Analysis of the Methodologic Assumptions of the NOM-020-ENER-2011—Mexican Residential Building Standard

Martín-Domínguez, Ignacio R.; Rodríguez-Muñoz, Norma A.; Romero-Perez, Claudia K.; Nájera-Trejo, Mario; Ortega-Ávila, Naghelli

doi:10.3390/environments5110118

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…In addition, local municipalities do not have the knowledge or proper technical skills to fully understand the energy deficiencies of buildings and proper funding is needed for the implementation of the existing normativity. An additional problem is that most municipal building standards fail to require the application of NOM-020, even though this federal regulation is currently active and mandatory, and since the local municipalities are the entities that grant building permits, NOM-020 is generally ignored [29]. Furthermore, according to the SmartMarket Report, in Mexico slightly more than one quarter (27%) of people do most of their projects green [30].…”

Section: Introductionmentioning

confidence: 99%

Thermal Energy Performance Simulation of a Residential Building Retrofitted with Passive Design Strategies: A Case Study in Mexico

Vargas

Hamui

2021

Sustainability

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High energy consumption as a result of an inefficient design has both economic and environmental repercussions throughout the life cycle of a building. In Mexico, the residential sector is the third-largest final energy consumer, therefore improving the performance of existing buildings is considered an effective method in achieving energy savings. Moreover, in Mexico warm climate regions predominate, which impacts energy consumption. This article examines a linked, single-family house located in the hot-humid climate city of Villahermosa, Tabasco (México). DesignBuilder software was used to conduct the thermal energy performance simulation of the existing building (base case) and to evaluate the energy-saving potentials by implementing different passive design strategies. As a result, the annual electricity consumption of the base case decreased a maximum of 2.0% with the passive design strategy in exterior windows, 4.9% in walls and, 13.7% reduction in roofs, the latter being the enclosure with the greatest reduction achieved. Nevertheless, a final adaptation proposal with the passive design strategies, whose results represented the highest energy savings, accomplished a total reduction of 23.5% with a payback period of 5.8 years.

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Section: Introductionmentioning

confidence: 99%

Thermal Energy Performance Simulation of a Residential Building Retrofitted with Passive Design Strategies: A Case Study in Mexico

Vargas

Hamui

2021

Sustainability

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Energy and Thermal Performance of Social Housing: Analysis of Heat Flow Through the Envelope and Comparison With International Schemes

Romero-Perez

Rodríguez-Muñoz

Almada

et al. 2019

Journal of Solar Energy Engineering

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Some of the greatest potentials for improving building energy efficiency are found in the residential sector. Social housing, in particular, has drawn heavy research interest because it affects the welfare of large populations, is the source of significant energy consumption, and has outsize importance in the construction and regulatory sectors. Energy regulation in Mexico focuses on reducing the energy needed to cool buildings down, neglecting the importance of heating buildings built in the colder regions of the country. To address this gap, the present work focuses on the thermal behavior of social housing in the regions of Mexico with cold semi-arid climate. We found that thermal discomfort inside houses is primarily driven by low temperatures. We calculated annual heat flows in houses, visualizing heat gains and losses through each part of the building envelopes, and found that the highest heat flows occur through the floor. We also found that windows have the greatest heat transfer per unit area of all construction elements. We estimated the energy that each building would require if heating and air conditioning were used throughout the year to bring indoor temperatures within the range of thermal comfort. Finally, we used evaluation schemas from several countries to evaluate the energy demand per unit area (kWh/m2) of several local houses in a typical year. The houses analyzed here presented low scores under these schemas.

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Cold Housing in Central Mexico: Environmental Dissatisfaction and Underheating Lowers Self-Perceived Health in Central Mexico

Zepeda-Gil

Montiel-Castro

2023

Buildings

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Despite being perceived as a warm country, winters in the Central Mexican Plateau frequently reach temperatures below zero Celsius. Prolonged exposures to low temperatures resulting in heart and respiratory morbidities are estimated to be responsible for 50% of the reported illness in the plateau, attributable primarily to the design of homes ill-suited to extreme temperatures. Consequently, there is a growing need to ensure that dwellings provide adequate indoor thermal conditions in the region. Hence, on-site sensors were used to collect temperature and relative humidity data every five minutes in 26 living rooms in the Plateau for 11 months. From these data, a subsample was determined, resulting in dwelling-level thermal comfort and health surveys on 15 homes. Computer simulations were used to investigate whether the building itself could provide thermal comfort under different retrofitting scenarios. Multiple linear regression relating the Predicted Percentage Dissatisfaction (PPD) index to self-perceived health was undertaken. Both monitored and simulated results were matched against our underheating model, finding that 92% of the homes had cold indoor environments, some even during summer. High PPD and intense levels of underheating were positive predictors of higher self-reported health problems. More self-reported health problems were correlated with both lower life satisfaction and self-worth, and with subjects’ use of more adaptive strategies against environmental dissatisfaction. Dynamic computer simulations suggested that indoor thermal environments could be improved by enforcing the non-utilised standard NOM-ENER-020, which recommends the addition of insulation on walls and roofs. These findings suggest that the cold environments within homes of the plateau influence the self-perceived physical and mental health of its population. Hence, the application of adequate measures, such as retrofitting homes with stronger standards than the existing NOM-ENER-020 are needed in place.

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Analysis of the Methodologic Assumptions of the NOM-020-ENER-2011—Mexican Residential Building Standard

Cited by 3 publications

References 8 publications

Thermal Energy Performance Simulation of a Residential Building Retrofitted with Passive Design Strategies: A Case Study in Mexico

Thermal Energy Performance Simulation of a Residential Building Retrofitted with Passive Design Strategies: A Case Study in Mexico

Energy and Thermal Performance of Social Housing: Analysis of Heat Flow Through the Envelope and Comparison With International Schemes

Cold Housing in Central Mexico: Environmental Dissatisfaction and Underheating Lowers Self-Perceived Health in Central Mexico

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