71 results match your criteria: "Applied Energy[Journal]"

Article Synopsis
  • During the COVID-19 pandemic, higher outdoor air flow requirements for ventilation systems increased building energy consumption, prompting the need for energy-efficient strategies to mitigate infection risks.
  • The study developed an occupant-number-based model predictive control (OBMPC) algorithm, using occupancy and HVAC data to predict room occupancy with up to 95% accuracy in short-term forecasts.
  • The OBMPC model can significantly reduce energy loads by about 52% while maintaining low infection risk levels, but uncertainties in occupancy predictions can lead to notable variations in ventilation demand, temperature, and airflow rates.
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Article Synopsis
  • The COVID-19 pandemic led to significant changes in electricity demand patterns due to shelter-in-place orders and business closures, creating uncertainty for the power grid.
  • This analysis shows that while residential electricity usage shifted to resemble weekend patterns during the spring of 2020, commercial electricity usage declined but its overall usage profile remained stable.
  • Understanding these shifts requires examining data at different levels (utility, customer class, and state) to capture the nuanced impacts on electricity consumption and sales during the pandemic.
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Balances in the energy sector have changed since the implementation of the Covid-19 pandemic lockdown in Europe. This paper analyses how the lockdown affected electricity generation in European countries and how it will reshape future energy generation. Monthly electricity generation from total renewables and non-renewables in France, Germany, Spain, Turkey, and the UK from January 2017 to September 2020 were evaluated and compared.

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Article Synopsis
  • OECD economies are experiencing a growth in information and communication technology (ICT) investments due to the COVID-19 pandemic and environmental emission reduction goals.
  • Using advanced models, the study analyzes how ICT investments affect carbon emissions across 20 OECD countries from 2000 to 2018, revealing that nine countries achieved a strong decoupling of ICT investment from emissions by 2018.
  • The findings indicate that while ICT investment intensity tends to increase carbon emissions, the structure and efficiency of these investments can limit emissions growth, highlighting the need for effective energy policies post-pandemic.
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COVID-19 impacts on residential occupancy schedules and activities in U.S. Homes in 2020 using ATUS.

Appl Energy

October 2022

Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, United States.

Many aspects of the daily lives of those living in the United States were substantially impacted by the COVID-19 pandemic in the year 2020. A broad diversity of measures was implemented to curb the spread of the virus, many of which included adjustments to where and how people worked, went to school, and otherwise conducted their daily lives compared to pre-pandemic times. This has impacted how residential buildings are used, how much time people spend in their homes, and as a result, how much energy these buildings consume.

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The effects and reacts of COVID-19 pandemic and international oil price on energy, economy, and environment in China.

Appl Energy

November 2021

Research center for energy economics and low-carbon development, Minjiang University, Fuzhou 350108, PR China.

In 2020, the world experienced several significant events, including the COVID-19 pandemic and the collapse of international crude oil prices. Both have a great impact on a sustainable economy. Taking China as an example, we use a computable general equilibrium model with multi-sectors and multi-households and consider six different scenarios to simulate and evaluate the aggregate impacts of the pandemic and crude oil prices.

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Article Synopsis
  • - Global carbon emissions are rising rapidly, which is harmful to the climate, making it crucial to achieve carbon neutrality.
  • - The COVID-19 pandemic caused a decline in international student flights, resulting in a significant reduction in aviation carbon emissions, estimated at 1326 Gg.
  • - The study discusses the impact of current carbon mitigation policies and offers suggestions for future strategies to further reduce emissions.
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The impact of online education on carbon emissions in the context of the COVID-19 pandemic - Taking Chinese universities as examples.

Appl Energy

May 2022

School of Humanities and Social Sciences, Beijing Institute of Technology, Room 411, Central Building, South Street of Zhongguancun, Haidian, Beijing 100084, China.

While the COVID-19 pandemic has had various impacts on economic and social development, it may have partially reduced human energy use, thereby helping achieve the goals of reducing carbon emissions and promoting carbon neutrality. During the pandemic, online education was widely used to replace traditional education all over the world. There is a lack of empirical studies on whether and to what extent the change of education model can reduce carbon emissions.

