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Patlitzianas K.D.,Center for Renewable Energy Sources CRES | Flamos A.,University of Piraeus
Energy Sources, Part B: Economics, Planning and Policy | Year: 2016

Hydrocarbon-concentrated economies would have to determine prospects and opportunities for the development of a more sustainable future. The vast unexploited renewable energy sources (RES) potential of Gulf Cooperation Council (GCC) states in conjunction with increased cash liquidity within new climate regimes is paving the way toward technologies based on renewables. In this respect, the objective of this paper is to highlight the current development of RES in the region that constitutes the GCC and to discuss the opportunities for wide diffusion and large-scale implementation. Finally, the key economic, regulatory, market, and technical RES exploitation driving forces are presented per country. © 2016 Taylor & Francis Group, LLC. Source

Carvalho A.D.,Polytechnic Institute of Coimbra | Mendrinos D.,Center for Renewable Energy Sources CRES | De Almeida A.T.,University of Coimbra
Renewable and Sustainable Energy Reviews | Year: 2015

The main purpose of this study is to assess the impacts in the European Union (EU) of a fuel switching strategy focused on the replacement of Natural Gas (NG) boilers by high efficiency Heat Pumps (HPs) supplied by electricity with a fast decreasing carbon content. Additionally, to illustrate the high performance of heat pumps, the experimental results of an advanced Ground Source Heat Pump (GSHP) system installed in a service building in Portugal are presented. Based on the analysis carried out, it was found that the large scale use of heat pumps for space heating in buildings can contribute to significant primary energy and CO2 emissions savings, when compared to NG boilers. In Europe, in 2050, through the replacement NG space heating in buildings by high efficiency heat pumps, around 60% of the primary energy required and 90% of the associated CO2 emissions can be saved. At global EU level, in 2050 the European NG dependency on external suppliers can be decreased to 50% and an additional contribution of 5.6% for Renewable Energy Sources (RES) share in the total final energy consumption can be achieved. Furthermore, HPs can also play an important role towards exploiting the increasing penetration of renewable electricity generation, effectively contributing to the replacement of fossil fuels and in particular to decrease the growing natural gas dependency of Europe from risky and unstable countries. © 2015 Elsevier Ltd. All rights reserved. Source

Tzen E.,Center for Renewable Energy Sources CRES | Papapetroub M.,WIP Renewable Energies
Desalination and Water Treatment | Year: 2012

The balance between water demand and availability has reached a critical level in many areas of Europe, the result of over-abstraction and prolonged periods of low rainfall or drought. Desalination of seawater and brackish water is one of the alternatives for ensuring a reliably supply of drinking water. Renewable energy sources (RES) coupled to desalination offers a promising prospect for covering the fundamental needs of power and water. Various initiatives and projects over the past few years have been covering the field of RE-desalination. The project entitled "Promotion of RES for Water Production through Desalination, ProDes" started on the 1st of October 2008 and it will run for two years. The ProDes project has been carefully designed in order to build on the past and exiting efforts and coordinate its activities with them in order to maximize the expected outcomes. The present paper presents the first results of the project and its general progress. © 2012 Desalination Publications. Source

Seferis P.,University of Strathclyde | Strachan P.,University of Strathclyde | Dimoudi A.,Democritus University of Thrace | Androutsopoulos A.,Center for Renewable Energy Sources CRES
Energy and Buildings | Year: 2011

The need for environmental friendly and energy efficient building design has stimulated the design of new facade technologies, including various configurations of double skin facades. This paper investigates the thermal performance of a ventilated wall, both for heating and cooling. A thermal analysis was carried out, paying special attention to the characterization of the heat convection resulting from the buoyancy-induced flow in the open air channel which proved to be a critical aspect of the ventilated wall's behaviour. An integrated thermal and air flow model for the entire system was developed. A model of the ventilated wall construction was developed with the ESP-r simulation program and checked against experimental data from a real-scale test cell facility. The thermal benefits of adding a radiant barrier layer were also investigated. The results showed that this layer was beneficial in terms of the energy performance of the construction. Also, the comparison between the experimental and simulation model results showed satisfactory levels of convergence with the exception of the night hours during the summer period. A sensitivity analysis was also undertaken in order to investigate the main factors and the extent of their effect on the temperature variation inside the ventilated facades. © 2011 Elsevier B.V. All rights reserved. Source

Patlitzianas K.D.,Center for Renewable Energy Sources CRES
Renewable Energy | Year: 2011

Until now, there are some specific constraints that hinder development of solar energy in Egypt. However, Egypt has an adequate sunshine, an extended territory free of inhabitants and the "political will" of its government to reach a share of 20% from RES in the national energy balance by 2020. As a result, the business opportunities for solar energy development in Egypt are really significant. The scope of the paper is to provide insight to the possible investment opportunities of solar energy in Egyptian market, based on a current and wide analysis. Indeed, Egypt is an interesting example to show the practical possibilities of the development of Solar Energy in Southern Mediterranean countries. Based on the excellent collaboration between the European Commission and the Egyptian authorities, the current sector is of high interest for developing European entrepreneurship in Egypt. An appropriate approach was developed for the overview as well as analysis of the business opportunities in Egyptian solar energy market, under the umbrella of a Hellenic Aid programme (2009-2010). © 2011 Elsevier Ltd. Source

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