Physics of lithium bromide (LiBr) solution dewatering through vapor venting membranes

Performance of a Solar Absorption Cooling System Using Nanofluids and a Membrane-Based Microchannel Desorber

“…The authors of [11] used a desorber with rectangular microchannels and concluded that pore diameters smaller than 1 micron are valid. In a different work [12], when a comparison to the results of [9] was performed, desorption rates obtained were one order of magnitude higher.…”

A review of membrane contactors applied in absorption refrigeration systems

“…Yu et al [2] used a cellulose triacetate membrane, Riffat et al [3] used dense membrane and silicon porous membrane, Schaal et al [4], Thorud et al [5], Wang et al [6], Ali and Schwerdt [7] used hydrophobic porous membrane, Isfahani et al [8,9], Isfahani and Moghaddam [10] and Bigham et al [11,12] used superhydrophobic nanofibrous membrane, Drost et al [1] used a woven membrane and a laser-machined membrane. The laser-machined membranes have higher water vapour permeability as compared to commercially available hydrophobic porous membranes, albeit with a high cost.…”

“…Thorud et al [5], Isfahani et al [8,9] and Bigham et al [12] used the concept of the plateand-frame heat exchanger and manufactured a laboratory scale desorber to investigate the performance of a plate-and-frame membrane module. Ali [49,50], Ali and Schwerdt [7,15], Yu et al [16], Isfahani et al [8], Isfahani and Moghaddam [10] and Bigham et al [11] used the plate-and-frame membrane module for investigating the application of membrane contactors in the absorber.…”

“…Isfahani et al [9] experimentally investigated the influence of wall temperature, solution and vapour pressures and solution mass flow rate on the desorption rate of a membrane-based desorber in which the solution was constrained by a thin microporous membrane. They analyzed two mechanism of desorption based on the diffusion of refrigerant molecules across the membrane.…”

Novel absorption refrigeration system with a hollow fiber membrane-based generator

“…Note that internal channel boiling did not affect the desorption performance as long as the entire vapor in the micro-channel evaporated through the membrane. Isfahani et al (2014) also reported the water desorption rate from LiBr solution through a flat membrane and proposed two desorption modes, namely the direct diffusion mode in which water molecules exit from subsequent solution flow and the boiling diffusion mode in which water vapor bubbles exist in the solution flow. They observed that the solution pressure and flow rate had no effect on the desorption rate in the direct diffusion mode, but in the boiling diffusion mode, the desorption performance was enhanced with an increase in either factor.…”