Submitted by Regina Francielle Silva Paulino null (repaulino28@yahoo.com.br) on 2017-05-15T16:55:58Z No. of bitstreams: 1 Disssertação para repositório.pdf: 2094038 bytes, checksum: 627da6791c7083908510f6129d80d56f (MD5) / Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-05-16T14:35:09Z (GMT) No. of bitstreams: 1 paulino_rfs_me_guara.pdf: 2094038 bytes, checksum: 627da6791c7083908510f6129d80d56f (MD5) / Made available in DSpace on 2017-05-16T14:35:09Z (GMT). No. of bitstreams: 1 paulino_rfs_me_guara.pdf: 2094038 bytes, checksum: 627da6791c7083908510f6129d80d56f (MD5) Previous issue date: 2017-03-08 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Neste trabalho são estudados dois processos que utilizam biogás para obtenção do biohidrogênio. Inicialmente é analisado o processo de eletrólise da água, com o uso de energia elétrica gerada em conjunto motor de combustão interna/gerador (MCI) operando com biogás de aterro sanitário. Visando aproveitamento de calor dos gases de escape do MCI estuda-se o potencial de geração de energia térmica útil pela aplicação da técnica de cogeração. Considera-se dois casos: o primeiro para a produção de água quente em um trocador de calor, e o segundo, para a produção de água gelada em um sistema de refrigeração por absorção. Posteriormente é estudada a reforma a vapor de biogás para a produção de biohidrogênio, que utiliza também esse biocombustível para a geração de vapor superaquecido necessário ao processo de reforma. O objetivo é efetuar a análise energética de modo a determinar as eficiências dos processos, o potencial de produção de biohidrogênio, água quente ou água gelada, nos aterros sanitários da cidade de São Paulo. Também é efetuada análise de engenharia econômica para a determinação do custos da produção de biohidrogênio, água quente e água gelada, em US$/kWh. Esse estudo baseia-se em parâmetros tais como, investimento capital, custos de manutenção e operação dos equipamentos, período equivalente de utilização e período de amortização de capital. Em fase final, foram realizados estudos de impactos ambientais para a determinação das eficiências ecológicas dos processos de produção de biohidrogênio (reforma a vapor e eletrólise), considerando as emissões de poluentes, o dióxido de carbono equivalente e os indicadores de poluição. Como conclusões, tem-se que considerando a disponibilidade de biogás da cidade de São Paulo, existe potencial para a produção de biohidrogênio, e que o processo de reforma a vapor do biogás apresenta maior nível de eficiência sob o ponto de vista termodinâmico. Quando se considera a eletrólise incorporando a técnica da cogeração com a produção simultânea de eletricidade e água quente ou água gelada, observa-se aumento da eficiência energética do processo. A reforma a vapor do biogás, também se mostra mais atrativa economicamente de acordo com os parâmetros considerados. Sobre o ponto de vista ambiental, o processo de eletrólise com produção de água gelada apresenta maior eficiência ecológica, seguidos do processo de produção de água quente, reforma a vapor e somente eletrólise. / In this work is studied two processes to obtain hydrogen using biogas. Initially is analyzed the process of electrolysis of water, with the use of electricity generated in conjunction with an internal combustion engine / generator (ICE) operating with landfill biogas. generated by an internal combustion engine/generator operating with landfill biogas, is analyzed. In order to take advantage of the exhaust gases from the combustion of biogas, the potential of cogeneration is studied, another two cases are considered. The first one studies the production of hot water in the heat exchanger and the second analyzes the use of absorption refrigeration system to produce cold water. Subsequently it is studied the steam reform of biogas for the production of hydrogen, which is constituted of biogas burning for the generation of superheated steam used in the conversion of the fuel input. The objective is to make the energy analysis in order to determine the efficiency of the processes and the potential of producing hydrogen, hot water or ice water in the landfills of the city of São Paulo using the biogas generated. An economic engineering analysis to determine the production hydrogen cost, hot water and ice water, in US$/kWh, based on capital investment, maintenance and operation costs, equivalent period of use and payback. In the final phase, environmental study method is applied to determine the ecological efficiencies of the hydrogen production processes using biogas, considering the emissions of pollutants, carbon dioxide equivalent and pollution indicator. As a conclusion, considering the hydrogen production capacity and the biogas availability of the city of São Paulo, the process of steam reforming of the biogas is more thermodynamically efficient. When considering the electrolysis incorporating the cogeneration technique with the simultaneous production of electricity and hot water or cold water, it is observed an increase in the energy efficiency of the process. The steam reform of the biogas is more attractive economically according to the considered parameters. From the environmental point of view, the process of electrolysis with the production of cold water presents greater ecological efficiency, followed by the process of hot water production, steam reforming and only electrolysis.

