Investigation on the regeneration characteristics of LiCl solution with PVP and MWNTs

Abstract

The falling film regeneration performance of a plate type regenerator with the adding of surfactant PVP and MWNTs was experimentally studied. The steady nanofluid contained MWNTs was fabricated firstly. The regeneration characteristics of LiCl/H2O solution, LiCl/H2O-PVP solution and LiCl/H2O-MWNTs nanofluid were studied and compared under various experimental conditions. The experimental results show that the regeneration effectiveness of LiCl/H2O-PVP solution and LiCl/H2O-MWNTs nanofluid have an improvement of 24.2% and 23.9% respectively compared with that of LiCl/H2O solution. The improvement results from the increment of wetting area and decrement of falling film thickness. However, the addition of MWNTs into LiCl/H2O-PVP solution has negligible influence on the regeneration performance.