Analysis of Height-to-Width Ratio of Commercial Streets with Arcades Based on Sunshine Hours and Street Orientation

Abstract

By extracting and simplifying the characteristics of commercial streets with arcades (Qilou) in Nanning, the tissue map of Qilou streets which reflects the urban morphology, including the road network form, block scale, building scale and other characteristics in a hot and humid area is obtained. In addition, the sunshine simulation is performed by using sunshine design software in an environment comprising streets with arcades to simulate street sunlight environments under various conditions. The relationship among street height-to-width ratio, sunshine hours, and street orientation angle is achieved by nonlinear fitting analysis. Then, a model is established to adjust the street height-to-width ratio based on sunshine requirement and street orientation. The finding indicated that when the street is north–south, it is suggested that the street height-to-width ratio is 0.95–1.13 to reduce sunshine hours effectively, and when the street is east–west, it is proposed that one side of the street should have a recessed space to improve the thermal conditions. The results of this study can serve as the specific guidelines that can be adopted in the redesign and reformation of commercial streets with arcades to achieve thermal comfort of Qilou streets in hot and humid areas.

The Future of Climate-Resilient and Climate-Neutral City in the Temperate Climate Zone

“…The best general solution seems to be the use of irregular road runs, in which the orientation changes from time to time, creating a balanced thermal environment. In addition, it is worth using diagonal streets [ 264 , 324 ]. In warmer temperate climates, the orientation of the roads along the N–S axis is suggested as the most appropriate [ 253 , 281 ].…”

“…In warmer temperate climates, the orientation of the roads along the N–S axis is suggested as the most appropriate [ 253 , 281 ]. In this situation, it is worth ensuring a considerable height of the canyon [ 222 , 324 ]. One can also reasonably increase the streets’ width to provide better comfort of their use [ 322 ].…”

“…Streets oriented on the E–W axis are suggested as optimal for colder regions [ 285 ]. They may also be optimal in warmer climate zones, but only if the canyon is deep [ 283 , 324 ]. In that case, the canyon’s length should be shortened [ 250 ], and the spaces between buildings along the street should be increased.…”

Determinación de variables edilicias presentes en morfologías del Área Metropolitana de Mendoza para la eficiencia energética

“…La morfología urbano-edilicia ha sido ampliamente analizada por sus efectos sobre el comportamiento energético edilicio, disponibilidad solar en fachadas norte y techos, ganancias solares, microclima urbano, confort térmico exterior, dirección y velocidad del viento, contaminantes y calidad del aire (Aboelata, 2020;Bakarman, & Chang, 2015;Bourbia, & Awbi, 2004;Huang et al, 2021;Martinelli, & Matzarakis, 2017;Mesa et al, 2011;Ruggeri et al, 2020;Schulte et al, 2015;Shareef, & Abu-Hijleh, 2020;Vartholomaios, 2017). La temática es de impacto para planificadores y diseñadores preocupados no solo por la calefacción de espacios activa y pasiva, calentamiento de agua para uso doméstico y generación fotovoltaica, sino también por la rehabilitación profunda del parque edilicio Colucci et al, 2017;Huang, & Li, 2017;Li et al 2020b;Savvides, & Vassiliades, 2017;Sharifi, 2019;Shi et al, 2021;Wolff, 2014;Zhang et al 2019).…”

Research on Indoor Thermal Comfort and Age of Air in Qilou Street Shop under Mechanical Ventilation Scheme: A Case Study of Nanning Traditional Block in Southern China

“…At the end of the 19th century, many qilou shopping streets were built in Guangzhou, Wuzhou, Haikou, Nanning, and other Lingnan regions, all of which boasted flourishing trade and rapid economic development. Some negative effects are that micro-climates in qilou streets have higher air temperature and lower air velocity than their surroundings [5], which is referred to as the heat island effect [6]. The qilou streets and their pavements trap a lot of solar energy daily and emit it at night.…”