The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Massimiliano Vellini - One of the best experts on this subject based on the ideXlab platform.
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high efficiency cogeneration electricity from cogeneration in chp plants
Energy Procedia, 2015Co-Authors: Mauro Gambini, Massimiliano VelliniAbstract:Abstract In 2004, the European Parliament and the Council of the European Union adopted the Directive 2004/8 EC whose purpose is to increase energy efficiency and develop high efficiency cogeneration of heat and power. Italy brought into force this law by means of the Legislative Decree February 8, 2007, n. 20 and two ministerial Decrees (the ministerial Decree of Environment Ministry (August 4, 2011), that integrates the Decree n.20, and the ministerial Decree of Ministry of Economic Development (September 5, 2011), that lays down the conditions and procedures for access to the support system of cogeneration). From January 1, 2011, the legislative and incentive cogeneration context is radically changed and, consequently, new boundary conditions must be taken into account in order to evaluate performance of cogeneration plants. Therefore, in this paper authors have analysed the different types of plants in operation in Italy and have calculated the percentage of electricity from cogeneration of each type of plant, taking into account the typical operating parameters. The result of this paper may therefore be a valuable tool for the operators of the cogeneration sector in order to identify the suitability of an investment in this sector.
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high efficiency cogeneration performance assessment of industrial cogeneration power plants
Energy Procedia, 2014Co-Authors: Mauro Gambini, Massimiliano VelliniAbstract:In 2004, the European Parliament and the Council of the European Union adopted the Directive 2004/8 EC whose purpose is to increase energy efficiency and develop high efficiency cogeneration of heat and power. Italy brought into force this law by means of the Legislative Decree February 8, 2007, n. 20: from January 1, 2011, the high efficiency cogeneration is the cogeneration that meets the requirements of Directive 2004/8/EC. Then, Italy adopted two ministerial Decrees: the ministerial Decree of Environment Ministry (August 4, 2011), that integrates the Decree n.20, and the ministerial Decree of Ministry of Economic Development (September 5, 2011), that lays down the conditions and procedures for access to the support system of cogeneration: for each year in which the requirements of high efficiency cogeneration are met, the cogeneration units are entitled to energy efficiency certificates (White Certificates), whose number is proportional to the energy saving achieved. Therefore, from January 1, 2011 the legislative and incentive cogeneration context is radically changed and, consequently, new boundary conditions must be taken into account for feasibility studies and performance assessments of cogeneration plants. So, in this paper we want to evaluate the impact of this new legislative context on the competitiveness of the various cogeneration technologies. To this end, after an illustration of the new criteria to meet the qualifications of the high efficiency cogeneration, a comparison between different generation technologies will be developed by highlighting the impact of the new incentive context.
Mauro Gambini - One of the best experts on this subject based on the ideXlab platform.
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high efficiency cogeneration electricity from cogeneration in chp plants
Energy Procedia, 2015Co-Authors: Mauro Gambini, Massimiliano VelliniAbstract:Abstract In 2004, the European Parliament and the Council of the European Union adopted the Directive 2004/8 EC whose purpose is to increase energy efficiency and develop high efficiency cogeneration of heat and power. Italy brought into force this law by means of the Legislative Decree February 8, 2007, n. 20 and two ministerial Decrees (the ministerial Decree of Environment Ministry (August 4, 2011), that integrates the Decree n.20, and the ministerial Decree of Ministry of Economic Development (September 5, 2011), that lays down the conditions and procedures for access to the support system of cogeneration). From January 1, 2011, the legislative and incentive cogeneration context is radically changed and, consequently, new boundary conditions must be taken into account in order to evaluate performance of cogeneration plants. Therefore, in this paper authors have analysed the different types of plants in operation in Italy and have calculated the percentage of electricity from cogeneration of each type of plant, taking into account the typical operating parameters. The result of this paper may therefore be a valuable tool for the operators of the cogeneration sector in order to identify the suitability of an investment in this sector.
