Contradictory relationship between efficiency and renewable energy under breakeven point: Optimal selection of electrical and electronic equipment

Keita Hamasuna , Shoki Kosai , Shunsuke Kashiwakura , Eiji Yamasue
{"title":"Contradictory relationship between efficiency and renewable energy under breakeven point: Optimal selection of electrical and electronic equipment","authors":"Keita Hamasuna ,&nbsp;Shoki Kosai ,&nbsp;Shunsuke Kashiwakura ,&nbsp;Eiji Yamasue","doi":"10.1016/j.cles.2023.100103","DOIUrl":null,"url":null,"abstract":"<div><p>The increasing demand for electrical and electronic equipment (EEE), particularly air conditioning (ACs), has caused a significant increase in energy demand. Improvements in energy efficiency increase material and carbon footprints under the production stage owing to the additional use of resources. Higher energy-efficiency models need to compensate for this rise before EEE reaches the end of its lifespan. Thus, the timing of offsetting, named breakeven point (BEP), was analyzed between two models of ACs manufactured in Japan with different energy efficiencies in this study, considering material and carbon footprints based on different lifestyles. Through the analysis, a contradictory relationship between energy efficiency and renewable energy was quantitatively identified; that is, the improvement of energy efficiency leads to a lower BEP, while the increase in renewable energy leads to a higher BEP. When the share of renewable energy in the energy mix reaches more than 40 % in the case of material footprint, the choice of low-efficiency appliances would be even preferable considering the lifespan of EEE and lifestyle. The developed concept contributes to optimal selection among different EEE efficiency from an environmental perspective.</p></div>","PeriodicalId":100252,"journal":{"name":"Cleaner Energy Systems","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772783123000535/pdfft?md5=6c807e29ed90df011220f998c80c6752&pid=1-s2.0-S2772783123000535-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cleaner Energy Systems","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772783123000535","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The increasing demand for electrical and electronic equipment (EEE), particularly air conditioning (ACs), has caused a significant increase in energy demand. Improvements in energy efficiency increase material and carbon footprints under the production stage owing to the additional use of resources. Higher energy-efficiency models need to compensate for this rise before EEE reaches the end of its lifespan. Thus, the timing of offsetting, named breakeven point (BEP), was analyzed between two models of ACs manufactured in Japan with different energy efficiencies in this study, considering material and carbon footprints based on different lifestyles. Through the analysis, a contradictory relationship between energy efficiency and renewable energy was quantitatively identified; that is, the improvement of energy efficiency leads to a lower BEP, while the increase in renewable energy leads to a higher BEP. When the share of renewable energy in the energy mix reaches more than 40 % in the case of material footprint, the choice of low-efficiency appliances would be even preferable considering the lifespan of EEE and lifestyle. The developed concept contributes to optimal selection among different EEE efficiency from an environmental perspective.

盈亏平衡点下效率与可再生能源之间的矛盾关系:电气和电子设备的最佳选择
对电气和电子设备(EEE),特别是空调(AC)的需求不断增长,导致能源需求大幅增加。由于资源的额外使用,能效的提高增加了生产阶段的材料和碳足迹。能效更高的机型需要在电子电器设备的使用寿命结束之前弥补这种增加。因此,在本研究中,考虑到基于不同生活方式的材料和碳足迹,分析了日本生产的两种不同能效的空调型号之间的抵消时机,即盈亏平衡点(BEP)。通过分析,从数量上确定了能源效率和可再生能源之间的矛盾关系;即能源效率的提高导致 BEP 降低,而可再生能源的增加导致 BEP 提高。如果可再生能源在能源组合中的比例达到 40% 以上,考虑到能源和电子设备的寿命以及生活方式,选择低效率的设备甚至更可取。所开发的概念有助于从环境角度对不同能源和电子设备效率进行优化选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
3.00
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信