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Article Title: Optimal sizing of thermal energy storage systems for CHP plants considering specific investment costs: A case study
Specialization Codes: 15.1 - Energy Data, Modeling, and Policy Analysis, 15.5 - Other, 3.6 - Other, 6.1 - Generation Technologies, 8 - Energy and the Environment, 9.1 - Energy Production and Transformation,
Authors: Pablo Benalcazar
Publication Date: 25 June 2021
Description: In the next decades, energy storage technologies will play a major role in decarbonizing the European heating and cooling sector. In this regard, the deployment of complementary technologies is of paramount importance for the energy transformation of the Polish heating sector. This work addresses the challenge of sizing large-scale thermal energy storage (TES) systems for combined heat and power (CHP) plants connected to district heating networks and participating in day-ahead electricity markets. In this paper, a method based on a mixed-integer linear programming approach is proposed to find the optimal capacity of TES units connected to coal-fired CHP systems. The model considers the specific investment costs of the storage technology and optimizes the annual operation scheduling of the CHP-TES system. The model is applied to the case study of a coal-fired CHP system. Four scenarios are used to investigate the performance of the CHP system and evaluate the effects of rising carbon prices on the optimal capacity of the TES unit. The results reveal that the integration of the TES leads to a significant drop in the utilization of the heat-only boilers, helping mitigate fuel and environmental costs.
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