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Energy and economic analysis of an ICE-based variable speed-operated micro-cogenerator

Caresana, Flavio, Brandoni, Caterina, Feliciotti, Petro and Bartolini, Carlo Maria (2010) Energy and economic analysis of an ICE-based variable speed-operated micro-cogenerator. Applied Energy, 88 (3). pp. 659-671. [Journal article]

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DOI: doi:10.1016/j.apenergy.2010.08.016


Micro-combined heat and power (CHP) systems are a key resource to meet the EUCO2 reduction agreed in the Kyoto Protocol. In the near future they are likely to spread significantly through applications in the residential and service sectors, since they can provide considerably higher primary energy efficiencies than plants generating electricity and heat separately. A 28 kWe natural gas, automotive-derived internal combustion engine CHP system was modeled with a view to comparing constant and variable speed operation modes. Besides their energy performances, the paper addresses the major factors involved in their economic evaluation and describes a method to assess their economic feasibility. Typical residential and service sector applications were chosen as test cases and the results discussed in terms of energy performances and of profitability. They showed that interesting savings can be obtained with respect to separate generation, and that they are higher for the household application in variable speed operating conditions. In fact the plant’s energy performance is greatly enhanced by the possibility, for any given power, to regulate the engine’s rotational speed. From the economic viewpoint, despite the higher initial cost of the variable speed concept, the system involves a shorter pay-back period and ensures greater profit.

Item Type:Journal article
Faculties and Schools:Faculty of Art, Design and the Built Environment
Faculty of Art, Design and the Built Environment > School of the Built Environment
Research Institutes and Groups:Built Environment Research Institute
Built Environment Research Institute > Centre for Sustainable Technologies (CST)
ID Code:29338
Deposited By: Dr Caterina Brandoni
Deposited On:08 May 2014 12:19
Last Modified:08 May 2014 12:19

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