• MennatAllah Hassan
• Khaled Dewidar
• Mostafa Refaat
• Ashraf Nessim
• Ali Abdelhalim

Nowadays, new commercial building envelopes are seeking to reach sustainable design standards and codes worldwide. However, buildings in hot climates poorly adapt to external environmental conditions. The building envelope plays a major role in the outdoor and indoor environment. An appropriate indoor thermal condition in buildings is important because of the building occupant’s comfort. This paper tests the effect of building envelope using Phase Change Material on the HVAC energy consumption and thermal performance of medium office buildings in Cairo using the Design Builder simulation tool. The model external building envelope is designed according to the Egyptian code and the model building of a medium office on design builder follows the ASHRAE standards. The model building envelope uses the same PCM material in different building allocations to test the effect of PCM on the building envelope on the indoor thermal comfort and energy consumed.

Commercial building envelope, Heat storage, PCM, HVAC consumption, unmet hours, Design builder simulation.

"IMPLEMENTATION OF PCM IN COMMERCIAL BUILDINGS ENVELOPE IN EGYPT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 9, page no.e490-e499, September-2021, Available :http://www.jetir.org/papers/JETIR2109459.pdf

"IMPLEMENTATION OF PCM IN COMMERCIAL BUILDINGS ENVELOPE IN EGYPT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 9, page no. ppe490-e499, September-2021, Available at : http://www.jetir.org/papers/JETIR2109459.pdf