Liu Zu'an, Hou Jiawen, Zhang Lili, Dewancker Bart Julien, Meng Xi, Hou Chaoping
Faculty of Environmental Engineering, The University of Kitakyushu, Fukuoka, 808-0135, Japan.
College of Architecture and Urban-Rural Planning, Sichuan Agricultural University, Dujiangyan, 611830, China.
Heliyon. 2022 Aug 4;8(8):e10056. doi: 10.1016/j.heliyon.2022.e10056. eCollection 2022 Aug.
To achieve carbon neutrality in 2060 (China), building energy-saving has been highly concerned. University buildings have great energy-saving potential as part of energy consumption where 70% of energy loss is caused by heat transfer from the envelope. However, most of the research on energy-saving factors for envelopes is limited to a certain climate or a specific building type, and the optimal configuration of envelopes under different climatic regions has not been well solved. Therefore, the influence degree and appropriate parameters of each factor of the teaching-office building envelopes on energy consumption under different climates were analyzed in this paper by orthogonal design and numerical simulation. Results show that: (1) Solar heat gain coefficient () and indoor air change rates () [the heat transfer coefficient of the exterior wall ( ) and ] are the main factors affecting the cooling [heating] load, the insulation form of the exterior wall ( ) and [ and solar radiation absorption coefficient of exterior surface materials ( )] have less influence; (2) The important ranking and optimal level of the influence of each factor on the cooling (or heating) loads are related to local load demands; (3) For the annual load, and the heat transfer coefficient of the exterior window ( ) is the focus of energy-saving in severe cold and cold zones, but their impact is not significant in Guangzhou and Kunming, and the high significance of is only shown in Hohhot, Lhasa, Guangzhou, and Haikou; (4) The annual load energy savings reach 39.64%-57.57% in different climates by optimizing all factors. The research results can provide directions and data references for the energy-saving design and renovation of educational building envelopes in different climates (China).
为实现2060年碳中和（中国），建筑节能受到高度关注。大学建筑作为能源消耗的一部分具有巨大的节能潜力，其中70%的能量损失是由围护结构的热传递造成的。然而，大多数关于围护结构节能因素的研究仅限于特定气候或特定建筑类型，不同气候区域下围护结构的最优配置尚未得到很好的解决。因此，本文通过正交设计和数值模拟分析了不同气候条件下教学楼办公楼围护结构各因素对能耗的影响程度及适宜参数。结果表明：（1）太阳得热系数（ ）和室内换气次数（ ）[外墙传热系数（ ）和 ]是影响制冷[制热]负荷的主要因素，外墙保温形式（ ）和 [ 和外表面材料太阳辐射吸收系数（ ）]影响较小；（2）各因素对制冷（或制热）负荷影响的重要性排序和最优水平与当地负荷需求有关；（3）对于全年负荷， 和外窗传热系数（ ）是严寒和寒冷地区节能的重点，但在广州和昆明其影响不显著， 的高显著性仅在呼和浩特、拉萨、广州和海口体现；（4）通过优化所有因素，不同气候下全年负荷节能可达39.64% - 57.57%。研究结果可为中国不同气候条件下教学楼围护结构的节能设计与改造提供方向和数据参考。
