Konferensartikel

Ventilated Illuminating Wall (VIW): Natural Ventilation Numerical Analysis and Comparison with Experimental Results

P. Zazzini
D.S.S.A.R.R., Faculty of Architecture University “G. D’Annunzio”, Pescara , Italy

O. Boccia
D.S.S.A.R.R., Faculty of Architecture University “G. D’Annunzio”, Pescara , Italy

F. Chella
D.S.S.A.R.R., Faculty of Architecture University “G. D’Annunzio”, Pescara , Italy

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110571930

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:25, s. 1930-1937

Visa mer +

Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)

Abstract

The authors propose a comparison among the first experimental and numerical results of an analysis carried out about the theme of the natural ventilation and the energy efficiency relatively to a device called Ventilated Illuminating Wall (VIW). The VIW is represented by a 1:1 prototype scale model; constituted by a precast removable manufactured product set to a window of the room; able both to transport the natural light; captured by the coverage; in underground area; and to introduce outside air for the required indoor ventilation. The experimental data; object of a work previously carried out; are obtained from temperature and air speed measurements in different points inside the tested room.

Based on some meaningful environmental parameters; internal and external temperature of the building; direction and wind speed in different times of the year; the device performances are evaluated through the software Fluent/Airpak; able to make fluid dynamics modeling and simulations; with the aim to calculate the air flow rate distributions; air speed and temperature field inside the room. The numerical analysis is carried out in steady state condition and produces results that; sometimes; are overestimated with respect to experimental ones. The results may be improved by a transient analysis.

Nyckelord

Ventilated illuminating wall; Natural ventilation; Energy efficiency; Thermal comfort; CFD

Referenser

[1] M. Santamouris; Alternative cooling techniques for building (Keynote lecture); Proceedings of the 6th International Conference on Sustainable Energy Technologies SET 2007; Santiago de Chile; 2007; pp. 19-24.

[2] C. Baroncini; F. Chella; P. Zazzini; Numerical and experimental analysis of the Double Light Pipe; a new system for daylight distribution in interior spaces; International Journal of Low Carbon Technologies; 3/2; 2008; pp.110-125. doi: 10.1093/ijlct/3.2.110.

[3] C. Baroncini; O. Boccia; F. Chella; P. Zazzini; Experimental analysis on a 1:2 scale model of the Double Light Pipe; an innovative technological device for daylight transmission; Sola Energy; 84; 2010; pp.296-307. doi: 10.1016/j.solener.2009.11.011.

[4] S. Varga; A. C. Oliveira; Ventilation terminal for use with light pipes in buildings; Applied Thermal Engineering 20; 2000; 1743-1752. doi: 10.1016/S1359-4311(00)00005-3.

[5] A. C. Oliveira; A. R. Silva; C. F. Afonso; S. Varga; Experimental and numerical analysis of natural ventilation with combined light-vent pipes; Applied Thermal Engineering 21; 2001; 1925-1936. doi: 10.1016/S1359-4311(01)00053-9.

[6] F. M. White; Fluid Mechamics; 2nd ed. McGraw Hill; New York; 1986.

[7] S. V. Patankar. Numerical Heat Transfer and Fluid Flow. Hemisphere; Washington D.C.; 1980

[8] Airpak 2.1 User’s Guid Fluent Inc. April 2002.

[9] B.E. Launder; D.B. Spalding; The numerical computation of turbulent flows; Computational Method. Applied Mechanical Engineering; 3 (1974) 313. doi: 10.1016/0045-7825(74)90029-2.

[10] P.V. Nielsen; F. Allard; H.B. Awbi; L. Davidson; A. Schalin; Fluidodinamica computazionale applicata alla progettazione della ventilazione ed. D. Flaccovio 2009.

Citeringar i Crossref