ASME 2019 13th International Conference on Energy Sustainability最新文献_第6页

Performance Enhancement of Solar Air Conditioners Using Hybrid Heat Rejection System 利用混合散热系统提高太阳能空调的性能

ASME 2019 13th International Conference on Energy Sustainability Pub Date : 2019-07-14 DOI: 10.1115/es2019-3930

A. Iqbal, Ali Al-Alili

引用次数: 0

Characterization of Particle and Heat Losses From Falling Particle Receivers 从下落粒子接收器的粒子和热损失的表征

ASME 2019 13th International Conference on Energy Sustainability Pub Date : 2019-07-14 DOI: 10.1115/es2019-3826

C. Ho, Sean Kinahan, Jesus D. Ortega, P. Vorobieff, A. Mammoli, Vanderlei Martins

{"title":"Characterization of Particle and Heat Losses From Falling Particle Receivers","authors":"C. Ho, Sean Kinahan, Jesus D. Ortega, P. Vorobieff, A. Mammoli, Vanderlei Martins","doi":"10.1115/es2019-3826","DOIUrl":"https://doi.org/10.1115/es2019-3826","url":null,"abstract":"\u0000 Camera-based imaging methods were evaluated to quantify both particle and convective heat losses from the aperture of a high-temperature particle receiver. A bench-scale model of a field-tested on-sun particle receiver was built, and particle velocities and temperatures were recorded using the small-scale model. Particles heated to over 700 °C in a furnace were released from a slot aperture and allowed to fall through a region that was imaged by the cameras. Particle-image, particle-tracking, and image-correlation velocimetry methods were compared against one another to determine the best method to obtain particle velocities. A high-speed infrared camera was used to evaluate particle temperatures, and a model was developed to determine particle and convective heat losses. In addition, particle sampling instruments were deployed during on-sun field tests of the particle receiver to determine if small particles were being generated that can pose an inhalation hazard. Results showed that while there were some recordable emissions during the tests, the measured particle concentrations were much lower than the acceptable health standard of 15 mg/m3. Additional bench-scale tests were performed to quantify the formation of particles during continuous shaking and dropping of the particles. Continuous formation of small particles in two size ranges (< ∼1 microns and between ∼8–10 microns) were observed due to de-agglomeration and mechanical fracturing, respectively, during particle collisions.","PeriodicalId":219138,"journal":{"name":"ASME 2019 13th International Conference on Energy Sustainability","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129282440","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: 10

Performance Characteristics of Philippine Hydrous Ethanol-Gasoline Blends: Preliminary Findings 菲律宾含水乙醇-汽油混合物的性能特征:初步发现

ASME 2019 13th International Conference on Energy Sustainability Pub Date : 2019-07-14 DOI: 10.1115/es2019-3824

J. Yu, E. Quiros

{"title":"Performance Characteristics of Philippine Hydrous Ethanol-Gasoline Blends: Preliminary Findings","authors":"J. Yu, E. Quiros","doi":"10.1115/es2019-3824","DOIUrl":"https://doi.org/10.1115/es2019-3824","url":null,"abstract":"\u0000 To reduce dependence on imported fossil fuels and develop indigenous biofuels, the Philippines enacted the Biofuels Act of 2006 which currently mandates a 10% by volume blend of 99.6% anhydrous bio-ethanol for commercially sold Unleaded and Premium gasolines. To urge a regulation review of the anhydrous requirement and examine the suitability for automotive use of hydrous bioethanol (HBE) blends, preliminary engine dynamometer tests at 1400–4400 rpm were conducted to measure specific fuel consumption (SFC) and power. In this study, HBE (95 % ethanol and 5% water by volume) produced from sweet sorghum using a locally-developed process, was blended volumetrically with three base gasoline fuels — Neat, Unleaded, and Premium. The four HBE blends tested were 10% and 20% with Neat gasoline, 20% with Unleaded gasoline, and 20% with Premium gasoline.\u0000 For blends with Neat gasoline, the SFC of the 10%HBE blend was comparable with to slightly higher than Neat gasoline. The SFC of the 20%HBE blend was comparable with Neat gasoline up to 2800 rpm and lower beyond this speed thus being better overall than the 10%HBE blend. Compared to their respective commercial base fuels, the HBE-Unleaded blend showed lower SFC while the HBE-Premium blend yielded slightly higher SFC over most of the engine speed range. Between commercial fuel blends, the HBE-Unleaded blend gave better SFC than the HBE-Premium blend. Power was practically similar for the fuels tested. No engine operational problems and fuel blend phase separation were encountered during the tests. This preliminary study indicated the suitability of and possible optimum hydrous bio-ethanol blends for automotive use under Philippine conditions.","PeriodicalId":219138,"journal":{"name":"ASME 2019 13th International Conference on Energy Sustainability","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123789887","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

Renewable Hydrogen Production via Thermochemical/Electrochemical Coupling 通过热化学/电化学耦合可再生制氢

ASME 2019 13th International Conference on Energy Sustainability Pub Date : 2018-09-01 DOI: 10.1115/ES2019-3905

S. Babiniec, A. Ambrosini, James E Miller

{"title":"Renewable Hydrogen Production via Thermochemical/Electrochemical Coupling","authors":"S. Babiniec, A. Ambrosini, James E Miller","doi":"10.1115/ES2019-3905","DOIUrl":"https://doi.org/10.1115/ES2019-3905","url":null,"abstract":"\u0000 A coupled thermochemical/electrochemical cycle was investigated to produce hydrogen from renewable resources. Like a conventional thermochemical cycle, this approach leverages chemical energy stored in a thermochemical working material that is reduced thermally by solar energy. However, in this concept, the stored chemical energy provides only a fraction of the energy required for effectively splitting steam to produce hydrogen. To push the reaction towards completion, an electrically-assisted proton-conducting membrane is employed to separate and recover hydrogen as it is produced. This novel coupled-cycle concept provides several benefits. First, the required oxidation enthalpy of the reversible thermochemical material is decreased, enabling the process to occur at lower temperatures. Second, removing the requirement for spontaneous steam splitting widens the scope of materials compositions, allowing for less expensive/more abundant elements to be used. Lastly, thermodynamics calculations suggest that this concept can potentially reach higher efficiencies than photovoltaic-to-electrolysis hydrogen production. A novel thermochemical/electrochemical test stand was conceptualized and constructed to prove the concept, and the practical feasibility of the proposed coupled cycle was assessed by validating the individual components of the system: proton conduction across a BaCe0.1Zr0.8Y0.1O3-δ (BCZY18) membrane, thermochemical activity of the CaAl0.2Mn0.8O3−δ (CAM28) working material reduced at 650 °C, and indirect observation of hydrogen production.","PeriodicalId":219138,"journal":{"name":"ASME 2019 13th International Conference on Energy Sustainability","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123453799","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