This page has only limited features, please log in for full access.

Dr. Doris Chi
Universidad de las Americas Puebla (UDLAP)

Basic Info


Research Keywords & Expertise

0 Daylighting
0 Thermal Comfort
0 solar radiation
0 climate-based daylight modelling
0 Weather and Climate

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 09 July 2021 in Sustainability
Reads 0
Downloads 0

This work implements parametric tools to optimize the environmental design of urban adaptive shadings through multiobjective evolutionary algorithms that look for solutions of dynamic (time-changing) structures used in open public spaces. The proposal is located in Malecon Cancun Tajamar in the southeast part of Mexico, and the main objective is to enhance the thermal comfort of users as well as to become part of the social dynamics of the place reinforcing identity through appropriation. The proposed workflow includes four steps: (1) geometric modelling by parametric modelling tools; (2) simulation of environmental parameters by using BPS tools; (3) shape optimization by using an evolutionary algorithm; and (4) environmental verification of the results. The Universal Thermal Climate Index (UTCI) was used to assess the outdoor thermal comfort derived from the dynamic shadings. The results showed a significant improvement in the thermal comfort with absolute UTCI differences of 3.9, 7.4, and 3.1 °C at 8, 12, and 16 h, respectively, during the summer; and absolute differences of 1.4, 3.5, and 2 °C at 8, 12, and 16 h, respectively, during the winter. The proposed workflow can help to guide the early design process of dynamic shadings by finding optimal solutions that enhance outdoor thermal comfort.

ACS Style

Doris Chi; Edwin González M.; Renato Valdivia; Eduardo Gutiérrez J.. Parametric Design and Comfort Optimization of Dynamic Shading Structures. Sustainability 2021, 13, 7670 .

AMA Style

Doris Chi, Edwin González M., Renato Valdivia, Eduardo Gutiérrez J.. Parametric Design and Comfort Optimization of Dynamic Shading Structures. Sustainability. 2021; 13 (14):7670.

Chicago/Turabian Style

Doris Chi; Edwin González M.; Renato Valdivia; Eduardo Gutiérrez J.. 2021. "Parametric Design and Comfort Optimization of Dynamic Shading Structures." Sustainability 13, no. 14: 7670.

Journal article
Published: 05 January 2021 in Journal of Daylighting
Reads 0
Downloads 0

This study comes from an integrated approach combining daylighting and thermal aspects of building spaces. Several room configurations derived from the combination of four main design variables are tested. Width-to-Depth-Ratio (WDR), Window-to-Wall-Ratio (WWR), orientation, and climate conditions are simultaneously investigated to find the best solutions that enhance the Daylight Availability and, at the same time, diminish solar gains and total energy use (lighting plus cooling and heating). Principal Component Analysis (PCA) is the statistical technique used to outline design guidelines for Mexican climate regions, namely arid, tropical, and temperate. Hence, optimal values for WDR and WWR were recommended for specific orientations and climates. Therefore, PCA is set as the basis of a methodology to define design strategies for specific locations and climates that further lead to updating high-performance standards in buildings at regional levels. Results also showed that climate conditions, such as seasonal cloud cover, temperature, and solar radiation, are crucial when establishing target limits for the actual daylit and over lit areas. The temperate climate was able to endure up to 60% as over lit area. Instead, the arid and tropical climates tolerated up to 50% and 40%, respectively, as over lit areas.

ACS Style

Doris A. Chi. An Approach to Determine Specific Targets of Daylighting Metrics and Solar Gains for Different Climatic Regions. Journal of Daylighting 2021, 8, 1 -19.

AMA Style

Doris A. Chi. An Approach to Determine Specific Targets of Daylighting Metrics and Solar Gains for Different Climatic Regions. Journal of Daylighting. 2021; 8 (1):1-19.

Chicago/Turabian Style

Doris A. Chi. 2021. "An Approach to Determine Specific Targets of Daylighting Metrics and Solar Gains for Different Climatic Regions." Journal of Daylighting 8, no. 1: 1-19.

