Heat and mass transfer in laminar falling film absorption: A compact analytical model

Investigating the performance of heat exchangers in absorption heat pump systems using both numerical and experimental methods

“…Their numerical model was solved by an implicit finite difference scheme and the local and global analysis were performed. Mahyar et al [22] investigated a new analytical solution for non-volatile absorbents based on the Laplace transform approach and proposed compact relationships to compute the heat and mass transfer rates in the falling film absorption process. Existing literature involves numerical and experimental studies of falling film evaporation and absorption processes.…”

“…This is because with ambient temperature of -7 ℃ and supply water temperature of 41 ℃, the predicted coefficient of performance was 1.04 and 1.06 for R134a-DMF and R161-DMF, respectively. The frost prediction indicated that at the time of 3,600 s, the thickness of the frost layer in the heavy frost area was 0.94mm, with a total frost mass of 3,995 g. Compared with the initial stage, the sensible and latent heat transfer rates decreased by 22…”