Electricity grids require the ancillary services frequency control, grid operation, re-establishment of supply and voltage stability for a proper operation. Historically, conventional power plants in the transmission grid were the main source providing these services. An increasing share of decentralized renewable energy in the electricity mix causes decreasing dispatch times for conventional power plants and may consequently lead to a partial replacement of these technologies. Decentralized energy sources are technically capable of providing ancillary services. This work focuses on the provision of reactive power for voltage stability from decentralized sources. The aim is to answer the question of how voltage stability and reactive power management can be achieved in a future electricity system with increasing shares of decentralized renewable energy sources in an economical and efficient way. A methodology that takes reactive power and voltage stability in an electricity system into account is developed. It allows for the evaluation of the economic benefits of different reactive power supply options. A non-linear and a linearized techno-economic grid model are formulated for this purpose. The analysis reveals an increasing importance of reactive power from the distribution grid in future development scenarios, in particular if delays in grid extension are taken into account. The bottom-up assessment indicates a savings potential of up to 40 mio. EUR per year if reactive power sources in the distribution grid provide reactive power in a controlled manner. Although these savings constitute only a small portion of the total cost of the electricity system, reactive power from decentralized energy sources contributes to the change towards a system based on renewable energy sources. A comparison of different reactive power remuneration mechanisms shows that a variety of approaches exist that could replace the inflexible mechanisms of obligatory provision and penalized consumption of reactive power that are mostly in place nowadays.

Made available in DSpace on 2014-07-29T15:08:20Z (GMT). No. of bitstreams: 1 dissertacao joao carlos pre textuais.pdf: 617522 bytes, checksum: bb07bb21bb4875ee05bd7e833ba62c51 (MD5) Previous issue date: 2009-02-10 / This work presents a case analysis of energetic harnessing in a piggery, based on the use of biogas generated from pig sewage. The analysis shows that the energy from the biogas produced in the farm processes can be partially used through Clean Development Mechanisms (CDM) in order to improve the system efficiency. The utilized process presents environmental and economical benefits as carbon emissions are reduced and their credits can be traded. Moreover, an economic analysis of alternatives for biogas use was carried out taking into account technical, environmental and financial aspects. The case study was realized on a piggery farm in the south-west of the Goiás State where the economical viability of each of the presented alternatives was analyzed considering the following: total burning of biogas; generation of electrical energy; heating; or the combined heat and power generation (CHP). / Este trabalho apresenta a análise de um caso baseado no aproveitamento do biogás gerado a partir de rejeitos de suínos. A análise mostra que a energia do biogás produzido nos processos da granja pode ser parcialmente aproveitada através de mecanismos de desenvolvimento limpos (MDL) com a finalidade de aumentar a eficiência energética do sistema. O processo utilizado apresenta benefícios ambientais e econômicos, já que as emissões de carbono são reduzidas e seus créditos podem ser negociados. Uma análise econômica de alternativas de geração energética do biogás é também apresentada, considerando-se aspectos técnicos, ambientais e financeiros. O estudo foi realizado em uma granja no sudoeste do estado de Goiás, e analisa a viabilidade de cada uma das alternativas apresentadas para o aproveitamento energético do gás, que são: queima total do biogás; geração de energia elétrica; aquecimento; ou a combinação de aquecimento e geração de energia elétrica.

