Article
Energy & Fuels
David Katzin, Leo F. M. Marcelis, Simon van Mourik
Summary: This study examines the energy savings potential of transitioning greenhouses from high-pressure sodium (HPS) to LED lighting in high latitude regions. The results show that transitioning to LEDs can lead to a 10-25% reduction in total energy consumption, but may also increase the demand for heating.
Article
Plant Sciences
Fatemeh Sheibani, Mike Bourget, Robert C. C. Morrow, Cary A. A. Mitchell
Summary: Research shows that reducing the vertical distance between LED lamps and crop surfaces can increase the photosynthetic photon utilization efficiency and crop yield. In the energy-efficiency strategy, energy utilization efficiency significantly improved as the separation distance between lamps and cropping surfaces decreased. In the yield-enhancement strategy, higher yields were achieved with the same energy expenditure at closer separation distances.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Environmental Sciences
Carsten Daugbjerg
Summary: Promoting organic farming through public procurement programmes has proven to be effective in increasing organic consumption, with both Denmark and Sweden implementing such measures. While the Danish programme relied on central government policy instruments, the Swedish programme focused on setting a national organic consumption goal for the public sector. The Swedish approach yielded better results and fostered greater local engagement.
ENVIRONMENTAL SCIENCE & POLICY
(2023)
Article
Urban Studies
Bernardino Benito, Maria-Dolores Guillam, Ana-Maria Rios
Summary: In summary, municipalities that manage their services more efficiently tend to be more transparent, as do wealthier and more indebted municipalities. Additionally, it appears that municipalities where the government has a majority, is right-wing, or has a female mayor are more willing to disclose information. Lower voter turnout is also associated with increased transparency in municipalities.
Article
Thermodynamics
Ahlem Ben Halima, Zouhour Araoud, Laurent Canale, Kamel Charrada, Georges Zissis
Summary: With LED lighting systems, 70% of the energy is lost as thermal energy. By converting this waste heat into light using Peltier modules, the efficiency of the system can be increased. This article evaluates the limitations of these solutions by examining the decrease in luminous efficiency of the LED system caused by the thermal effects of adding Peltier modules, compared to the potential gain in electrical power production.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Horatiu Albu, Dorin Beu, Tania Rus, Raluca Moldovan, Florin Domnita, Silvia Vilcekova
Summary: The presented study conducted a Life Cycle Assessment of a LED suspended luminaire manufactured in Romania using One Click LCA software. The main environmental impact of the LED luminaire was found to be generated by the operational energy use. The manufacturing stage was found to have a significant environmental impact due to the presence of aluminium in the luminaire body, fixing clips, LED module, and LED driver. The study also analyzed a lighting installation composed of the LED suspended luminaire and proposed implementing daylight system control to reduce operational energy use.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Haonan Yu, Jingming Chan, Balaji Devakumar, Xiaoyong Huang
Summary: In this article, a new highly efficient Mn4+ ion-activated Li3La3W2O12 (LLWO) far-red emitting phosphor was synthesized and characterized. The LLWO:Mn4+ phosphors exhibited bright narrowband far-red emission peaking at 719 nm, which matched well with the absorption spectrum of phytochrome PFR. The phosphors could be efficiently excited by both ultraviolet and blue LED chips, and a LED device utilizing the LLWO:1.2%Mn4+ phosphor showed dual emission bands of blue and far-red.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Economics
Najat El Asri, Youness Nouira, Ibtissam Maaroufi, Abdelghafour Marfak, Nour Saleh, Mohammed Mharzi
Summary: This article introduces a new method for integrating energy efficiency into the monitoring and controlling processes of public buildings in Morocco. By analyzing the process and identifying priority policies or actions through delegated project management, energy efficiency in public buildings can be achieved. This method does not require additional technical actions, but rather utilizes an optimal approach.
Article
Public, Environmental & Occupational Health
Ran Yan, Fuguo Cao
Summary: This article discusses the mechanism of strategic procurement in emergency situations and uses China's procurement practice in COVID-19 response as an example to propose recommendations for improving public health and governance.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Chemistry, Analytical
Milica Petkovic, Dragana Bajovic, Dejan Vukobratovic, Juraj Machaj, Peter Brida, Graeme McCutcheon, Lina Stankovic, Vladimir Stankovic
Summary: This paper proposes energy-efficient solutions for a smart LED lighting system, which aim to minimize energy consumption while meeting illuminance requirements in a typical office space. The solutions include dimming LED lamps, optimizing LED functionality, and reducing daylight intensity through shading windows. By implementing different optimization algorithms, the proposed optimization problems can be solved to achieve minimal energy consumption and user satisfaction.
