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This project provides a reference on how to perform a complete thermal analysis and brings a concrete example using different tools and equations for the estimation of the heating or cooling loads of residential buildings. For this purpose, different methodologies and calculations done by auditing organisms that evaluates how efficient the building is and its state of insulation was used. After determining...
The conventional flat-plate solar collectors that are used in domestic solar water heating systems are often mounted at a fixed position from the horizontal, which makes them less efficient as they do not always face the sun. Adjusting the tilt angle seasonally ensures high energy collection efficiency through different seasons, especially winter, when the sun radiation is limited. The purpose of...
To simplify the fermentationprocess by eliminating the separate saccharificationstep, numerous genetically engineered S. cerevisiaestrains capable of secreting glucoamylase and /or α-amylase have been developed. This work undertakes a different approach to eliminate the saccharificationstep. The culture medium is supplemented with a-amylase and the fermentation of starch to ethanol is done by the...
Gasification is a thermochemical pathway that is use to convert feedstock into combustible syngas (CO and H2). In the following research a computational fluid dynamics study is performed to model the gasification of discrete coal particles stream using air as oxidizer. The main objective of the study is to understand the effect of the oxidizer's velocity on the conversion of coal particle and syngas...
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...
This paper presents an analysis of the heat source effect on the thermal fields of an anode supported planar Solid Oxide Fuel Cell (SOFC). Heat sources are: i) heat source due to the endothermic steam reforming reaction and ii) heat source due to the exothermic water gas shift reaction. This study is studied by a 2-D numerical simulation, in the plane perpendicular to the gases flow, and requires...
The seasonal energy requirements and fuel consumption for heating purposes in the residential buildings in the city of Fez is estimated from the predetermined architectural design and material characteristics of the buildings and the regular meteorological temperature measurements by using the degree-days method. The environmental impact of heating in term of equivalent CO2 emission is also investigated...
In this paper, a control for variable speed Wind Energy Conversion System (WECS) that incorporates a Permanent Magnet Synchronous Generator (PMSG) is described. The proposed approach is based on a Vector Control theory (VC) for regulate of both grid-side and machine converters of a PMSG wind turbine. Then, an optimal control strategy is developed for integrated control of PMSG power extraction. It...
In this study we present our first results concerning the preparation of CZTS thin films using simple and cost effective wet processes on Ti, ITO coated glass and soda lime glass. Cyclic voltammetry and chronoamperometry were used to investigate the mechanism deposition of the films. Structural and optical properties of the deposited films were investigated. The main characteristics of the films were...
In this work, a thermal experimental investigation by Differential Scanning Calorimetry (DSC) of a Portland cement concrete modified with microencapsulated phase change materials labeled “PCM-concrete” is presented. First, the DSC technique was used for the thermal characterization of the micro-PCMs considered in this study. Accordingly, several thermal properties were determined such as the melting...
In this paper, we present an approach for modeling, control and optimization of a photovoltaic pumping system which contains a pv generator, DC-DC boost converter, MPPT controller, DC-AC inverter and a BLDC motor. We use an intelligent control method for searching the maximum power point (MPP). This method uses a fuzzy logic controller applied to a drive a DC-DC converter to an optimal operating point...
The demand for energy is increasing as a result of the growth in both population and industrial development. To improve the energy efficiency, consumers need to be more aware of their energy consumption. In recent years, utilities have started developing new electric energy meters which are known as smart meters. A smart meter is a digital energy meter that measures the consumption of electrical energy...
In this paper we present the simulation study of the ZnO/CdS/CuIn(1−x)GaxSe2/CuIn0.7Ga0.3Se2 cell structure which is consisted of an alternative absorber layers CuIn(1−x)GaxSe2 and CuIn0.7Ga0.3Se2, and cadmium sulfide (CdS) as the n-type buffer layer with an intrinsic zinc oxide (ZnO) as the window layer. The one-dimensional Analysis of Microelectronic and Photonic Structure (AMPS-1D) simulator is...
Morocco gives recently increasing importance to develop renewable energy. In fact, a lot of investment opportunities in the sector of solar thermal energy are offered. To establish this kind of technology, predicting hourly radiation received during an average day of the month is very important. This paper proposes a statistical comparison between measured data of mean hourly global radiation at two...
In recent years, very great research effort have been made to further develop the power engine of electric vehicles and batteries. However, little attention has been paid so far to the fact that charging process for electric vehicles is completely different from refueling process of vehicles that are powered by conventional power engines. One of the major obstacles for the large deployment of electric...
Nowadays, world demand for fossil fuels is rapidly growing which will certainly involve total exhaustion of reserves in the next coming years. In addition, these energies are polluting and are causing climate change currently lived. In the other hand, renewable energy sources are clean, safe and inexhaustible. It has now become essential to develop and promote this type of energy. In this objective...
In this research paper, an attempt has been made to unearth the effects of light intensity and collector surface on the efficiency of a solar thermal collector. Experiments were performed using a solar energy demonstration system (ET 200). This system comports a collector, a storage tank, a high power lamp simulating solar energy and a control and command cabinet. The increase of the light intensity...
This paper deals with the study of the dust characteristics and its effect on the performance of street photovoltaic cells in Baghdad-Iraq. Sample of accumulated dust on the surface of the solar panels at height 26 meters have been microscopy examined with 100x magnification. The results show that, varies in size, shape and disruption. The morphology of dust particles has irregular forms, tends to...
This paper presents algorithms and architecture models for a home energy management system. It's based on customers' behavior that is modeled by a decision-making chain, and smart appliances' use for demand side management. The proposed architecture is scalable and extensible to upper levels of smart grid as the development approach used is bottom-up. Once the model is validated for home use, we can...
This paper presents Multi Objective Optimization for Economic and Environmental Dispatch (EED) problem considering security constraint described by Voltage Profile Index (VPI). The fuzzy set theory is used for the modeling of uncertainties about objective functions in the practical environment of poorly defined data. In the beginning, each objective function is optimized independently with an extraction...
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