Energy Efficiency最新文献_第2页

Performance of solar cooker with evacuated tubes and photovoltaic panels with phase change materials 真空管太阳能炊具和相变材料光伏板的性能

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-08-23 DOI: 10.1007/s12053-023-10151-3

A. Simon Prabu, V. Chithambaram, M. Anto Bennet, S. Shanmugan, B. Janarthanan

{"title":"Performance of solar cooker with evacuated tubes and photovoltaic panels with phase change materials","authors":"A. Simon Prabu, V. Chithambaram, M. Anto Bennet, S. Shanmugan, B. Janarthanan","doi":"10.1007/s12053-023-10151-3","DOIUrl":"10.1007/s12053-023-10151-3","url":null,"abstract":"<div><p>Solar cooker has its own significance with an impact of substituting conventional source of energy for cooking. Solar cookers with electrical backup have proven the usage in off-sunshine hours to some extent. A cheaper and competitive PV and evacuated tube–based solar cooker with a control unit with incorporation of phase change material for energy storage were utilized without any interruption during off-sunshine hours for effective cooking. The proposed system has a control circuit connecting solar PV, DC output storage device (Battery 12V 75 AH), and DC-linked Nichrome heating coil. Three phase change materials, viz., palm oil, coconut oil, and paraffin wax, have been used in the system to extract and use the energy stored during sunshine hours in the materials. Figure of merit (F<sub>1</sub>) and figure of merit (F<sub>2</sub>) values for the system with the phase change materials have been found by doing experiments to find stagnation temperature without load and with load. The values of F<sub>1</sub> (0.139) and F<sub>2</sub> (0.42) for coconut oil are found to be effective with an energy efficiency of 38% compared to the other materials in the study with electrical backup.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 7","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4888659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel technology-explicit framework for predicting the efficiency of industrial device retrofits in stock turnover models with a case study of the pulp and paper sector 在库存周转模型中预测工业设备改造效率的新技术明确框架与纸浆和造纸部门的案例研究

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-08-22 DOI: 10.1007/s12053-023-10150-4

Christophe G. Owttrim, Matthew Davis, Amit Kumar

{"title":"A novel technology-explicit framework for predicting the efficiency of industrial device retrofits in stock turnover models with a case study of the pulp and paper sector","authors":"Christophe G. Owttrim, Matthew Davis, Amit Kumar","doi":"10.1007/s12053-023-10150-4","DOIUrl":"10.1007/s12053-023-10150-4","url":null,"abstract":"<div><p>When replacing equipment at its end of life, industries often have the option to select higher efficiency technologies. The choice to invest in an improved piece of equipment rather than a simple in-kind replacement is driven by many factors, including costs, performance, and familiarity with new technology options. Engineering models that account for equipment stock turnover, such as ENERGY 2020, typically assume that this decision is primarily driven by the difference in marginal costs: higher up front capital costs must be, at minimum, balanced by lower lifetime energy costs for an upgrade to be pursued. Stock turnover analysis requires detailed data inputs regarding the costs and performance of new equipment. For simplicity, a common approach is to develop assumed correlations that reflect the trade-off between marginal capital cost and efficiency and compare these to energy prices to select an efficiency level for new equipment. In this study, we present a novel method to develop such trade-off curves based on a technology-explicit approach rather than a qualitative correlation assumption. We generate trade-off curves for two common types of industrial devices: electric machine drive and natural gas steam generation for the case study of the Canadian pulp and paper sector. The curves demonstrate that the efficiency of new devices can be expected to vary significantly based on energy prices. At current energy prices, we find that newly purchased machine drive and steam generation devices would have an optimal efficiency level of 91% and 75%, respectively.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 7","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12053-023-10150-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4848927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of powers outages on the technical efficiency of manufacturing firms in Cameroon: the role of a firm's status, formal or informal 停电对喀麦隆制造业企业技术效率的影响:企业地位的作用，正式或非正式

