Exergy analysis for day lighting, electric lighting and space cooling systems for a room space in a tropical climate

Mahlia, T.M.I.; Taufiq, B.N.; Ong, Kien-Chai; Saidur, R.

doi:10.1016/j.enbuild.2011.03.011

Cited by 13 publications

(5 citation statements)

References 22 publications

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“…Furthermore, Malaysia's equatorial climate with high temperatures and humidity necessitates the extensive use of air conditioning systems, contributing to increased energy consumption [10]. However, Malaysia's abundant solar radiation offers a promising opportunity to harness solar energy as a sustainable alternative [11]. As the country focuses on reducing its carbon footprint and promoting renewable energy, the adoption of solar power can help mitigate the energy demands associated with air conditioning systems, leading to a more sustainable future [11][12][13].…”

Section: Malaysia's Climate Energy Consumption and Solar Radiationmentioning

confidence: 99%

“…However, Malaysia's abundant solar radiation offers a promising opportunity to harness solar energy as a sustainable alternative [11]. As the country focuses on reducing its carbon footprint and promoting renewable energy, the adoption of solar power can help mitigate the energy demands associated with air conditioning systems, leading to a more sustainable future [11][12][13].…”

Section: Malaysia's Climate Energy Consumption and Solar Radiationmentioning

confidence: 99%

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Sustainable Urban Energy Solutions: Investigating the Solar Potential of Vertical Façades Amidst Adjacent Buildings in Kuala Lumpur, Malaysia

Haitham Esam Rababah,

Azhar Ghazali,

Mohd Hafizal Mohd Isa

et al. 2023

ARASET

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This article explores the impact of adjacent buildings on solar exposure for photovoltaic (PV) applications in high-rise urban areas in Malaysia. The rapid urbanization and population density in Malaysia's high-rise areas have increased energy demand, necessitating the exploration of alternative energy sources. Integrating PV systems into vertical façades offers a promising solution for maximizing energy generation in space-constrained urban environments. However, the efficacy of PV systems is influenced by adjacent buildings, including their arrangement, height, and orientation, which affect solar exposure and energy generation potential. Understanding these effects is crucial for optimizing PV system design and placement. This study aims to investigate the relationship between adjacent buildings and solar exposure for PV panels mounted on high-rise buildings in Malaysia. By examining these effects, the research provides valuable insights for urban planners, architects, and renewable energy practitioners involved in sustainable urban development. The findings will inform decisions regarding the integration of PV systems, promoting renewable energy adoption, and reducing the environmental impact of urban areas. The article also discusses Malaysia's climate, energy consumption, and solar radiation potential, emphasizing the need to harness solar energy in a country blessed with abundant sunlight. The challenges faced by current air conditioning systems and building-integrated photovoltaic (BIPV) applications in Malaysia are outlined, along with efforts to address them through energy-efficient systems and awareness campaigns. The research conducted simulations using a 3D model in Kuala Lumpur, Malaysia, considering different heights and distances of adjacent buildings. The software used for simulations was IES-VE, which offers various modules for energy consumption analysis. The results demonstrate how adjacent buildings affect the annual average energy for different scenarios, highlighting the importance of distance and height. The findings provide insights into the monthly average energy variations and emphasize the relationship between adjacent building height and average energy levels. Overall, this research contributes to the efficient utilization of vertical façades for harnessing solar energy in high-rise urban areas, supporting Malaysia's sustainable energy goals while ensuring urban environment liveability and resilience.

