Hery Tiana RakotondramiaranaUniversity of Antananarivo · Institute for the Management of Energy (IME)
Hery Tiana Rakotondramiarana
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Publications (47)
Developed and crafted in Madagascar, the Raseta pump is a novel hydraulic ram (hydram) pump using a springs system. It operates differently from other pumps by the exclusive use of water energy due to the water hammer phenomenon induced by the sudden stop of the water flow. The present study initiates the investigation of the environmental impacts...
One of the virtues of watercress is its ability to grow in wastewater. This work aims at experimentally studying the thermal behavior of a watercress planted roofed cubic cell. To do this, the temperatures of various components of the cell and the solar radiation received by this cell were measured in order to compare the watercress roof performanc...
In the ylang-ylang essential oil distillers in Anjouan Island, the used
energy is 100% firewood biomass. A large amount of this energy is
dissipated in the environment just in the combustion chamber itself. As
it turns out, the flue gases in this process take away the most part of it.
Thus, in a process of energy efficiency of stills, the present w...
Water pumps, which usually require fuels or power, are for carrying water from water sources to a facility, generally a household or a farm in the countryside. The present study consists of conducting an experimental validation of a mathematical model that was developed in a previous work for simulating the functioning of a new form of the hydrauli...
Due to their polluting characteristics, fossil fuels presently tend to be replaced by renewable energy resources. Anaerobic digestion is a recent technology for producing biofuels. As a biochemical method to produce biogas, it is more environmentally friendly than other processes and is almost non-polluting. The anaerobic co-digestion is an upgrade...
Les petits paysannats malgaches préfèrent encore sécher leurs produits à l’air libre
qu’utiliser les séchoirs sur lesquels nombreux travaux de recherche ont pourtant été
menés à Madagascar depuis les années 80. Dans le dessein de proposer aux
paysans un système de séchage simple d’utilisation et utilisant également l’énergie
solaire à l’instar du s...
Oil extraction represents an important investment and the control of a rational exploitation of a field means mastering various scientific techniques including the understanding of the dynamics of fluids in place. This paper presents a theoretical investigation of the dynamic behavior of an oil reservoir during its exploitation. More exactly, the m...
A Gasifier system that can generate electricity from waste (biomass). The general components of this system include a boiler for burning the biomass to be gasified, the cyclone; for cooling the so-obtained syngas and for filtering the solid particles present within it; and finally, the electricity generator itself. All the subsystems are interconne...
The first part of this work is focused on the determination of the Biochemical Methane Potential (BMP) of a wide range of substrates that are largely available in Madagascar in order to determine the amount of methane (CH 4) that could be produced from their treatment (by monodigestion and by co-digestion) in an anaerobic reactor. Then a simple and...
In this article, a study of the energy performance of a distillation system of ylang-ylang essential oil on a wood fire was carried out. To do this, an analysis using the first and the second law of thermodynamics was made for each component of the distillation system. The analysis showed that the energy efficiency depends on the fraction of oil to...
-A very large number of buildings in developing countries are far from complying with the standards of housing. This paper presents the subjective study of the thermal comfort of a building that does not comply with construction standards or thermal regulations, located in Madagascar. Modeling was done using the Modelica tool, especially its BuildS...
A very large number of buildings in developing countries are far from complying with the standards of housing. This paper presents the subjective study of the thermal comfort of a building that does not comply with construction standards or thermal regulations, located in Madagascar. Modeling was done using the Modelica tool, especially its BuildSy...
A new type of hydraulic ram pump, called "Raseta pump", was invented, patented and crafted in Madagascar. The peculiarity of this hydram pump over conventional ones is that there is a spring in each of the waste and delivery valves. In addition, the usual air balloon is replaced by a balloon with 4 springs. Thus, this paper aims at theoretically st...
Jatropha curcas oil is one of the most promising renewable energy sources for rural areas due to its ease of production, which can be used as an alternative to diesel and fuel oil. The development of sustainable energy has been the issue of the discussion about biofuel production given the considerable consumption amount of fossil fuel during the t...
Compte tenu des besoins actuels en termes de confort à l'intérieur d'un bâtiment et d'économie d'énergie, le présent travail étudie l'influence de la température sur le confort thermique au niveau d'un habitat. Pour ce faire, les données de températures intérieures d'une cellule expérimentale, sise à Antananarivo, ont été prélevées pour ensuite êtr...
Housing projects design in cities should be based on an understanding of the urban local climate; selection of fit-to-purpose thermal comfort models and implementation corresponding design guidelines and best practices. In this context, we developed an analysis tool for bioclimatic design recommendations for architects in Madagascar. The aim of thi...
