Effect of surface treatment and built form on thermal profile of open spaces: A case of Mumbai, India

Mehrotra, Surabhi; Subramanian, Divya; Bardhan, Ronita; Jana, Arnab

doi:10.1016/j.uclim.2020.100736

Cited by 13 publications

(5 citation statements)

References 37 publications

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“…Taleghani et al [45] also found that larger calculation domains would cause smaller simulation errors in the boundary sensitivity check process. The mean error between simulations and measurement data was tested using the statistical method Coefficient of Variance in Root mean Square Error (CVRMSE) and was found to be under acceptable limits, i.e., below 10% [37]. Therefore, to sum up, the rest of the simulations in this research have the same reliability with regard to using ENVI-met as the research tool.…”

Section: Calibration Of Envi-metmentioning

confidence: 85%

“…Then, two representative configurations of high-rise residential buildings in Chongqing with different design variables are selected and modified as test models. ENVI-met simulations are utilized to reproduce the thermal environment in the overhead area as this software has been widely used for microclimate measurement, urban open space (such as blocks, courtyards, and green infrastructure) analysis, heat island, and thermal comfort in previous studies [36][37][38][39]. Its accuracy is first calibrated by comparing the on-site measurement data.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Bottom-Overhead Design Variables on Pedestrian-Level Thermal Comfort during Summertime in Different High-Rise Residential Buildings: A Case Study in Chongqing, China

et al. 2022

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The design of bottom-overhead (or lift-up) buildings is advantageous in improving the thermal environment of high-density cities and enhancing the comfort level of occupants’ activity space on the ground floor. This study aims to investigate the impact of multiple architectural design variables on the ground floor overhead area of slab-like and tower high-rise residential buildings from the perspective of pedestrian-level thermal comfort with ENVI-met simulations and Standard Effective Temperature (SET*) evaluation. The design variables of the 25 tested models include the number of continuously arranged buildings, aspect ratio, overhead form, overhead space height, positions of overhead space enclosures, and openness degree, derived from existing overhead buildings in Chongqing. The results demonstrate that when the number of continuously arranged buildings and the aspect ratio increase, the overhead area has a more comfortable environmental state, while the overhead height is negatively correlated. In addition, when the enclosures are on opposite sides and their openness degree is 0.75–0.5, the area tends to be more comfortable. For slab-like buildings, the thermal comfort of the partial-overhead form is the worst while the semi-overhead form is relatively better. However, the overhead form has no significant impact on the thermal comfort of tower buildings. These findings can provide some suggestions and inspiration for the design of overhead buildings to create a more sustainable and livable microenvironment.

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Section: Calibration Of Envi-metmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Effects of Bottom-Overhead Design Variables on Pedestrian-Level Thermal Comfort during Summertime in Different High-Rise Residential Buildings: A Case Study in Chongqing, China

et al. 2022

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“…Urban areas are characterized by increased material surfaces. These surfaces absorb more radiation and are responsible for increased ambient Tair, depending on their material and colour (Mehrotra et al., 2021). Therefore, optimization of material selection can substantially improve thermal comfort (Kakoniti, Georgiou, Marakkos, Kumar, &Neophytou, 2016).…”

Section: Introductionmentioning

confidence: 99%

Microclimate analysis of high-density urban residential open enclosures: A case of Thane, India

Srivastava

Sharma

Jadon³

2023

ECJ

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Urban heat island produces a significant impact by modifying the microclimate in urban areas. To ensure good quality of life with a safe and healthy built environment, the floor space index (FSI) can be an effective tool. It helps to control the urban densities and shape the morphology of the built environment. Taking the case of typical residential development in a densely populated Indian city, an attempt has been made to explore the relationship between FSI and the microclimate of such open spaces that perform like an open enclosure (OE). Adopting the simulation pathway in ENVI-met, a mathematical relationship is established between an important tool used by urban planners and the variables of the microclimate in a typical urban enclosure. The observations indicate that FSI has a strong negative correlation with air temperature and mean radiant temperature. Evaluation of physiological equivalent temperature reveals a similar relationship with FSI, demonstrating a temporal transposition of the trend for a particular FSI range of 2.5-3.5 in the late evening and early morning hours due to high humidity levels and reduced wind speeds. The study will help the planners to prognosticate the microclimatic variables while working out the data-based, logical and well-evaluated future development control regulations.

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“…Furthermore, Nikolopoulou and Lykoudis [20] analysed outdoor thermal comfort in five countries in Europe and related microclimate conditions to the use of outdoor spaces, where air temperature and solar radiation were the most dominant parameters. Other investigations have focused on thermal variability in urban environments by analysing the relationship between urban morphology, microclimate, ground surface treatment, vegetation cover contribution and thermal comfort [21][22][23]. Indeed, the use of outdoor public spaces has become a qualitative indicator that should not be neglected for the determination of the most favourable environment and the establishment of seasonal usage profiles [24].…”

Section: Introductionmentioning

confidence: 99%

Predictive Capacity Analysis for Outdoor Thermal Comfort Assessments: A Case Study of Jijel City, Algeria

BOUTELLIS

Bouchair

2022

ARFMTS

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Ensuring acceptable thermal comfort conditions in public spaces is nowadays a major concern of urban design. A number of indices have been proposed in the literature, namely PMV, PET, SET*, UTCI, PT, mPET and MOCI. The present study aims to find the most suitable index the outdoor thermal comfort assessment in the city of Jijel by comparing the predictive capacities of these indices in terms of frequency occurrence and by relating them with the contextual responses of users. These indices are defined, their feature is analysed and finally explored. Thermal comfort based on these indices was evaluated using RayMan and Townscope softwares. The choice among these indices needs their comparison with data gathered from a survey by questionnaire. The findings indicate a slight agreement between these indices and the perceived sensation (PESV) values in the range of -1 and +1, especially with the indices SET* and mPET. However, for the classes +2 and +4, a significant disagreement is observed. For the class +3, however, only PET, PMV and SET* are more joined to the perceived sensation values. The disagreements may be related to the physical environment characteristics, the subjective perception, and the adaptation attitude of the users. Thus, further indices calibration investigation is needed for better prediction of comfort taking into account local specificities. Based on the indices which are relatively in agreement with PESV, a neutral air temperature of 19.8 °C in winter and 20.4 °C in summer for the city of Jijel is deduced. Also, a comfort zone of 17.3 to 22.4 °C in winter and 18 to 22.8 °C in summer is extrapolated.

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Effect of surface treatment and built form on thermal profile of open spaces: A case of Mumbai, India

Cited by 13 publications

References 37 publications

Effects of Bottom-Overhead Design Variables on Pedestrian-Level Thermal Comfort during Summertime in Different High-Rise Residential Buildings: A Case Study in Chongqing, China

Effects of Bottom-Overhead Design Variables on Pedestrian-Level Thermal Comfort during Summertime in Different High-Rise Residential Buildings: A Case Study in Chongqing, China

Microclimate analysis of high-density urban residential open enclosures: A case of Thane, India

Predictive Capacity Analysis for Outdoor Thermal Comfort Assessments: A Case Study of Jijel City, Algeria

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