Study of the Potential of Natural Light in Low and High Density Urban Environments in the Oasis City of Mendoza, in Summer

Córica, Lorena; Pattini, Andrea Elvira

doi:10.2150/jlve.33.101

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…In view of this climatic conditioning factor, with a high presence of sun throughout the year, Mendoza City has developed itself around a urban tree-lined layout under irrigation and is recognized as an oasis city model. This supply of urban vegetation shadow allows for the mitigation of dry weather harshness and, in particular, it controls solar radiation in summer (Corica and Pattini, 2009). In some cases, where access to a building is withdrawn back from the building line and is therefore devoid of the influence of arboreal shadows, or in winter where leaves fall off the trees, TS or circulation occurs without any control of direct solar radiation.…”

Section: The Case Selected Climatic Characteristics In Mendozamentioning

confidence: 99%

Developing a modelling factor index for transition spaces: a case study approach

Lasagno

Pattini

Rodríguez

et al. 2011

Architectural Science Review

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Transitional spaces (TS) are characterized by possession of high gradients of luminances between inside and out, which places a great demand on the users' visual system's function. A satisfactory descriptive indicator of this kind of situation could be a 'modelling factor' (MF), defined from cylindrical illuminance and horizontal illuminance measures. It would provide information on the depth and dimensionality of objects present in the scene, also taking into account a region's overabundance of daylight. A public building was selected as a case study, and solar light behaviour, including its interaction with the space, was monitored. Measurements were taken during an entire year at the start of each season (2008) under clear skies, at the beginning and at the end of each working day. Another measurement was taken in winter ( 2009) under overcast skies at 13:00, so as to obtain a comparative parameter. It was found that unfavourable conditions were produced in all seasons for about 2 hours, except at 09:15 in winter. All the data collected in the control situation were within the optimum modelling range, with values ranging between 0.3 and 0.4. The MF allows the integration of most relevant factors intervening in TS and emerges as a good descriptor for TS.

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Section: The Case Selected Climatic Characteristics In Mendozamentioning

confidence: 99%

Developing a modelling factor index for transition spaces: a case study approach

Lasagno

Pattini

Rodríguez

et al. 2011

Architectural Science Review

View full text Add to dashboard Cite

show abstract

“…Above this threshold, values would give rise to the incorporation of light transport and redirection technologies. 18,19 Studies were conducted in the city of Mendoza in the summer season, 20 and these determine the availability of vertical illuminance in lower level fac¸ade of buildings which should not reach the recommended 10,000 lx in 73% of cases. The mitigating factor is provided by the urban forest, inferring that trees would represent a ''solar control element'' in indoor spaces lit with side windows.…”

Section: Introductionmentioning

confidence: 99%

Urban trees as sunlight control elements of vertical openings in front façades in sunny climates. Case Study: Morus alba on north façade

Villalba

Pattini

Córica

2014

Indoor and Built Environment

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Benefits of urban trees are evident from the energy and environmental perspective, likewise they reduce glare and control light intensity. Given the hypothesis that trees reduce visible radiation significantly reaching lower level façades, this study is an approach to the analysis of urban forestation as a solar control element. The methodology employed involves measurement of: illuminance – transmittance variation, permeability variation and luminance contrast, by levels along the vertical development of the tree. Vertical illuminance values that exceed 25,000 lx were detected from 5.5 m onwards and values inferior to 3500 lx under that height. Based on the daily analysis of mulberry trees permeability variation in the visible spectrum, it is noted that incident radiation decreases by 90%, with 15% of variability. Natural light analysis must be differentiated by height since daylight scenarios vary accordingly.

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Suitability of different comfort indices for the prediction of thermal conditions in tree-covered outdoor spaces in arid cities

Ruiz

Correa

2014

Theor Appl Climatol

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Outdoor thermal comfort is one of the most influential factors in the habitability of a space. Thermal level is defined not only by climate variables but also by the adaptation of people to the environment. This study presents a comparison between inductive and deductive thermal comfort models, contrasted with subjective reports, in order to identify which of the models can be used to most correctly predict thermal comfort in tree-covered outdoor spaces of the Mendoza Metropolitan Area, an intensely forested and open city located in an arid zone. Interviews and microclimatic measurements were carried out in winter 2010 and in summer 2011. Six widely used indices were selected according to different levels of complexity: the Temperature-Humidity Index (THI), Vinje's Comfort Index (PE), Thermal Sensation Index (TS), the Predicted Mean Vote (PMV), the COMFA model's energy balance (S), and the Physiological Equivalent Temperature (PET). The results show that the predictive models evaluated show percentages of predictive ability lower than 25 %. Despite this low indicator, inductive methods are adequate for obtaining a diagnosis of the degree and frequency in which a space is comfortable or not whereas deductive methods are recommended to influence urban design strategies. In addition, it is necessary to develop local models to evaluate perceived thermal comfort more adequately. This type of tool is very useful in the design and evaluation of the thermal conditions in outdoor spaces, based not only to climatic criteria but also subjective sensations.

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Study of the Potential of Natural Light in Low and High Density Urban Environments in the Oasis City of Mendoza, in Summer

Cited by 5 publications

References 3 publications

Developing a modelling factor index for transition spaces: a case study approach

Developing a modelling factor index for transition spaces: a case study approach

Urban trees as sunlight control elements of vertical openings in front façades in sunny climates. Case Study: Morus alba on north façade

Suitability of different comfort indices for the prediction of thermal conditions in tree-covered outdoor spaces in arid cities

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