âComputational Civil Engineering - "Intersections" International Journal

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“Computational Civil Engineering 2005”, International Symposium 161b) Dumping and phase lagging for different multi-layer elements wascalculated with matrix transfer method (table 2):Table 2 Dumping and phase lagging of multi-layer elementsWall:(layer 1..n)(layer1:internal;; layer nexternal)1. Brick (25 cm)2. B.C. A (15 cm)1. B.C.A. (15 cm)2. Brick (25 cm)1. Reinforced concrete (15 cm)2. Mineral wool (12 cm)1. Brick (25 cm)2. Mineral wool (8 cm)1. Mineral wool (8 cm)2. Brick (25 cm)1. B. C. A. (25 cm)2. Mineral wool (8 cm)1. Mineral wool (8 cm)2. B.C. A. (25 cm)thermophysicalcharacteristicsλ ρW/mK Kg/m 30.70.210.210.71.740.040.70.040.040.70.210.040.040.21160060060016002500401600404016006004040600cKJ/KgK0.870.840.840.870.840.750.870.750.750.870.840.750.750.84Dumpingν[]phaselagging ε(hours)14.015 -9.80338.357 -10.2572.435 7.71475.989 11.1845.488 9.62833.637 11.7665.957 10.0843. CONCLUSIONSThe definitions given in this standard are applicable to any buildingcomponent. The dynamic thermal characteristics defined in this standard can beused in product specifications of complete building components.The dynamic thermal characteristics can also be used in calculation of:- the internal temperature in a room ;- the daily peak power and energy for heating or cooling ;- the effect of intermittent heating or cooling; etc.
162 R. RotbergReferences1. NP 107/7 –2002 Normativ pentru proiectarea la stabilitate termicã a elementelor de închidere aclãdirilor.2. Asanache, Horia - Higrotermica clãdirilor, vol. I, Ed. MATRIX ROM – Bucureşti,1999.3. Roulet, Claude-Alain - Energetique du batiment I, Presses polytechniques romandes, 19874. Chemiller, Pierre – Sciences et batiments, Cours de l’Ecole Nationale de Ponts et Chausses,Paris, 19925. European Standard pr EN ISO 13786 – Thermal performance of building components. DynamicThermal characteristics, Calculation method
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