Journal article
Published: 01 December 2019 in Journal of Daylighting
Reads 0
Downloads 0

New design tools have enabled architects to explore complex geometries for building envelopes. Perforated Screens (PS) have gained popularity but their design is still intuitive, often focused on aesthetic and morphological criteria. Yet, there is a lack of guidelines or quantitative standards for designing optimal PS, in terms of their daylight provision, views outside, solar shading or energy performance. Since PS can greatly influence the interior conditions, it is essential to understand the effect of screen parameters, such as thickness, perforation percentage, separation distance, and others that are often manipulated by designers. This paper analyses the daylighting and shading performance of thick PS in office buildings. Five design parameters were simultaneously tested in terms of the annual daylight and solar irradiance contribution. Simulations were performed with DIVA-for-Grasshopper and the following metrics were accounted: useful daylight illuminance, actual daylight availability, and shading coefficients. Three orthogonal arrays allowed the selection of 64 PS configurations as representatives. The overall average of every metric was used as an approach to select all factors having a mean significantly different. The mean values were then established as ‘Preferable’ targets. Finally, design guidelines to plan thick PS used in front of South, East, and West glazed façades, in a Mediterranean climate, were proposed. The results highlighted the importance of selecting appropriate values for every design parameter to enhance the integrated performance of thick PS. Header of solarlits.com

ACS Style

Doris Abigail Chi Pool. A Comprehensive Evaluation of Perforated Façades for Daylighting and Solar Shading Performance: Effects of Matrix, Thickness and Separation Distance. Journal of Daylighting 2019, 6, 97 -111.

AMA Style

Doris Abigail Chi Pool. A Comprehensive Evaluation of Perforated Façades for Daylighting and Solar Shading Performance: Effects of Matrix, Thickness and Separation Distance. Journal of Daylighting. 2019; 6 (2):97-111.

Chicago/Turabian Style

Doris Abigail Chi Pool. 2019. "A Comprehensive Evaluation of Perforated Façades for Daylighting and Solar Shading Performance: Effects of Matrix, Thickness and Separation Distance." Journal of Daylighting 6, no. 2: 97-111.

Articles
Published: 28 November 2018 in Advances in Building Energy Research
Reads 0
Downloads 0

In this paper, daylighting and thermal analysis are carried out in synergy to ensure the best overall performance of perforated solar screens (PSS) used on fully glazed offices facing towards South, East, West and North, placed in Seville. The study has been conceived by applying multiple orthogonal arrays to account oriented transverse comparisons of several PSS design variables, with respect to their impact on the Daylight Availability (DAv) and the annual energy demand (lighting plus cooling and heating). Daylighting and irradiation calculations are carried out with DIVA-for-Grasshopper. The irradiation simulations are needed for simplifying the PSS complex geometries in order to perform thermal calculations with EnergyPlus. The results revealed that the use of PSS on façades is effective for enhancing DAv at the four orientations, in terms of the actual fully daylit area and the useful daylight illuminances. In comparison with fully and partly glazed façades, PSS increased the electrical lighting use but they considerably decreased the cooling energy use. Since lighting resulted lower and less influencing than cooling, PSS effectively reduced the total annual energy consumption. Therefore, optimizing daylighting through PSS can lead to low energy projects.

ACS Style

Doris A. Chi; David Moreno-Rangel; Jaime Navarro. Impact of perforated solar screens on daylight availability and low energy use in offices. Advances in Building Energy Research 2018, 15, 117 -141.

AMA Style

Doris A. Chi, David Moreno-Rangel, Jaime Navarro. Impact of perforated solar screens on daylight availability and low energy use in offices. Advances in Building Energy Research. 2018; 15 (1):117-141.

Chicago/Turabian Style

Doris A. Chi; David Moreno-Rangel; Jaime Navarro. 2018. "Impact of perforated solar screens on daylight availability and low energy use in offices." Advances in Building Energy Research 15, no. 1: 117-141.

