scholarly journals Vapor Pressure and Physicochemical Properties of {LiBr + IL-Based Additive + Water} Mixtures: Experimental Data and COSMO-RS Predictions

2021 ◽  
Author(s):  
Marta Królikowska ◽  
Michał Skonieczny ◽  
Kamil Paduszyński ◽  
Maciej Zawadzki
Keyword(s):  
Experimental Data ◽  
Physicochemical Properties ◽  
Dynamic Viscosity ◽  
Lithium Bromide ◽  
Water Systems ◽  
Future Research ◽  
Current State ◽  
Data Prediction ◽  
Aqueous Lithium Bromide ◽  
Absorption Refrigeration System

AbstractIn recent years, many compounds have been proposed as additives to conventional working fluids to improve the performance of the absorption refrigeration system. The main aim of this research is to show the influence of ionic liquid based additives on thermodynamic and physicochemical properties of {LiBr + water} solutions. The following additives: 3-(1-methyl-morpholinium)propane-1-sulfonate, N,N-di(2-hydroxyethyl)-N,N-dimethylammonium bromide, and N,N,N-tri(2-hydroxy-ethyl)-N-methylammonium bromide have been added to aqueous lithium bromide solutions (IL to LiBr mass fraction, w2 = 0.3). The physicochemical and thermodynamic properties of {LiBr (1) + additive (2) + water (3)} and {LiBr + water} systems including (vapor + liquid) phase equilibria (VLE), density (ρ) and dynamic viscosity (η) were determined over wide temperature and composition ranges. The conductor-like screening model for real solvents (COSMO-RS) was used for the VLE data prediction. For the density and dynamic viscosity correlations, empirical equations were applied. A comparison of experimental data for {LiBr + additive + water} with those for {LiBr + water} systems shows the influence of using the additives proposed in this work. The data presented are complementary to the current state of knowledge in this area and provide directions for future research.

scholarly journals Moving sociohydrology forward: a synthesis across studies

2015 ◽  
Vol 12 (3) ◽  
pp. 3319-3348 ◽  
Author(s):  
T. J. Troy ◽  
M. Konar ◽  
V. Srinivasan ◽  
S. Thompson
Keyword(s):  
Complex Systems ◽  
System Dynamics ◽  
Coupled System ◽  
Water Systems ◽  
Ecological System ◽  
Future Research ◽  
Special Issue ◽  
Current State ◽  
Social Ecological ◽  
The Social

Abstract. Sociohydrology is the study of coupled human–water systems with the premise that water and human systems co-evolve, often with two-way coupling. A recent special issue in HESS/ESD, "Predictions under change: water, earth, and biota in the Anthropocene", includes a number of sociohydrologic publications that allow for a survey of the current state of understanding of sociohydrology and the coupled system dynamics and feedbacks, the research methodologies available, and the norms and ethics involved in studying sociohydrologic systems. Although sociohydrology is concerned with coupled human–water systems, it is critical to consider the sociohydrologic system as embedded in a larger, complex social–ecological system through which human–water feedbacks can occur and from which the sociohydrologic system cannot be isolated. As such, sociohydrology can draw on tools developed in the social–ecological and complex systems literature to further our sociohydrologic knowledge, and this is identified as a ripe area of future research.

The Correlation of Simultaneous Heat and Mass Transfer Experimental Data for Aqueous Lithium Bromide Vertical Falling Film Absorption

2000 ◽  
Vol 123 (1) ◽  
pp. 30-42 ◽  
Author(s):  
William A. Miller ◽  
Majid Keyhani
Keyword(s):  
Experimental Data ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Lithium Bromide ◽  
Falling Film ◽  
Bulk Concentration ◽  
Design Data ◽  
Flux Approximation ◽  
Aqueous Lithium Bromide ◽  
Simultaneous Heat

A study of simultaneous heat and mass transfer was conducted on a vertical falling film absorber to better understand the mechanisms driving the heat and mass transfer processes. Thermographic phosphors were successfully used to measure the temperature profile along the length of the absorber test tube. These measures of the local variations in temperature enabled calculation of the bulk concentration along the length of the absorber. The bulk concentration varied linearly, which infers that the concentration gradient in the direction of flow is approximately constant. The implication is that the mass flux and therefore the absorber load can be solved for using a constant flux approximation. Design data and correlations are sparse in the open literature. Some experimental data are available; however, all literature data to date have been derived at mass fractions of lithium bromide ranging from 0.30 to 0.60. Experiments were therefore conducted with no heat and mass transfer additive on an internally cooled smooth tube of 0.01905-m outside diameter and of 1.53-m length. The data, for testing at 0.62 and 0.64 mass fraction, were scaled and correlated into both Nu and Sh formulations. The average absolute error in the Nu correlation is about ±3.5% of the Nu number reduced from the experimental data. The Sh correlation is about ±5% of the reduced Sh data. Data from the open literature were reduced to the authors Nu and Sh formulations, and were within 5% of the correlations developed in the present study. The study therefore provides test data with no heat and mass transfer additive and correlations for the coupled heat- and mass-transfer process that are validated against the extensive experimental data.

