Fuel Communications最新文献

{"title":"nOn the Use of Ammonia as a Fuel – A Perspective","authors":"O. Herbinet, P. Bartocci, A. G. Dana","doi":"10.1016/j.jfueco.2022.100064","DOIUrl":"https://doi.org/10.1016/j.jfueco.2022.100064","url":null,"abstract":"","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82124955","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}

{"title":"Performance improvement of R600a with graphene nanolubricant in a domestic refrigerator as a potential substitute for R134a","authors":"D. M Madyira ,&nbsp;T. O Babarinde ,&nbsp;P. M Mashinini","doi":"10.1016/j.jfueco.2021.100034","DOIUrl":"10.1016/j.jfueco.2021.100034","url":null,"abstract":"<div><p>The efficiency of R600a an eco-friendly refrigerant with graphene nanolubricant was investigated and compared in a domestic refrigerator with R134a refrigerant a zero Ozone Depleting Potential (ODP) but higher Global Warming Potential (GWP) refrigerant. Type K thermocouples were attached to the refrigerator components to track the temperature of the system. Two pressure gauges were also attached to the compressor to determine the pressure at suction and discharge of the domestic refrigerator. A digital wattmeter was used to measure the refrigerator's compressor power consumption. The results showed the evaporator air temperature and pull-down time of R600a with graphene nanolubricant were lower compared to R134a. A higher COP was achieved with R600a in graphene nanaolubricant with an increase in cooling capacity within the range of 5.2% to 14.2% and the power consumption reduced within the range of 8.8% to 26.4%. Hence, R600a/graphene nano lubricant can successfully replace R134a/POE oil in a domestic refrigerator system.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100034"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052021000273/pdfft?md5=18640a0807d59751df73dff371f6ab68&pid=1-s2.0-S2666052021000273-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88949991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three classes of Earliness-Tardiness (E/T) scheduling problems","authors":"Saheed Akande ,&nbsp;Ganiyu Ajisegiri","doi":"10.1016/j.jfueco.2021.100047","DOIUrl":"https://doi.org/10.1016/j.jfueco.2021.100047","url":null,"abstract":"<div><p>In this work, the tolerance window defined as the variations of gains and penalty associated with the earliness component of the Linear Composite Objective Function (LCOF) of Earliness–Tardiness (E/T) scheduling problems were explored to establish three different classes of the problem. Two variants of E/T problems has been established in the literature; the problems with unknown due-date with the objective of optimizing jobs due-date and the problems with a known due-date for optimizing the E/T cost function. The latter variant considered in this work applies the concept of Just-In-Time (JIT) as the basis for optimizing the E/T cost function. However, while the ideal JIT schedule which tends towards zero LCOF is notional, the deviation is a function of the tolerance window. To the best of the researchers’ knowledge, there is a gap between the measures of the deviation called the delivery reliability or penalty cost function and the tolerance window. This work closes the gap. A numerical example was solved to demonstrate the three problem classes’ utility using the Early Due Date (EDD) algorithm as the hypothetical solution.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100047"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052021000406/pdfft?md5=0a682584b8a0a1c7b5e8ae51e60cc748&pid=1-s2.0-S2666052021000406-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137292579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Friction factor effect and heat transfer enhancement in combined dimple geometry arrange in different angle to flow direction","authors":"S.A. Aasa ,&nbsp;A.S. Shote ,&nbsp;S.O. Giwa ,&nbsp;M. Sharifpur","doi":"10.1016/j.jfueco.2021.100043","DOIUrl":"10.1016/j.jfueco.2021.100043","url":null,"abstract":"<div><p>One of the most effective passive techniques for heat transfer enhancement in heat exchanger devices is the surface roughness flow augmentation model. In this study, the surface pressure and heat transfer are measured using experimental and computational methods in a rectangular channel. Three aspect ratios, AR, 0.05, 0.035, and 0.025, dimple channel with pitch to depth ratios, P/δ = 6 are tested in this study. The angled dimple surface comprises of two cases; case 1 0 °Circular - 45°Oval dimple (0 °C – 45°O) and Case2 45° Oval - 0° Circular