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Entropy 2016, 18(3), 71; doi:10.3390/e18030071

Off-Design Modeling of Natural Gas Combined Cycle Power Plants: An Order Reduction by Means of Thermoeconomic Input–Output Analysis

Department of Energy, Politecnico di Milano, Via Lambruschini 4, 20156 Milan, Italy
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Vittorio Verda
Received: 10 September 2015 / Revised: 5 February 2016 / Accepted: 10 February 2016 / Published: 26 February 2016
(This article belongs to the Special Issue Thermoeconomics for Energy Efficiency)
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Abstract

In a European context characterized by growing need for operational flexibility across the electricity sector, the combined cycle power plants are increasingly subjected to cyclic operation. These new operation profiles cause an increase of production costs and decrease of revenues, which undermines the competitiveness of the combined cycles. Power plant operators need tools to predict the effect of off-design operation and control mechanisms on the performance of the power plant. Traditional Thermodynamic or Thermoeconomic models may be unpractical for the operators, due to their complexity and the computational effort they require. This study proposes a Thermoeconomic Input–Output Analysis model for the on- and off-design performance prediction of energy systems, and applies it to La Casella Natural Gas Combined Cycle (NGCC) power plant, in Italy. It represents a stand-alone, reduced order model, where the cost structure of the plant products and the Thermoeconomic performance indicators are derived for on- and off-design conditions as functions of the load and of different control mechanisms, independently from the Thermodynamic model. The results of the application show that the Thermoeconomic Input–Output Analysis model is a suitable tool for power plant operators, able to derive the same information coming from traditional Thermoeconomic Analysis with reduced complexity and computational effort. View Full-Text
Keywords: thermoeconomic input–output analysis; natural gas combined cycle; flexibility thermoeconomic input–output analysis; natural gas combined cycle; flexibility
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Keshavarzian, S.; Gardumi, F.; Rocco, M.V.; Colombo, E. Off-Design Modeling of Natural Gas Combined Cycle Power Plants: An Order Reduction by Means of Thermoeconomic Input–Output Analysis. Entropy 2016, 18, 71.

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