TY - JOUR
T1 - Aqueous solution of [EMIM][OAc]
T2 - Property formulations for use in air conditioning equipment design
AU - Qu, Ming
AU - Abdelaziz, Omar
AU - Sun, Xiao Guang
AU - Yin, Hongxi
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017
Y1 - 2017
N2 - Liquid desiccant air conditioning (LDAC) is a promising alternative to vapor compression refrigeration based space cooling and dehumidification for the reduction of energy consumption and the improvement of indoor air quality. However, its use in the air conditioning market is still very limited due to its high installation cost, intensive carryover, and high cost of operation and maintenance associated to the corrosion of the current desiccant liquids. Substitutes for the traditional desiccant liquids with better properties and no corrosion are highly needed. Ionic liquids, which are salts comprised of organic cations and inorganic anions or organic anions, have high thermal stability, negligible or no vapor pressure, varied solubility in water, low or no corrosion to metals, and low driving temperatures to achieve dew point temperatures. All of those characteristics make them as perfect substitutes for traditional desiccant liquids. Up to date, a very few research groups investigated ILs as potential alternatives to traditional desiccant liquids for LDAC. The study in the paper aimed to identify the ionic liquids as ideal desiccant liquids to achieve better cost-effectiveness and higher system performance of LDAC. There were 13 different ionic liquids (IL) identified and screened for the most promising candidate. 1-Ethyl-3-methylimidazolium acetate, [EMIM][OAc], was selected as an ideal candidate for the capable of the most adsorption and desorption. The paper was mainly focused on the development of calculation models for the thermo-physical properties of the aqueous solution of [EMIM][OAc] to represent the property data needed for use as the desiccant liquid in sorption-based air conditioning equipment. It aims to provide convenient methods for use in the design and model of the sorption-based air conditioning. The calculation models for the following thermo-physical properties of the aqueous solution of [EMIM][OAc] were proposed and presented in the paper: the vapor pressures, specific heat capacity, density, and dynamic viscosity at various temperatures and concentrations.
AB - Liquid desiccant air conditioning (LDAC) is a promising alternative to vapor compression refrigeration based space cooling and dehumidification for the reduction of energy consumption and the improvement of indoor air quality. However, its use in the air conditioning market is still very limited due to its high installation cost, intensive carryover, and high cost of operation and maintenance associated to the corrosion of the current desiccant liquids. Substitutes for the traditional desiccant liquids with better properties and no corrosion are highly needed. Ionic liquids, which are salts comprised of organic cations and inorganic anions or organic anions, have high thermal stability, negligible or no vapor pressure, varied solubility in water, low or no corrosion to metals, and low driving temperatures to achieve dew point temperatures. All of those characteristics make them as perfect substitutes for traditional desiccant liquids. Up to date, a very few research groups investigated ILs as potential alternatives to traditional desiccant liquids for LDAC. The study in the paper aimed to identify the ionic liquids as ideal desiccant liquids to achieve better cost-effectiveness and higher system performance of LDAC. There were 13 different ionic liquids (IL) identified and screened for the most promising candidate. 1-Ethyl-3-methylimidazolium acetate, [EMIM][OAc], was selected as an ideal candidate for the capable of the most adsorption and desorption. The paper was mainly focused on the development of calculation models for the thermo-physical properties of the aqueous solution of [EMIM][OAc] to represent the property data needed for use as the desiccant liquid in sorption-based air conditioning equipment. It aims to provide convenient methods for use in the design and model of the sorption-based air conditioning. The calculation models for the following thermo-physical properties of the aqueous solution of [EMIM][OAc] were proposed and presented in the paper: the vapor pressures, specific heat capacity, density, and dynamic viscosity at various temperatures and concentrations.
KW - 1-Ethyl-3-methylimidazolium acetate
KW - Ionic liquid
KW - Liquid desiccant
KW - Sorption
KW - Thermo-physical properties
KW - [EMIM][OAc]
UR - http://www.scopus.com/inward/record.url?scp=85020753573&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2017.05.167
DO - 10.1016/j.applthermaleng.2017.05.167
M3 - Article
AN - SCOPUS:85020753573
SN - 1359-4311
VL - 124
SP - 271
EP - 278
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
ER -