Abstract:

The mathematical model of enthalpy recovery wheel is established.Based on this model, the effects of wheel thickness, wheel rotational speed and air velocity on the enthalpy recovery efficiency of enthalpy wheel are investigated.Three different desiccants, namely silica gel, lithium chloride and silica gel-lithium chloride composite, are used as desiccant material. The results demonstrate that, silica gel-lithium chloride composite desiccant is the first choice for enthalpy recovery wheel in comparison to silica gel and lithium chloride.And there exist optimal rotation speed, wheel thickness and air velocity.For silica gel-lithium chloride composite, the corresponding values are respectively 12 r•min^-1, 100 mm and 1.2 m•s^-1 under calculation conditions.