Journal article
Published: 01 March 2018 in Building and Environment
Reads 0
Downloads 0

This paper examines the relationship between the Daylight Availability (DAv) metric and annual energy consumption. DAv was established as a means of describing indoor daylight sufficiency both for research and practical purposes. To balance daylighting with energy concerns, the specific amount of daylight sufficiency within a space should neither be too low; nor should it be excessive. However, there is little if any notion of what the relationship between a DAv area and the energy used on-site to supply the artificial lighting, heating and cooling systems might be. The aim of this research is to determine if one or more of the DAv areas predicted on the workplane could serve as a proxy for the overall building energy consumption (lighting plus heating and cooling). The office setting is designed to offer a wide range of daylight exposures, depending on the orientation of the fully-glazed façade and that of the perforated solar screen configuration. Results indicated a strong linear relationship between the overlit area and the cooling energy use. Moreover, confining the overlit area to less than 40% at South and less than 50% at North, East and West could help limit the overall energy consumption to less than 120 kWh/m2-year.

ACS Style

Doris A. Chi; David Moreno; Jaime Navarro. Correlating daylight availability metric with lighting, heating and cooling energy consumptions. Building and Environment 2018, 132, 170 -180.

AMA Style

Doris A. Chi, David Moreno, Jaime Navarro. Correlating daylight availability metric with lighting, heating and cooling energy consumptions. Building and Environment. 2018; 132 ():170-180.

Chicago/Turabian Style

Doris A. Chi; David Moreno; Jaime Navarro. 2018. "Correlating daylight availability metric with lighting, heating and cooling energy consumptions." Building and Environment 132, no. : 170-180.

Journal article
Published: 01 November 2017 in Building and Environment
Reads 0
Downloads 0
ACS Style

Doris A. Chi; David Moreno-Rangel; Jaime Navarro. Design optimisation of perforated solar façades in order to balance daylighting with thermal performance. Building and Environment 2017, 125, 383 -400.

AMA Style

Doris A. Chi, David Moreno-Rangel, Jaime Navarro. Design optimisation of perforated solar façades in order to balance daylighting with thermal performance. Building and Environment. 2017; 125 ():383-400.

Chicago/Turabian Style

Doris A. Chi; David Moreno-Rangel; Jaime Navarro. 2017. "Design optimisation of perforated solar façades in order to balance daylighting with thermal performance." Building and Environment 125, no. : 383-400.

Articles
Published: 23 June 2016 in Journal of Building Performance Simulation
Reads 0
Downloads 0

This paper analyses the influence of different perforated solar screens (PSS) in annual daylight conditions expressed using climate-based daylight metrics. The PSS design require parametric studies that are often complex and time consuming due to a large number of simulations. Hence, a new methodology is proposed to optimize PSS design by applying Design of Experiments using Orthogonal Arrays (DOA). A case study from the DOA perspective has been conducted, which involves an office space in Seville, Spain. The goal is to assess the effect of the following PSS design variables in daylighting performance: perforation percentage, matrix, shape and orientation. DOA results reveal that optimized PSS can increase daylit area by 33% and reduce over lit area by 35%, compared with reference models with no PSS. DOA method reduces the number of simulations from the 256 required to 16, so it could save time during the initial stages of building design.

ACS Style

Doris A. Chi; David Moreno; Paula M. Esquivias; Jaime Navarro; Doris Abigail Chi Pool. Optimization method for perforated solar screen design to improve daylighting using orthogonal arrays and climate-based daylight modelling. Journal of Building Performance Simulation 2016, 10, 1 -17.

AMA Style

Doris A. Chi, David Moreno, Paula M. Esquivias, Jaime Navarro, Doris Abigail Chi Pool. Optimization method for perforated solar screen design to improve daylighting using orthogonal arrays and climate-based daylight modelling. Journal of Building Performance Simulation. 2016; 10 (2):1-17.

Chicago/Turabian Style

Doris A. Chi; David Moreno; Paula M. Esquivias; Jaime Navarro; Doris Abigail Chi Pool. 2016. "Optimization method for perforated solar screen design to improve daylighting using orthogonal arrays and climate-based daylight modelling." Journal of Building Performance Simulation 10, no. 2: 1-17.