Incorporation of hybrid phase change materials in plastering mortars for increased energy efficiency in buildings

Tese de Doutoramento em Engenharia Civil.

Characterization of microbial populations in a wastewater treatment plant focusing on Staphylococcus aureus and Pseudomonas aeruginosa

Dissertação de mestrado em Bioengenharia

Aspectos moleculares del desarrollo de biofilms, la colonización de la planta y la emisión de compuestos orgánicos volátiles en bacterias rizosféricas. Molecular aspects of biofilm development, plant colonization and microbial volatile organic emission in rhizospheric bacteria.

Las bacterias que habitan la rizosfera y que poseen la capacidad de provocar un efecto positivo sobre las plantas son denominadas en su conjunto como Rizobacterias Promotoras del Crecimiento Vegetal (PGPR). Estas bacterias han desarrollado diferentes estrategias para adaptarse a diversas condiciones ambientales. La capacidad para responder a variaciones en la disponibilidad nutricional permite la persistencia de la bacteria en el suelo y mejora sus posibilidades para colonizar la planta hospedadora. En la naturaleza, a menudo las bacterias se encuentran en estructuras de comunidades de microorganismos interconectados denominados biofilms, con un estilo de vida diferente al de la vida en forma planctónica. La formación del biofilm podría representar una estrategia de supervivencia de la rizobacteria a condiciones adversas del suelo. Por Microscopía Confocal de Barrido Láser (CLSM), hemos observado que Rhizobium leguminosarum desarrolla un biofilm característico sobre una superficie abiótica. Hemos identificado algunos de los factores genéticos que influyen en su formación. El presente proyecto propone avanzar en el conocimiento de los factores ambientales y genéticos que influyen sobre la capacidad de las rizobacterias para formar biofilms y su impacto en la interacción con las plantas. A través de enfoques genéticos (mutacionales y de expresión génica) y análisis por CLSM nos proponemos acercarnos a un modelo de los factores de superficie, extracelulares y regulatorios propios de la bacteria que influyen en las propiedades de adhesión y la formación de biofilms. Por último, se intentará correlacionar la emisión de compuestos orgánicos volátiles por las bacterias rizosféricas con ciertos aspectos de la promoción del crecimiento de las plantas.

Energía Eólica en Argentina: una cuestión estratégica hacia la Economía del Hidrógeno. Wind Energy in Argentina: a strategic subject towards the Hydrogen Economy.

Identificación/caracterización del problema: El abastecimiento energético en base a fuentes no tradicionales o recursos no renovables es un tema altamente estratégico en las agendas de los Estados. El petróleo se está agotando y las existencias no alcanzarán para abastecer el consumo mundial.Esto ha llevado a Gobiernos a implementar alternativas de producción energética basadas en fuentes no tradicionales, tales como el Hidrógeno (H2), lo cual creará una Economía basada en el Hidrógeno.Argentina cuenta con una matriz energética dependiente en un 90 por ciento del petróleo y con reservas certificadas de petróleo y gas natural para 8,6 y 9,4 años respectivamente. Sin duda, los desafíos próximos serán: a) crear las herramientas necesarias para minimizar una potencial crisis energética en el corto plazo, y b) desarrollar políticas energéticas que articulen su autoabastecimiento e inserción en la Economía del Hidrógeno. Dado que Argentina cuenta con uno de los recursos renovables más importantes del mundo, "el viento", tiene condiciones inmejorables para obtener Hidrógeno (H2) por electrólisis del agua, utilizando energía eléctrica proveniente de fuentes renovables como la eólica (EE). Es por ello que apostar al desarrollo local del H2 basado en la EE nos ofrecerá como país, un rol estratégico en la futura Economía del Hidrógeno.Objetivo General: Identificar la actual Matriz Energética Argentina y reconocer los factores limitantes y oportunidades para la diversificación de la misma, utilizando la Energía Eólica (EE) como pilar hacia la Economía del Hidrógeno (Econo-H2). El fin último será esbozar herramientas de política energética e instrumentos regulatorios pertinentes, que sirvan de base para la formulación de una macro política energética.Metodología de Investigación: Se utilizarán técnicas de análisis de la siguiente información:a) Documental (textos, artículos, información periodística)b) Técnica, Legal y administrativa) Oral (Declaraciones oficiales-privadas y entrevistas)d) Visual (imágenes, gráficos y mapas)e) Datos (cronológicos, estadísticos y geográficos)Resultados esperados: La formulación de herramientas de política energética y de instrumentos regulatorios pertinentes, que sirvan de base para la formulación de una macro política energética que considere la Energía Eólica (EE) como un pilar fundamental para la diversificación de la matriz energética actual. Asimismo se reflexionará sobre la importancia de asociar la EE a la producción masiva del hidrógeno (H2) para la inserción y proyección futura de la Argentina hacia la Economía del Hidrógeno.Importancia del Proyecto: Argentina ha ratificado el protocolo de Kioto y forma parte de la Johannesburg Renewable Energy Coalition (JREC), por la cual ha asumido compromisos para fijar políticas nacionales de incentivo para el desarrollo de uso de energías renovables.Sin embargo, y a pesar de una serie de iniciativas y leyes promulgadas relacionadas a uso de energías renovables, hasta la fecha, no se ha logrado cumplir con metas concretas.Consideramos que uno de los factores fundamentales que ha dificultado esto, se basa en la ausencia de una política de Estado de mediano y largo plazo que incluya a las energías renovables como un objetivo concreto y un sistema de instrumentos y planes complementarios que acompañen dicha política.

