Fatima Ait Nouh - Academia.edu (original) (raw)

Papers by Fatima Ait Nouh

The Sana'a Basin is located in central highlands of Yemen. This basin is characterized by wat... more The Sana'a Basin is located in central highlands of Yemen. This basin is characterized by water crisis due to arid climate with low rainfall (170 mm/year), and drawdown of piezometric levels. Promoting water reuse of treated wastewater for irrigation could mitigate this water crisis. This study assesses the performance of Wastewater Treatment Plant (WWTP) by activated sludge of Sana'a City by analyzing the quality raw and treated wastewater predominantly by domestic sewage. A comparison with Yemen and international guideline reveals the results of pH, EC and PO4 show that the effluent from SWWTP are in admissible standard limit for irrigation. But, the others parameters such as BOD, COD, NH4, TSS, phenols and heavy metals are very high than the standard values due to the overloaded of SWWTP. The added of facultative ponds can improve the performance of this station. Therefore, the quality of final effluent will be better.

Perspectives, Science and Technologies for Novel Silicon on Insulator Devices, 2000

This paper provides a modeling technique for coplanar transmission lines implemented on SOI techn... more This paper provides a modeling technique for coplanar transmission lines implemented on SOI technologies with substrates of various conductivity values especially dedicated to RF design. The model is verified by S-parameter measurements from 45 MHz up to 10 GHz, which clearly proves that such SOI structures can be accurately modelled using a standard analytical approach.

Journal of Radioanalytical and Nuclear Chemistry - J RADIOANAL NUCL CHEM, 2001

Uranium and thorium contents were determined in samples of various plants in the soils in which t... more Uranium and thorium contents were determined in samples of various plants in the soils in which the plants were grown, and in herbal infusions made by boiling the plants in potable water, using CR-39 and LR-115 solid state nuclear track detectors. In addition, radon and thoron alpha-activities per unit volume inside the plants, soils and herbal infusions were measured. These measurements were completed by an investigation of the radon transfer between soils and plants and that between plants and herbal infusions, and also by the investigation of the influence of pollution due to different material dusts on the radon and thoron alpha activities inside the plants and their infusions.

Uranium and thorium contents were evaluated in water samples collected from different sources of ... more Uranium and thorium contents were evaluated in water samples collected from different sources of the piedmont of the Middle Atlas mountains by using two types of solid state nuclear track detectors (SSNTD). In addition, the radon (222Rn) and thoron (220Rn) -activities per unit volume of the water samples were also determined. The influence of the water flow rate and altitude

Construction and Building Materials, 2013

h i g h l i g h t s The influence of moisture content on the thermal proprieties of wood-concrete... more h i g h l i g h t s The influence of moisture content on the thermal proprieties of wood-concrete is studied. Lightening the concrete by wood shavings increases its thermal insulation capacity. Thermal conductivity increases rapidly with water content. Thermal diffusivity presents a maximum corresponding to a water content value W m. The values of thermal diffusivity depend on the used counting model.

This paper deals with fabrication and thermomechanical characterization of energy efficient compo... more This paper deals with fabrication and thermomechanical characterization of energy efficient composite materials of mortar reinforced by date palm fibers (DPF) from Marrakech. The weight percentage of the fibers in the cement varies from 0% to 7%. The device EI700 of steady state and the device "Microcomputer controlled electronic universal testing machine" have been used respectively for thermophysical and mechanical characterization. The effects of the incorporation of the DPF and the water content on the thermomechanical proprieties have also been studied. The results show that the DPF have a positive effect on the thermal conductivity and flexural strength of the composite materials.

The purpose of this research is to assess the thermal performance of a classroom in hot semi-arid... more The purpose of this research is to assess the thermal performance of a classroom in hot semi-arid climate of Marrakech (Morocco). The studied case building combines the effect of high thermal mass of rammed earth walls and roof insulation with reed panels. In order to evaluate the thermal behavior of this classroom, a study was carried out using a dynamic thermal simulation in TRNsys18 software over a typical year. Then compared with a case lacking the considered materials and built with regular classic ones. The simulation model was validated by the monitoring results. It was found that the considered techniques have a remarkable effect on the annual thermal loads as well as the indoor air temperature especially in summer season. The total thermal loads were reduced by 44% compared to standard case. On the other hand, the daily average indoor air temperature is reduced by up to 5°C during the hottest day of the month (July). In contrast, during winter season a slight difference was found between the two cases, as the average monthly indoor air temperature was 16.8°C for standard case while 17.3°C for the other case.

