Unfavorable transport properties have always been pointed out as the key factors that hinder the application of ammonia/ionic liquids (NH 3 /ILs) in absorption cycles, while heat and mass transfer of these new fluids in components have been rarely reported. In this study, a corrugated plate heat exchanger is selected as the geometry for exploring the absorption of NH 3 in the proposed NH 3 /ILs working fluids. The process is studied making use of a semi-empirical framework: experimental data is needed to determine unknown information of heat and mass transfer, and a numerical model is developed making use of frequently applied theories. In addition, relevant transport properties of the NH 3 /ILs working fluids are modeled based on collected experimental data. The proposed model is used to study the heat and mass transfer performance during the absorption of NH 3 vapor into NH 3 /ILs fluids. Distribution of local parameters and overall heat and mass transfer characteristics are obtained. The performance of absorption of NH 3 into different working fluids is investigated as well. The overall heat transfer coefficient is found around 1.4 kW/(m 2 ·K) for the most promising working fluid NH 3 /[emim][SCN].
|Journal||International Journal of Heat and Mass Transfer|
|Publication status||Published - 2019|
- Heat transfer
- Ionic liquid
- Lithium nitrate
- Mass transfer
- Plate heat exchanger