O Laboratório de Análises Clínicas (LAC) vem buscando, no decorrer dos anos, alternativas quanto à sua capacidade em gerar receita. A busca por melhores resultados incrementou a parceria com as organizações chamadas de \"convênios médicos\" ou \"medicina de grupo\" que, em geral, remuneram as análises laboratoriais com base em tabelas de procedimentos criadas pela Associação Médica Brasileira AMB. Destas, a mais utilizada é a Tabela AMB 92, devido a utilizar valores de Coeficiente de Honorários (CH), que convertidos em reais, são mais interessantes para os LAC. Este estudo teve como base o método recomendado pelo \"National Committee for Clinical Laboratory Standards\" - NCCLS, que normatiza a apuração do custo baseado na atividade desempenhada durante a sua realização. O objetivo deste trabalho foi estabelecer o custo das análises laboratoriais e verificar se, em comparação à tabela AMB 92, a opção pelos contratos com os \"convênios médicos\" realmente gera lucro a um laboratório de pequeno porte. Para tanto foram selecionadas as análises mais solicitadas no mês de agosto de 2004 em um laboratório de pequeno porte, que presta atendimento a pacientes conveniados a planos de saúde e particulares. O ressarcimento aos laboratórios prestadores de serviço é efetuado com base no valor do CH, que pode variar de acordo com o contrato firmado com os convênios médicos. Os resultados mostraram que na comparação dos custos unitários das 69 análises apuradas com a Tabela AMB-92 houve lucro em 52% das análises quando o valor de CH foi de R$ 0,2610 e quando atribuído um valor de CH de R$ 0,1800, houve lucro em apenas 28% das análises. / The Clinical Laboratory (CL) has been seeking, throughout these years, alternative forms of increasing budget. The search for better results has flourished partnerships with organizations named \"prepaid group practice\" or \"group medicine\" which usually reward the clinical analysis based on tables of procedures established by the Brazilian Medicai Association - BMA. Among them, the most employed is the BMA 92 Table, due to the use of payment coefficient values (PC) which, expressed in Brazilian currency (reais), are in CLs interests. This study was carried out based on the method recommended by the National Committee for Clinical Laboratory Standards - NCCLS, who draws up the regulation of the cost estimate of a procedure while it is carried out. The objective of this study was to establish the cost of clinical analysis and to verify if, comparing to the BMA 92 Table, the contracts with prepaid group practices are actually profitable for a small size laboratory. In order to achieve it, most requested analysis during August 2004 in a small size laboratory which offers services to patients affiliated with prepaid health plans and private health plans. The payment to the laboratories which offer services is made regarding the PC values, which may change according to the contract with the health plans. The results demonstrated that in comparison to the cost of each one of 69 analysis verified according to the BMA 92 Table, 52% of the analysis were profitable when the PC value was R$ 0.2610 and for the PC value of R$ 0.1800 only 28% of the analysis were profitable.

Abstract Electrocoagulation (EC) is an emerging technology that combines the functions and advantages of conventional coagulation, flotation, and electrochemistry in water and wastewater treatment. The aims of this work included doing an updated literary review of recent feasible applications of EC, which were found to be plentiful. Since the economic and practical operational key figures related to EC haven’t been extensively mapped out before, this was a prime objective of this part of the work. The aim of the next part of this work was to find new feasible applications for EC in the treatment of water and wastewater. The studied wastewaters included bio- and synthetic oil-in-water emulsions, various industrial nutrient-containing wastewaters, and peat bog drainage water containing humic substances (an interesting and topical problem, especially in Finland). These studies proved the feasibility of EC. In addition, larger-scale experiments were also conducted successfully, thus proving the scalability of the EC process. Extensive economic analyses of the studied EC applications were also done. The operational costs and energy consumption of EC were found to be very low—typically about 0.1–1.0 €/m3 and 0.4–4.0 kWh/m3. It has been forecasted that in the future there will be a shortage of virgin phosphorus. Therefore, another essential purpose