Environmental Science and Pollution Research, Nov 30, 2021

The solar energy produced by Scheffler parabola (10 m2) is not fully exploited by the solar disti... more The solar energy produced by Scheffler parabola (10 m2) is not fully exploited by the solar distillation system of aromatic and medicinal plants. In this work, the optical losses in the primary and secondary reflectors, and the thermal losses at each part of this system (solar still, steam line, condenser) were determined. A thermal energetic and exergetic analysis were also performed for a solar distillation system of rosemary leaves. For average intensity radiation of 849.1W/m2 and 6 Kg of rosemary leaves during 4 h of distillation, exergy and optical efficiencies of the system achieved up to 26.62% and 50.97%, respectively. The thermal efficiency of the solar still, steam line, and condenser is about 94.80%, 94.30%, and 87.76%, respectively. The essential oil yield per unit of consumed energy and the total efficiency of the solar distillation system, taking into account the heat losses in the solar still, steam line, and condenser, as well as the optical losses in the two reflectors, is 6.18 mL/ kWh and 40.00%, respectively. The efficiency can be as high as 42.42 % if the steam line is insulated. Moreover, the comparison between the solar steam distillation and conventional steam distillation shows that solar distillation is much more efficient since it gives better results and especially it avoids the emission of 12.10 kg of CO2 during extraction.

ABSTRACT In Morocco, the construction sector is the largest consumer of energy. Reducing the ener... more ABSTRACT In Morocco, the construction sector is the largest consumer of energy. Reducing the energy consumption in buildings represents a major economic and ecological issue. The building sector has the highest potential for improving energy efficiency which concerns, among other the choice of appropriate materials and improvement of their thermal characteristics. The present work deals with measurement methods and characterization of thermophysical proprieties of building materials. Primary results of measurement of thermal proprieties of extruded polystyrene, expanded polystyrene, soil, gypsum and marble are presented. The measurements were carried out using two devices available at the National Centre for Studies and Researches on Water and Energy (CNEREE) at Marrakech. The two devices EI700 and FP2C use respectively the boxes method and the method of the hot plan and hot wire.

2017 International Renewable and Sustainable Energy Conference (IRSEC)

This paper presents the results of monitoring the performance of a hybrid system consisting of a ... more This paper presents the results of monitoring the performance of a hybrid system consisting of a micro-CSP and a biomass boiler for water and space heating of a Hammam (traditional bath). The biomass boiler was used in order to overcome the intermittency of solar energy, and to ensure a continuous supply of hot water and heat especially in periods of high demand. Local agricultural residues (olive pomace, shells of walnuts, almonds, Argan…) can be used as the biomass feed. Underfloor heating made from either copper or PEX tubing was used for space heating. The monitoring results show that the hammam is heavily used after 19:00 with an average consumption of 523 kg/day of olive pomace, and that the system has a high thermal inertia.

Building Services Engineering Research and Technology

The present work aims to optimize the thermal behavior of a building envelope by combining sensit... more The present work aims to optimize the thermal behavior of a building envelope by combining sensitivity analysis (SA) and multi-objective optimization (MOO). An existing classroom located in Marrakech city was considered a case study building. The building model was analyzed under six Moroccan climate zones. The SA was applied on 16 design variables and performed using the Morris method implemented in the tool Simlab to rank each design variable based on its influence on the objective function (overall energy demand). The SA results showed that the solar absorptance of the internal roof, wall, and ground floor and the ground hollow core slab thickness impacted less the overall energy demand. Therefore, the only remaining variables showing the most relevant effect will be optimized afterward. The optimization phase was conducted by coupling the generic optimization tool GenOpt with TRNSYS. The optimum solution was selected based on the Pareto front approach. The obtained results asses...

