Energy Sources最新文献_第4页

Processing of Residues from Power Generation into Sintered Aggregate: Process Requirements 发电残渣烧结骨料的加工:工艺要求

Energy Sources Pub Date : 2005-10-01 DOI: 10.1080/009083190523262

M. Nabożny, J. Nocoń, Z. Woźniacki, J. Pasierb

引用次数: 1

Biomass Co-Firing for Boilers Associated with Environmental Impacts 与环境影响相关的生物质共烧锅炉

Energy Sources Pub Date : 2005-10-01 DOI: 10.1080/009083190523217

A. Demirbaş

{"title":"Biomass Co-Firing for Boilers Associated with Environmental Impacts","authors":"A. Demirbaş","doi":"10.1080/009083190523217","DOIUrl":"https://doi.org/10.1080/009083190523217","url":null,"abstract":"This article is presented to discuss general combustion and emissions issues with biomass co-firing, as well as specific issues with particular biomass fuels, such as fouling. The tests of co-firing were carried out in a lab-scale bubbling fluidized bed combustor. Biomass is an attractive and sustainable renewable fuel to supplement coal combustion in utility boilers. Coal and biomass fuels are quite different in composition. Ash composition for the biomass is fundamentally different from ash composition for coal. Chlorine in the biomass may affect operation by corrosion. Ash deposits reduce heat transfer and may also result in severe corrosion at high temperatures. Biomass and coal blend combustion is a promising combustion technology; however, significant development work is required before large-scale implementation can be realized. Coal co-firing was successful with up to a 20% biomass mix boilers. Issues related to successful implementation of coal biomass blend combustion are identified. Co-firing of coal and biomass is an effective method of control NO x . Formation of NO x decreases with the increase of biomass fraction. This study focuses on five of the critical fireside issues associated with co-firing: ash deposition, SO 2 emission, NO x formation, corrosion, and carbon burnout.","PeriodicalId":11841,"journal":{"name":"Energy Sources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78919678","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: 32

An Evaluation of a Batch Pilot-Scale Digester for Gas Production from Agricultural Wastes 间歇式中试农业废弃物产气消化池的评价

Energy Sources Pub Date : 2005-10-01 DOI: 10.1080/009083190519023

A. Anozie, S. K. Layokun, C. U. Okeke

{"title":"An Evaluation of a Batch Pilot-Scale Digester for Gas Production from Agricultural Wastes","authors":"A. Anozie, S. K. Layokun, C. U. Okeke","doi":"10.1080/009083190519023","DOIUrl":"https://doi.org/10.1080/009083190519023","url":null,"abstract":"A batch pilot-scale biogas reactor was fabricated using 3 mm mild steel. It was a horizontal, cylindrical digester measuring 58 cm (diameter) by 106 cm (length) of total volume 0.28 m 3 . This package facility was easy to install and operate, consisting of several components that can be assembled and put to use much like a do-it-yourself kit. During a forty-day anaerobic digestion of four types of agricultural wastes (poultry droppings, cow dung, corn stalk and mixed substrate), the biogas production from each waste was determined using the water displacement method via batch operation. 38.49 kg (wet weight) of substrate mixed with water in the ratio of 1:1 was used as feed. The results showed that the average daily gas production from poultry droppings, 137.16 liters, was the highest, while corn stalk produced the least, 16.38 liters. Laboratory analysis showed that the biogas produced contained 60% methane while carbon dioxide and other trace gases made up the balance of 40%. The gas produced burnt well in a Bunsen burner with a blue flame. The gas production was good and is a practical indicator of the performance of the digester. A maximum reactor pressure of 1.34 bars was recorded for a period of seven days of no gas harvest when poultry droppings were used as substrate, indicating that biogas production in a reactor is a relatively low-pressure operation.","PeriodicalId":11841,"journal":{"name":"Energy Sources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79931884","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: 30

Thermochemical Conversion of Biomass to Liquid Products in the Aqueous Medium 生物质在水介质中的热化学转化为液体产品

Energy Sources Pub Date : 2005-10-01 DOI: 10.1080/009083190519357

A. Demirbaş

引用次数: 80

Numerical Analyses on Contaminant Transport Using a Dual Reactive Domain Model 基于双反应域模型的污染物输运数值分析