of this work was to conduct a preliminary study on the feasibility of using EC for nutrient (especially phosphorus, but also nitrogen) removal and recovery from different types of real wastewater. Specifically, it may be possible to use EC sludges containing notable amounts of phosphorus and nitrogen as additives in granulated bio ash-based fertilizer products for various applications. This is a novel idea and a “hot topic” in the waste utilization sector and in circular and bioeconomy. / Tiivistelmä Elektrokoagulaatio (electrocoagulation, EC) on nosteessa oleva teknologia, joka yhdistää perinteisen koagulaation, flotaation ja sähkökemian hyödyt ja mahdollisuudet vesien ja jätevesien käsittelyssä. Tämän työn ensimmäisenä tavoitteena oli laatia kirjallisuuskatsaus EC:n viimeaikaisista käyttökelpoisista sovelluksista, joita löytyi runsaasti. Koska EC:n toiminnallisia ja taloudellisia avainlukuja ei ole kartoitettu kattavasti aiemmin, tämän tekeminen oli tämän osion tärkein tavoite. Väitöstyön seuraavana tavoitteena oli löytää uusia sovellutuksia EC:lle vesien ja jätevesien käsittelyssä. Tutkittuja vesiä olivat bio- ja synteettisistä öljyistä valmistetut öljy-vesiemulsiot, erilaiset teolliset ravinnepitoiset jätevedet ja humusainepitoiset turvesoiden valumavedet (kiinnostava ja ajankohtainen ongelma, erityisesti Suomessa). EC todettiin käyttökelpoiseksi teknologiaksi näissä kokeissa. Suuremman skaalan kokeilla todistettiin lisäksi EC-prosessin skaalautuvuus. Lisäksi, em. EC-sovellutuksista suoritettiin kattavat taloudelliset analyysit. EC:n käyttökustannukset ja energiankulutus todettiin erittäin pieniksi, tyypillisesti ne olivat välillä 0.1–1.0 €/m3 ja 0.4–4.0 kWh/m3. On ennustettu, että tulevaisuudessa on pulaa neitseellisestä fosforista. Tästä johtuen eräs tämän työn keskeisistä tarkoituksista oli suorittaa alustavia kokeita liittyen EC:n käyttökelpoisuuteen ravinteiden (erityisesti fosfori, mutta myös typpi) poistossa ja talteenotossa aidoista jätevesistä. Erityisesti jatkossa voisi olla järkevää hyödyntää runsaasti fosforia ja typpeä sisältäviä EC-sakkoja lisäaineina rakeistetuissa biotuhkapohjaisissa lannoitteissa eri sovellutuksissa. Tämä idea on uusi ja on jo herättänyt suurta kiinnostusta mm. kierto- ja biotaloussektoreilla.

The production potential of the sugar-alcohol market and increased demand for ethanol makes the sugarcane the most important source of energy biomass for Brazilian agribusiness. This study aimed to evaluate the technical and economic performance of the culture of sugarcane under different levels of supplemental irrigation management for the production of ethanol in the Central Region of RS. The test was developed in the experimental area at the Polytechnic School of the Federal University of Santa Maria-RS in agricultural crops in the years 2013-2014 and 2014-2015. The treatments consisted of four blades of supplemental irrigation: 30, 60, 90 and 120% with control without irrigation. The variety used was RB93-5581 early cycle, planted on November 14, 2013. The experimental design was a randomized block design with six replications. Each experimental unit consisted of 4 rows with a spacing of 1 m and 5 m in length, each block of 20 m2 and a total area of 600 m2. Irrigation management was based on crop evapotranspiration, according to the methodology proposed by FAO. The irrigation system used was located drip between spacing each emitter and 0.2 m flow of 0.8 L h-1, and the frequency of irrigation was every seven days. It was carried out chemical analysis and physical soil. The monitoring of soil moisture was the time domain reflectometry (TDR). The following parameters were evaluated: tillering, plant height, diameter, leaf area, total weight, dry weight, yield, technological parameters, was also carried out the economic viability. The highest yield was in ratoon cane, with 190 t ha-1 in treatment 60% of ETc and the lowest yield was in the plant cane in the treatment of to rainfed 158.80 t ha-1. The difference between the highest and the lowest yield was approximately 11% and 7% in plant cane and tamp respectively. The rate of technical efficiency was maximum yield in 78% of ETc. The total mass and obtain dry mass increment of 20% to 25% by ratoon cane, respectively. The largest number of tillers, leaf area and the number of green leaves was in the treatment 120% of ETc. The deficit and excess moisture affected the number of tillers, plant height, the stalk diameter, leaf area, total mass, dry matter, yield and technological parameters for the production of ethanol. In sugarcane plant in