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-08-11 DOI: 10.1007/s12053-023-10152-2

Fabrice Nzepang, Carlos Rigobert Ewane Nkoumba, Saint Dannick Kouekeu

{"title":"Impact of powers outages on the technical efficiency of manufacturing firms in Cameroon: the role of a firm's status, formal or informal","authors":"Fabrice Nzepang, Carlos Rigobert Ewane Nkoumba, Saint Dannick Kouekeu","doi":"10.1007/s12053-023-10152-2","DOIUrl":"10.1007/s12053-023-10152-2","url":null,"abstract":"<div><p>The objective of this paper is to measure the impact of powers outages on the technical efficiency of manufacturing firms in Cameroon, focusing on the role of informality status. Indeed, informal firms are mostly very small and generally use less energy than formal firms and do not need sophisticated and costly electrical equipment for their operation. We mobilize data from the Enterprises Survey conducted in Cameroon in 2009 and 2016 by the World Bank. We first apply the data envelopment method (DEA) to determine the technical efficiency scores of firms. We estimate average efficiency scores of 25% and 42% for 2009 and 2016 respectively, which represents an improvement over the period. We then assess the impact of powers outages and other exogenous factors on the efficiency scores using the Tobit model as the efficiency scores are between 0 and 1. The results show that the occurrence of powers outages, the number of powers outages events, the duration of a powers outages event, the total cost of electricity and the losses due to powers outages negatively and significantly affect the efficiency scores of manufacturing firms in Cameroon in 2009 and 2016. However, informal firms are more resilient to powers outages than formal firms. Furthermore, sensitivity analyses using quantile regression confirm the robustness of our estimates. These results call, first, for improving the quality of private and public electricity infrastructure in order to reduce the occurrence of powers outages. Secondly, these results suggest the development of substitutes to electric energy to cope with long periods of powers outages.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 6","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44439473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Urban building energy modeling (UBEM): a systematic review of challenges and opportunities 城市建筑能源建模(UBEM):挑战与机遇的系统回顾

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-08-04 DOI: 10.1007/s12053-023-10147-z

Dezhou Kong, Ali Cheshmehzangi, Zhiang Zhang, Saeid Pourroostaei Ardakani, Tingyue Gu

{"title":"Urban building energy modeling (UBEM): a systematic review of challenges and opportunities","authors":"Dezhou Kong, Ali Cheshmehzangi, Zhiang Zhang, Saeid Pourroostaei Ardakani, Tingyue Gu","doi":"10.1007/s12053-023-10147-z","DOIUrl":"10.1007/s12053-023-10147-z","url":null,"abstract":"<div><p>In recent decades, urban energy consumption and carbon emissions have expanded rapidly on a global scale. Building sector, in particular, accounts for approximately 40% of overall energy use. Urban planners and decision-makers have a significant responsibility to achieve sustainable energy and climate objectives. Urban building energy modeling (UBEM) has increased in popularity in recent years as a tool for calculating urban-scale energy use in buildings with limited resources, and that facilitated the formulation of new energy policies. However, published studies of UBEM methodologies and tools lack comprehensive examinations of the potential limitations of research and the prospects of future opportunities. This paper provides a complete conceptual framework for UBEM based on extensive literature reviews and prior researchers’ work. In addition to providing a comprehensive understanding of the various UBEM approaches and tools, future research directions are explored. The results demonstrate that earlier researches did not adequately account for input uncertainty and lacked proper simulation and calibration control for algorithms/models. These challenges not only increased the workload and computational burden of modelers but also diminished the precision of model calculations. In response, this paper provides targeted recommendations for each essential phase of the present UBEM workflow, namely model input, model development, and model calibration, to address these limitations, as well as a comprehensive analysis of future prospects. The main aim of the research is to further UBEM development as a faster, more accurate and multiscale supportive tool and establish a framework for future UBEM methods.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 6","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44379491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flux optimization strategy for efficiency enhancement of induction motor–driven electric vehicle under dynamic operating conditions 感应电机驱动电动汽车动态工况下提高效率的磁通优化策略

