ChemRN: Energy Systems (Topic)最新文献_第2页

Energy Efficient Communication in Mobile Sensor Networks Based on Clusters 基于聚类的移动传感器网络节能通信

ChemRN: Energy Systems (Topic) Pub Date : 2019-01-11 DOI: 10.2139/ssrn.3353647

D. A

引用次数: 0

New About the Balancing of Thermal Motors 热电机平衡新进展

ChemRN: Energy Systems (Topic) Pub Date : 2019-01-01 DOI: 10.2139/ssrn.3445153

N. Petrescu, F. Petrescu

引用次数: 4

Customers Satisfaction Towards LPG in House Hold in Thoothukudi City Thoothukudi市户用液化石油气客户满意度

ChemRN: Energy Systems (Topic) Pub Date : 2018-12-12 DOI: 10.2139/ssrn.3299650

D. Amutha

{"title":"Customers Satisfaction Towards LPG in House Hold in Thoothukudi City","authors":"D. Amutha","doi":"10.2139/ssrn.3299650","DOIUrl":"https://doi.org/10.2139/ssrn.3299650","url":null,"abstract":"This paper presents the socio-economic status and customer’s satisfaction towards LPG in house hold in Thoothukudi city of Tamilnadu. \u0000 \u0000The objectives of the present study are: \u0000 \u00001. To study the socio-economic structure of LPG consumers in Thoothukudi city. \u0000 \u00002. To identify customer’s satisfaction towards LPG in households. \u0000 \u00003. To analyse awareness about gas subsidy. \u0000 \u00004. To find out approximate fuel expense per month. \u0000 \u00005. To identify the reasons for gas leakage. \u0000 \u0000It has been observed that approximate days of a gas cylinder to household sector. 49% of the respondents cooking 15-20 days, 27% of the respondents cooking 20-25 days, 17% of the respondents cooking 25-30% days, 5% of the respondents cooking Above 30 days. It is found that 79% of the respondents are aware of gas subsidy and still 21% of the respondents are not aware of gas subsidy. The study displays that 55% of the respondent’s expenses for cooking fuel are less than Rs.1000, 38% of the respondent’s expenses for LPG are Rs.1000-1500 and 7% of the respondent’s expenses are above Rs.1500 per month. 78% of the respondent’s opinion is easy in registration of cylinders. 22% of the respondents said they are not satisfied. Out of 180 respondents 54% of the households fitting regulator improper, 35% of the household’s gas leakage problem is due to long duration of tube, 11% of the household’s negligence of gas leakage. The mean monthly family income of the households works out to be Rs.11,700. In order to find out the significant difference in satisfaction of LPG among the sample respondents based on sex, the ‘t’ value was calculated and the calculated ‘t’ value was found to be 0.5351 which is lower than the table value 1.97 which is significant at 0.05 level. Therefore, the null hypothesis is accepted and concluded that there is no significant difference in satisfaction of LPG among the respondents between sexes.","PeriodicalId":340262,"journal":{"name":"ChemRN: Energy Systems (Topic)","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134479114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine Learning Forecasts of Public Transport Demand: A Comparative Analysis of Supervised Algorithms Using Smart Card Data 公共交通需求的机器学习预测:使用智能卡数据的监督算法的比较分析

ChemRN: Energy Systems (Topic) Pub Date : 2018-04-19 DOI: 10.2139/ssrn.3165303

Sebastián M. Palacio

引用次数: 4

Automobile Industry: Past, Present and Future 汽车工业:过去、现在和未来

ChemRN: Energy Systems (Topic) Pub Date : 2018-02-13 DOI: 10.2139/ssrn.3150440

Ashwin Showi

引用次数: 0

Enhanced Representations of Lithium-Ion Batteries in Power Systems Models and Their Effect on the Valuation of Energy Arbitrage Applications 锂离子电池在电力系统模型中的增强表征及其对能源套利应用估值的影响

ChemRN: Energy Systems (Topic) Pub Date : 2016-11-12 DOI: 10.2139/ssrn.2868414

Apurba Sakti, K. Gallagher, N. Sepulveda, C. Uckun, Claudio R. Vergara, F. D. de Sisternes, D. Dees, A. Botterud

