Easing of Building Energy Consumption Increased Pressure
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Research background
At present in the western region of building energy consumption is low
Why will the low-energy buildings design key technology research is confined to the western "?
LiuJiaPing told the reporter, "west" has a variety of understanding: a from China's geographical position comes up understanding; The second from national "grand western development" of the west to understand, including not only the geographical position, also include the western underdeveloped region; the Midwest The third one is referring to our underdeveloped areas.
"I adopted the" western ", basically be the third kind, refers to the economy is relatively backward, national numerous, climate change is diversiform, especially the urbanization level relatively low area." LiuJiaPing calculate a bill, "in the western regions of China, many low-income people live in traditional vernacular dwellings, the present building energy consumption is low, but the potential growth is very big, once western poverty-stricken areas of building energy consumption per capita reached east level, will give our country building energy consumption of total amount control pressure." Therefore, in the traditional vernacular architecture gradually translate into modern architecture in the process, if can be developed for western different climatic conditions of regional low-energy buildings, will ease of building energy consumption increase pressure.
R&d characteristics
Western climate feature makes western ideas
"Western region climate characteristic distinct, basically can be summarized as" dry, dry 'type and "hot and humid wet' type two kinds." LiuJiaPing said, "in the dry, dry climate, divide again" "cold" and "cold" two kinds.
Tibet, xinjiang, yunnan, sichuan, shaanxi, gansu, belong to cold parts of type dry climate within area, qinghai, Tibet northwest and northern xinjiang, gansu, ningxia, shanbei western etc. To belong to cold type dry climate within area. Chengdu plains, native etc belong to damp and hot wet climate zones. In the hot dry climates, dry and common feature, solar radiation is rich in resources, climate is dry, high energy consumption CaiNuanQi long (heating), therefore, in these areas, make full use of solar energy heating, is an important way of building energy efficiency.
Therefore, LiuJiaPing with team then from western low-energy buildings basic ideas: raise architectural insulation performance; As far as possible using passive solar heating design; Conditional word, equipped with active solar energy heating equipment; Attention summer natural ventilation and sunshade design.
R&d conditions
Good building mode must get local civilians identity
Have thought and motivation, then create a regional low-energy buildings to want to have what basic conditions?
LiuJiaPing said: "the first step is to put the region traditional vernacular architecture in contain energy saving experience into scientific principle and method of designing, namely using the modern design of building energy-saving principle, interpretation of traditional architecture of the site and the layout, spatial organization, structure and areas of natural climatic conditions the quantitative relationship, then can be used for new low energy consumption of architectural creation."
In addition, we must research and development of this area energy-saving design outdoor calculated conditions, including LeiNian solar radiation parameters and climate parameters, etc; Must establish the region of indoor energy-saving design calculation conditions, including habitant in different seasons for indoor thermal environment demand characteristics, etc. Optimized and choose appropriate energy structure forms, often is subject to the level of economic development, technical conditions, durability and seismic safety requirements, etc. May finally creation have regional landscape features of building mode, including building the basic pattern, color, internal function space organization, layout, size, structure system, etc.
What is worth mentioning, experimental demonstration project construction. "A good architecture model, must obtain local civilians recognition, need to meet all requirements of people in architecture, can implement promotion. Only satisfy building energy-saving index, is easy, but often will not be accepted by the people." LiuJiaPing said, "the central government take money, according to experts own willingness to build a" da-zhai, 'how much value?"
R&d difficulties
Explore "progressive" design principle of hierarchy
"The most difficult, is the study create an architectural model and the design scheme, common people willing to pay their own way to build. LiuJiaPing after nearly 20 years of discovery: underdeveloped areas and rural area, the performance of the common people on the housing demand, basically abide by a kind of "hierarchy steps" the principle, namely must first auto-merging satisfy building security (seismic, flood control, etc.), function and use of convenience, construction cost suitability, indoor environment of comfort, architectural form the beautiful sex of demand. When has the performance-based index, just above may also realize energy conservation ecological index.
"In other words, when a building, various aspects performance is very good, be not, give people, the somebody else seismic. Therefore, don't focus only on energy conservation, ecological, is can't make a low-energy buildings." LiuJiaPing said.
S achievement interpretation
Such heat flux heat insulations design principle and method
Project team created such heat flux heat insulations design principle and method, this method is suitable for the western "solar enrichment area", civil construction.
Because, in the sun radiation resources abundant region, each building south, north and thing front of outdoor design calculation conditions differ greatly in winter, in the whole night and day north within 24 hours of, is a pure heat loss surface, but south during the day, and east-west part time, palisade structure will accept the sun radiate heat. If each toward insulating performance and same, north to the room can extremely cold (Tibet in most of such), a long winter almost can't use.
Lord, passive solar combination solve western heating
This study created natural ventilation flowmeter mathematical formula, optimizing got Lord and passive solar combination solve western heating technical plan. According to LiuJiaPing introduction, this is because in the west of cold type dry climate within area (such as Lhasa, etc), winter long (six months or longer, but the average temperature and that of January xian almost, With professional term to explain, namely Lhasa in winter heating load and xian are almost the same.
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By :
Jessie Stone
Submitted
2011-03-04 01:50:49 |
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