Universidade do Minho >
Escola de Engenharia da Universidade do Minho | School of Engineering at the University of Minho >
Departamento de Produção e Sistemas >
Centro de Engenharia de Sistemas de Produção >
CESP - Artigos em revistas científicas internacionais com arbitragem >
Please use this identifier to cite or link to this item:
|Title: ||Thermo-economic optimization of CHP systems : from large to small scale applications|
|Authors: ||Ferreira, Ana C. M.|
Nunes, Manuel L.
Leão, Celina Pinto
Teixeira, S. F. C. F.
Teixeira, J. C. F.
Martins, Luís Barreiros
|Keywords: ||Small-scale cogeneration|
|Issue date: ||2011|
|Publisher: ||Universidade Lusíada|
|Abstract: ||There is a growing potential for the use of small-scale cogeneration systems in the building sector, because this systems are able to produce both useful thermal energy and electricity from a single source. This fact represents a significant increase in the efficiency of energy conversion, when compared with the conventional electricity generation. The aim of this paper is the development of a thermo-economic model to optimize a small-scale cogeneration system able to deliver 125kW of thermal power to fulfil the base-heating load of a medium-size building. The objective function was defined as the maximization of the annual worth and six decision variables were also defined. The mathematical model was implemented using the Box method in MatLab® environment. The results show that the small CHP system discloses a positive annual worth for the simulated conditions. The fuel is the most predominant cost, which is significantly greater than the capital investment cost. The positive profits are due mainly to the great income from selling the total electricity that is produced to the grid. The study shows that the most relevant variables in micro-gas turbine system are the compressor pressure ratio, the turbine inlet temperature and the internal pre-heater effectiveness. The optimal solution results are strongly correlated with the electricity and fuel prices and with the components performance/cost assumptions considered in the model.|
|Appears in Collections:||CGIT - Artigos em revistas de circulação internacional com arbitragem científica|
CITEPE - Artigos em revistas de circulação internacional com arbitragem científica
CESP - Artigos em revistas científicas internacionais com arbitragem
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.