dimple (45° O – 0 °C). The computational study is conducted for Reynolds number, Re 600–11000. The data from the compound-dimple channel is normalized with the smooth channel data of heat transfer and friction factor parameters. It is revealed that friction factors, f, friction factors ratio, f/f_o, average Nusselt number, Nu_avg, Nusselt number ratios, Nu/Nuo, are dependent on Re. The performance index on the compound dimple surface using the ratio of Nusselt numbers, Nu/Nu_o, to friction factors, f/f_o. The arrangement and location of the dimple have momentous consequences for the pressure drop parameters f and f/f_o. The surface pressure and temperature show that the flow is uniformly distributed in the channel. The performance index improves and Re has strong influence on it. The compound dimple geometry does indicate a strong model for application in heat exchanger devices. Optimum performance of 49% for case 1 and 23% for case 2 are observed.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100043"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052021000364/pdfft?md5=f402409ddcb8069148ec70401b3bf097&pid=1-s2.0-S2666052021000364-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74098388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Challenges in Kinetic modeling of ammonia pyrolysis","authors":"Peter Glarborg ,&nbsp;Hamid Hashemi ,&nbsp;Paul Marshall","doi":"10.1016/j.jfueco.2022.100049","DOIUrl":"10.1016/j.jfueco.2022.100049","url":null,"abstract":"<div><p>Ammonia pyrolysis reactions have implications for its ignition and oxidation in engines and gas turbines. In the present work, the chemistry of ammonia pyrolysis is investigated by kinetic modeling and theory. Rate constants for key reactions are carefully evaluated based on available experimental and theoretical results. The high pressure limit k<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>,</mo><mi>∞</mi></mrow></msub></math></span> for NH<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> + H (+M) <span><math><mo>⇄</mo></math></span> NH<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span> (+M) (R1) is calculated to be essentially the collision frequency, indicating that dissociation of ammonia in combustion processes will be at or close to the low pressure limit even at engine and gas turbine conditions. The chemical kinetic model is validated against reported shock tube measurements of NH<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span>, NH<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span>, and NH in ammonia pyrolysis. Predictions are in good agreement with observations for dilute conditions (<span><math><mo>≤</mo></math></span> 0.5% NH<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span>), but the model appears to underpredict the NH<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span> consumption rate at longer times in less dilute mixtures. At short reaction times, thermal dissociation of NH<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span>, together with the NH<span><math><msub><mrow></mrow><mn>3</mn></msub></math></span> + H reaction, controls conversion. At longer times, secondary reactions involving NH<span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> and NH become important due to their impact on the radical pool. Predictions become sensitive to formation and consumption of diazene (tHNNH and cHNNH). Several of the key steps in the ammonia pyrolysis mechanism are radical-radical reactions that are difficult to measure accurately and challenging to calculate theoretically, and a more comprehensive experimental characterization is desirable to support further model development.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100049"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052022000012/pdfft?md5=1bf58e01e9e2d05e0b059997705e4cf2&pid=1-s2.0-S2666052022000012-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86716150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Human health risk evaluation of sodium and ironic elements variability in ground water: A case study of Abuja North, Nigeria","authors":"Olugbenga Oludolapo Amu ,&nbsp;Eyitope Oluseyi Amu ,&nbsp;Ehizemhen Christopher Igibah ,&nbsp;Lucia Omolayo Agashua","doi":"10.1016/j.jfueco.2021.100041","DOIUrl":"https://doi.org/10.1016/j.jfueco.2021.100041","url":null,"abstract":"<div><p>Harmful substance tends to come into water bodies through geodesic and human-induced sources, therefore persistent drinking water monitoring schemes are crucial. The goal of this paper was