rainfed and irrigated, the variable cost represented 54.40% and 66.81% and the fixed cost of 45.60% and 33.19%, respectively. The difference in the cost of production in rainfed and irrigated was 27.23% and 57.20% for the plant cane and tamp respectively. Presented economic viability, sugarcane grown in rainfed and 60% of ETc, with differences in the cost of production and net profit of 53.94% and 52.20%, with financial return in the year of implementation and 4 years and 4 months, respectively. / O potencial de produção do mercado sucroalcooleiro e o aumento na demanda por etanol fazem da cana-de-açúcar a mais importante fonte de biomassa energética para a agroindústria brasileira. Esse estudo teve como objetivo avaliar o desempenho técnico e econômico da cultura da cana-de-açúcar submetida a diferentes níveis de manejo de irrigação suplementar para a produção de etanol na Região Central do RS. Desenvolvido na área experimental do Colégio Politécnico da Universidade Federal de Santa Maria-RS nas safras agrícolas nos anos 2013-2014 e 2014-2015. Os tratamentos foram compostos por quatro lâminas de irrigação suplementar: 30, 60, 90 e 120% da ETc e com testemunha sem irrigação. A variedade utilizada foi de ciclo precoce RB93-5581, plantada em 14 de novembro de 2013. O desenho experimental foi blocos ao acaso, com seis repetições. Cada unidade experimental foi constituída por 4 linhas com espaçamento de 1 m e 5 m de comprimento, cada bloco com 20 m2 e a área total de 600 m2. O manejo da irrigação foi realizado com base na evapotranspiração da cultura, conforme a metodologia proposta pela FAO. O sistema de irrigação utilizado foi localizado por gotejamento, com espaçamento entre cada emissor de 0,2 m e vazão de 0,8 L h-1 e a frequência de irrigação foi a cada sete dias. Foi realizada a análise química e física do solo. O monitoramento da umidade do solo foi pela reflectômetria no domínio do tempo (TDR). Avaliaram-se os seguintes parâmetros: perfilhamento, altura das plantas, diâmetros, área foliar, massa total, massa seca, rendimento, os parâmetros tecnológicos e, também foi realizado a viabilidade econômica. O maior rendimento foi na cana soca, com 190 t ha-1, no tratamento 60% da ETc e, o menor rendimento foi na cana planta, no tratamento de sequeiro, de 158,80 t ha-1. A diferença entre o maior e o menor rendimento foi de aproximadamente 11% e 7%, na cana planta e soca, respectivamente. A taxa da máxima eficiência técnica foi no rendimento de 78% da ETc. A massa total e a massa seca obtiverem incremento de 20% e 25% em cana soca, respectivamente. Os maiores número de perfilhos, de área foliar e de número de folhas verdes foi no tratamento 120% da ETc. O deficit e o excesso de umidade afetaram o número de perfilhos, a altura da planta, os diâmetros do colmo, a área foliar, a massa total, a massa seca, o rendimento e os parâmetros tecnológicos para a produção de etanol. Na cana planta em sequeiro e sob irrigação, o custo variável representou 54,40% e 66,81% e o custo fixo de 45,60% e 33,19%, respectivamente. A diferença do custo de produção em sequeiro e sob irrigação foi de 27,23% e 57,20%, para a cana planta e soca, respectivamente. Apresentaram viabilidade econômica, a cana-de-açúcar cultivada em sequeiro e com 60% da ETc, apresentando diferença no custo de produção de 53,94% e do lucro líquido de 52,20%, com retorno financeiro no ano de implantação e com 4 anos e 4 meses, respectivamente.

This thesis is focused on the analysis by means of appropriate analytical methods. The theoretical part defines the content of the concepts and describes selected methods for its measurement and evaluation of factors placed upon it. The practical part applies the selected method for enterprise DSB EURO ltd. In conclusion summarizes the lessons learned and proposed measures for the future development of the company.

Předmětem diplomové práce je zpracování ekonomické analýzy vybraného průmyslové podniku s využitím nástrojů a metod finanční a ekonomické analýzy. Cílem práce je na základě detailní analýzy účetních a interních dat z let 2003 až 2008 prozkoumat vnitřní ekonomické závislosti, specifické pro daný podnik, a na základě toho co nejpřesněji predikovat stav na konci roku 2009. Součástí analýzy je také podrobné odvětvové srovnání podniku s využitím výpočtu hodnoty EVA pomocí metodiky pyramidového rozkladu ročního ukazatele EVA-INFA, jak ji používá Ministerstvo průmyslu a obchodu ČR. Kromě jiného je cílem práce doporučit vedení analyzovaného podniku opatření, která by vedla v roce 2009 a dalších letech ke zlepšení ukazatele EVA.

