%0 Thesis %1 Faggembauu2006 %A Faggembauu, D. %C Terrassa %D 2006 %K advanced analysis and facades numerical of passive systems %T Heat Transfer and fluid-dynamics in double and single skin facades %X A significant proportion of the total national energy budget of european countries is spent in buildings, therefore the efforts addressed to optimize building’s thermal behaviour are of vital importance. In this sense, facades play a fundamental role. They act not only as barriers between external and internal conditions, but they can also help to reduce the consumption of energy for heating, ventilation and air conditioning. Moreover, they can help to produce healthy and comfortable indoor conditions. The use of large, transparent areas in facades is a common current practice. Despite the architectural interest of these glazed areas, in Mediterranean climatic conditions they are responsible for building overheating. In these zones, double-skin envelopes made up of two layers of glass separated by an air channel -to collect or evacuate the solar energy absorbed by the facade- are considered to be a design option that could resolve this issue. In other climatic conditions, large heat losses may constitute the most determinant factor. The objectives of this thesis are to give a step forward in the study and numerical analysis of passive systems in general, and advanced facades in particular. A transient code for the simulation of double and single skin facades including advanced technological elements, like phase change materials, transparent insulation and facade integrated collectors-accumulators has been developed. The features of the physic and mathematical models implemented are described. Instantaneous or integrated performance parameters describing thermal behaviour of the facades are defined. The numerical models implemented within the numerical tool have been submitted to a validation process in different forms: by comparing the numerical resultswith those obtained for simplified situations with analytical solutions, with tabulated global performance coefficients of simple facade configurations and with the results of other building simulation codes. Experimental research has been carried out in test cells situated at different geographical locations, thus they were subject to different climatic conditions. The main objective of the numerical code developed is to simulate advanced facades in order to assess the long termperformance, and to account with a virtual tool to test passive designs, including challenging innovations. The applications of the numerical tool described in this thesis, for the optimisation of facades of real buildings are presented. As future actions, the link of the onedimensional simulations produced by this numerical tool with a multi-dimensional simulation of specific zones of the facades is foreseen.

@phdthesis{Faggembauu2006, abstract = {A significant proportion of the total national energy budget of european countries is spent in buildings, therefore the efforts addressed to optimize building’s thermal behaviour are of vital importance. In this sense, facades play a fundamental role. They act not only as barriers between external and internal conditions, but they can also help to reduce the consumption of energy for heating, ventilation and air conditioning. Moreover, they can help to produce healthy and comfortable indoor conditions. The use of large, transparent areas in facades is a common current practice. Despite the architectural interest of these glazed areas, in Mediterranean climatic conditions they are responsible for building overheating. In these zones, double-skin envelopes made up of two layers of glass separated by an air channel -to collect or evacuate the solar energy absorbed by the facade- are considered to be a design option that could resolve this issue. In other climatic conditions, large heat losses may constitute the most determinant factor. The objectives of this thesis are to give a step forward in the study and numerical analysis of passive systems in general, and advanced facades in particular. A transient code for the simulation of double and single skin facades including advanced technological elements, like phase change materials, transparent insulation and facade integrated collectors-accumulators has been developed. The features of the physic and mathematical models implemented are described. Instantaneous or integrated performance parameters describing thermal behaviour of the facades are defined. The numerical models implemented within the numerical tool have been submitted to a validation process in different forms: by comparing the numerical resultswith those obtained for simplified situations with analytical solutions, with tabulated global performance coefficients of simple facade configurations and with the results of other building simulation codes. Experimental research has been carried out in test cells situated at different geographical locations, thus they were subject to different climatic conditions. The main objective of the numerical code developed is to simulate advanced facades in order to assess the long termperformance, and to account with a virtual tool to test passive designs, including challenging innovations. The applications of the numerical tool described in this thesis, for the optimisation of facades of real buildings are presented. As future actions, the link of the onedimensional simulations produced by this numerical tool with a multi-dimensional simulation of specific zones of the facades is foreseen.}, added-at = {2011-09-01T13:26:03.000+0200}, address = {Terrassa}, author = {Faggembauu, D.}, biburl = {https://www.bibsonomy.org/bibtex/2ae9defec7342a10d3e6d58bdda9ee9a3/procomun}, file = {Faggembauu2006.pdf:Faggembauu2006.pdf:PDF}, interhash = {d06816cf227bd6555ce4356b3015894a}, intrahash = {ae9defec7342a10d3e6d58bdda9ee9a3}, keywords = {advanced analysis and facades numerical of passive systems}, owner = {oscar}, refid = {Faggembauu2006}, school = {Universidad Politecnica de Catalunya}, timestamp = {2011-09-02T08:25:25.000+0200}, title = {Heat Transfer and fluid-dynamics in double and single skin facades}, year = 2006 }