to estimate the human health threat posed through high sodium and iron accumulation in borehole water used for both consumption and domestic activities. As this will help in the prevention of water-related sicknesses and maintenance of good health for human being that rely on water to survive. Specially, rural region need to be enlightened about biochemistry of the mineral elements ingested, since excessive intake of some minerals can upset homeostatic balance and cause toxic side effects. For instance, excess sodium ingestion ensuing from daily intake of saline origins is associated with high blood pressure, while excess iron intake can stimulate liver impairment or brain damage which connected to aging and protein-misfolding neurodegenerative ailments. More importantly, when an individual suffering from a chronic sickness take prescriptions with water of unknown quality as human being believes that groundwater possess safe water quality, the health situation becomes worst. In this paper, iron accumulation in borehole water varied at distinct sites, span between 0.01 mg/L and 2.95 mg/L with a mean value of 1.02 mg/L whereas that of sodium range from 55.98 mg/L to 515.45 mg/L with mean value of 260.19 mg/L. The Hierarchical cluster scrutiny revealed three common clusters wherein the samplings could be grouped. The non-carcinogenic threat was calculated and the Total Threat Index above 1.0 for sodium ingestion in the scrutinized sites was gotten from all locations.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100041"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052021000340/pdfft?md5=d93bf6623007da5754735058170bf6e7&pid=1-s2.0-S2666052021000340-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137292580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance charateristics of a conventional spark ignition petrol engine powered by biogas","authors":"Eseoghene Daniel Karakitie,&nbsp;Chisom Emmanuel Aralu,&nbsp;Abimbola David Fadare","doi":"10.1016/j.jfueco.2021.100032","DOIUrl":"10.1016/j.jfueco.2021.100032","url":null,"abstract":"<div><p>This research investigates the use of biogas to run a spark ignition petrol engine and test for the engine performance. Conventional spark ignition petrol engine was modified into a dual fuel engine by changing the engine single fuel carburettor to dual fuel carburettor. The air orifice was closed by 50% to enable cooled start with natural biogas as the low calorific value won't facilitate combustion. The speed, torque, and other engine parameters where measured using a TD200 small engine test set (hydraulic brake dynamometer) interface and emissions of SO₂, CO were measured using an emissions analyser. The torque, brake power was higher for petrol by 39% than the biogas due to the lower calorific value of biogas. The exhaust temperature, SO₂ and CO was 49% lower for the biogas than the petrol. The comparative analysis of the modified engine showed that petrol can be substituted partly with biogas and the engine used for varying applications because it offers window escape on the hydrocarbon reservoir depletion, green gasses emission from the use of these petrol and landfill emission as well.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100032"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266605202100025X/pdfft?md5=4cf78c4a1d6df8c0484ec32f027c943f&pid=1-s2.0-S266605202100025X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76733547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable energy for national climate change, food security and employment opportunities: Implications for Nigeria","authors":"Oluseyi O. Ajayi ,&nbsp;Geev Mokryani ,&nbsp;Bose M. Edun","doi":"10.1016/j.jfueco.2021.100045","DOIUrl":"10.1016/j.jfueco.2021.100045","url":null,"abstract":"<div><p>This paper looks into the issues around renewable energy with a view to identify the opportunities for Nigeria and critically review the nation's renewable energy policy vis-à-vis the efforts and achievement of governments and indigenous practitioners. It identified the inherent opportunities of renewable energy resources at ameliorating the incidents of climate change and global warming and also surveyed international statistics on the relationships between energy and renewable energy adoption, national development, population explosion, job creation and rural-urban integration. It found out that for Nigeria to sustain economic growth especially as it relates to agriculture and food security, renewable energy for power generation must be included in the nation's rural development plan. It also demonstrated that renewable energy poses an opportunity for mitigating the nation's contributions to anthropogenic climate change.