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Allocation of economic costs in trigeneration systems at variable load conditions including renewable energy sources and thermal energy storage

Eduardo A. Pina, Miguel A. Lozano and Luis M. Serra

Energy, 2018, vol. 151, issue C, 633-646

Abstract: As energy systems become more and more complex, the issue of the appropriate way to allocate the cost of the resources consumed increases because the way in which allocation is made directly affects the prices of the products obtained and, thus, the consumers' behavior. Thermoeconomics has been used to explain the cost formation process in complex energy systems. The thermoeconomic analysis of a trigeneration system including renewable energy sources (RES) and thermal energy storage (TES) was developed to determine the energy, capital, and total unit costs of the internal flows and final products. This work addresses issues not yet deeply studied in thermoeconomics, namely the joint production of energy services in dynamic energy systems and the incorporation of TES, RES (photovoltaic panels) and a component with different products for each operation mode (heat pump producing heat in heating mode and cooling in cooling mode). The interconnection between charging and discharging periods through the TES units was explored, allowing the discharged flow to be traced back to its production period. The trigeneration system resulted more profitable than the reference system, with total cost savings of 9942 €/yr, which was translated into the lower annual total unit costs of the final products.

Keywords: Cost allocation; Energy systems; Renewable energy; Thermal storage; Thermoeconomics; Trigeneration (search for similar items in EconPapers)
Date: 2018
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