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Accueil du site → Doctorat → Royaume-Uni → 1994 → Thermal mass and stabilized soil blocks for achieving energy savings in hot dry arid climate of Ar-Riyadh region.

University of Reading (1994)

Thermal mass and stabilized soil blocks for achieving energy savings in hot dry arid climate of Ar-Riyadh region.

Al-Ajlan, Saleh Abdulrahman

Titre : Thermal mass and stabilized soil blocks for achieving energy savings in hot dry arid climate of Ar-Riyadh region.

Auteur : Al-Ajlan, Saleh Abdulrahman

Université de soutenance : University of Reading

Grade : Doctor of Philosophy (Ph.D.) : 1994

The aim of this research was to find the most suitable, applicable, and effective passive strategy accompanied by developing an appropriate building material to satisfy that strategy in order in the end to stabilize or even reduce the electricity demand in a hot-arid region such as Ar-Riyadh. The first step taken to achieve this aim was to study and analyze the outdoor climatic conditions of the selected region. This has been followed by studying and drawing out lessons from traditional building designs and materials and comparing the traditional buildings with the contemporary ones in terms of energy design and the contribution of selecting the material to the energy saving. Then bioclimatic approach to building designin Ar-Riyadh has taken place to select the most effective passive technique which has been found to be the thermal mass. The satisfy the suitable passive strategy, appropriate material has been suggested which is the soil. The next step was to analyze the soil which has been fetched from Ar-Riyadh to find out the most effective soil stabilizer followed by conducting strength and durability experiment works for different samples (samples were made on an ELEPHANT blockmaker with effective compaction pressure of 10 MN/m2) of stabilized soil blocks in order to make sure that the suggested material is durable and strong enough to build with. The block of soil with 8&#37 cement (as stabilizer) has appeared as the optimized and ideal block to build with in Ar-Riyadh region. Economical evaluation and comparisons of energy required for manufacturing stabilized soil blocks and other building materials were investigated. The emphasis then was to study the thermal behaviour of the selected sample. This has been achieved by : (i) conducting experimental works on the thermophysical properties of the developed material such as thermal conductivity and specific heat capacity. Factors affecting the thermal conductivity (moisture content, porosity, density, permeability, and average temperature across the material) of stabilized soil blocks are specified.(ii) by establishing a mathematical model (using the finite-difference method) in spread sheet program format to anayze the thermal performance of the suggested material using the values obtained from the experimental work. It has been taken into account in the mathematical model to compare the suggested material with other building materials available in Ar-Riyadh region such as reinforced concrete, solid cement block, and hollow cement block.

Mots clés : Passive solar design Energy conservation Energy conservation Building materials Construction equipment Thermodynamics Energy conservation Building materials Thermodynamics

Annonce : EThOS (UK)

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