Overcoming the supply inconsistencies of tidal current energy conversion devices

The adoption of a sustainable approach to meeting the energy needs of society has recently taken on a more central and urgent place in the minds of many people. There are many reasons for this including ecological, environmental and economic concerns. One particular area where a sustainable approach has become very relevant is in the production of electricity. The contribution of renewable sources to the energy mix supplying the electricity grid is nothing new, but the focus has begun to move away from the more conventional renewable sources such as wind and hydro. The necessity of exploring new and innovative sources of renewable energy is now seen as imperative as the older forms (i.e. hydro) reach the saturation point of their possible exploitation. One such innovative source of energy currently beginning to be utilised in this regard is tidal energy. The purpose of this thesis is to isolate one specific drawback to tidal energy, which could be considered a roadblock to this energy source being a major contributor to the Irish national grid. This drawback presents itself in the inconsistent nature in which a tidal device generates energy over the course of a 24 hour period. This inconsistency of supply can result in the cycling of conventional power plants in order to even out the supply, subsequently leading to additional costs. The thesis includes a review of literature relevant to the area of tidal and other marine energy sources with an emphasis on the state of the art devices currently in development or production. The research carried out included tidal data analysis and manipulation into a model of the power generating potential at specific sites. A solution is then proposed to the drawback of inconsistency of supply, which involves the positioning of various tidal generation installations at specifically selected locations around the Irish coast. The temporal shift achieved in the power supply profiles of the individual sites by locating the installations in the correct locations, successfully produced an overall power supply profile with the smoother curve and a consistent base load energy supply. Some limitations to the method employed were also outlined, and suggestions for further improvements to the method were made.

A comparative study in two secondary schools aimed at improving their energy management: Archbishop McHale College Tuam, Coláiste Cholmcille Indreabhánn

Climate change is a crisis that is going to affect all of our lives in the future. Ireland is expected to have increased storms and rain throughout the country. This will affect our lives greatly unless we do something to change it. In an attempt to try and reduce the impacts of climate change, countries across the world met to address the problem. The meeting became known as the Kyoto Protocol. The Kyoto protocol set out objectives for each developed country to achieve with regards to carbon emissions to the same levels as 1990 levels. Due to the economy in Ireland being at a low point in 1990, Ireland was given a target of 13% carbon emissions above 1990 levels. In order to meet targets Ireland produced two energy papers, the green paper and the white paper. The green paper identified drivers for energy management and control; they were security of energy supply, economic competitiveness and environmental protection. The white paper produced targets in which we should aim to achieve to try and address the green papers drivers. Within the targets was the plan to reduce energy consumption in the public sector by 33% by 2020 through energy conservation measures. Schools are part of the public sector that has targets to reduce its energy consumption. To help to achieve targets in schools initiatives have been developed by the government for schools. Energy audits should be performed in order to identify areas where the schools can improve their current trends and show where they can invest in the future to save money and reduce the schools overall environmental footprint. Grants are available for the schools for insulation through the energy efficiency scheme and for renewable energy technologies through the ReHeat scheme. The promotion of energy efficient programs in schools can have a positive effect for students to have an understanding. The Display Energy Certificate is a legal document that can be used to understand how each school is performing from an energy perspective. It can help schools to understand why they need to change their current energy management structure. By improving the energy management of the schools they then improve the performance on the Display Energy Certificate. Schools should use these tools wisely and take advantage of the grants available which can in the short to long term help them to save money and reduce their carbon footprint.

Implementation of the I.S. EN 16001:2009 energy management standard into GlaxoSmithKline (GSK) Ltd, Cork