The diploma thesis gives a detailed analysis of the Slovak labour market. The beginning of the thesis includes political and economic development of an independent Slovak state since the Czechoslovak separation until a current situation. The rest of the thesis is devoted to the analysis of the labour market situation. Since its major problem is a high unemployment rate, the thesis gives an overview and deeper analysis of its various aspects. Furthermore, the indicators which influence the existence of the unemployment rate are to be found. The end of the thesis sums up the most problematic areas of Slovak labour market. In addition, the necessary steps which need to be done in order to reach an improvement are mentioned.

Les travaux présentés dans ce manuscrit portent sur l’optimisation d’une chaufferie collective multi-énergie en l’équipant d’un système de stockage thermique de type hydro-accumulation. L’efficacité de ce dernier dépend de sa capacité à conserver son énergie initiale. Ainsi, pour minimiser les pertes thermiques, le système de stockage doit être correctement isolé. Un modèle de ballon d’hydro-accumulation stratifié est développé et validé expérimentalement. Une étude paramétrique est menée afin d’étudier l’impact, sur les pertes thermiques, de paramètres géométriques et météorologiques. Ensuite, une approche de dimensionnement, fondée sur une stratégie de gestion séquentielle et une étude paramétrique est proposée. Plusieurs critères énergétiques et économiques peuvent ainsi être évalués pour différents volumes de stockage thermique. L’approche de dimensionnement proposée a été appliquée à plusieurs sites exploités par Cofely GDF-Suez, notre partenaire industriel. Les résultats obtenus montrent que le dimensionnement optimal du système de stockage et la gestion intelligente du procédé permettent d'optimiser le fonctionnement d’un site. Des économies énergétiques et financières importantes peuvent ainsi être réalisées. La stratégie de gestion séquentielle proposée n’anticipe pas les besoins du réseau de chaleur. C’est pourquoi une stratégie fondée sur la commande prédictive (MPC pour Model Predictive Control) est susceptible d’améliorer le fonctionnement et les performances d’une chaufferie collective équipée d’un système d’hydro-accumulation. Afin de mettre en œuvre un tel contrôleur, la puissance thermique demandée par le réseau de chaleur doit être correctement prédite. Par conséquent, une méthode de prédiction a été développée. Elle s’appuie sur une analyse multi-résolution par transformée en ondelettes discrète et sur l’utilisation de réseaux de neurones artificiels de type perceptron multicouche. La stratégie séquentielle (non prédictive) et la stratégie prédictive ont été appliquées à une chaufferie collective mixte située dans une commune du nord de la France. Pour ce cas d’étude, la stratégie prédictive est plus efficace. De plus, les résultats montrent que, quelle que soit la stratégie utilisée, équiper la chaufferie d’un système d’hydro-accumulation correctement dimensionné est un investissement rentable. Il permet de minimiser la consommation d’énergie fossile et, par conséquent, le coût économique et les émissions de CO2. / The present work deals with optimizing a multi-energy district boiler by adding to the plant a thermal water storage tank. The effectiveness of such a system depends on how long the stored energy can be kept without considerable degradation. The storage tank should be properly insulated to reduce the rate of heat loss. Thus, firstly, a stratified water thermal storage model is developed and experimentally validated. A parametric study is carried out to determine the influence of geometric and meteorological parameters on heat loss. Next, a reliable sizing method based on a sequential management strategy and a parametric study is proposed. Various energy and economic criteria have been evaluated for a range of thermal storage sizes. The proposed methodology has been applied to many plants managed by Cofely GDF-Suez, our industrial partner. Results highlight the ability of a thermal storage tank (optimally sized and managed) to improve the operation of a multi-energy district boiler and realize significant energy and economic savings. The main drawback of the proposed sequential management strategy lies in not taking into account the future power demand. That is why a strategy based on a Model Predictive Controller (MPC) is likely to improve operation and performance. In order to implement such a controller, the power demand has to be accurately forecasted. As a consequence, a short-term forecast method, based on wavelet-based Multi-Resolution Analysis (MRA) and multilayer Artificial Neural Networks (ANN) is proposed. Both the sequential and the predictive strategies are applied to a northeast France multi-energy district boiler selected as a case study. The main result to retain is that the efficiency of water thermal storage tank is mainly related to its design and the way it is managed. For this case study, the predictive strategy regardless the size of the storage tank, the predictive strategy is more reliable. Furthermore, in all cases an adequately sized and managed thermal storage tank is a profitable investment. It allows the fossil energy consumption to be significantly reduced. The same remark applies to the functioning costs and CO2 emissions.