Theoretical storage capacity for solar air pretreatment liquid collector/regenerator

Abstract

A new liquid regeneration equipment—solar air pretreatment collector/regenerator for liquid desiccant cooling system is put forward in this paper, which is preferable to solution regeneration in hot and moist climate in South China. The equipment can achieve liquid regeneration in lower temperature. When the solution and the air are in “match” state in collector/regenerator, a match air to salt mass ratio ASMR ∗ is found by theoretical study in which there is the largest theoretical storage capacity SC max. At T r = 60 °C and X in = 2.33 kg/kg, theoretical calculation discovers when Y in drops from 29 to 14 g/kg, the SC max increase 50% compared with ASMR ∗ being around 26–27. After two new concepts of the effective solution proportion (EPS) and the effective storage capacity (ESC) are defined, it is found by theoretical calculation that when ESP drops from 100% to 67%, ESC raises lowly, not drops and liquid outlet concentration C str.sol increases from 40% to 49% in which its increment totals to 90%. All these data explain fully that air pretreatment liquid regeneration equipment enables to improve the performance of liquid desiccant cooling system.