入口付近に熱流束分布をもつ円管加熱流路における管内層流熱伝達率の予測

抄録

A desiccant air conditioning system which can handle the sensible and latent heats in the air separately is generally composed of a dehumidifying rotor with desiccant material, a heat source for regeneration of the material and a heat exchanger controlling the dehumidified air temperature. We proposed a desiccant rotor heated by solar irradiation, concentrated by Fresnel lens, impinging the rotor directly. The irradiation has a distribution along the channel on the wall in a rotor. This study presents local heat transfer coefficient on the wall by performing a CFD simulation assuming laminar forced convection heat transfer in a circular channel. The results showed that the coefficients decreased along the channel. Comparing with the result considering uniform heat flux condition, the decreasing rate was large, and it didn't reach a constant value obtained at the fully developed flow region.