Article
Political Science
Carl Dahlstrom, Mihaly Fazekas, David E. Lewis
Summary: The U.S. federal government's purchasing behavior shows favoritism, especially in more politicized executive departments, which can have electoral impacts. Politically responsive agencies tend to sign noncompetitive contracts more frequently in battleground states, and there is greater turnover in firms receiving government contracts after a party change in the White House, particularly in more politicized agencies. Limiting appointee representation in procurement decisions can reduce political favoritism.
AMERICAN JOURNAL OF POLITICAL SCIENCE
(2021)
Article
Public Administration
Ana-Maria Dimand, Andrea S. Patrucco, Evelyn Rodriguez-Plesa, Andra M. Hiriscau
Summary: This study examines the factors that can promote the participation of small disadvantaged business enterprises (SDBEs) in government contracts during emergency situations and whether these factors differ for strategic and non-strategic contracts. The results show that governments do not need to reduce competition to support SDBE participation, as some of these suppliers can win competitive procedures. Although non-SDBE suppliers are still more likely to be awarded contracts during emergencies, SDBE suppliers have a higher chance of winning procedures for strategic and important supplies.
PUBLIC ADMINISTRATION REVIEW
(2023)
Article
Thermodynamics
M. Davidovic, M. Kostic
Summary: This paper presents a correct methodology for determining the actual energy efficiency and cost indicators in street/road lighting. Through analyzing optimal lighting solutions and considering mesopic effects, LED lighting solutions were found to achieve higher energy savings and lower total costs compared to HPS lighting solutions.
Article
Horticulture
Thi Kim Loan Nguyen, Kye Man Cho, Hee-Yul Lee, Han-Sol Sim, Jin-Ha Kim, Ki-Ho Son
Summary: Supplemental light sources, specifically full-spectrum LED lights with shorter blue and/or green peak wavelengths, were found to enhance the growth and fruit yield of cherry tomatoes in this study. Additionally, supplemental light increased the electron transport rate and non-photochemical quenching.
Article
Computer Science, Artificial Intelligence
Cristovao Sousa, Daniel Teixeira, Davide Carneiro, Diogo Nunes, Paulo Novais
Summary: This paper investigates how to provide autonomous decision support for managing a public street lighting network, without data and explicit domain assertions, through a holistic methodology that combines semantic and AI principles.
INTEGRATED COMPUTER-AIDED ENGINEERING
(2022)
Article
Economics
Friedemann Polzin, Mark Sanders
Article
Environmental Sciences
Friedemann Polzin, Mark Sanders, Bjarne Steffen, Florian Egli, Tobias S. Schmidt, Panagiotis Karkatsoulis, Panagiotis Fragkos, Leonidas Paroussos
Summary: The cost of capital varies significantly across EU countries and energy technologies, affecting the technology mix, deployment, carbon emissions, and electricity system costs. By differentiating these costs in energy models, policymakers can better engineer an effective and efficient energy transition.
Article
Environmental Sciences
Helen Toxopeus, Friedemann Polzin
Summary: Through a review of academic literature, we have identified the main barriers to financing urban NBS as coordination between private and public financiers and the integration of NBS benefits into valuation and accounting methods. Strategies to address these barriers include developing comprehensive valuation frameworks and encouraging beneficiaries to provide co-financing.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Economics
Friedemann Polzin, Mark Sanders, Alexandra Serebriakova
Summary: Numerous studies have provided scenarios on energy transition, but lack information on financing. An appropriate financing mix should be calculated based on investment projections according to different technology assumptions. Major commitments to wind and solar energy require asset finance from institutional investors.
Article
Energy & Fuels
Alexandra Schneiders, Michael J. Fell, Colin Nolden
Summary: This paper discusses the potential and implications of P2P electricity trading in the energy sector, and raises considerations in terms of social, market design, and regulatory aspects. To achieve societal benefits and avoid risks, it suggests a policy approach promoting innovation and dialogue, with the regulatory sandbox as a suitable tool.
