The Open Thermodynamics Journal最新文献_第3页

Adsorption Thermodynamics in the Framework of the Modified Associate Formalism 修正关联形式框架下的吸附热力学

The Open Thermodynamics Journal Pub Date : 2011-09-12 DOI: 10.2174/1874396X01105010011

D. Saulov, V. Rudolph, A. Klimenko

引用次数: 1

GE models and algorithms for condensed phase equilibrium data regression in ternary systems: limitations and proposals 三元系统中凝聚相平衡数据回归的GE模型和算法:限制和建议

The Open Thermodynamics Journal Pub Date : 2011-08-30 DOI: 10.2174/1874396X01105010048

A. M. Gomis, J. A. Reyes-Labarta, María Dolores Serrano Cayuelas, M. López

{"title":"GE models and algorithms for condensed phase equilibrium data regression in ternary systems: limitations and proposals","authors":"A. M. Gomis, J. A. Reyes-Labarta, María Dolores Serrano Cayuelas, M. López","doi":"10.2174/1874396X01105010048","DOIUrl":"https://doi.org/10.2174/1874396X01105010048","url":null,"abstract":"Phase equilibrium data regression is an unavoidable task necessary to obtain the appropriate values for any model to be used in separation equipment design for chemical process simulation and optimization. The accuracy of this process depends on different factors such as the experimental data quality, the selected model and the calculation algorithm. The present paper summarizes the results and conclusions achieved in our research on the capabilities and limitations of the existing G E models and about strategies that can be included in the correlation algorithms to improve the convergence and avoid inconsistencies. The NRTL model has been selected as a representative local composition model. New capabilities of this model, but also several relevant limitations, have been identified and some examples of the application of a modified NRTL equation have been discussed. Furthermore, a regression algorithm has been developed that allows for the advisable simultaneous regression of all the condensed phase equilibrium regions that are present in ternary systems at constant T and P. It includes specific strategies designed to avoid some of the pitfalls frequently found in commercial regression tools for phase equilibrium calculations. Most of the proposed strategies are based on the geometrical interpretation of the lowest common tangent plane equilibrium criterion, which allows an unambiguous comprehension of the behavior of the mixtures. The paper aims to show all the work as a whole in order to reveal the necessary efforts that must be devoted to overcome the difficulties that still exist in the phase equilibrium data regression problem.","PeriodicalId":238681,"journal":{"name":"The Open Thermodynamics Journal","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130659430","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: 35

Numerical Simulation of Turbulent Flow and Heat Transfer in an Anti- Gravity Blind Duct with Tangential Entry Jet 具有切向入口射流的反重力盲管湍流流动和传热的数值模拟

The Open Thermodynamics Journal Pub Date : 2011-01-19 DOI: 10.2174/1874396X01105010001

S. Chang, Zong-Xian Cai

{"title":"Numerical Simulation of Turbulent Flow and Heat Transfer in an Anti- Gravity Blind Duct with Tangential Entry Jet","authors":"S. Chang, Zong-Xian Cai","doi":"10.2174/1874396X01105010001","DOIUrl":"https://doi.org/10.2174/1874396X01105010001","url":null,"abstract":"This numerical study investigates the flow and heat transfer characteristics in a vertical square blind duct with the coolant fed by a tangential entry jet. The detailed Nusselt number (Nu) distributions over the five constituent walls of the blind duct are calculated at duct (jet) Reynolds numbers Re(Rej) of 5000(20000), 7000(28000) and 10000(40000) us- ing the commercial CFD Star CD code. As an attempt to explore the buoyancy effect on heat transfer performances, three different heat fluxes, which vary the gravitational Grashof numbers (Grg) at the fixed Re, are imposed on each duct wall to vary the buoyancy levels. The jet-induced flow phenomena in the blind duct exhibit various heat transfer impacts on the five duct walls over which the different near-wall flow structures are generated. This is demonstrated by cross-examining the detailed Nu distributions and the area-averaged Nusselt number ( Nu ) over the five duct walls at the tested Re and Grg. The cross-plane swirls induced by the tangential entry jet together with the impinging jet flows considerably elevate the Heat Transfer Enhancement (HTE) performances in the blind duct. Within the parametric conditions simulated, the ratios of Nu to the Dittus-Boelter levels (Nu� ) over the jet wall, back wall, impingement wall, side wall and end wall are re- spectively raised to 3-5.7, 2.8-5.6, 3-5.8, 2.7-4.8 and 3.1-6.1; while the HTE ratios ( Nu /Nu� ) over these duct walls con- sistently decrease as Re increases.","PeriodicalId":238681,"journal":{"name":"The Open Thermodynamics Journal","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127973538","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: 3