As manufacturers face an increasingly competitive environment, they seek out opportunities to reduce production costs without negatively affecting the yield or the quality of their finished products. The challenge of maintaining high product quality while simultaneously reducing production costs can often be met through investments in energy efficient technologies and energy efficiency practices. Energy management systems can offer both technological and best practice efficiencies in order to achieve substantial savings. A strong energy management system provides a solid foundation for an organisation to reduce production costs and improve site efficiency. The I.S EN16001 energy management standard specifies the requirements for establishing, implementing, maintaining and improving an energy management system and represents the latest best practice for energy management in Ireland. The objective of the energy management system is to establish a systematic approach for improving energy performance continuously. The I.S EN16001 standard specifies the requirements for continuous improvement through using energy more efficiently. The author analysed how GlaxoSmithKline’s (GSK) pharmaceutical manufacturing facility in Cork implemented the I.S. EN16001 energy management system model, and defined how energy saving opportunities where identified and introduced to improve efficiency performance. The author performed an extensive literature research in order to determine the current status of the pharmaceutical industry in Ireland, the processes involved in pharmaceutical manufacturing, the energy users required for pharmaceutical manufacturing and the efficiency measures that can be applied to these energy users in order to reduce energy consumption. The author then analysed how energy management standards are introduced to industry and critically analysed the driving factors for energy management performance in Ireland through case studies. Following an investigation as to how the I.S. EN16001 energy management standard is operated in GSK, a critical analysis of the performance achieved by the GSK energy management system is undertaken in order to determine if implementing the I.S EN16001 standard accelerates achieving energy savings. Since its introduction, the I.S. EN16001 model for energy management has enabled GSK to monitor, target and identify energy efficiency opportunities throughout the site. The model has put in place an energy management system that is continuously reviewed for improvement and to date has reduced GSK’s site operations cost by over 30% through technical improvements and generating energy awareness for smarter energy consumption within the GSK Cork site. Investment in I.S. EN16001 has proved to be a sound business strategy for GSK especially in today's manufacturing environment.

The design and development of heat extraction technologies for the utilisation of compost thermal energy

A composting Heat Extraction Unit (HEU) was designed to utilise waste heat from decaying organic matter for a variety of heating application The aim was to construct an insulated small scale, sealed, organic matter filled container. In this vessel a process fluid within embedded pipes would absorb thermal energy from the hot compost and transport it to an external heat exchanger. Experiments were conducted on the constituent parts and the final design comprised of a 2046 litre container insulated with polyurethane foam and kingspan with two arrays of qualpex piping embedded in the compost to extract heat. The thermal energy was used in horticultural trials by heating polytunnels using a radiator system during a winter/spring period. The compost derived energy was compared with conventional and renewable energy in the form of an electric fan heater and solar panel. The compost derived energy was able to raise polytunnel temperatures to 2-3°C above the control, with the solar panel contributing no thermal energy during the winter trial and the electric heater the most efficient maintaining temperature at its preset temperature of 10°C. Plants that were cultivated as performance indicators showed no significant difference in growth rates between the heat sources. A follow on experiment conducted using special growing mats for distributing compost thermal energy directly under the plants (Radish, Cabbage, Spinach and Lettuce) displayed more successful growth patterns than those in the control. The compost HEU was also used for more traditional space heating and hot water heating applications. A test space was successfully heated over two trials with varying insulation levels. Maximum internal temperature increases of 7°C and 13°C were recorded for building U-values of 1.6 and 0.53 W/m2K respectively using the HEU. The HEU successfully heated a 60 litre hot water cylinder for 32 days with maximum water temperature increases of 36.5°C recorded. Total energy recovered from the 435 Kg of compost within the HEU during the polytunnel growth trial was 76 kWh which is 3 kWh/day for the 25 days when the HEU was activated. With a mean coefficient of performance level of 6.8 calculated for the HEU the technology is energy efficient. Therefore the compost HEU developed here could be a useful renewable energy technology particularly for small scale rural dwellers and growers with access to significant quantities of organic matter

Development of a data acquisition system to characterise sustainable energy technologies and to support Web-Based learning (DAQ-WBL)

Driven by concerns about rising energy costs, security of supply and climate change a new wave of Sustainable Energy Technologies (SET’s) have been embraced by the Irish consumer. Such systems as solar collectors, heat pumps and biomass boilers have become common due to government backed financial incentives and revisions of the building regulations. However, there is a deficit of knowledge and understanding of how these technologies operate and perform under Ireland’s maritime climate. This AQ-WBL project was designed to address both these needs by developing a Data Acquisition (DAQ) system to monitor the performance of such technologies and a web-based learning environment to disseminate performance characteristics and supplementary information about these systems. A DAQ system consisting of 108 sensors was developed as part of Galway-Mayo Institute of Technology’s (GMIT’s) Centre for the Integration of Sustainable EnergyTechnologies (CiSET) in an effort to benchmark the performance of solar thermal collectors and Ground Source Heat Pumps (GSHP’s) under Irish maritime climate, research new methods of integrating these systems within the built environment and raise awareness of SET’s. It has operated reliably for over 2 years and has acquired over 25 million data points. Raising awareness of these SET’s is carried out through the dissemination of the performance data through an online learning environment. A learning environment was created to provide different user groups with a basic understanding of a SET’s with the support of performance data, through a novel 5 step learning process and two examples were developed for the solar thermal collectors and the weather station which can be viewed at http://www.kdp 1 .aquaculture.ie/index.aspx. This online learning environment has been demonstrated to and well received by different groups of GMIT’s undergraduate students and plans have been made to develop it further to support education, awareness, research and regional development.

Lectures on plant physiology. Authorized English translation by R.J. Harvey Gibson.

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