Impact of Passive Energy Efficiency Measures on Cooling Energy Demand in an Architectural Campus Building in Karachi, Pakistan

Bughio, Mushk; Khan, Muhammad Shoaib; Mahar, Waqas Ahmed; Schuetze, Thorsten

doi:10.3390/su13137251

Cited by 17 publications

(10 citation statements)

References 34 publications

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“…Despite the BIM uses and benefits, its application in the heritage sector is still in the early stages because of the divergence of heritage projects. The heritage buildings exhibit complex geometries [21]; hence, it is difficult to standardize heritage buildings. Traditionally, a project information model (PIM) is developed from the data generated during a BIM workflow's design and construction stages.…”

Section: Literature Reviewmentioning

confidence: 99%

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An Integrated HBIM Framework for the Management of Heritage Buildings

et al. 2022

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Heritage buildings are subject to severe damage due to their exposure to dynamics such as environmental changes, earthquakes, structural loads, etc., thus needing a proper maintenance and management system. However, during the restoration, maintenance, and management process, heritage building practitioners face numerous challenges, such as inefficient project management, financial loss, and project delay. These problems arise due to a lack of digital documentation and updated information management systems. Heritage building management still uses traditional management techniques where heritage information is managed using multiple format systems by different professionals, thus missing collaboration, information integration, and interoperability. Building information modeling (BIM) is presented here as a supporting tool to address these issues. The aim of this study is to develop a novel HBIM framework to manage heritage buildings in an integrated and interoperable environment that supports 3D digital documentation to conserve a heritage building and facilitate restoration planning and facility management (FM) activities. Moreover, we demonstrate FM integration with BIM to promote this digital technique. The results indicate that the proposed framework is feasible and effective in providing information integration and communication between stakeholders in managing heritage buildings.

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Section: Literature Reviewmentioning

confidence: 99%

“…Building units had been added to the historic site at different phases of its life cycle. Building units are two-and three-story high [21,42].…”

Section: Ned Heritage Building and Information Collectionmentioning

confidence: 99%

An Integrated HBIM Framework for the Management of Heritage Buildings

et al. 2022

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“…The methods estimating the evolution of climate change within the Global Climate Models (GCMs) are numerical models of the physical processes that characterise the global climate system, comprising the atmosphere, oceans, cryosphere and land surface. Conferring to the Fourth Assessment Report of the IPCC (AR4) [49], the buildings sector has the most significant potential for climate change mitigation, and the development of mitigation when the adaptation strategies become a key challenge for building professionals [20,23,50,51]. The current work explores the IPCC emission based on the Meteonorm database [52], which presents a stochastic weather data generator and a spatial interpolation tool.…”

Section: Ipcc Scenarios and Weather Files Criteriamentioning

confidence: 99%

Prediction of Climate Change Effect on Outdoor Thermal Comfort in Arid Region

et al. 2021

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Climate change and expected weather patterns in the long-term threaten the livelihood inside oases settlements in arid lands, particularly under the recurring heat waves during the harsh months. This paper investigates the impact of climate change on the outdoor thermal comfort within a multifamily housing neighborhood that is considered the most common residential archetype in Algerian Sahara, under extreme weather conditions in the summer season, in the long-term. It focuses on assessing the outdoor thermal comfort in the long-term, based on the Perceived Temperature index (PT), using simulation software ENVI-met and calculation model RayMan. Three different stations in situ were conducted and combined with TMY weather datasets for 2020 and the IPCC future projections: A1B, A2, B1 for 2050, and 2080. The results are performed from two different perspectives: to investigate how heat stress evolution undergoes climate change from 2020 till 2080; and for the development of a mathematical algorithm to predict the outdoor thermal comfort values in short-term, medium-term and long-term durations. The results indicate a gradual increase in PT index values, starting from 2020 and progressively elevated to 2080 during the summer season, which refers to an extreme thermal heat-stress level with differences in PT index averages between 2020 and 2050 (+5.9 °C), and 2080 (+7.7 °C), meaning no comfortable thermal stress zone expected during 2080. This study gives urban climate researchers, architects, designers and urban planners several insights into predicted climate circumstances and their impacts on outdoor thermal comfort for the long-term under extreme weather conditions, in order to take preventive measures for the cities’ planning in the arid regions.

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“…These measures include microclimate, natural ventilation, daylighting, orientation, thermal insulation, shading, construction materials, and so on [4]. Bughio et al [5] developed a model based on data related directly and indirectly to the energy use of an architectural campus building in Karachi (the climate hot and humid), to study the energy reduction potential by reducing indoor temperature and cooling energy demand. They investigated the impact of passive energy efficiency measures (PEEMs) on the potential reduction of indoor temperature and cooling load.…”

Section: Introductionmentioning

confidence: 99%

“…A variety of studies have been conducted to show different measures of energy savings in university buildings, office buildings, and others, in regions with hot and humid climates. Bughio et al [5] found that renovating the building envelope design and construction on a university campus, has reduced heat transfer through walls by 51%, windows by 50%, and roof by 30%. Solar gains were also reduced by 57%.…”

Section: Introductionmentioning

confidence: 99%

An analysis into the alternative strategies of substantial energy saving for the facilities of University of Jeddah, Khulais branch

Janajrah

2022

Mehran Univ. res. j. eng. technol.

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The main objective of this study is to develop strategies which aim to improve the energy saving and the sustainability at the University of Jeddah (UJ) - Khulais branch. The energy saving can be improved by reducing -indirectly- the cooling load, while the sustainability can be improved by recycling the sewage water, generating energy from the solar irradiance and improving land-use efficiency. Initially, the main reasons for increasing energy consumption in the buildings were identified. The most important reasons were large heat gain through the flat rooftops and sidewalls, infiltration and exfiltration, partial damage to the insulation materials of walls and ceilings, and thermal mass. To reduce the heat gained through buildings' rooftops, it is proposed to shade the rooftops by tilted and ventilated airgap Building Integrated Photovoltaic (BIPV). BIPV also help to improve the shading efficiency, land use efficiency, natural cooling of the rooftops and PV modules, Energy Efficiency Rating (EER) of the air-cooled ac system, and efficiency of night ventilation system. To reduce heat gained through the sidewalls, it is proposed to shade the walls by planting long-stemmed trees (Eucalyptus) around the buildings. Irrigating the trees by gray water will improve the sustainability and improve Leed Credit Point. Previous studies and current measurements of solar radiation under shaded surfaces have shown that shading the building is an appropriate strategy to reduce solar heat gain. Startup load of air conditioning system is another source of increasing energy use and it forms around 10-20% of the total cooling load due to high indoor temperature at the morning. As the buildings are not occupied after 3:00 PM, and during weekends, it is proposed to use mechanical night ventilation to reduce the indoor temperature and to improve the air quality. Connecting the ventilation system with a separate control system and the BMS at the buildings help to reach to the possible minimum indoor temperature.

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Impact of Passive Energy Efficiency Measures on Cooling Energy Demand in an Architectural Campus Building in Karachi, Pakistan

Cited by 17 publications

References 34 publications

An Integrated HBIM Framework for the Management of Heritage Buildings

An Integrated HBIM Framework for the Management of Heritage Buildings

Prediction of Climate Change Effect on Outdoor Thermal Comfort in Arid Region

An analysis into the alternative strategies of substantial energy saving for the facilities of University of Jeddah, Khulais branch

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