Technical and economic assessment of a SOFC-based energy system for combined cooling, heating and power. (15th April 2017)

• Record Type: Journal Article
• Authors: Facci, Andrea L.; Cigolotti, Viviana; Jannelli, Elio; Ubertini, Stefano
• Is Part Of: Applied energy. Volume 192(2017)
• Page Start: 563
• Page End: 574
• Publication Date: 2017-04-15
• Subjects: Trigeneration -- Distributed generation -- CHCP -- Fuel cells -- SOFC; Power (Mechanics) -- Periodicals; Energy conservation -- Periodicals; Energy conversion -- Periodicals; 621.042
• DOI: 10.1016/j.apenergy.2016.06.105
• Languages: English
• ISSNs: 0306-2619

Abstract

Highlights: Assessment of the performances of a SOFC based CHCP plant for residential applications. Optimal plant design as a function of investment cost and control strategy. Optimized control strategies to minimize the costs and primary energy consumption. Abstract: Here we present the technical and economical performances of a small scale trigeneration power plant based on solid oxide fuel cells and designed for a small residential cluster (i.e. 10 apartments). The energy system features a natural gas solid oxide fuel cell, a boiler, a refrigerator, and a thermal storage system. We compare different power plant configurations varying the size of the fuel cell and the refrigeration technology to satisfy the chilling demand (i.e. absorption or mechanical chiller). Given that the ability to meet the power demand is crucial in this kind of applications, the plant performances are assessed following an optimal control strategy, as a function of different energy demand profiles and electricity prices, and of rated and part load efficiencies of each energy converter. The optimization of the energy system operating strategy is performed through a graph theory-based methodology. Results are provided in terms of electrical and thermal efficiency, operating strategy, as well as economic saving, primary energy consumption reduction, and pay back period, considering different capital costs of the fuel cell.