaodong, the project leader, told the reporter: "Do you think this building looks like an astronaut in a sealed spacesuit?" Wearing a spacesuit vividly depicts the greatest feature of this passive house. How can passive house achieve ultra-low energy consumption? It's like wearing a spacesuit outside "Wear it thicker and cover it tighter."
"Wear a little thicker" simply means to achieve good enough external wall insulation. The external wall insulation material of ordinary buildings is generally 10 cm thick, but this building adopts double-layer external insulation structure, and the thickness of insulation material is 30 cm, which is made of special materials and has excellent insulation performance. "Strict" means keeping the house airtight and building a special airtight layer to surround the whole peripheral structure.
Natural ventilation and natural light
Air conditioning "exists in name only"
It is said that the room is covered with dense "spacesuits". Will the people inside panic? The answer is, of course, "no!" The whole house allows fresh air to enter and exit freely through a unique and efficient fresh air waste heat recovery system. In winter, indoor air is kept warm, and outdoor air flows in after being heated and purified. In summer, the outdoor air will get cold before coming in. This reduces the demand for heating and cooling and achieves the goal of ultra-low energy consumption.
The staff pointed to the air conditioner installed on the overhead floor and told the reporter that the air conditioner was installed in the building, but it was hardly turned on on weekdays. Even in this hottest summer, the room can naturally maintain a suitable temperature without air conditioning, saving a lot of electricity.
Winter is the most magical.
Heating for 2 hours exceeds 20℃ all day.
The reporter visited the whole house, and every corner here fully demonstrated the systematic combination of passive low-energy building design concept and green building integration technology.
The staff told the reporter that the most amazing thing is that the design goal of ultra-low energy consumption green building in cold areas was realized in winter. Can you imagine? In the cold winter, in this room, it only needs to be heated for 2 hours every day, and the room temperature can be kept above 20℃ all day. The heat source only needs 40℃ hot water, and the room temperature can reach 28℃-29℃.
Save more than 80% electricity than ordinary buildings.
You can use the heat emitted by the human body.
Green energy-saving buildings should not only be comfortable to live in, but also fully demonstrate their economic advantages. Clean and renewable energy is used to provide cold and heat sources, and energy exchange equipment is used to recover heat.
The reporter noticed that solar photovoltaic panels and double-layer hollow curtain walls were hung on the outer wall of this small building. In winter and during the day, solar radiation can be used to heat the air in the curtain wall cavity, and the heat in the high-temperature air can be extracted to heat the water to heat the building. The low-temperature air after heat exchange is sent into the cavity of the building curtain wall through the air duct for recycling and heating. Here, even the heat emitted by the human body will not be wasted and can be fully utilized. The total energy consumption of HVAC and lighting in the whole year is about 83.4438+0% lower than that of ordinary buildings.
Reclaimed water recovery
Save more than 4000 yuan a year on water charges.
In addition, according to the local climate characteristics of Shenyang, the building adopts various designs such as rainwater recovery system, solar energy and wind energy power generation. Using reclaimed water system and water-saving irrigation, using rainwater and reclaimed water reuse technology, the utilization rate of non-traditional water sources can reach 62. 1%, and the water fee can be saved by more than 4,000 yuan every year.
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