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100045"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052021000388/pdfft?md5=76a75bc056399ba011039e83e06fd1c6&pid=1-s2.0-S2666052021000388-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75169147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shock-tube laser absorption measurements of N2O time histories during ammonia oxidation","authors":"Sulaiman A. Alturaifi,&nbsp;Olivier Mathieu,&nbsp;Eric L. Petersen","doi":"10.1016/j.jfueco.2022.100050","DOIUrl":"10.1016/j.jfueco.2022.100050","url":null,"abstract":"<div><p>The oxidation of ammonia was studied experimentally by monitoring the time history of the intermediate N₂O species using laser absorption spectroscopy. Experiments were conducted in a shock tube for mixtures of NH₃/O₂ diluted in ∼96.7% Ar for equivalence ratios of 0.54, 1.03, and 1.84. The equivalence ratios were determined accurately using spectroscopic measurements of NH₃ with another laser before each experiment. Experiments were performed at an average pressure of 1.2 atm and covered a temperature range of 1829 to 2198 K. For the same temperature, experiments revealed that increasing the equivalence ratio leads to less N₂O formation. The time-history profiles showed that N₂O is formed at the beginning of the experiments, mainly from the formed NO, until reaching a peak. The N₂O is then fully consumed, mainly via its reaction with H-atom. Characteristic parameters, such as the N₂O peak time and mole fraction, were extracted from the N₂O profiles and compared with 15 recent NH₃ kinetics models. The comparison revealed that none of the existing kinetics models were able to correctly predict both the peak N₂O time and mole fraction together. Two of the models were selected to perform a chemical analysis, and an improvement of the predictive capability of one model is proposed. The N₂O profiles reported herein are excellent validation targets that offer stringent constraints for the improvement of future NH₃ kinetics models.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100050"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052022000024/pdfft?md5=be3da37a3145b5b73c1c3a1b8d751bb8&pid=1-s2.0-S2666052022000024-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72552017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydro-geochemical autographs, attribute indicators and health threat evaluation of Fluoride and Ironic elements variability in ground water in Abuja North-central Nigeria","authors":"Ehizemhen Christopher Igibah ,&nbsp;Olugbenga Oludolapo Amu ,&nbsp;Lucia Omolayo Agashua ,&nbsp;Oluwaseun Adedapo Adetayo","doi":"10.1016/j.jfueco.2021.100048","DOIUrl":"10.1016/j.jfueco.2021.100048","url":null,"abstract":"<div><p>Tap water from twenty-five houses using private water sources, in an area of ironic and fluoride mineralization (Abuja, Nigeria), was evaluated so to ascertain the extent of conformity with chemical clean water quality criterions, and how this is inspired through householder water treatment resolutions. The percentage of analyses surpassing water quality criteria were high, with 67% of tap water samples above one or more chemical criterions. The greatest exceedances for health-established criterions were iron (44%) and fluoride (40%). The concentration of iron in borehole water varied at different sites, between 0.01 mg/L and 2.95 mg/L with an average value of 1.02 mg/L while that of fluoride ranged from 0.47 mg/L to 1.84 mg/L with an average value of 1.28 mg/L. The Hierarchical cluster analysis revealed three common clusters in which the samples may be grouped. The carcinogenic threat was calculated with defined procedures by USEPA considering ingesting and dermal pathways. The CDI values for iron and fluoride varied from 6.80E-04 to 0.20 and 8.33E-02 to 0.12 for children, while adults’ index was 9.17E-04 to 1.56E-02 and 5.56E-02 to 1.44E-02, respectively. For Total Threat Index (TTI), adults and children are below 1.0 for both iron and fluoride in all the examined locations.</p></div>","PeriodicalId":100556,"journal":{"name":"Fuel Communications","volume":"10 ","pages":"Article 100048"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666052021000418/pdfft?md5=8bb31bb76ff634250c680163c9ef9671&pid=1-s2.0-S2666052021000418-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89106708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}