Proceedings of the Institution of Civil Engineers - Energy

This study highlights the indoor thermal comfort in a classroom building mostly built with locall... more This study highlights the indoor thermal comfort in a classroom building mostly built with locally available construction materials combined with some passive techniques in the hot semi-arid climate of Marrakech, Morocco. The thermal assessment of this so-called Baterre building was analysed against a typical building (TB), which represents the structure most widely used in Moroccan rural classrooms and is constructed with conventional materials. A TRNSYS-based dynamic model was developed and validated using onsite monitoring measurements according to American Society of Heating, Refrigerating and Air-Conditioning Engineers (Ashrae) guideline 14. Simulation results show that the Baterre structure has a noticeable positive effect on indoor thermal comfort since its indoor air temperature remains stable while that of the TB classroom has higher oscillations. The hourly calculated indoor air temperature in Baterre is greater by 3.6°C during winter and lower by 9.54°C during summer than...

2021 9th International Renewable and Sustainable Energy Conference (IRSEC), 2021

The purpose of this paper is to optimize the thermal performance of buildings in the hot semi-ari... more The purpose of this paper is to optimize the thermal performance of buildings in the hot semi-arid climate of Marrakech, Morocco. An actual building is adopted as a case study, and it is designated as a classroom building. Therefore, the total discomfort hours TDh during the full occupied hours is chosen as the objective function to be minimized. TDh is simulated using the building performance simulation program TRNsys coupled with the generic optimization tool GenOpt. A set of design variables (continuous, discrete) is selected to assess their influence on the objective function and to find their optimal set for the studied building and under the considered climatic condition. The results show that the optimization led to a reduction of the annual thermal discomfort index TDI from 51% in the case of the original design building to 31% by using the resulting optimal set of design variables.

2019 7th International Renewable and Sustainable Energy Conference (IRSEC), 2019

Improving the behavior of earthen construction materials is one of the subjects of concern to man... more Improving the behavior of earthen construction materials is one of the subjects of concern to many researchers. Stabilization by organic elements is a solution to consider. This work consists at studying effect of adding organic load based on the powder of argan nut shell (PANS) on mechanical and thermal behavior of compressed earth blocks (CEB). Three load contents are tested; 2, 4 and 6% with a chemical stabilization by adding 5% of cement. Measurements include conductivity and thermal resistance, water absorption, tensile and compressive strength. The results show a considerable improvement in the physical and thermal properties of the loaded CEB and an increase of mechanical strengths in the presence of cement.

AMT2020: THE 6TH INTERNATIONAL CONGRESS ON THERMAL SCIENCES, 2021

Numerical predictive model based on the equations of conservation of energy and moisture was deve... more Numerical predictive model based on the equations of conservation of energy and moisture was developed to investigate the performance of drying sewage sludge under greenhouse. The results show that drying efficiency is prodigious using greenhouse and the main parameters affecting drying efficiency are solar radiations and ambient temperature.

The solar energy produced by Scheffler parabola (10 m2), is not fully exploited by solar distilla... more The solar energy produced by Scheffler parabola (10 m2), is not fully exploited by solar distillation system of Aromatic and Medicinal Plants. In this work, the optical losses in the primary and secondary reflectors, and the thermal losses at each part of this system (distillation still, steam line, condenser) were determined. A thermal energetic and exergetic analysis was also performed for a solar system distillation of rosemary leaves. For average intensity radiation of 849.1W/m2 and 6 Kg of rosemary leaves during 4 hours of distillation, exergy and optical efficiencies of the system achieved up to 26.62% and 50.97%, respectively. The thermal efficiency of the still, steam line and condenser is about 94.80%, 93.08%, and 87.76%, respectively. Total efficiency of the solar distillation system, taking into account the heat losses in the still, steam line, and condenser, as well as the optical losses in the two reflectors, is 39.49%. The efficiency can be as high as 42.42% and if the...

Digital Technologies and Applications, 2021

Traditional hammams are big consumers of wood-energy and water. This work presents a hybrid micro... more Traditional hammams are big consumers of wood-energy and water. This work presents a hybrid micro-csp/biomass system for space heating and hot water production in traditional baths that enables to offset the wood that is inefficient used in such baths. In addition, energy efficiency of these baths is enhanced through an optimal control system. Furthermore, the use of local agricultural residues instead of wood all contribute to reducing the stress on forests. The system to monitor and control the consumption of hot water and energy is presented. The data can be locally stored and transferred through internet, together with system faults. Preliminary test of the micro-csp showed that the maximum temperature achieved at the outlet of the parabolic trough system was 41.7 ℃ while at the bottom of the storage tank it was 34.4 ℃ corresponding to a 8.7 ℃ increase even though water was withdrawn by users. Space heating and hot water production are decoupled which allows to stabilize the hot...