ENERGY SOURCES PART B-ECONOMICS PLANNING AND POLICY
(2022)
Article
Environmental Sciences
Florian Egli, Friedemann Polzin, Mark Sanders, Tobias Schmidt, Alexandra Serebriakova, Bjarne Steffen
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Engineering, Environmental
Michele Stua, Colin Nolden, Michael Coulon
Summary: Recent times have seen more countries and private firms pledging carbon neutrality, but these pledges lack substance and structure. This paper proposes a governance innovation to overcome these issues by providing a unified yet customizable pathway towards carbon neutrality.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Environmental Sciences
Olivier Berthod, Thomas Blanchet, Henner Busch, Conrad Kunze, Colin Nolden, Michelle Wenderlich
Summary: A wide range of actors are involved in the movement to democratize energy systems, but many energy democracy concepts are diluted or abandoned in the collaborative governance process of energy system transitions. Case studies reveal that actors championing energy democracy principles have a significant role in the early stages of collaborative energy transition governance, but as the process progresses, participation tends to be restricted. Institutional embedding of participative facilitation and consensus building is necessary to maintain energy democracy principles.
ENVIRONMENTAL MANAGEMENT
(2023)
Review
Environmental Sciences
Mark Sanders, Alexandra Serebriakova, Panagiotis Fragkos, Friedemann Polzin, Florian Egli, Bjarne Steffen
Summary: As the energy transition accelerates and renewable energy technologies become cost-competitive with fossil fuels in many countries, the availability of finance could become a bottleneck. However, current macro-economic models lack detailed consideration of financial markets and the impact of financing barriers and policy interventions on the energy transition.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Review
Green & Sustainable Science & Technology
Colin Nolden, Lee Towers, Daniela Schamroth Rossade, Peter Thomas, Giovanna Speciale, Richard Watson
Summary: This paper explores the tensions between decarbonisation and energy poverty priorities in the liberalised electricity markets of Great Britain. It highlights the lack of capabilities among energy poor individuals to switch electricity suppliers and access benefits, as well as the increasing eligibility for one-off discounts on electricity bills. The study suggests that climate mitigation policies and market structures tend to benefit wealthier groups at the expense of more deprived groups who lack capabilities. It emphasizes the importance of data access and intermediation at various levels to support targeted interventions and calls for safety nets and supportive institutional arrangements to ensure equity in liberalised retail electricity markets.
Article
Economics
Euan Gillham, Colin Nolden, Nicholas Banks, Bryony Parrish, Tedd Moya Mose, Katherine Sugar
Summary: This paper develops, tests, and applies an analytical framework to clarify the energy service concept, assess its suitability in Smart Local Energy Systems (SLES), and facilitate value creation in the transition to net zero. The framework highlights the importance of integrating material-centric and data-centric activities for a successful energy service concept in the residential sector.
Article
Environmental Sciences
Catalina-Alexandra Papari, Helen Toxopeus, Friedemann Polzin, Harriet Bulkeley, Eloisa Vittoria Menguzzo
Summary: The EU Taxonomy has the potential to support urban nature-based solutions (UNBS) by legitimizing them as climate investments, but it may overlook innovative urban UNBS types and fail to incentivize investments with multiple sustainable objectives. Public actors may leverage the ET to attract private funding for UNBS through bond issuance and co-finance instruments.
ENVIRONMENTAL SCIENCE & POLICY
(2024)
Review
Business, Finance
Colin Nolden
Summary: This paper reviews the value assigned to carbon emission mitigations or energy demand reductions through governance arrangements and organizational innovations. It explores the effective governance of financial mechanisms to create demand and the ability of organizations to assetize and supply these mitigations and reductions as private goods. Transaction cost economics is used to analyze the political and organizational governance of demand and supply systems. The innovative governance of markets at national and international levels reduces transaction costs, enabling the assetization of reductions and mitigations.
Article
Business
Helen Toxopeus, Elisa Achterberg, Friedemann Polzin
Summary: Access to bank finance is a key challenge for firms engaged in circular business model innovation. Strategies such as securing customer contracts, building relationships, and designing standardized assets can help firms obtain bank finance for circular BMI.
BUSINESS STRATEGY AND THE ENVIRONMENT
(2021)
Review
Business
Wanxiang Cai, Friedemann Polzin, Erik Stam
Summary: Literature reviews categorize crowdfunding research into different perspectives, but theory development remains limited. The social capital lens offers a promising approach for understanding crowdfunding, with most studies showing a positive and dynamic impact of social capital on crowdfunding activities. Further research directions include analyzing negative aspects and causal effects of social capital.
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2021)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