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Article Synopsis
  • - This paper introduces a time-series stochastic socioeconomic model aimed at analyzing the pandemic's impact on the electricity market, using a combination of an optimized tariff model and random walk techniques for better accuracy in both historical and future assessments.
  • - The study focuses on six Brazilian concession areas and finds that consumers are significantly affected by increased electricity tariffs due to the pandemic, resulting in estimated socioeconomic welfare losses averaging 500 million R$/month, while power distribution companies remain relatively unscathed thanks to regulatory support like the COVID-account.
  • - To address these challenges, the paper proposes a stochastic optimization strategy that balances the interests of consumers, power distribution companies, and the government, successfully suggesting tariff adjustments that help offset demand reductions and enhance overall market welfare.
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Article Synopsis
  • The COVID-19 pandemic has significantly altered global energy production and consumption, prompting a re-evaluation of conventional load forecasting methods, which may not be effective during this period.
  • This paper introduces a new load forecasting method using multi-task learning and long short-term memory networks, integrating mobility data to better capture load patterns impacted by the pandemic, leading to more accurate forecasts.
  • The study employs real public data for extensive testing, highlighting the shortcomings of traditional forecasting models and demonstrating that the new approach can achieve high accuracy (with errors mostly under 1%) while also utilizing game theory to enhance model objectivity and reveal the importance of mobility indicators.
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Global low-carbon energy transition in the post-COVID-19 era.

Appl Energy

February 2022

Integrated Research for Energy, Environment and Society (IREES), Energy and Sustainability Research Institute Groningen, University of Groningen, Groningen 9747 AG, the Netherlands.

The COVID-19 pandemic has created significant challenges for energy transition. Concerns about the overwhelming emphasis on economic recovery at the cost of energy transition progress have been raised worldwide. More voices are calling for "green" recovery scheme, which recovers the economy while not compromising on the environment.

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Article Synopsis
  • The paper discusses the increased focus on indoor air quality and mechanical ventilation due to the COVID-19 pandemic, specifically investigating stratum ventilation as a means to improve health and comfort indoors.
  • Stratum ventilation delivers fresh air directly into the breathing zone, and the study highlights how the spacing of parallel jets affects airflow, thermal performance, and energy efficiency.
  • Using validated computational fluid dynamics (CFD) models, the research explores various jet spacing configurations across different climates, ultimately identifying optimal setups for maximizing indoor comfort and energy use.
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Evaluating long-term emission impacts of large-scale electric vehicle deployment in the US using a human-Earth systems model.

Appl Energy

October 2021

Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA.

While large-scale adoption of electric vehicles (EVs) globally would reduce carbon dioxide (CO) and traditional air pollutant emissions from the transportation sector, emissions from the electric sector, refineries, and potentially other sources would change in response. Here, a multi-sector human-Earth systems model is used to evaluate the net long-term emission implications of large-scale EV adoption in the US over widely differing pathways of the evolution of the electric sector. Our results indicate that high EV adoption would decrease net CO emissions through 2050, even for a scenario where all electric sector capacity additions through 2050 are fossil fuel technologies.

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Hospital-oriented quad-generation (HOQG)-A combined cooling, heating, power and gas (CCHPG) system.

Appl Energy

October 2021

Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, United Kingdom.

Article Synopsis
  • The paper proposes a novel hospital-oriented quad-generation (HOQG) system to provide combined cooling, heating, power, and medical gas supplies, addressing increased demands during the COVID-19 pandemic.
  • It utilizes local renewable energy sources, high temperature superconducting cables, and superconducting magnetic storage to enhance energy efficiency and ensure reliable power delivery compared to conventional systems.
  • The system also incorporates cryogenic fluids for backup energy and medical gas supply, benefiting patient care and vaccine delivery while promoting energy conservation and reduced emissions.
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The COVID-19 pandemic hit societies in full force in 2020 and compelled people all around the world to change their lifestyle. The time spent at home significantly surged during the pandemic and this change in occupancy can have a direct impact on building energy consumption. COVID-19 lockdowns also accelerated the transition towards telework, a trend that many expect to last.

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Article Synopsis
  • This study examines how water and electricity use changed during the COVID-19 pandemic across different socioeconomic sectors in Doha, Qatar, highlighting a lack of prior research in this area.
  • Using five geospatial techniques and statistical tools in GIS, the research identified hot spots (high consumption areas) and cold spots (low consumption areas) of these resources at a block level.
  • The findings revealed that water and electricity consumption varied both spatially and temporally, with densely populated areas showing higher consumption, especially in residential sectors during lockdowns, indicating a positive relationship between the two resources.
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The death valley of coal - Modelling COVID-19 recovery scenarios for steam coal markets.

Appl Energy

April 2021

Workgroup for Economic and Infrastructure Policy, Technische Universität Berlin, Straße des 17, Juni 135, 10623 Berlin, Secretariat H33, Germany.