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-07-28 DOI: 10.1007/s12053-023-10149-x

Manish Kumar, Bhavnesh Kumar, Asha Rani

引用次数: 0

Russian energy balance, energy efficiency, and energy-related GHG emission accounting system 俄罗斯能源平衡，能源效率，以及与能源相关的温室气体排放核算系统

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-07-26 DOI: 10.1007/s12053-023-10132-6

Igor Bashmakov, Anna Myshak, Vladimir A. Bashmakov, Vladmir I. Bashmakov, Konstantin Borisov, Maxim Dzedzichek, Alexey Lunin, Oleg Lebedev, Tatiana Shishkina

{"title":"Russian energy balance, energy efficiency, and energy-related GHG emission accounting system","authors":"Igor Bashmakov, Anna Myshak, Vladimir A. Bashmakov, Vladmir I. Bashmakov, Konstantin Borisov, Maxim Dzedzichek, Alexey Lunin, Oleg Lebedev, Tatiana Shishkina","doi":"10.1007/s12053-023-10132-6","DOIUrl":"10.1007/s12053-023-10132-6","url":null,"abstract":"<div><p>This paper presents a newly developed Russian energy efficiency and energy-related GHG emission accounting system (EE-EGHG-AS) and discusses the results obtained. This system is designed to account for the energy efficiency progress as achieved in 12 sectors and 80 economic activities and to capture the impacts of 7 factors with a focus on the technological factor. It helped to reveal that in 2015–2021, the technological factor contributed to the 4.3% decline in GDP energy intensity (whereas the traditionally estimated GDP energy intensity was 3.6% up). If non-energy use is excluded, then energy intensity was 2.8% down, which brings the 2021 energy intensity level 15% below the traditional estimates. For some activities, the EE-EGHG-AS has demonstrated a limited ability to adequately assess the contribution made by the technological factor to crashing into, and recovering from, COVID-19-like crises, because the statistically reported data is scarce. With little progress towards energy efficiency improvements Russia is still one of the most energy-intensive countries in the world. Little progress in energy efficiency over the recent years has created the “super-coupling” effect for Russia in 2020–2021 and it is extremely challenging to attain the country’s carbon neutrality target by 2060.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 6","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44186942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Human-centered determinants of price and incentive-based residential demand response in Ottawa, Canada 以人为中心的价格决定因素和加拿大渥太华基于激励的住宅需求反应

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-07-24 DOI: 10.1007/s12053-023-10135-3

Nikolaos Iliopoulos, Motoharu Onuki, Miguel Esteban, Ioan Nistor

{"title":"Human-centered determinants of price and incentive-based residential demand response in Ottawa, Canada","authors":"Nikolaos Iliopoulos, Motoharu Onuki, Miguel Esteban, Ioan Nistor","doi":"10.1007/s12053-023-10135-3","DOIUrl":"10.1007/s12053-023-10135-3","url":null,"abstract":"<div><p>Considerable evidence suggests that residential demand response enables demand-side flexibility, lowering average electric procurement costs and minimizing greenhouse gas emissions associated with the operation of peak power plants. However, the effectiveness of such demand management is contingent on behavioral interventions that attenuate energy saving at the residential level, highlighting the need to better understand the human dimension of residential electricity curtailment. This study examines the influence of interpersonal, socio-economic characteristics and environmental awareness of households in Ottawa on their willingness to participate in demand response programs. Time of use, real-time pricing, critical peak pricing, and direct load control were considered potential candidates for adoption. Furthermore, the authors propose and investigate the willingness of people to receive non-electricity-related information on their in-home displays and participate in an altruistic peer-to-peer energy platform that was conceptualized and designed by the authors. The results suggest that the corporate social and environmental responsibility of electricity providers and the environmental awareness of respondents, as well as their perceived level of indoor comfort, all influence the effectiveness of demand response. The findings also indicate that philanthropic-oriented and information-driven incentives can potentially increase energy curtailment amongst households with a high prosocial responsibility.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 6","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47227046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rebound effects of energy efficiency improvement based on computable general equilibrium models: a systematic review 基于可计算一般均衡模型的能源效率提高的反弹效应：系统综述

