الفهرس 
صفحة العنوانOnly 14 pages are availabe for public view
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Abstract
umerical and experimental study have been conducted intended for using Phase Change
aterials (PCMs) by incorporating it with the building layers walls. The storage .of
thermal energy is one of the economic ways to achieve a rationalization of energy
on umption in buildings and to ensure comfort conditions. The effect of using phase
change materials on the room structure located in Egypt was studied using the PCM
E ’press modeling and simulation program. The theoretical calculations were based on the
PCM boards were impeded inside tll~e walls. The study showed the importance of using
PCM in the building structure compared to the traditional room due to the thermal
efficiency of these materials and the storage and release of heat energy, which contributes
to reducing thermal loads and good internal comfort conditions. Five different cities were
tudied in Egypt (Cairo, Alexandria, Asyut, Aswan and Suez) and the study concluded
that the city of Alexandria achieved the highest rise in energy saving by 2.59 kWh / day.
The current study also demonstrated the effect of use of PCM with different thicknesses
(5 mm, 10 mm and 15 mm). It is found that the thickness of 15 mm achieved higher
energy saving by 2.34 kWh / day. Walls orientation (East, North, South, and West) were
al 0 studied, and it is found that the south wall achieved higher energy saving by 1.92
kW/m) day. Different PCM types were studied (Paraffin PCM, fatty acid PCM and
hydrated salts PCM) and it is concluded that the higher energy saving was achieved by the
values of2.1 kWh / day, 1.7 kWh / day, 0.6 kWh / day for Paraffin PC M, fatty acid PCM,
and hydrated salt PCM respectively. The conditions of internal comfort for the study
rooms obtained the highest average increase in annual comfort temperature and energy
aving by same percentage 38.9%. The effect of involving PCM volume ratio and
orientation on the thermal efficiency and thermal comfort was experimentally studied.
’I wo identical rooms models have been constructed. The first model was used as a
reference room without using PCM and the second model has the PCM layers and used
for all experimental testing works. Both rooms are installed at National Research Center.