scholarly journals Moving sociohydrology forward: a synthesis across studies

2015 ◽  
Vol 19 (8) ◽  
pp. 3667-3679 ◽  
Author(s):  
T. J. Troy ◽  
M. Konar ◽  
V. Srinivasan ◽  
S. Thompson
Keyword(s):  
Ethical Issues ◽  
Social Systems ◽  
Water System ◽  
Water Systems ◽  
Future Research ◽  
Current State ◽  
Social Ecological ◽  
The Social ◽  
Global Food ◽  
Human Systems

Abstract. Sociohydrology is the study of coupled human–water systems, building on the premise that water and human systems co-evolve: the state of the water system feeds back onto the human system, and vice versa, a situation denoted as "two-way coupling". A recent special issue in HESS/ESD, "Predictions under change: water, earth, and biota in the Anthropocene", includes a number of sociohydrologic publications that allow for a survey of the current state of understanding of sociohydrology and the dynamics and feedbacks that couple water and human systems together, of the research methodologies being employed to date, and of the normative and ethical issues raised by the study of sociohydrologic systems. Although sociohydrology is concerned with coupled human–water systems, the feedback may be filtered by a connection through natural or social systems, for example, the health of a fishery or through the global food trade, and therefore it may not always be possible to treat the human–water system in isolation. As part of a larger complex system, sociohydrology can draw on tools developed in the social–ecological and complex systems literature to further our sociohydrologic knowledge, and this is identified as a ripe area of future research.

scholarly journals Theoretical Formulation of the Thermodynamic Properties of Ammonia-Water and Ammonia-Water-Lithium Bromide Solutions

2020 ◽  
Vol 9 (2) ◽  
pp. 683-687
Keyword(s):  
Experimental Data ◽  
Thermodynamic Properties ◽  
Lithium Bromide ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Theoretical Formulation ◽  
Ammonia Water ◽  
Absorption Refrigeration System ◽  
Bromide Solutions ◽  
Good Agreement

System of Ammonia-Water-Lithium Bromide overcomes the disadvantage of Ammonia-Water absorption refrigeration system. Addition of lithium bromide reduces the formation of water vapour thus presents its entry into the condenser. A set of computational formulations of thermodynamic and Thermophysical properties of Ammonia-Water, Water-Lithium bromide and Ammonia-Water-Lithium Bromide solutions at different pressures and temperatures are presented in the paper. Obtained results are validated with the experimental data which were available in the literature. It is found to be in good agreement with those values of the literature..

Self-leadership Training Review

2019 ◽  
Author(s):  
Andrew Sidwell ◽  
Michael Perry
Keyword(s):  
Leadership Training ◽  
Future Research ◽  
Training Methods ◽  
Current State ◽  
A Current

The purpose of this article was to examine the current state of self-leadership training. The authors analyzed all published, publicly available studies (in English) pertaining to self-leadership training methods, offering a current state of self-leadership training, and implications for future research.

From Globalisation to Revolution? The Porfirian Political Economy: An Essay on Issues and Interpretations

2009 ◽  
Vol 41 (2) ◽  
pp. 347-368 ◽  
Author(s):  
PAOLO RIGUZZI
Keyword(s):  
Political Economy ◽  
Mexican Revolution ◽  
Future Research ◽  
The Political ◽  
Economic Relations ◽  
Future Research Agenda ◽  
Current State ◽  
International Economic Relations ◽  
Economic Strategies ◽  
State Finance

AbstractThis essay evaluates the political economy of Mexico during the Porfirian period (1876–1911), with the aim of discussing advances in scholarship and presenting an outline of the elements for a future research agenda. To this end, the essay examines the current state of knowledge on four crucial aspects of the Mexican economy: growth and its dimensions; the state, finance and economic strategies; the construction and functioning of the internal market; and the international economic relations of Mexico during the first period of globalisation. In particular, it assesses the arguments that link features of Porfirian economic organisation with the outbreak of the Mexican Revolution in 1910.

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