Article Synopsis
  • This paper explores the future of global steam coal production and trade, factoring in the effects of the COVID-19 pandemic and various recovery scenarios.
  • It presents different coal demand scenarios up to 2040 that show the pandemic’s lasting impact on the market, suggesting a slower recovery than desired.
  • The findings point out that even with reduced consumption in a post-COVID world, levels remain too high to meet global climate goals, stressing the need for focused policies to manage coal decline and support vulnerable regions.
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The widespread COVID-19 pandemic led to a shortage in the supply of N95 respirators in the United States until May 2021. In this study, we address the energy, environmental, and economic benefits of the decontamination-and-reuse of the N95 masks. Two popular decontamination methods, including dry heat and vapor hydrogen peroxide (VHP), are investigated in this study for their effective pathogen inactivation and favorable performance in preserving filtration efficiency and structural integrity of respirators.

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Implications of COVID-19 lockdowns on surface passenger mobility and related CO emission changes in Europe.

Appl Energy

October 2021

Integrated Research on Energy, Environment and Society (IREES), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen 9747AG, the Netherlands.

The coronavirus pandemic has severely affected our daily lives, with direct consequences on passenger transport. This in turn has strongly impacted the energy demand of the transport sector and associated CO emissions. We analyse near real-time passenger mobility and related emission trends in Europe between 21 January and 21 September 2020.

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Article Synopsis
  • Approximately 2.8 billion people use polluting fuels for cooking, and the high cost of clean options like LPG makes it challenging for low-income households to switch.
  • The study analyzes data from 426 PAYG LPG customers in Nairobi, Kenya, between 2018-2020, revealing that 95% continued using LPG during the COVID-19 lockdown, with cooking frequency and fuel consumption increasing.
  • Interviews highlighted additional benefits of PAYG LPG, such as improved safety, time savings, and easy cylinder delivery, suggesting that this technology can support access to clean cooking solutions.
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Trombe wall is a simple and mature passive solar building design while its utilization of solar energy is limited to space heating. Aerosol transmission, as a potential transmission pathway of COVID-19, poses a serious threat to the public health especially in a closed indoor environment. The thermal disinfection of virus, which can be easily integrated into solar systems, seems to be a suitable method for controlling bioaerosols.

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Circular economy for clean energy transitions: A new opportunity under the COVID-19 pandemic.

Appl Energy

May 2021

Department of Industrial Economics and Management INDEK, KTH Royal Institute of Technology, Lindstedsvägen 30, S-100 44 Stockholm, Sweden.

This paper models the energy and emissions scenarios for a circular economy based clean energy transitions in a 140,000-population town in China, taking into account the new situation encountered by the COVID-19 pandemic. The modelled scenarios propose new clean energy transition roadmaps towards a sustainable urban system through the implementation of circular economy strategies. This is represented by the cascading use of industrial excess heat to form symbiosis between factories and to cover the growing building heat demand, as well as by the electrification of the transport sector and reusing the batteries for a second life as energy storage devices.

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Radiant cooling-assisted natural ventilation is an innovative technical approach that combines new radiant cooling technology with natural ventilation to increase fresh air delivery into buildings year-round with minimal energy cost and improvment of air quality. Currently, the standard paradigm for HVAC (heating, ventilation and air conditioning) is based on central air systems that tie the delivery of heating and cooling to the delivery of fresh air. To prevent heat loss, the delivery of fresh air must be tightly controlled and is often limited through recirculation of already heated or cooled air.

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Article Synopsis
  • The COVID-19 pandemic significantly affected the power industry, leading to challenges in understanding the impacts of lockdown policies on electricity consumption.
  • A new prediction-based analysis method, called Rolling IMSGM(1,1), is introduced, utilizing an optimized grey prediction model to accurately forecast electricity usage during the pandemic.
  • The study analyzes historical power consumption data in China, revealing that the pandemic's impact on electricity demand varied by period, severity, and local policies, ultimately aiming to enhance future responses to similar emergencies.
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How did the German and other European electricity systems react to the COVID-19 pandemic?

Appl Energy

March 2021

SnT - Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg, Luxembourg City 1855, Luxembourg.

The first wave of the COVID-19 pandemic led to decreases in electricity demand and a rising share of Renewable Energy Sources in various countries. In Germany, the average proportion of net electricity generation via Renewable Energy Sources rose above 55 % in the first half of 2020, as compared to 47 % for the same period in 2019. Given these altered circumstances, in this paper we analyze how the German and other European electricity systems behaved during the COVID-19 pandemic.

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