French : Dispositif pour produire du biogaz à partir de la digestion anaérobie des déchets organiques.
L’invention concerne un dispositif modulaire facilitant son transport vers les lieux d'assemblage et permettant de produire, de stocker et de distribuer du biogaz. Ledit dispositif est constitué de trois éléments principaux : des digesteurs jumelé...
Rural electrification remains a great challenge for Sub-Saharan Africa (SSA) as access to electricity is a prerequisite to accelerate its development. The present paper reviews the measures adopted to promote access to electricity in rural and remote areas of SSA. The main barriers to rural electrification in these developing countries are presente...
Production of syngas, or synthesis gas, from biomass wastes is an advantageous option for fuelling power generator. The most common components of a small-scale power generator system running with syngas are the boiler which gasifies the biomass, the cyclone which cools the output syngas and filters the solid particles, and the electricity generator...
It is known that the Universe also contain many other planetary systems which are different from our Solar system in terms of host star, number and natures of orbiting planets. The present paper aims at reviewing works done for observing exoplanets. For that purpose, detection technologies and methods are specified first. Then, different possibilit...
![Figure 3 : Un outil multifonctionnel : le métamodèle [17]](profile/Hery-Rakotondramiarana/publication/321882987/figure/fig3/AS:572938399502336@1513610567774/Un-outil-multifonctionnel-le-metamodele-17_Q320.jpg)
Cet article porte sur la mise en place d'un outil de modélisation et de simulation énergétique du bâtiment, nommé ATOMO, afin de prédire son comportement dynamique ainsi que sa consommation d'énergie de manière plus simple et plus rapide. Dans le présent travail, le coeur de l'outil est la modélisation dynamique du bâtiment et se base essentielleme...
![Figure 1 : Schéma descriptif d'une toiture végétalisée [7]](profile/Hery-Rakotondramiarana/publication/321883319/figure/fig1/AS:572939373170699@1513610799553/Schema-descriptif-dune-toiture-vegetalisee-7_Q320.jpg)
Cet article a pour objectif l'étude de la performance énergétique des bâtiments revêtus d'une toiture végétalisée. Les méthodes numériques de discrétisation, d'adimentionalisation, ainsi que le double balayage ont été utilisées afin de pouvoir mettre en place un code de calcul adapté à la résolution du système régissant les différents transferts au...
De nos jours, la protection de l’environnement est un défi international. Le toit vert est l’un des concepts innovants pour faire face à cette bataille. On observe une augmentation de son utilisation dans les zones urbaines à travers le monde. Mais une question se pose : quelles sont les conséquences sur l’environnement du cycle de vie du toit vert...
Le Bilan Energétique de La Réunion montre que cette île est actuellement dépendante en énergie fossile notamment l’huile lourde et ses dérivées. L’objectif du présent travail est de contribuer à l’atteinte de son indépendance énergétique à l’horizon 2030 en identifiant les facteurs influents et en proposant des alternatives adéquates. Pour ce faire...
Abstract Climate change is the greatest challenge of our time for development. Adaptation to this change combined with the reduction of greenhouse gas emissions can help to boost the economic transformation which stimulates growth, fills the energy gap and reduces poverty. This paper focuses on the potential of renewable energy sources (RES) for el...
Environmental protection becomes a global challenge currently. Green roof is one of the innovative
concepts to face this battle. An increase in its use is noticed in urban areas worldwide. But a question arises: what are the environmental consequences of the green roofs’ life cycle? In this paper, the environmental performance of two complete syste...
The process of power production with a pico-hydropower plant located in Andriantsemboka Antananarivo was analyzed using the methods of exergy analysis and global sensitivity analysis. The objectives of the present investigation are first, to pinpoint the locations and amounts of exergy losses by identifying and observing the exergy efficiency of th...
![Fig. 2. Comparaison des données expérimentales [20] avec les résultats...](profile/Hery-Rakotondramiarana/publication/320352878/figure/fig2/AS:550433405050885@1508244958497/Comparaison-des-donnees-experimentales-20-avec-les-resultats-predits-sur-lefficacite_Q320.jpg)
Cette étude s’est focalisée sur l’opportunité de l’utilisation des ressources renouvelables, comme le bois, dans le domaine énergétique. La modélisation de chaque étape de transformation de l’énergie des résidus bois en électricité est présentée : transformation du bois en gaz de synthèse par le biais d’un gazogène – conversion de l’énergie calorif...
