Photovoltaic rooftop's contribution to improve building-level energy resilience during COVID-19 work-from-home arrangement

Wang, Thomas J.; Ye, Zongnan; Hsu, Shu-Chien; Chen, Jieh Haur

doi:10.1016/j.esd.2022.03.009

Cited by 14 publications

(2 citation statements)

References 52 publications

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“…With the COVID-19 pandemic, and may be similar future virus that required lock À in at houses, and subsequently domestic electricity; requires real change to conventional energy consumption pattern especially in the residential sector. A recent study in Hong Kong [48] quantified the increased energy demand during workfrom-home arrangement, using high-rise public residential buildings, where its government announced work-fromhome arrangement four times in 2020 which led to a 9% residential energy demand increase where photovoltaic rooftop can supplement this increased energy demand. It was shown [48] that during the four work-from-home periods, photovoltaic system could have supplemented 6.8% to 11% of the increased energy demand, mainly subject to the airconditioning operation and solar generation.…”

Section: The Pay-back Periodmentioning

confidence: 99%

The performance of four domestic rooftop 7.8 kW − PV in the Kingdom of Bahrain: toward low building emission

Alnaser

2023

Renew. Energy Environ. Sustain.

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This paper reports the performance of four domestic houses at different locations in Bahrain, each have 7.8 kW of PV on the roof, and all panels are tilted at 12°, but the azimuth of the panels (orientation) in these houses varies slightly from south (±10°); depending on roof space availability and building surroundings. The data of year 2019 have been used because all these domestic houses were monitored, maintained, and cleaned by an assigned company from the government. The annual solar electricity generated was 11,329 kWh, 11,448 kWh, 10,978 kWh, and 9995 kWh for houses # 4, # 2, #1, and # 3, respectively. The annual Specific Yield (SY) obtained was 1468 kWh/kW, 1452 kWh/kW, 1407 kWh/kW and 1254 kWh/kW for houses # 2, #4, # 1, and # 3, respectively; this makes the daily average SY equals to 4.02 kWh/kW, 3.98 kWh/kW, 3.85 kWh/kW, and 3.43 kWh/kW, respectively. The average performance ratio (PR) of each PV system were found to range from 75.1% to 65.6%. The PV system performs better in house #4 due to its azimuth PV panels' angle (orientation) which is closest to the south direction. A polynomial equation is established, relating the month number (X) and the monthly average of monthly solar electricity generated as well as the monthly specific yield (Y). This work shows that installing a 7.8 kWp of PV on the roof of all residential building in Bahrain will reduce the total CO2 emission in Bahrain by 39.0% (4.637 tons) per year, saving 38,567 ft3 of natural gas. This is a step towards low-carbon building; in an attempt to make Bahrain a zero carbon by 2060.

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Section: The Pay-back Periodmentioning

confidence: 99%

The performance of four domestic rooftop 7.8 kW − PV in the Kingdom of Bahrain: toward low building emission

Alnaser

2023

Renew. Energy Environ. Sustain.

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“…Su et al [23] compared the energy consumption pattern and indoor air quality of a large green commercial building in China and reported that the building energy consumption decreased by an average of 55.4% and the indoor air quality compliance rate increased. Lastly, Wang et al [24] developed a building energy model to simulate the energy demand under the work-from-home situation by adjusting the occupancy and building operation schedules and reported a 9% increase in energy demand.…”

Section: Introductionmentioning

confidence: 99%

Electricity Consumption in Higher Education Buildings in Thailand during the COVID-19 Pandemic

2022

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The COVID-19 pandemic forced higher education institutions to switch to online learning for most of 2020 and 2021 for the safety of their students and staff, which significantly impacted campus resource consumption. This study aims to analyze the changes in electricity consumption in higher education buildings based on comparisons of three academic years to understand more about the energy implications of the post-COVID-19 era. The electricity data were collected from 181 samples of the electricity meter records at Chulalongkorn University, Thailand. When compared to the typical academic year in 2018, the results indicate that electricity consumption in 2019 and 2020 decreased by 20.92% and 35.50%, respectively. The academic and the library-type buildings marked the biggest change in electricity reduction. The smallest change was found in the research type as its essential work remained on campus. Only electricity consumption in the residence type increased due to the long periods of online learning policies. Finally, the findings suggest that teaching and learning activities have a strong influence on electricity consumption in higher education buildings. The facilities and learning methods related to these activities should be carefully discussed as elements of an effective strategy to manage electricity demands at the university level.

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Energy yield of solar PV in 34 Indonesian cities with respect to various roof pitches and orientations

Paramita,

Mangkuto,

Djafar

et al. 2024

Int. J. Environ. Sci. Technol.

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Photovoltaic rooftop's contribution to improve building-level energy resilience during COVID-19 work-from-home arrangement

Cited by 14 publications

References 52 publications

The performance of four domestic rooftop 7.8 kW − PV in the Kingdom of Bahrain: toward low building emission

The performance of four domestic rooftop 7.8 kW − PV in the Kingdom of Bahrain: toward low building emission

Electricity Consumption in Higher Education Buildings in Thailand during the COVID-19 Pandemic

Energy yield of solar PV in 34 Indonesian cities with respect to various roof pitches and orientations

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