建筑朝向对冷负荷影响的比较研究

Q1 Chemical Engineering

International Journal of Thermofluids Pub Date : 2025-05-01 DOI:10.1016/j.ijft.2025.101244

Ahmad Abdalla, MD Islam, Isam Janajreh

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引用次数: 0

摘要

减少建筑物的冷负荷是一项关键的可持续性措施。影响建筑冷负荷的因素主要有空调系统室外温度、湿度、建筑形态等。本文采用瞬态系统仿真的方法比较了三个不同中东和北非地区建筑朝向对冷负荷的影响。结果表明，西向建筑的冷负荷需求最高，为1950.85吨。阿联酋，1566.14吨。约旦1653.69吨。与西北方向相反，需要最少的（1405.57吨）。阿联酋每小时376.04吨。521.04吨。hr在突尼斯)。阿联酋、约旦和突尼斯的西向建筑最大冷负荷与西北向建筑最小冷负荷的百分比差距分别为1.54%、2.33%和2.03%。它强调，与阿联酋和突尼斯相比，约旦更容易受到取向的影响。该研究还比较了每个地区较大家庭的年度电费和二氧化碳排放量。人均国内生产总值（GDP）比较通过不同的方向导致潜在储蓄，突尼斯的人均储蓄与GDP之比最高，为0.013375，约旦为0.012655，阿联酋为0.002666。在阿联酋、约旦和突尼斯，由于朝向导致的二氧化碳排放量分别减少了0.00654、0.00264和0.00320吨/平方米。本研究采用生命周期评估法（LCA）探讨建筑朝向对CO2排放的影响。它揭示了高达2.47%（约旦），1.91%（突尼斯）和1.56%（阿联酋）与发电区域能源结构相关的变化。因此，适当的建筑朝向将提供经济效益和二氧化碳排放效益。可持续发展指数也被引入，通过整合冷却负荷效率（CLE），经济节约（ES）和二氧化碳减排（CER）来考虑建筑方向。最后，方差分析（ANNOVA）敏感性分析探讨了环境参数对冷负荷的影响，结果显示，朝向对阿联酋、约旦和突尼斯的方差贡献显著，分别为16.6%、10.8%和15.85%。研究结果可以为节能建筑和未来可持续城市的设计提供有价值的指导。

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Influence of building orientation on cooling load: A comparative study

Reducing the cooling load for buildings is a key sustainability measure. Factors effecting buildings’ cooling load are air conditioning (A/C) system outdoor temperature, humidity, and building configuration etc. Here, transient system simulation is used to compare the impact of building orientation on cooling load in three different MENA regions. The findings revealed that west-oriented buildings demand the highest cooling load (1950.85 Ton.hr in UAE, 1566.14 Ton.hr in Jordan, and 1653.69 Ton.hr in Tunisia) contrary to north-west orientation that require the least (1405.57 Ton.hr in UAE, 376.04 Ton.hr in Jordan, and 521.04 Ton.hr in Tunisia). The percentage disparity between the maximum cooling load of west-oriented buildings and the minimum load of the north-west oriented was 1.54%, 2.33%, 2.03% for UAE, Jordan, and Tunisia, respectively. It emphasizes Jordan greater susceptibility to orientation compared to UAE and Tunisia. The research also compared annual electricity bills and CO₂ emission extrapolated for larger households to each region. The Gross domestic product (GDP) per capita comparison lead to potential savings through different orientations, with Tunisia demonstrating the highest savings-to-GDP per capita ratio at 0.013375, Jordan at 0.012655 and UAE at 0.002666. The CO₂ emission due to orientation resulted in a reduction of 0.00654, 0.00264 and 0.00320 tons per m² in the UAE, Jordan, and Tunisia, respectively. This study employs Life Cycle Assessment (LCA) to investigate the influence of building orientation on CO₂ emissions. It uncovers variations of up to 2.47% (Jordan), 1.91% (Tunisia), and 1.56% (UAE) linked to regional energy mix for electricity generation. Therefore, proper building orientation would offer both economical and CO₂ emission benefits. Sustainable Index is also introduced to account for building orientation by integrating Cooling Load Efficiency (CLE), Economic Savings (ES), and CO₂ Emission Reductions (CER). Finally, Analysis of Variance (ANNOVA) sensitivity analysis explores the effects of ambient parameters on cooling loads, revealing that orientation significantly contributes 16.6% to the variance in the UAE, 10.8% in Jordan, and 15.85% in Tunisia. The findings can serve as valuable guidelines for design of energy-efficient buildings and future sustainable cities.

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