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Rodrigues A.M.,University of Lisbon | Aelenei L.,Instituto Nacional Of Engineering
International Journal of Energy Research | Year: 2010

Cavity walls are often proposed in the building envelope design as a solution for improving the thermal comfort of the occupants and reducing the adverse condensation effects on the building fabric. Although the behaviour of a nonventilatedcavity wall is well-known, more studies are required when cavity ventilation is allowed. In order to consistently predict the thermal behaviour of a naturally ventilated cavity wall, a convective model based on the integral equations of motion and enthalpy was developed and applied in the present study. The model is presented as a combination of two limiting cases of a steady laminar flow into the channel gap: fully developed flow and boundary layer flow. Conduction effects across the system are also included through a proper limiting case and then combined with the convective model. In addition a numerical CFD model was developed that provides solution for free convective flow configurations between two parallel conducting vertical walls. For comparison purposes, some test cases were simulated with the two models and a general good agreement was found between results. Finally, the integral model was applied to assess the thermal performance of a ventilated cavity wall for winter and summer conditions. Copyright © 2009 John Wiley & Sons, Ltd. Source

Gomes M.C.,University of Lisbon | Barbosa-Povoa A.P.,Campus Management | Novais A.Q.,Instituto Nacional Of Engineering
International Journal of Production Research | Year: 2010

This research presents a new reactive scheduling methodology for job shop, make-to-order industries. An integer linear programming formulation previously developed by the authors to schedule these types of industries is extended to address the problem of inserting new orders in a predetermined schedule, which is important in order-driven industries. A reactive scheduling algorithm is introduced to iteratively update the schedules. Numerical results on realistic examples of job shops of different sizes illustrate the effectiveness of the approach. In each case, different alternatives for inserting a set of new orders in an initial schedule are optimally generated, enabling the user to choose the most convenient one. Solutions are characterised by measures of scheduling efficiency as well as stability measures that assess the impact of rescheduling operations in a previously defined scheduling solution. © 2010 Taylor & Francis. Source

Burke A.J.,University of Evora | Marinho V.R.,University of Evora | Furtado O.M.R.,Instituto Nacional Of Engineering
Current Organic Synthesis | Year: 2010

Over the last several years the need to improve efficiency and minimize waste has spurred chemists to develop new catalysts for a wider range of reactions that was previously only achievable using stoichiometric reagents. A very powerful approach at achieving this goal is through the use of multiple transition metal catalysed one-pot processes, whereby the desired target compound is synthesised in a single work-up step. In this review we highlight some of the most significant developments in this field that have occurred over the last 10 years. © 2010 Bentham Science Publishers Ltd. Source

Agency: Cordis | Branch: FP7 | Program: CSA-SA | Phase: ENV.2007. | Award Amount: 2.42M | Year: 2008

Africa, the largest single component of the African Caribbean Pacific (ACP) Group of States, despite its huge potential for development through both human and georesources, suffers in many places from poverty and underdevelopment. The sustainable use of its resources is a key issue, not only for development of the African countries, but also for the worlds future. Over the coming decades, these issues are likely to play an ever-increasing role due to the worlds growing population, rapid urban development and the rising demand for better infrastructure and services. The sustainable use of georesources requires a knowledge based on data, information and expertise. Thus, the availability, traceability, accessibility and processing using GIS technologies of heterogeneous data from multiple sources is essential. Such processing requires a qualified and experienced personnel and the definition of strategies for capacity building and training. In view of this situation, a recognised need has emerged for a shared, distributed, Internet-linked georesources observation system, based on open standards and interoperability developments, as a contribution to the sustainable development of African countries. The Support Action is the preparatory phase needed to design the African-European Georesource Observation System (AEGOS) capable of hosting and providing access to Africas geological resources, including groundwater, energy, raw materials and mineral resources. Its objectives are to define: i) operational procedures for data management (Spatial Data Infrastructure, metadata and data specification), ii) user-oriented products and services including the preparation of innovative spin off projects based on AEGOS and an evaluation of the input of Interoperability and interdisciplinary in support of GEOSS iii) the African- European partner network, iv) a geoscience contribution to GEOSS, in the context of INSPIRE

Agency: Cordis | Branch: FP7 | Program: CP | Phase: ENERGY.2009.5.2.2 | Award Amount: 3.13M | Year: 2010

COMET aims at identifying and assessing the most cost effective CO2 transport and storage infrastructure able to serve the West Mediterranean area, namely Portugal, Spain and Morocco. This is achieved considering the time and spatial aspects of the development of the energy sector and other industrial activities in those countries as well as the location, capacity and availability of potential CO2 storage geological formations. Special attention is given to a balanced decision on transport modes, matching the sources and sinks, addressing safety and lifetime objectives, meeting optimal cost - benefit trade-off, for a CCS network infrastructure as part of an international cooperation policy. The need for a joint CCS infrastructure in the West Mediterranean is related to the geographical proximity, to the increasing connections between the energy and industrial sectors in the area, to the continuity of sedimentary basins that can act as possible storage reservoirs and to the existing experience in managing a large gas transport infrastructure, such as the natural gas pipeline coming through Morocco, to Spain and Portugal. The consortium is coordinated by INETI (Portugal), and comprises 7 research institutions, 4 Universities, 1 SME and 5 energy companies from 6 European countries and Morocco. COMET aims to optimise the connection between sources and sinks by comparing the several possible transport modes (pipelines, trains, ships and trucks) and existing and to be realized infrastructures and expects to find the least-cost transport mode and routes from clusters to sinks. It is expected that each source cluster will be rigorously matched to the most suitable sink, while minimising the required investment in infrastructures and taking advantage of the effect of scale associated to an integrated infrastructure. COMET will be an important step towards the safe and commercial deployment of large scale near zero emission power plants in SW Europe and North Africa.

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