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Section: Malaysia's Climate Energy Consumption and Solar Radiationmentioning

confidence: 99%

Section: Malaysia's Climate Energy Consumption and Solar Radiationmentioning

confidence: 99%

Sustainable Urban Energy Solutions: Investigating the Solar Potential of Vertical Façades Amidst Adjacent Buildings in Kuala Lumpur, Malaysia

Haitham Esam Rababah,

Azhar Ghazali,

Mohd Hafizal Mohd Isa

et al. 2023

ARASET

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“…Instead, analyses using both the first and the second laws of thermodynamics need to be considered. This requires combining exergy and energy analyses towards the goal of sensible improvements in building performances [ 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Cascaded Thermodynamic and Environmental Analyses of Energy Generation Modalities of a High-Performance Building Based on Real-Time Measurements

Doury

Ozkan

Mengüç

2020

Entropy

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This study presents cascaded thermodynamic and environmental analyses of a high-performance academic building. Five different energy efficiency measures and operation scenarios are evaluated based on the actual measurements starting from the initial design concept. The study is to emphasize that by performing dynamical energy, exergy, exergoeconomic, and environmental analyses with increasing complexity, a better picture of building performance indicators can be obtained for both the building owners and users, helping them to decide on different investment strategies. As the first improvement, the original design is modified by the addition of a ground-air heat exchanger for pre-conditioning the incoming air to heat the ground floors. The installation of roof-top PV panels to use solar energy is considered as the third case, and the use of a trigeneration system as an energy source instead of traditional boiler systems is considered as the fourth case. The last case is the integration of all these three alternative energy modalities for the building. It is determined that the use of a trigeneration system provides a better outcome than the other scenarios for decreased energy demand, for cost reduction, and for the improved exergy efficiency and sustainability index values relative to the original baseline design scenario. Yet, an integrated approach combining all these energy generation modalities provide the best return of investment.

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“…Building's energy demand is based purely on physical balances between the environment and the building (Itard, 2005). Mahlia, Taufiq, Ong, and Saidur (2011) developed a methodology to conduct exergy analysis and applied it in a tropical climate on space cooling, day lighting, and electric lighting system in a room space. It was observed that the day lighting system consumed about 28% of the full exergy, the wall consumed 78% of the total exergy in the day lighting system.…”

Section: Introductionmentioning

confidence: 99%

Internal Microclimate: Cumulative Exergy Consumption in a Sandcrete and a Burnt Brick- Walled Structure

Ibrahim¹,

Adedeji²

2020

Nig. J. Technol. Dev.

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Current practices of planning and designing of buildings in Nigeria do not consider the thermal comfort, the building energy and exergy demand. There is a need for better understanding of exergy analysis to improve the quality match between building energy demand and supply. The aim of this study is to estimate the exergy consumption value for a hollow sandcrete and a burnt brick-walled structure in a tropical sub-region. The properties of the building were assessed, eQuest software was used to estimate the energy demand of the respective buildings and the exergy analysis was conducted using the exergetic factor of electricity. The cumulative exergy consumptions of the existing sandcrete-walled building, the modelled sandcrete and the burnt brick-walled building were found to be 246,074.4 MJ/year, 128,646 MJ/year, and 128,595.6 MJ/year respectively. The modelled sandcrete-walled building, as well as the burnt brick-walled building, were found to be 48% more energy efficient than the existingbuilding as a result of improving the airtightness of the building, reducing the solar heat gain, and utilizing extremely efficient systems. However, the exergy analysis suggested that the hollow burnt brick-walled building perform better than the hollow sandcrete-walled building. Keywords: Building, electricity, energy, eQuest, exergy, sandcrete.

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Exergy analysis for day lighting, electric lighting and space cooling systems for a room space in a tropical climate

Cited by 13 publications

References 22 publications

Sustainable Urban Energy Solutions: Investigating the Solar Potential of Vertical Façades Amidst Adjacent Buildings in Kuala Lumpur, Malaysia

Sustainable Urban Energy Solutions: Investigating the Solar Potential of Vertical Façades Amidst Adjacent Buildings in Kuala Lumpur, Malaysia

Cascaded Thermodynamic and Environmental Analyses of Energy Generation Modalities of a High-Performance Building Based on Real-Time Measurements

Internal Microclimate: Cumulative Exergy Consumption in a Sandcrete and a Burnt Brick- Walled Structure

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