{"title":"Enhanced Representations of Lithium-Ion Batteries in Power Systems Models and Their Effect on the Valuation of Energy Arbitrage Applications","authors":"Apurba Sakti, K. Gallagher, N. Sepulveda, C. Uckun, Claudio R. Vergara, F. D. de Sisternes, D. Dees, A. Botterud","doi":"10.2139/ssrn.2868414","DOIUrl":"https://doi.org/10.2139/ssrn.2868414","url":null,"abstract":"Abstract We develop three novel enhanced mixed integer-linear representations of the power limit of the battery and its efficiency as a function of the charge and discharge power and the state of charge of the battery, which can be directly implemented in large-scale power systems models and solved with commercial optimization solvers. Using these battery representations, we conduct a techno-economic analysis of the performance of a 10 MWh lithium-ion battery system testing the effect of a 5-min vs. a 60-min price signal on profits using real time prices from a selected node in the MISO electricity market. Results show that models of lithium-ion batteries where the power limits and efficiency are held constant overestimate profits by 10% compared to those obtained from an enhanced representation that more closely matches the real behavior of the battery. When the battery system is exposed to a 5-min price signal, the energy arbitrage profitability improves by 60% compared to that from hourly price exposure. These results indicate that a more accurate representation of li-ion batteries as well as the market rules that govern the frequency of electricity prices can play a major role on the estimation of the value of battery technologies for power grid applications.","PeriodicalId":340262,"journal":{"name":"ChemRN: Energy Systems (Topic)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122059201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 61

Optimization of the Global Largest Ground Source Heat Pump System 全球最大地源热泵系统优化

ChemRN: Energy Systems (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3946175

Yaqian Ren, Yanlong Kong, Yonghui Huang, H. Shao, Z. Pang, Jichao He, Wei Yi, Bin He, Jiyang Wang

{"title":"Optimization of the Global Largest Ground Source Heat Pump System","authors":"Yaqian Ren, Yanlong Kong, Yonghui Huang, H. Shao, Z. Pang, Jichao He, Wei Yi, Bin He, Jiyang Wang","doi":"10.2139/ssrn.3946175","DOIUrl":"https://doi.org/10.2139/ssrn.3946175","url":null,"abstract":"Large-scale ground source heat pump systems (GSHPs) are increasingly used for space heating and cooling. In comparison to small-scale GSHPs, large GSHPs are often coupled with hundreds of borehole heat exchangers (BHE), which are more susceptible to significant ground temperature changes due to the intense thermal interactions between the BHE. In this study, we developed a new model to optimize the operation of large-scale GSHPs to mitigate the underground heat/cold accumulation. The Daxing Airport GSHP system, containing 10497 BHE, making it the largest GSHP system in the world, was selected as the target for performance optimization. Four key parameters were optimized, including the cooling/heating starting sequence, operation continuity, thermal load variability, and partition mode. Our results revealed that extreme cold accumulation mainly exists between the BHE arrays, rather than inside a single array. We recommend that spacing of adjacent BHE arrays should be greater. Meanwhile, an operational sequence of cooling, with intermittent operation and constant thermal load, is also suggested. In comparison, the partition mode only lowers the thermal anomaly inside the BHE array. Our findings imply that for large-scale GSHPs, the distance between BHE arrays is the most critical factor impacting performance, which differs from small-scale GSHPs.","PeriodicalId":340262,"journal":{"name":"ChemRN: Energy Systems (Topic)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128743655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Paradox of Mini-Grids: A Conflict between Business Viability and Customer Affordability 微型电网的悖论:商业可行性和客户负担能力之间的冲突

ChemRN: Energy Systems (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3934310

Venkata Bandi, Tiia Sahrakorpi, J. Paatero, R. Lahdelma

{"title":"The Paradox of Mini-Grids: A Conflict between Business Viability and Customer Affordability","authors":"Venkata Bandi, Tiia Sahrakorpi, J. Paatero, R. Lahdelma","doi":"10.2139/ssrn.3934310","DOIUrl":"https://doi.org/10.2139/ssrn.3934310","url":null,"abstract":"Mini-grids are growing in popularity as a viable solution to energy poverty in rural, hard to reach areas consisting of Bottom-of-the-Pyramid (BoP) markets. Social enterprises are starting to play a vital role in providing services to this neglected customer group but often face difficulties resulting from rural market imperfections. In this study, we aim to address the following research question: how and to what extent can a mini-grid based social enterprise resolve the technical and organisational challenges associated with providing services in a rural BoP environment? Using Husk Power Systems (HPS) as a case study, our interdisciplinary approach navigates the landscape between social entrepreneurship and socio-technical aspects of mini-grid operations in the rural BoP market. The case study is based on interview evidence with ten HPS employees, three founders and 22 user interviews. We make use of narrative analysis to analyse the interview material. The paper argues that continuous conflicts exist between social and commercial objectives concerning mini-grid operations in the rural BoP markets. As this case study reveals, social enterprises need to manage the socio-technical challenges inherent to mini-grid processes; otherwise, customer affordability and business viability become an unsolvable paradox.","PeriodicalId":340262,"journal":{"name":"ChemRN: Energy Systems (Topic)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131088224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0