Surveying the effect of materials’ technique change on school building energy efficiency (Case Study: Isfahan and Shiraz)
Subject Areas : Architecture and urbanism
mehdi rakhshandehroo
1
,
parinaz keshtkaran
2
*
1 - - Department of Architecture, Bey. C., Islamic Azad University, Beyza, Iran.
2 - Department of Architecture, Bey. C., Islamic Azad University, Beyza, Iran. *(Corresponding Author)
Keywords: Reducing energy consumption, Heat transfer, School Architecture, Envelopes retrofitting.,
Abstract :
Background and Objective: The school building is among the most important public buildings, and the matter of energy saving in school buildings is serious because students and teachers spend more than 8 hours of their time in the school buildings during the day. energy consumption in Iran is more than 160 kWh/m2Heat transfer from building envelopes has an important role in the energy saving aspect, and a considerable amount of energy consumption is declined in developed countries by retrofitting the buildings’ envelopes. This article surveyed the effect of retrofitting buildings envelopes of a school in Iran (Shiraz and Isfahan) with the same climate but with a little difference.
Material and Methodology: The quantitative research method is based on the results of calculations of software Energy plus v8-4.0. In this research, two schools with the same plan in two cities of Iran, Shiraz and Isfahan were selected by purposeful improbable sampling method. The school plan was modelled in the software SketchUp 16 and transferred to the software energy plus for calculations. The calculations of heat transfer of the envelopes of the school building were performed based on climate data and used materials from two buildings. Then four techniques: insulation of envelopes, insulation of ceiling, making the horizontal canopy and making double-envelope façade were proposed for retrofitting of envelopes.
Findings: The comparison of results before and after applying retrofit techniques showed that after applying every four techniques in the school building in the city of Isfahan and Shiraz, 60.8 and 48.2 per cent were saved respectively in energy consumption. It also showed that we cannot use the same technique in school building because of the similarity of climate.
Discussion and Conclusion: The roof insulation in Shiraz school and the double -glazed façade technique in Isfahan school, created the greatest energy consumption saving. The lowest amount of energy saving is related to external wall insulation techniques, and south window canopy for Shiraz and Isfahan, respectively
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