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-07-22 DOI: 10.1007/s12053-023-10148-y

Weiwei Huang, Jianxu Miao, Taoyuan Wei

{"title":"Rebound effects of energy efficiency improvement based on computable general equilibrium models: a systematic review","authors":"Weiwei Huang, Jianxu Miao, Taoyuan Wei","doi":"10.1007/s12053-023-10148-y","DOIUrl":"10.1007/s12053-023-10148-y","url":null,"abstract":"<div><p>Energy efficiency improvement is expected to reduce energy consumption. However, actual energy savings can be lower than anticipated, called rebound effects. This article reviews previous studies that have used computable general equilibrium (CGE) models to study the rebound effects caused by energy efficiency improvements in the recent two decades until 2021. A systematic review approach has been adopted to select the focused studies, and keywords co-occurrence analysis has been used to explore the characteristics of the selected studies. We reported our findings on specific aspects of these CGE studies, including geographic location, time scale, and methodological features; how an energy efficiency improvement is introduced; and the levels of rebound effects estimated by these studies. These findings suggest specific potential research gaps. For example, few CGE studies have focused on Russia, India, and Africa; no production functional forms other than constant elasticity of substitution (CES) have been used in these CGE studies; and little attention has been paid to negative rebound effects in the short run and the cases of joint implementation of energy efficiency improvement and other policy measures that drive energy cost higher.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 6","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44428507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inclusivity between internet development and energy conservation in Henan, China 中国河南互联网发展与节能的包容性

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-07-22 DOI: 10.1007/s12053-023-10144-2

Meng Yang, Hujun Li, Fangzhao Deng, Qinchen Yang, Ning Ba, Yunxia Guo, Haitao Wu, Muhammad Irfan, Yu Hao

引用次数: 1

Energy efficiency and China’s carbon emissions: evidence from non-parametric approaches 能源效率与中国碳排放:来自非参数方法的证据

IF 3.1 4区工程技术

Energy Efficiency Pub Date : 2023-07-21 DOI: 10.1007/s12053-023-10142-4

Rong Zhou, Li Zheng, Liu Li, Najaf Iqbal, Zeeshan Fareed

{"title":"Energy efficiency and China’s carbon emissions: evidence from non-parametric approaches","authors":"Rong Zhou, Li Zheng, Liu Li, Najaf Iqbal, Zeeshan Fareed","doi":"10.1007/s12053-023-10142-4","DOIUrl":"10.1007/s12053-023-10142-4","url":null,"abstract":"<div><p>In the recent times, the issue of excessive carbon emission is a hot topic among the scholars and governors. In this context, it is necessary to examine the factors affecting the emissions level, particularly in emerging economy like China. Using the extended period from 1990 to 2021, this study analyzes the impact of energy efficiency, economic growth, and renewable energy along with the testing of environmental Kuznets curve (EKC) paradox. The empirical results validate the cointegration between the mentioned variables. Employing the novel non-parametric approaches, this study found the existence of the EKC hypothesis in the country as the economic growth initially increases environmental challenges, while reducing it after reaching a specific income level. On the other hand, energy efficiency and renewable energy consumption are found to be significant tools for improving environmental sustainability and reducing of carbon emissions. The robustness of the results is confirmed by the non-parametric (bootstrap quantile regression) and parametric (fully modified ordinary least square) approaches. Based on the outcomes, this study also revealed policy implications for the scholars and governors.</p></div>","PeriodicalId":537,"journal":{"name":"Energy Efficiency","volume":"16 6","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4824315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3