The Carbon Sequestration Capacity of Trees Expressed in Monetary Terms 用货币表示的树木固碳能力

The Open Thermodynamics Journal Pub Date : 2010-12-28 DOI: 10.2174/1874396X01004010220

J. C. Jones, R. Ball

引用次数: 2

Steady and Unsteady Fireline Intensity of Spreading Fires at Laboratory Scale 实验室尺度下火灾蔓延的稳定和非稳定火线强度

The Open Thermodynamics Journal Pub Date : 2010-11-24 DOI: 10.2174/1874396X01004010212

P. Santoni, F. Morandini, T. Barboni

引用次数: 9

Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide 超临界二氧化碳分离固体组分的相平衡研究

The Open Thermodynamics Journal Pub Date : 2010-11-11 DOI: 10.2174/1874396X01004010201

A. Karim, D. Kassim, M. S. Hameed

{"title":"Phase Equilibrium Study for the Separation of Solid Components Using Supercritical Carbon Dioxide","authors":"A. Karim, D. Kassim, M. S. Hameed","doi":"10.2174/1874396X01004010201","DOIUrl":"https://doi.org/10.2174/1874396X01004010201","url":null,"abstract":"The equilibrium mole fraction solubility of low volatile solid components (naphthalene and phenanthrene) in supercritical pure carbon dioxide was studied at temperature range (308.15-333.15 K) and pressures up to 200 bars. In the present study a measure of the effect of temperature and pressure were considered in the extraction process using super- critical carbon dioxide. The experiments were carried out using a designed apparatus similar to that used by King et al., (1). In this apparatus, the extracted gas (carbon dioxide) was re-circulated continuously over the component to be ex- tracted via a sample bomb till equilibrium is reached. The sample bomb is then isolated and its contents were analyzed. The results of analysis showed that the solubility of naphthalene and phenanthrene expressed in mole fraction depend strongly upon the pressure (density) of the supercritical carbon above the critical density. The obtained laboratory data are correlated with three cubic equations of state, Redlich-Kwong (RK), Soave-Redlich- Kwong (SRK), and Peng-Robinson (PR). Comparison of experimental phase equilibrium data with the results predicted by the equations of state shows good representation.","PeriodicalId":238681,"journal":{"name":"The Open Thermodynamics Journal","volume":"2011 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130862103","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: 5

Exergy Analysis of a Compartment Fire 舱室火灾的火用分析

The Open Thermodynamics Journal Pub Date : 2010-10-14 DOI: 10.2174/1874396X01004010185

V. Bertola, E. Cafaro

引用次数: 0

Fire Control and Suppression by Water-Mist Systems 水雾系统的火灾控制和灭火

The Open Thermodynamics Journal Pub Date : 2010-10-14 DOI: 10.2174/1874396X01004010167

Paolo E. Santangelo, P. Tartarini

{"title":"Fire Control and Suppression by Water-Mist Systems","authors":"Paolo E. Santangelo, P. Tartarini","doi":"10.2174/1874396X01004010167","DOIUrl":"https://doi.org/10.2174/1874396X01004010167","url":null,"abstract":"The present work is an attempt to offer a comprehensive review of literature contributions, phenomenology and relevant results on water-mist systems. In particular, the water mist characterization and behavior in the field of fire con- trol and suppression have been identified as the main areas of investigation. Some key parameters have been analyzed to gain a quantitative evaluation of the physical phenomena related to water-mist systems. The water-mist fire suppression systems are an excellent alternative to halon fire protection systems, and they are now be- ing used in many areas, including marine and industrial applications. Therefore, a wide survey of the complete number of literature works on this topic would exceed the full length of the present paper and only some examples of important con- tributions will be mentioned here. This paper proposes an introductory list of relevant literature works and this reference survey is then deepened with work and result details on suppression mechanisms, spray characterizations and experimen- tal and numerical approaches. The final summary stresses out that a lot of experimental and numerical research and much application experience are still needed to gain better knowledge on water-mist systems, even if they already seem to be very promising in terms of efficiency and potentialities in fire control and suppression.","PeriodicalId":238681,"journal":{"name":"The Open Thermodynamics Journal","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130236202","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: 23

A Mathematical Model of the Smoke Layer Evolution in Compartment Fires 舱室火灾烟气层演化的数学模型

The Open Thermodynamics Journal Pub Date : 2010-10-14 DOI: 10.2174/1874396X01004010191

V. Bennardo, N. Inzaghi

引用次数: 1

Fires in Tunnels: Experiments and Modelling 隧道中的火灾:实验和建模

The Open Thermodynamics Journal Pub Date : 2010-10-14 DOI: 10.2174/1874396X01004010156

E. Cafaro, V. Bertola

引用次数: 18