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Multi-dimensional optimization of the incorporation of PCM-drywalls in lightwei...
Soares, N.; Gaspar, A. R.; Santos, P.; Costa, J. J.This paper evaluates the impact of PCM-drywalls in the annual and monthly heating and cooling energy savings of an air-conditioned lightweight steel-framed (LSF) residential single-zone building, considering real-life conditions and several European climates. A multi-dimensional optimization study is carried out by combining EnergyPlus and GenOpt tools. The CondFD-algorithm is used in EnergyPlus to simulate pha...
On the validity of lumped capacitance approaches for the numerical prediction o...
Ruivo, C. R.; Costa, J. J.; Figueiredo, A. R.In the present work, a detailed model of simultaneous heat and mass transfer through a desiccant micro-porous medium of a channel wall of compact heat and mass exchangers, such as desiccant wheels, was developed. The relevant phenomena considered by this model within the porous medium are surface diffusion of the adsorbed water, Knudsen diffusion of water vapour, heat conduction and the sorption process. A one-...
Experimental analysis of the use of wet porous media for thermal protection aga...
Figueiredo, A. R.; Costa, J. J.An experimental technique is implemented to analyse the behaviour of a wet porous medium under the direct impact of a flame, and the possibility of its use as a thermal protection device. The data obtained show that relatively thin and light thermal protections, with moderate values of water consumption, can be developed, presenting high levels of protection. The presentation of the data in a dimensionless form...
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