Influence of Street Canyon's Microclimate on the Energy Demand for Space Cooling and Heating of Buildings

Vallati, Andrea; Grignaffini, Stefano; Romagna, Marco; Mauri, Luca; Colucci, Chiara

doi:10.1016/j.egypro.2016.11.119

Cited by 16 publications

(6 citation statements)

References 12 publications

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“…Okeil [28] introduced the residential solar block-a hypothetical building form-that outperforms linear and conventional block typologies by maximising winter but minimising summer solar radiation as a strategy for minimising heating and cooling demands, respectively. Space cooling demands for stand-alone buildings were compared to that of buildings within a street canyon configuration in Allegrini et al [29] and Vallati et al [30]. Both studies have shown that the latter requires less cooling demand than stand-alone buildings.…”

Section: Urban Geometry and Energy Consumptionmentioning

confidence: 99%

On the Optimisation of Urban form Design, Energy Consumption and Outdoor Thermal Comfort Using a Parametric Workflow in a Hot Arid Zone

et al. 2021

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The recent reports from the Intergovernmental Panel on Climate Change (IPCC) urge for the reconceptualization of our design of the urban built environments. However, current efforts to integrate urban environmental assessment into practice in Egypt are proving insufficient. This paper utilises the Ladybug tools simulation plugins to investigate the impact of changing the morphological characteristics of three-block typologies (scattered, linear and courtyard) and their associated parameters to understand their multidimensional relationship with environmental conditions, outdoor thermal comfort and energy use intensity. This study based in Cairo, Egypt, considers 3430 hypothetical geometrical configurations comprising of a variety of design parameters and indicators. The results show a strong correlation between the design parameters and the combined performance of thermal comfort and energy consumption (R2 = 0.84), with urban density having the strongest impact on both thermal comfort and energy use (R2 = 0.7 and 0.95, respectively). The design parameters exhibited a consistent impact on the different typologies, albeit with varying magnitude. Compact and medium-density urban forms are shown to elicit the best overall performance, especially for ordinal orientations (e.g., ~45°) across all typologies. Compact high-density scattered forms are favoured when considering thermal comfort, while courtyards outperform other typologies when considering energy efficiency and overall performance.

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Section: Urban Geometry and Energy Consumptionmentioning

confidence: 99%

On the Optimisation of Urban form Design, Energy Consumption and Outdoor Thermal Comfort Using a Parametric Workflow in a Hot Arid Zone

et al. 2021

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“…The already existing energy models and tools are able to simulate building consumption at an urban scale by assembling different sub-models [9]. However, these energy models only consider a few of the variables that actually influence the energy consumption of buildings at the urban scale [10], such as the presence of greenery [11], the albedo [12], the canyon effect [13], or the local climate conditions [14]. Indeed, designing these models at an urban scale is a complex task, since the available data usually lack some building-scale details; there is the need to make the right trade-off between model precision and the management of large amounts of data at different scales [15].…”

Section: Introductionmentioning

confidence: 99%

“…Figure13. Comparison between simulated and measured typical daily thermal consumptions, distinguishing ach = 0.5 h −1 (in orange), ach = 0.62 h −1 during the daytime, ach = 0.3 h −1 during the nighttime (in grey), and a variable ach with window openings (in blue).…”

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confidence: 99%

Energy Consumption Models at Urban Scale to Measure Energy Resilience

2020

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Energy resilience can be reached with a secure, sustainable, competitive, and affordable system. In order to achieve energy resilience in the urban environment, urban-scale energy models play a key role in supporting the promotion and identification of effective energy-efficient and low-carbon policies pertaining to buildings. In this work, a dynamic urban-scale energy model, based on an energy balance, has been designed to take into account the local climate conditions and morphological urban-scale parameters. The aim is to present an engineering methodology, applied to clusters of buildings, using the available urban databases. This methodology has been calibrated and optimized through an iterative procedure on 102 residential buildings in a district of the city of Turin (Italy). The results of this work show how a place-based dynamic energy balance methodology can also be sufficiently accurate at an urban scale with an average seasonal relative error of 14%. In particular, to achieve this accuracy, the model has been optimized by correcting the typological and geometrical characteristics of the buildings and the typologies of ventilation and heating system; in addition, the indoor temperatures of the buildings—that were initially estimated as constant—have been correlated to the climatic variables. The proposed model can be applied to other cities utilizing the existing databases or, being an engineering model, can be used to assess the impact of climate change or other scenarios.

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“…Further, the heat created by the inhabitants, equipment, and lights contribute to the overall building cooling load. External loads are caused by heat transfer through the envelope, whereas the internal loads are caused by various factors such as equipment heat and the heat generated by human activities among others [14,15]. The exterior-to-interior load ratio depends on the type of building, site environment and the design.…”

Section: Numerical Modelcooling Load Calculation Methodsmentioning

confidence: 99%

The impact of microclimate on energy performance of office buildings within urban contexts located in a composite climate, the city of Indore

Patel

Kaushik

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The energy consumption and thermal performance of a building depend not only on the internal factors, geometry and orientation but also on the external microclimatic factors such as vegetation, solar radiation, air temperature, wind speed and wind direction. Further, it is also influenced by the surrounding built environment characteristics such as street geometry, buildings and surface characteristics. The main objective of the current research paper is to record the energy performance of office buildings within urban contexts, located in a composite climate, for instance, the city of Indore and to determine the influence of the external parameters on energy consumption of the built space so as to optimize the built environment factors and achieve low energy consumption. The current study involves the identification of two office buildings in Indore with different built environmental characteristics. Field measurements were carried out on street canyons along the south and west façades of the buildings and the impact of external microclimatic parameters and the surrounding built environment characteristics on energy consumption of the building was quantified in this study. It was found that the street geometry, H/W ratio, street orientation, building material, urban density and vegetation has significant effects on microclimate and energy consumption of the buildings.

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Influence of Street Canyon's Microclimate on the Energy Demand for Space Cooling and Heating of Buildings

Cited by 16 publications

References 12 publications

On the Optimisation of Urban form Design, Energy Consumption and Outdoor Thermal Comfort Using a Parametric Workflow in a Hot Arid Zone

On the Optimisation of Urban form Design, Energy Consumption and Outdoor Thermal Comfort Using a Parametric Workflow in a Hot Arid Zone

Energy Consumption Models at Urban Scale to Measure Energy Resilience

The impact of microclimate on energy performance of office buildings within urban contexts located in a composite climate, the city of Indore

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