Thermal Behavior Analysis of the External Shell of Buildings Constructed with Traditional and Modern Materials and Execution Technologies for Energy Consumption Optimization; Case Study: Residential Buildings in Mashhad City

Madahi, Seyed Mehdi; Abbasi, Mahsa

doi:10.22034/aaud.2020.102374

Thermal Behavior Analysis of the External Shell of Buildings Constructed with Traditional and Modern Materials and Execution Technologies for Energy Consumption Optimization; Case Study: Residential Buildings in Mashhad City

Document Type : Original Article

Authors

Seyed Mehdi Madahi ¹

Mahsa Abbasi ²

¹ Assistant Professor of Architecture, Department of Architecture, School of Architecture and Urban Planning, Khavaran Institute of Higher Education, Mashhad, Iran

² M.A. of Architecture, School of Architecture and Urban Planning, Khavaran Institute of Higher Education, Mashhad, Iran

10.22034/aaud.2020.102374

Abstract

Energy saving is one of the key challenges in the world. In recent years, there have been many concerns about the environmental consequences of energy consumption. In Iran, the building sector accounts for about 40% of total energy consumption. The building shell plays an essential role in controlling environmental conditions as the primary intermediary between the indoor and outdoor. The current study aims to investigate the thermal behavior of external walls of buildings in Mashhad city. The present study is carried out using a combined research and the external walls common in Mashhad city are identified through field studies and then, simulated in Design Builder software. Additionally, several new external walls, which are limited in terms of execution in Mashhad, are studied. The results show that among various external walls common in Mashhad City, HCB1 (a wall with 15cm clay block) is the weakest wall in terms of thermal response and A2 (a wall with 10cm ACC block and polystyrene insulation) is the most optimal wall in terms of thermal energy saving (. Using A2 wall will save 50% of total thermal load and 73% of heat loss through wall. However, the L2 wall (A wall with 10cm Leca block and polystyrene insulation) performs better in cold seasons because it prevents the exit of indoor heat due to its higher admittance coefficient, resulting in less energy required to meet building heating need, compared to other walls. Also, on the implementation of the dry facade system of the walls, it can be seen that implementing dry facade will reduce the total thermal load and heat loss through walls

Keywords

Thermal Comfort

Energy Saving

External Walls

Building Shell

Mashhad City

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