Thermal performance of building envelope of ready-made garments (RMG) factories in Dhaka, Bangladesh

Chowdhury, Sajal; Ahmed, Khandaker Shabbir; Hamada, Yusuke

doi:10.1016/j.enbuild.2015.08.014

Cited by 12 publications

(4 citation statements)

References 20 publications

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“…Several simulation studies have been conducted on the thermal efficiency of the building envelope in different climatic conditions. Chowdhury et al [18] experimentally and numerically investigated the indoor thermal condition of the production spaces of the ready-made garment factory building in Dhaka, Bangladesh. The study considered two types of variables (material categories and exterior wall thickness) for the simulation studies where nineteen different exterior wall constructions were examined.…”

Section: Previous Investigationsmentioning

confidence: 99%

A Comparative Simulation Study of the Thermal Performances of the Building Envelope Wall Materials in the Tropics

et al. 2020

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The building walls which form the major part of the building envelope thermally interact with the changing surrounding environment throughout the day influencing the indoor thermal comfort of the space. This paper aims at assessing in detail the different aspects (thermophysical properties, thickness, exposure to solar heat gain, etc.) of opaque building wall materials affecting the indoor thermal environment and energy efficiency of the buildings in tropical climate (in the summer and winter days) by conducting simplified simulation analysis using the Integrated Environmental Solutions Virtual Environment (IES-VE) program. Besides, the thermal efficiency of a number of selected wall materials with different thermal properties and wall configurations was analysed to determine the most optimal option for the studied climate. This study first developed the conditions for parametric simulation analysis and then addressed selected findings by comparing the thermal responses of the materials to moderate outdoor temperature and energy-saving potential. While energy consumption estimation for a complete operational building is a complex method by which the performance of the wall materials cannot be properly defined, as a result, this simplistic simulation approach can guide the designers to preliminary analyse the different building wall materials in order to select the best thermal efficiency solution.

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Section: Previous Investigationsmentioning

confidence: 99%

A Comparative Simulation Study of the Thermal Performances of the Building Envelope Wall Materials in the Tropics

et al. 2020

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“…Chowdhury et al [20], monitored the conditions of a garment production building in Dhaka. The buildings were constructed with local bricks, which were classified as 1st, 2nd, 3rd class, and machine made; also, the building had no shading devices on the windows.…”

Section: General Measures For Limiting Heat Gains and Losses On Buildmentioning

confidence: 99%

Energy Savings on an Industrial Building in Different Climate Zones: Envelope Analysis and PV System Implementation

2020

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The energy market in Mexico is facing changes due to the incorporation of clean energy certificates (CEL) on the Electric Industry Law (LIE, Ley de la Industria Electrica). One of the aims is to increase the percentage of clean energy use in the national energy matrix. Consequently, the integration of energy efficiency strategies prior to the incorporation of renewables has become essential at different levels. Industrial buildings have significant heat gains and losses through the envelope, mainly due to their vast surface and simple construction systems. This work analyses the typical envelopes of industrial buildings in Mexico and the effect of industrial rooftop photovoltaic (PV) systems over the annual energy consumption. It was found that for temperate climates, the best option would be to insulate the roof. For cities with warm climates, the best approach is to implement a cool roof on a non-insulated layer or to simply insulate the roof. Additionally, the industrial buildings with metallic roofs situated in warmer climates would benefit the most from the implementation of rooftop PV systems. After all, the results point out that the decrease in the required CELs would not influence the savings.

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“…If the AV is less than 0.8 ms -1 , the comfort temperature needs to be reduced below 28.5°C and increasing the AV perceptibly improves the thermal comfort condition (Fatemi 2014, Humphreys 1970. Chowdhury, Hamada and Ahmed (2015) in their study on RMG factories in the Dhaka region recommended 24-28°C as a minimum AT range when RH is below 65% and a mean AV of is maintained.…”

Section: Thermal Comfort Assessment Criteriamentioning

confidence: 99%

“…Typically, however, minor or intermediate interventions (Ford, Phan and Francis 2010, 57-59) in the production spaces of RMG factories may be possible and can improve the thermal performance of existing built environment subject to factory owners' agreement (Authors 2014). A recent parametric study by Chowdhury, Ahmed and Hamada (2015) considered the thermal performance of RMG workspaces with respect to use of different building materials. However, these appear to be an absence of studies based on field evidence from RMG factories that quantifies existing ventilation and thermal conditions in different production workspaces.…”

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confidence: 99%

Effect of changing window type and ventilation strategy on indoor thermal environment of existing garment factories in Bangladesh

Hossain

Lau

Wilson

et al. 2017

Architectural Science Review

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This paper presents two workable solutions that can significantly improve the indoor thermal environment within the workspaces in existing ready-made garment (RMG) factories in the tropical climatic context of Bangladesh. The research involved field studies in three multi-storey factory buildings, semistructured interviews with workers and owners and simulation studies. Field data indicated that the effective window-opening size of existing buildings and limiting the ventilation strategy to occupied hours caused overheating of the indoor environment. Among a list of proposals, the building owners saw value in implementing two solutions (i.e. altering existing window type to one with a higher effective opening area and adopting a night-time ventilation strategy) in their existing buildings as well as proposed new buildings. To quantify the benefits of these two interventions, a validated simulation study on one of the buildings was conducted. The findings confirm that these two solutions can provide reductions of up to 23% in overheated hours during operational time and in so doing, improve workers' thermal comfort and well-being. IntroductionIn the tropical climatic context of Bangladesh, most of the workers in ready-made garment (RMG) factories suffer from discomfort in their workspaces and a range of health problems due to the high indoor air temperature and poor air distribution (Authors 2015; Authors 2014;Fatemi 2014). The workspaces include cutting, sewing and finishing sections. Workers' thermal discomfort also hampers productivity (Fatemi 2014), resulting in additional workload to meet production targets without any financial benefit. These workspaces, with a deep floor-plan and low ceiling heights, usually employ forced cross-ventilation using auxiliary extractor fans located on the external walls. However, the existing active ventilation strategies do not meet the thermal comfort needs of the workers with significant overheating observed in the middle part of the floor plate (Authors 2015) even in the presence a significant difference in 'wind pressure coefficient' between the inlet and outlet openings (CIBSE 2005) due to mechanical ventilation.Previous theoretical studies and empirical evidence suggest that improving the indoor thermal environment and air quality through the adaptation of available passive technologies can improve health, productivity and wellbeing of the workers in workspace offering financial benefits to both workers and factory owners (Fisk 2000;Hobday and Dancer 2013;Mahbob et al. 2011;Srinavin and Mohamed 2003). In particular, improving the thermal environment of RMG factories helps to reduce production errors up to 1.88% (Fatemi 2014), which may offer added commercial benefit to factory owners and their international buyers. In addition, effective implementation of natural ventilation in the factories can provide a natural environment for the workers and reduce electricity energy consumption and consequent greenhouse gas emissions (Wijewardane and Jayasinghe 2008). By adopting ...

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Thermal performance of building envelope of ready-made garments (RMG) factories in Dhaka, Bangladesh

Cited by 12 publications

References 20 publications

A Comparative Simulation Study of the Thermal Performances of the Building Envelope Wall Materials in the Tropics

A Comparative Simulation Study of the Thermal Performances of the Building Envelope Wall Materials in the Tropics

Energy Savings on an Industrial Building in Different Climate Zones: Envelope Analysis and PV System Implementation

Effect of changing window type and ventilation strategy on indoor thermal environment of existing garment factories in Bangladesh

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