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Short-Term Optimization of a Combined Cycle Power Plant Integrated With an Inlet Conditioning Unit
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.ORCID iD: 0000-0002-7804-667X
University of Genoa. (Mechanical Enginering)
2021 (English)In: Journal of engineering for gas turbines and power, ISSN 0742-4795, E-ISSN 1528-8919, Vol. 143, no 9, article id 091013Article in journal (Refereed) Published
Abstract [en]

Under new scenarios with high shares of renewable electricity, combined cycle gas turbines (CCGTs) are required to improve their flexibility to help balance the power system. Simultaneously, liberalization of electricity markets and the complexity of its hourly price dynamics are affecting the CCGT profitability, leading the need for optimizing its operation. An inlet conditioning unit (ICU) offers the benefit of power augmentation and “minimum environmental load” (MEL) reduction by controlling the gas turbine (GT) inlet temperature using cold thermal energy storage (TES) and a heat pump (HP). Consequently, an evaluation of a CCGT integrated with this unit including a day-ahead optimized operation strategy was developed in this study. To establish the hourly dispatch of the power plant and the operation mode of the ICU, a mixed-integer linear programing (MILP) optimization was formulated, aiming to maximize the operational profit of the plant within a 24 h horizon. To assess the impact of the unit operating under this dispatch strategy, historical data have been used to perform annual simulations of a reference power plant located in Turin, Italy. Results indicate that the power plant's operational profit increases by achieving a wider operational range during peak and off-peak periods. For the specific case study, it is estimated that the net present value (NPV) of the CCGT integrated with the ICU is 0.5% higher than the CCGT without it. Results also show that the unit reduces the MEL by approximately 1.34% and can increase the net power output by 0.17% annually.

Place, publisher, year, edition, pages
2021. Vol. 143, no 9, article id 091013
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-299523DOI: 10.1115/1.4050856ISI: 000692136500007Scopus ID: 2-s2.0-85126559298OAI: oai:DiVA.org:kth-299523DiVA, id: diva2:1584048
Note

QC 20210917

Available from: 2021-08-10 Created: 2021-08-10 Last updated: 2022-06-25Bibliographically approved

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Mantilla, WeimarGarcía Frediani, JoséGuédez, Rafael

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