Anaerobic digestion is a technique of treatment and valorization of various organic wastes with several advantages: reduction of environmental harmful effects, production of biogas and organic fertilizer. The present work is an experimental study of the co-digestion of mixture of several organic wastes by using 6 units of metallic digesters. It fol...
Solar energy is a green and attractive renewable energy source that can be converted for power generation. The objective of this work is to evaluate the potential of dish Stirling systems if they are used in the fourth worldwide largest island of Madagascar. For that purpose, a theoretical model of the dish Stirling system based on the geometrical...
Solar energy is a green and attractive renewable energy source that can be converted for power generation. The objective of this work is to evaluate the potential of dish Stirling systems if they are used in the fourth worldwide largest island of Madagascar. For that purpose, a theoretical model of the dish Stirling system based on the geometrical...
Green roofs improve building energy performance and constitute an alternative to sustainable buildings. A green roof model is dynamically coupled with a building thermal model to assess its energy performance that takes into account the indoor air temperature dynamic changes. Under the climate conditions in Antananarivo, we compared green and conve...
Energy saving is a significant feature to take in account in the choice of renewable energy technologies to use. This paper techno-economically investigates an excess heat recovery system that is proposed to be installed in a thermal cure center geothermal source for producing domestic hot water to be conveyed through piping to a nearby three star...
A green roof is an option for improving a building thermal comfort. The investigation is here performed within the specific climate context of Reunion Island in south hemisphere. This type of roof system involves choice difficulties for plant species that are more favorable to establish that comfort.
Oil extraction represents an important investment and the control of a rational exploitation of a field means mastering various scientific techniques including the understanding of the dynamics of fluids in place. This paper presents a theoretical investigation of the dynamic behavior of an oil reservoir during its exploitation. More exactly, the m...
In the last two decades, the prospect of a free cooling technologies possibilities led to several experimental and
theoretical investigations by researchers. Nowadays, low temperature solar thermal systems coupled with sorption
machines are the most commercialized solution available to face the cooling demand. Solar heating and cooling
systems are...
This study presents a Global Sensitivity Analysis Tool, named GoSAT, which is a ready to use Matlab automation algorithm of a derived Fourier Amplitude Sensitivity Test (FAST) method that automatically ranks, by decreasing order in a bar diagram, both the first order effects and the order one interaction effects of a model factors. To perform a glo...
This paper deals with new proposals for the design of passive solutions
adapted to the climate of the highlands of Madagascar. While the strongest
population density is located in the central highlands, the problem of thermal
comfort in buildings occurs mainly during winter time. Currently, people use
raw wood to warm the poorly designed houses. Th...
Solar energy technology is an option for energy saving in building air conditioning. A theoretical investigation of an open cycle solar air cooling system using aqueous Lithium Chloride solution as liquid desiccant is presented in this paper. The purpose of this work is to analyze the influences of both internal loads and external forcing, on the s...
A green roof is an option for the improvement of a building thermal comfort. The objective of this work is to
compare respective behaviors of a green roof and a concrete watertight roof vis-à-vis external requests in wet tropical zones. The canopy being considered as uniform, the electric analogy method was used to establish the mathematical models...
L'analyse de sensibilité est une étape importante pour le développement des modèles liés aux phénomènes physiques. Parmi les modèles mathématiques proposés dans la littérature pour l'étude de la digestion anaérobie des substrats liquides, l'auteur a opté pour un modèle dont le développement a visé à simplifier l'abstraction mathématique du procédé...
Tanger, Maroc du 15 au 17 Novembre 2005 203 INTRODUCTION Longtemps considéré comme une opération annexe du traitement des eaux, le traitement des boues ne peut plus être défini à la légère. Les boues constituent des déchets volumineux puisqu'elles contiennent généralement entre 95% et 99% d'eau et sont génératrices de nuisances dans la mesure où el...
Reunion Island is a member of the Indian Ocean Commission. After having evoked the problematic and the socio-economic context related to wastewater treatments and to the elimination of sewage sludge in this island, the author did a theoretical prediction survey of the behaviour of a natural convection functioning greenhouse-dryer towards sewage slu...
Projects
Projects (7)
The aim of SYNBIOZER project is to characterize the biomass from Municipal Solid Waste (MSW) in Reunion island in so as to utilize it in the energy field (Power production from waste). The optimization of this biomass, without sorting, is envisaged. A mini scale experimental device will validate the models and hypotheses of scenarios shall be developed. The project is financed by the European Union through the FEDER (i.e. AMI) funds and will be completed towards the end of 2022. It is led by a research team from the PIMENT laboratory of the University of Reunion. Feel free to contact me for more information and/or research collaboration.
