Investigation on the Regeneration and Corrosion Characteristics of an Anodized Aluminum Plate Regenerator

Abstract

Abstract:The traditional vapor compression cooling system (VCS) has been criticized for its heavy reliance on electricity consumption and limited control ability of humidity. Compared with the VCS, the liquid desiccant cooling system (LDCS) is more efficient by handling the sensible and latent load separately. The present study investigated the regeneration and corrosion characteristics of an anodized aluminum plate regenerator for the first time. Comparative tests were conducted to present the regeneration and corrosion characteristics of the normal and anodized regenerator. The influence of internal heating on the regeneration performance was also identified. The results showed that the corrosion rate was reduced from 0.0005218 mm/year for normal aluminum to 0.000011 m/year for anodized one under the same operating conditions. However, pitting corrosion was observed at operating conditions with high solution temperature, as the anodized layer of anodized aluminum was damaged due to the high temperature. Compared with the normal aluminum regenerator, the anodized one had an average enhancement of 24% and 23.7% in terms of regeneration rate and effectiveness, respectively. It was attributed to the increment of surface energy from 26.4 mN/m for normal aluminum to 47.6 mN/m for anodized plate. Besides, it was found that, compared with adiabatic one, the internally-heated regenerator improved the regeneration rate by 6.0%~38% and the regeneration effectiveness by 6.3%~32% depending on the operating conditions. The advantage of present study is that it can guide the design of anodized aluminum regenerator for LDCS.

Comparative study of the regeneration characteristics of LiCl and a new mixed liquid desiccant solution

“…The Tafel polarization curves for both the 35% LiCl solution and the mixed solution were then obtained at the corresponding setting in the electrochemical work station. The scanning speed for the polarization curve was 1 mV/s, and the scanning range was −0.25V to 0.25V relative to the open circuit potential during the test [28]. Fig.…”

Numerical and experimental study on internally cooled liquid desiccant dehumidification concerning film shrinkage shape and vapor condensation

“…As one of the key components in LDCS, the dehumidifier has been studied both experimentally and numerically in terms of heat and mass transfer performance [7][8][9][10][11].…”

“…Therefore, it has drawn more and more attention in recent years [7][8][9] and the present study selected the plate type as the research object. Different types of mathematics models have been developed to describe the heat and mass transfer processes in the internal cooling plate dehumidifier [7][8][9][10][11][12][13][14][15].…”

Development and investigation on the dehumidification and corrosion resistance performance of a new mixed liquid desiccant

“…1. Even the stainless steel 304 cannot resist the 4 / 25 corrosion from lithium chloride solution, needless to say the commonly used aluminum and copper [18][19][20][21]. The corrosion on mass transfer component can not only affect the dehumidification/regeneration performance but also reduce the system reliability dramatically.…”