Economic Assessment of Cogeneration Systems in Operation (original) (raw)

2020, Energies

A systematic method to evaluate the economic operating performance of existing combined heat and power (CHP) or combined cooling heat and power (CCHP) generation systems is applied. Two key performance indicators are selected to evaluate both the technical and the economic performance, based on operating recording data; the capacity factor and the capital recovery. The case study for eight projects in Athens is presented with the purpose to reveal the current situation of CHP in Greece and identify reasons that are hindering its penetration. Interesting conclusions were reached from the analysis. Only two out of the eight projects managed to achieve the break-even point in less than four years since the beginning of their operation, while oversizing phenomena were noticed in many cases leading in extremely low capacity factors.

Market and Development Trends in Cogeneration and Combined Heat and Power Plants

Acta Polytechnica CTU Proceedings, 2018

The transition of energy mix in Europe is placing greater focus on energy efficiency. Lawmakers in some of EU countries have already recognized that combined heat and power generation (cogeneration, CHP) can help increase energy efficiency. Targeted promotion and subsidization have raised the cost-effective profitability of cogeneration plants significantly. But how can the economic value of this investment be maximized?

Energy versus economic effectiveness in CHP (combined heat and power) applications: Investigation on the critical role of commodities price, taxation and power grid mix efficiency

Starting from PES (primary energy saving) and CSR (cost saving ratio) definitions the work pinpoints a " grey area " in which CHP (combined heat and power e cogeneration) units can operate with profit and negative PES. In this case, CHP can be profitably operated with lower efficiency with respect to separate production of electrical and thermal energy. The work defines the R-index as the ratio between the cost of fuel and electricity. The optimal value of R-index for which CHP units operate with both environmental benefit (PES > 0) and economic profitability (CSR > 0) is the reference value of electrical efficiency, h el_ref , of separate production (national power grid mix). As a consequence, optimal R-index varies from Country to Country. The work demonstrates that the value of R corresponds to the minimum value of electrical efficiency for which any power generator operates with profit. The paper demonstrates that, with regard to the profitability of cogeneration, the ratio between the cost of commodities is more important than their absolute value so that different taxation of each commodity can be a good leverage for energy policy makers to promote high efficiency cogeneration, even in the absence of an incentive mechanism. The final part of the study presents an analysis on micro-CHP technologies payback times for different European Countries.

Economical Evaluation of the Project on Replacement of Heating Plant with Co-Generation Heat and Power Plant by the End of 2030

Metalurgia international

The paper focuses on the project of replacement of district heating plant (HP Doboj) with the so-called combined cycles of simultaneous production (co-generation) of useful mechanical operations, i.e. electric energy on the one hand and heat energy on the other hand in heat and power plants (CHP Doboj). This would enable saving of primary energy in comparison to separated production of heat and electricity. This would also help increase its operation time and at the same time its buildings would undergo necessary refurbishment. The economic-financial evaluation of the project of CHP Doboj shows that there are relevant economic parameters for further elaboration and continuation with high processing level designs. The evaluation did not take into account the expected benefits related to the generation of combined production, i.e. higher energy efficiency compared to that produced by the present condensation thermal plants in Bosnia and Herzegovina. Combined plants certainly represent...

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