Abdelaziz Mimet

Sustainable development of a solar adsorption cooling machine

Purpose – The purpose of this paper is to demonstrate the possibility of the use of a solar adsorption refrigeration machine, using the pair activated carbon/ammonia within the framework of sustainability and development of rural areas.Design/methodology/approach – The limited availability of electrical grid in rural areas of Morocco makes necessary the adoption of new methods in order to provide the needs of energy services, which represent an important factor affecting the quality of life. The studies that were undertaken in this current paper investigated the sensitivity of the COP as well as the production of the cold at various refrigeration machine temperatures.Findings – It can be recognized that the feasibility of the machine with significant production of cold in the form of ice is between 3.33 and 4.14 kg/m2 for a solar flat plate collector; and between 7.16 and 9.94 kg/m2 for solar flat plate.Originality/value – The paper presents a model of decision‐making support for selecting the optimal con...

Thermal energy and economic analysis of a PCM-enhanced household envelope considering different climate zones in Morocco

ABSTRACT This study investigates the thermal energy potentials and economic feasibility of an air-conditioned family household-integrated phase change material (PCM) considering different climate zones in Morocco. A simulation-based optimisation was carried out in order to define the optimal design of a PCM-enhanced household envelope for thermal energy effectiveness and cost-effectiveness of predefined candidate solutions. The optimisation methodology is based on coupling Energyplus® as a dynamic simulation tool and GenOpt® as an optimisation tool. Considering the obtained optimum design strategies, a thermal energy and economic analysis are carried out to investigate PCMs’ integration feasibility in the Moroccan constructions. The results show that the PCM-integrated household envelope allows minimising the cooling/heating thermal energy demand vs. a reference household without PCM. While for the cost-effectiveness optimisation, it has been deduced that the economic feasibility is stilling insufficient under the actual PCM market conditions. The optimal design parameters results are also analysed.

Benefits of production extension and shifting with thermal storage for a 1MW CSP-ORC plant in Morocco

The importance of thermal storage for commercial CSP (concentrated Solar Power) plants has now become obvious, this regardless of the solar technology used and the power cycle. The availability of a storage system to a plant operator brings a lot of possibilities for production management, cash flow optimization and grid stabilizing. In particular, and depending on plant location and local grid strategy, thermal storage can contribute, when wisely used, to control production and adapt it to the demand and / or power unbalances and varying prices. Storage systems design, sizing and configuration are proper to each power plant, hence systems that are now widely installed within large commercial solar plants are not necessarily suited for small scale decentralized production, and will not have the same effects. In this paper the benefits of thermal storage are studied for a 1MWe CSP plant with an ORC (Organic Rankine Cycle), this plant has many specific features which call for a detail analysis about the app...

Potential Sensible Filler Materials Thermal Energy Storage for Medium Range Temperature

The use of filler material (e.g. natural rock, ceramics, sand etc.) in sensible heat storage system is an effective way to store thermal energy, and had the advantage to have low cost compared to the configuration of two tank molten salt. However the choice of suitable filler material is a challenge that is based on several criteria. This present work intent to identify and select cost-effective sensible thermal energy storage (TES) system suitable for medium range temperature (100 °C–300 °C). Based on literature review, the main steps to select potential candidate solid TES as filler material, in direct or indirect with the HTF is developed. The thermal oil is the most adaptable heat transfer fluid in our case. Finally the potential candidate TES material are identified, and would be subjected to laboratory characterizations. In order to select the most successful candidates to be used in prototype scale TES system, installed later in the Green Energy Park (Ben Guerir Morocco).

A thermal storage capacity market for non dispatchable renewable energies

Due to the increasingly high capacity of wind power and solar PV in Germany and some other European countries and the high share of variable renewable energy resources in comparison to fossil and nuclear capacity, a power reserve market structured by auction systems was created to facilitate the exchange of balance power capacities between systems and even grid operators. Morocco has a large potential for both wind and solar energy and is engaged in a program to deploy 2000MW of wind capacity by 2020 and 3000 MW of solar capacity by 2030. Although the competitiveness of wind energy is very strong, it appears clearly that the wind program could be even more ambitious than what it is, especially when compared to the large exploitable potential. On the other hand, heavy investments on concentrated solar power plants equipped with thermal energy storage have triggered a few years ago including the launching of the first part of the Nour Ouarzazate complex, the goal being to reach stable, dispatchable and affo...

Transient thermal analyse of mini heat sink PV cells cooling for hot climate

The mono-crystalline photovoltaic cells are very sensitive to the ambient temperature despite the high conversion efficiency compared to other low-temperature solar cells. To enhance its efficiency we analyse of the Photovoltaic cells under conjugate heat and mass transfer for the active cooling within hot areas climates integration. The major objective of this study was to predict within 2D simulation the heat transfer behaviour of the materials then to optimize the geometry of heat exchanger depending on specified control parameters. Results show that the performance of using mini-channels heat sinks is significant in matter of thermal dissipation and low pressure drops, and the PV efficiency should increase for 8 % relatively to the standard efficiency, but in appropriate design and limitations.

Design and construction of a synchronous wind turbine

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 that we have realized a domestic synchronous wind turbine. In this work, we describe the different components of the wind turbine (blades, generator, rectifier, support, tower, ...). All components are manufactured manually. The generator is based on neodymium permanent magnets. The estimated power of the wind turbine is 700W/h.