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••• Plea


PLEA 2008
Analyzing environmental performance of AAC blocks, strawbales and mud-plaster in hybrid wall construction
by Soofia Tahira Elias-Özkan, Françoise Summers, Tuğrul Karagüzel and Özün Taner.
This aim of this study was to compare the thermal performance of three buildings which are located at the Kerkenes Eco-center in Yozgat, Turkey. The first of these was constructed with strawbales rendered with mud plaster; the second with aerated autoclaved concrete (AAC) blocks and cement plaster; and the third with strawbales rendered with mud plaster inside and a layer of thin AAC blocks on the outside. The last type of hybrid wall construction has been tried for the first time, in order to take advantage of the thermal-insulation property of straw, combined with the humidity-regulating property of mud plaster inside and weatherresistance property of AAC outside. Temperature and humidity data were collected in these three buildings for certain time periods, concurrently. These data have been compared to elicit the degree of variance in the performance of the three types of constructions. Additionally, computer models of these buildings have also been simulated with Ecotect v5.5 for a comparison of their total energy loads.

PLEA 2006
A Comparative Study of the Thermal Performance of Building Materials
by Soofia Tahira Elias-Özkan, Françoise Summers, Neşen Sürmeli and Simos Yannas.
This study focuses on the environmental performance of a selection of buildings in the typical Central Anatolian village of Şahmuratli in Turkey. The objective was to search for affordable and energy-efficient construction techniques suitable for rural settlements and incorporating traditional cultural values in a semi-arid upland region characterised by long severe winters and hot, dry summers. This was pursued by analysing temperature and humidity measurements within buildings constructed from a variety of traditional and modern materials. The thermal behaviour and comfort, the patterns of energy use and the appropriateness of the different building techniques and materials are analysed, compared and discussed. Aspects of this ongoing study, initiated by a British Council Partnership Programme, are presented in this paper which focuses on a traditional mudbrick structure, a straw bale house and an aerated concrete building. We demonstrate how a building envelope reacts to outdoor conditions through graphic illustration and show ways in which the research can be extended by the creation of simulations using Ecotect software. This research contributes to the promotion of passive and low energy architecture towards a sustainable future.

PLEA 2003
Comparative Studies of Traditional and Contemporary Construction in Turkey
by Françoise Summers, Nevin Gezer, Ömer Tuğrul Karagüzel, Simos Yannas, Yasemin Somuncu
The paper will report on the findings of a study of comparative thermal performance of buildings of traditional and contemporary construction in the Central Anatolia region of Turkey. The study combined short-term temperature and humidity measurements with a series of parametric studies using a computer simulation model. Measurements were taken in four single-storey, detached buildings in the village of Sahmuratli in Yozgat, Central Anatolia (latitude 40N). The climate of the region is characterised by cold winters and warm summers. Winter temperatures are near or below freezing in December and January. In summer, outdoor air temperatures rise to peaks above 30C in July and August, and display a considerable daily fluctuation. Thus for summer, in addition to solar control, this climatic profile suggests the need for high thermal capacity in the building structure, acting as interim heat sink, with night-time ventilation or radiative cooling as the permanent heat dissipation mechanisms. In winter thermal insulation is clearly the critical parameter so that solar and internal gains can lead to meaningful temperature rises whilst the thermal capacity of the structure controls temperature fluctuations.