CFD simulation to investigate heat and mass transfer processes in a membrane-based absorber for water-LiBr absorption cooling systems

Adiabatic vs non-adiabatic membrane-based rectangular micro-absorbers for H2O-LiBr absorption chillers

“…Convection coefficients obtained from Eqs. (11) and (12) were modified by the Ackermann factor (Taylor and Krishna [18]):…”

“…Bigham et al [10] developed a study including micro-scale features at the surface of the solution channels, showing an increase in the mass transport. A review about the use of membranes in absorbers of absorption cooling systems was performed by Asfand and Bourouis [11], while Asfand et al [12] developed a CFD simulation of a membrane-based absorber. They concluded that the absorption rate increased by a factor of 2.5 when the solution inlet flow velocity was augmented from 1.18 to 4.72 mm s -1 .…”

Experimental characterisation of a novel adiabatic membrane-based micro-absorber using H2O-LiBr

“…Considering the solution film thickness and solution velocity, experimental studies of absorbers using the H2O-LiBr solution and a hydrophobic membrane of Ali and Schwerdt [7], and simulations of Yu et al [9] and Asfand et al [10], lead to the main similar conclusion: the absorption rate increases if the solution film thickness is reduced and the solution velocity increases.…”

Role of Membrane Technology in Absorption Heat Pumps: A Comprehensive Review

“…Asfand et al [ 112 , 113 ] reported numerical simulations to analyze the effect of the membrane characteristics (pore size, porosity, and thickness) and the operating conditions on the absorption process in a plate-and-frame membrane desorber with the LiBr-water mixture. The analyses demonstrated that the solution channel thickness was the most restrictive parameter for the mass transfer process.…”