Nasreddine Sakhri

Université Tahri Mohammed Béchar · Faculté de Technologie

The conditioning of living and working spaces in the building sector consumes a significant amount of energy. Among the natural ventilation techniques that rely on renewable energy sources such as geothermal and wind, wind towers and earth to air heat exchangers (EAHEs) hold prominence. This research paper presents a series of experiments conducted...

Recently, building thermal studies have focused more and more on providing the right living conditions inside buildings, houses, schools, hospitals, etc., especially in hot-dry regions to defeat energy consumption dilemmas generally coming from fossil fuels source by renewable energy. In this paper, a field of experiments in actual conditions is co...

Renewable energy means a source of energy which is renewable and without or with less energy consumption as possible. In the case of the earth to air heat exchanger EAHE, we can find EAHE without fan or blower and systems with it according to prevailing winds. In the present paper, an experimental investigation of the possibilities and influences o...

Earth to air heat exchanger EAHE is a renewable technique based on a geothermal source. Arid regions are characterised by hard winter and summer weather conditions, which lead to a large thermal discomfort for the big part of the year. In this paper, we study by experiments the performance of stand-alone earth-to-air heat exchanger without external...

Wind tower (catcher) is an old technique used to provide natural ventilation and thermal comfort in arid regions like Iran, and the Middle East. An attempt is made to improve the performance of such techniques by investigating the effects of the windward wall of a traditional wind tower. Four aerodynamic shapes are studied: circular, triangular, U...

In the present paper, the impact of local climatic conditions on the efficiency of earth-to-air heat exchangers (EAHEs) is investigated by experiments. Four cases of EAHEs were considered: (1) a simple EAHE, (2) an EAHE with solar protection at the upper parts, (3) an EAHE with a chimney effect at the outlet, and (4) an EAHE with a fan at the inlet...

Solar energy is the most renewable energy widely spread on the globe with several applications such as power generation and thermal comfort amelioration inside buildings. In the present study, one of the multiple solar energy techniques is discussed. New, simple and low-cost solar chimney (SC) made of polyvinyl chloride (PVC) tube with internal PVC...

The wind catcher or wind tower is a natural ventilation technique that has been employed in the Middle East region and still until nowadays. The present paper aims to study the effect of the one-sided position of a wind catcher device against the ventilated space or building geometry and its natural ventilation performance. Four models based on the...

Earth-to-air heat exchanger (EAHE) is used for heating and/or cooling of dwelling and buildings in arid regions. In the present paper, experiments are performed to investigate the efficiency of an earth-to-air heat exchanger without external devices (fans, air blowers, etc.). The climatic conditions of the region of Bechar, which is located in the...

Thermal comfort is one of the ancient‐new challenges of the arid region population and responsible for more than 40% of energy end‐use. Renewable energy can be a solution to this problem. In the present paper, the potential of renewable energies to ameliorate thermal comfort and reducing energy consumption in building sectors is experimentally inve...

Arid regions around the world are characterized by hard summer and winter seasons, which leads to thermal discomfort. The southwest of Algeria is classified as an arid region, where the temperature in the summer season passes sometimes 50 °C in the shade and reaches negative values in the winter season. In addition, the yearly relative humidity is...

Aiming to provide the thermal comfort inside building houses in arid regions, an experimental investigation is performed regarding the effect of earth-to-air heat exchanger (EAHE) materials on the overall performances. A comparison is made between the efficiency of steel and PVC pipes. Furthermore, the variation of vertical soil temperature from th...

Natural ventilation is essential for buildings, offices and dwellings occupants’ thermal comfort and good living conditions. Also, for good production in greenhouses. Earth to air heat exchanger is a renewable source based on geothermal energy of the earth. Many working parameters affect earth to air heat exchanger thermal performance were studied:...

Earth to Air Heat Exchanger ETAHE or Air Ground Heat Exchanger (AGHE) is a renewable technique based on geothermal source used for many centuries in arid and desert regions and considered as a principal element of vernacular and traditional architecture. Arid regions are characterized by a severe winter and summer weather conditions leads to a larg...

Heating capacity of an earth to air heat exchanger EAHE equipped with exterior fan in arid region as the South west of Algeria was investigated experimentally. In-situ measurement of annual undisturbed subsoil vertical temperature profile has showed that it was 28 °C at a depth of 1.5 meter. The EAHE made of 66 meters of PVC tube showed a heating c...

Earth to air heat exchanger is a very old technique used 3000 years B.C in arid regions where that was called Qanat. In the present experimental study, the potentials of earth to air heat exchanger to provide thermal comfort for winter weather conditions in South west of Algeria described as arid region are investigated. An EAHE made of 66 meter of...

This work has undertaken a study of the influence of some parameters on the energy balance of a premise located in an arid area. The objective of this study is to calculate the heat of a South facing office record, and study the influence of various parameters such as: glazing, insulation, orientation, building materials and occupants. The system i...

Ground vertical temperature profile at various depths is a major key in designing phase of the use of earth heating and cooling techniques for buildings, offices and greenhouses like earth to air heat exchanger (ETAHE), Earth-Air Tunnel (EAT), Ground Air Collector (GAC) and water Quanat. Annual undisturbed soil temperature is very important paramet...

La ventilation naturelle est un axe principal de l'architecture bioclimatique. La tour à vent est une technique parmi plusieurs techniques de ventilation naturelle sans consommation d'énergie ; ce qui assure la passivité du système et une efficacité énergétique importante. Le présent travail vise à prouver l'efficacité d'une telle technique dans l'...