Rached Nciri

Higher Institute of Technological Studies of Gafsa_Tunisia · Department of Mechanical Engineering

This work deals with a numerical investigation of a hydrodynamic–elastic problem within the framework of a double enclosure solar collector technological configuration. The solar collector presents two enclosures separated by an elastic absorber wall. The upper enclosure is filled with air, whereas the lower one is filled with Fe3O4/water nanofluid...

This research article proposes a novel design of solar still; furthermore, it investigates, experimentally, its thermal and productivity performances, as well as its efficiency, under the realistic meteorological conditions of the city of Gafsa, Tunisia (34.4311° N, 8.7757° E), in terms of ambient temperature and solar irradiance. The novel propose...

This work deals with controlling the solar radiation reception rate (SRRR) (ratio of the incident solar radiation on tilted panel to the global incident solar radiation). Controlling the SRRR will permit the amount of the received solar energy on solar panels to be adjusted. This SRRR control is very useful for several technological applications su...

This work studies the flow, the thermal and the hygrometric performances of a novel solar hybrid ventilation-HDH desalination system. The proposed hybrid system as well as its operation is described in detail. The mathematical model of the flow and the heat transfer as well as the mass transfer is elaborated. The ventilation and the hygrometric per...

This work investigates a hydrodynamic problem involving the Fe3O4-Water nanofluid. The novelty of this investigation lies in the fact that the nanofluid free convection is evaluated within a specific rectangular enclosure having a finned absorber plate as the top wall, heated by solar energy. The fins below the absorber plate permit to enhance heat...

This study concerns a numerical investigation of a magnetohydrodynamic (MHD) natural convection of a Fe3O4–water nanofluid filled within a round diagonal corner square cavity. The cavity was subjected to imposed temperatures (hot and cold walls) and one magnetic source. The nanofluid flow and heat transfer problem was mathematically modeled and its...

This paper proposes an original and sustainable design for a Hybrid solar Air Conditioning-Ventilation-Humidification-Dehumidification (HDH) desalination system. The proposed design permits to produce both thermal comfort and desalinated water for residential buildings. The originality of the system design as well as its operating principle is desc...

This work deals with the dimensioning of multi-packed-bed dehumidifiers used in solar air-conditioning systems. An efficient dimensioning methodology is elaborated, explained and visualized by a chart. The proposed methodology permits to ensure an appropriate packed-bed dimensioning based on a compromise between the highest possible amount of heat...

This work proposes an original design for a solar air-conditioning system with adsorption chilling and desiccant dehumidification. The proposed design permits to ensure thermal comfort in residential and office buildings. A detailed technical description is presented. A particular interest is given to the explanation of the operating principle of t...

This work presents a modified solar still with pin fins absorber and external condenser. An experimental comparative study is carried out between the modified solar still with pin fins absorber and condenser, still with pin fins absorber and conventional still. This experimental study is conducted to evaluate the thermal behavior (evolutions of abs...

The work deals with the design and the functioning simulation of a novel solar air-conditioning system. The new design of the system is developed with two key stages: multi-bed dehumidifier system that ensures a regular dehumidification, and an adsorption chiller that increases the energetic performance of the system. Three operation modes (summer...

Over the past decade, the demands for fresh water and energy are growing faster than ever. The use of renewable energy, for seawater and brackish water desalination, is increasing and is currently under the spot light of international conferences. This article presents a theoretical and experimental work performed on a solar still with a pin fins a...

This work deals with the mass and heat transfer of water/silica gel in both adsorption and desorption modes. An original dehumidifier system, based on a circular repetition of several silica gel beds, is proposed as a feasible alternative to the classical dehumidifier systems. Thanks to an appropriate working order ensuring an optimal synchronizati...

This research focuses on the development of new adsorption air conditioning system powered by solar energy. The new system uses humidifier, heat exchanger, rotary desiccant and silica gel/water adsorption chiller. This unit is introduced to allow the production heat or cold with a good indoor air quality, and controls hygrometry. This system is pow...

This paper presents a new conception of air conditioning prototype powered by solar energy. The installation, composed of four compartments, consists of three functioning modes according to the season of the year and the climatic conditions. The summer-mode with precooling of air is studied. Mathematical models based on heat and mass transfer behav...