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high efficiency cogeneration performance assessment of industrial cogeneration power plants
Energy Procedia, 2014Co-Authors: Mauro Gambini, Massimiliano VelliniAbstract:In 2004, the European Parliament and the Council of the European Union adopted the Directive 2004/8 EC whose purpose is to increase energy efficiency and develop high efficiency cogeneration of heat and power. Italy brought into force this law by means of the Legislative Decree February 8, 2007, n. 20: from January 1, 2011, the high efficiency cogeneration is the cogeneration that meets the requirements of Directive 2004/8/EC. Then, Italy adopted two ministerial Decrees: the ministerial Decree of Environment Ministry (August 4, 2011), that integrates the Decree n.20, and the ministerial Decree of Ministry of Economic Development (September 5, 2011), that lays down the conditions and procedures for access to the support system of cogeneration: for each year in which the requirements of high efficiency cogeneration are met, the cogeneration units are entitled to energy efficiency certificates (White Certificates), whose number is proportional to the energy saving achieved. Therefore, from January 1, 2011 the legislative and incentive cogeneration context is radically changed and, consequently, new boundary conditions must be taken into account for feasibility studies and performance assessments of cogeneration plants. So, in this paper we want to evaluate the impact of this new legislative context on the competitiveness of the various cogeneration technologies. To this end, after an illustration of the new criteria to meet the qualifications of the high efficiency cogeneration, a comparison between different generation technologies will be developed by highlighting the impact of the new incentive context.
Michel X Goemans - One of the best experts on this subject based on the ideXlab platform.
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minimum bounded degree spanning trees
Foundations of Computer Science, 2006Co-Authors: Michel X GoemansAbstract:We consider the minimum cost spanning tree problem under the restriction that all degrees must be at most a given value k. We show that we can efficiently find a spanning tree of maximum degree at most k+2 whose cost is at most the cost of the optimum spanning tree of maximum degree at most k. This is almost best possible. The approach uses a sequence of simple algebraic, polyhedral and combinatorial arguments. It illustrates many techniques and ideas in combinatorial optimization as it involves polyhedral characterizations, uncrossing, matroid intersection, and graph orientations (or packing of spanning trees). The result generalizes to the setting where every vertex has both upper and lower bounds and gives then a spanning tree which violates the bounds by at most two units and whose cost is at most the cost of the optimum tree. It also gives a better understanding of the subtour relaxation for both the symmetric and asymmetric traveling salesman problems. The generalization to l-edge-connected subgraphs is briefly discussed.
Paul H Robinson - One of the best experts on this subject based on the ideXlab platform.
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obama s get out of jail free Decree
Social Science Research Network, 2015Co-Authors: Paul H RobinsonAbstract:While agreeing that sentences for nonviolent drug offenses are too long, this Wall Street Journal op-ed piece argues that the large-scale clemency program planned by President Obama is misguided. It sets a dangerous precedent for using the clemency power beyond its traditional and intended purpose of providing a last-resort check on fairness and justice errors in individual cases, and instead uses the power to set sentencing policy. While many people will like the results of the current program, they will be less than happy when some future president uses it as precedent to promote a sentencing policy of which they disapprove.
Phyllis Wan - One of the best experts on this subject based on the ideXlab platform.
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nonstandard regular variation of in degree and out degree in the preferential attachment model
Journal of Applied Probability, 2016Co-Authors: Gennady Samorodnitsky, Sidney I Resnick, Don Towsley, Richard A Davis, Amy D Willis, Phyllis WanAbstract:The research of the authors was supported by MURI ARO Grant W911NF-12-10385 to Cornell University
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nonstandard regular variation of in degree and out degree in the preferential attachment model
arXiv: Probability, 2014Co-Authors: Gennady Samorodnitsky, Sidney I Resnick, Don Towsley, Richard A Davis, Amy D Willis, Phyllis WanAbstract:For the directed edge preferential attachment network growth model studied by Bollobas et al. (2003) and Krapivsky and Redner (2001), we prove that the joint distribution of in-degree and out-degree has jointly regularly varying tails. Typically the marginal tails of the in-degree distribution and the out-degree distribution have different regular variation indices and so the joint regular variation is non-standard. Only marginal regular variation has been previously established for this distribution in the cases where the marginal tail indices are different.
