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A modeling study for evaluating passive cooling scenarios in urban streets with trees. Case study: Athens, Greece

机译：用于评估树木繁茂的城市街道的被动降温方案的模型研究。案例研究：希腊雅典

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The present work investigates the causes of the variability in air temperature patterns among urban streets with trees in Athens, as obtained from in situ measurements, in a suburb area and in the city center. Urban variables studied are: the extent of tree canopy coverage, traffic load, surfaces albedo modification, street deepening aspect and the street's ventilation. The thermal effect of each variable is estimated by simulations using the Green CTTC analytical microclimate model. The model was first validated with measurements data and consequently used to study the effect of the various urban variables in attenuating the high values of air temperature within the studied streets considering two feasible scenarios for each of the examined streets. Model results revealed that the total attenuation effect in reducing the air temperatures inside the streets may reach as much as 5 K at noontime with a daily average cooling of 3 K. Further, the study demonstrates the potential use of microclimate modeling in assessing the merits of proposed passive cooling strategies in urban streets.
机译：本工作调查了从郊区和市中心的实地测量获得的雅典城市街道与树木之间的气温模式变化的原因。研究的城市变量包括：树冠覆盖范围，交通负荷，表面反照率修改，街道加深情况和街道通风。每个变量的热效应通过使用Green CTTC分析微气候模型的模拟进行估算。该模型首先使用测量数据进行了验证，然后用于研究各种城市变量对被研究街道内的高气温降低的影响，其中考虑了每个被检查街道的两个可行方案。模型结果表明，降低街道内部空气温度的总衰减效果可能在中午达到5 K，每天平均降温3K。此外，该研究还证明了微气候模型在评估气候变化优点方面的潜在用途。在城市街道上提出了被动冷却策略。

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