Energy Sources Pub Date : 2005-09-01 DOI: 10.1080/009083190519285

D. Jeong, J. Choe

{"title":"Numerical Analyses on Contaminant Transport Using a Dual Reactive Domain Model","authors":"D. Jeong, J. Choe","doi":"10.1080/009083190519285","DOIUrl":"https://doi.org/10.1080/009083190519285","url":null,"abstract":"An advection-dispersion equation (ADE) describes contaminant transport in porous media. An ADE can cover equilibrium phenomena of interest, which includes sorption, decay, and chemical reactions. Among these phenomena, sorption mechanism is described by several types of sorption isotherm. If sorption isotherm is linear, the solution of the ADE can be easily obtained. However, if sorption isotherm is non-linear, like Langmuir model or non-linear Freundlich molel, the coefficients of resultant differential equation become non-linear. In this case, there is no analytic solution. Dual reactive domain model (DRDM) is a combined model of linear and Langmuir models, so it can cover linear and non-linear characteristics of sorption behavior. In this article, we present numerical analyses of ADE using a DRDM. The simulation results reveal that even if sorption data may be fitted well using linear or non-linear isotherms, the characteristics of contaminant transport by applying the two are quite different from each other. To be concrete, the retardation effect of linear isotherm is different from that of the DRDM. As the non-linearity of sorption isotherm increases, the difference of retardation effects of the two cases becomes large. Even if we use a DRDM to simulate contaminant transport, which shows a linear or non-linear sorption behavior, we can get pretty similar simulation results. Although the transport of contaminant is very sensitive to sorption models used, using a DRDM can reduce the uncertainty due to the selection of sorption model. Therefore, we recommend a DRDM as a sorption model to more accurately describe the transport of contaminant.","PeriodicalId":11841,"journal":{"name":"Energy Sources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88044915","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: 2

Reformulation, as a Function of Only Working Temperatures, of Performance Parameters of a Solar Driven Ejector-Absorption Cycle Using Artificial Neural Networks 利用人工神经网络对太阳能驱动的抛射-吸收循环的性能参数进行重构，使其仅作为工作温度的函数

Energy Sources Pub Date : 2005-09-01 DOI: 10.1080/00908310490479556

A. Sözen, M. Akcayol

{"title":"Reformulation, as a Function of Only Working Temperatures, of Performance Parameters of a Solar Driven Ejector-Absorption Cycle Using Artificial Neural Networks","authors":"A. Sözen, M. Akcayol","doi":"10.1080/00908310490479556","DOIUrl":"https://doi.org/10.1080/00908310490479556","url":null,"abstract":"Theoretical thermodynamic analysis of the absorption thermal systems is too complex because of analytic functions calculating the thermodynamic properties of fluid couples involving the solution of complex differential equations and simulations programs. This article proposes a new approach to performance analysis of solar driven ejector-absorption refrigeration system (EARS) operated aqua/ammonia. Use of artificial neural networks (ANNs) has been proposed to re-determine the performance parameters, as a function of only working temperatures, at different working conditions. Thus, this study is considered to be helpful in predicting the performance of an EARS prior to its setting up in an environment where the temperatures are known. The statistical coefficient of multiple determinations (R 2 -value) equals to 0.976, 0.9825, 0.9855 for the coefficient of performance (COP), exergetic coefficient of performance (ECOP) and circulation ratio (F), respectively. These accuracy degrees are acceptable in design of EARS. The present method greatly reduces the time required by design engineers to find optimum solution, and in many cases, reaches a solution that could not be easily obtained from simple modeling programs. The importance of the ANN approach, apart from reducing the whole time required, is that it is possible to find solutions that make solar energy applications more viable, and thus more attractive to potential users such as the solar engineer. Also, this approach has the advantages of computational speed, low cost for feasibility, and rapid turnaround, which is especially important during iterative design phases, and ease of design by operators with little technical experience.","PeriodicalId":11841,"journal":{"name":"Energy Sources","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91407246","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: 2

The Effect of Swelling Pretreatment on the Coal Liquefaction in Tetralin with Microwave Energy 膨胀预处理对四氢化萘微波能液化煤的影响

Energy Sources Pub Date : 2005-09-01 DOI: 10.1080/00908310490449289

N. E. Agun, Emine Yagmur, E. Simsek, T. Toḡrul

引用次数: 6

Laser Induced Photocatalytic Splitting of Water Over WO3 Catalyst 激光诱导光催化水在WO3催化剂上的分裂

Energy Sources Pub Date : 2005-09-01 DOI: 10.1080/00908310490479574

M. Gondal, A. Hameed, Z. Yamani

引用次数: 31

Removal of Heavy Metal Ions from Aqueous Solutions via Adsorption onto Modified Lignin from Pulping Wastes 改性木质素对制浆废渣中重金属离子的吸附研究

Energy Sources Pub Date : 2005-09-01 DOI: 10.1080/00908310490479583

A. Celi̇k, A. Demirbaş