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Article Dans Une Revue (Article De Synthèse) Journal of Energy Storage Année : 2023

Cogeneration: Another way to increase energy efficiency of hybrid renewable energy hydrogen chain – A review of systems operating in cogeneration and of the energy efficiency assessment through exergy analysis

Lingai Luo
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Christian Cristofari
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Résumé

The intermittence of renewable sources requires an efficient and sustainable technology for storing energy. Hydrogen storage system (HSS), consist of electrolyzer, storage system and electricity generator, is a promising solution, due to the high energy content and the pollution-free nature of hydrogen. However, the high expense is a major obstacle for the practical utilization of HSS. Cogeneration can be a feasible way to handle this issue, since recovery and utilization of the produced heat improve the efficiency of the global system. Due to the different natures of energy flows (i.e., power, heat, hydrogen) in the cogeneration systems, an exergy analysis is essential to assess the overall efficiency. In this paper, a state of the art of the existing hybrid renewable energy – HSS system operating in cogeneration is proposed including their technical description, their cost, their efficiency and the operating experience. Moreover, a review of the different ways to carry out an exergy analysis for these systems is also presented. First, the entire value chain of hydrogen is briefly described from the production through electrolysis water trough to its storage, its regeneration by means of fuel cell, its transportation and its use. Secondly, a detailed description of the existing hybrid renewable energy – HSS system operating in cogeneration is provided. Systems were classified according to their connection configuration (grid connected, local grid and stand-alone building). A third part contains the optimization methods that have been applied to this kind of system. Finally, last part focuses on exergy analysis including a definition of exergy concept followed by a review of exergy analysis carried out on CHP-systems. This synthesis work highlighted the positive impact of cogeneration on the global efficiency of HSS and showed that the exergy analysis is essential to assess the system and to determine which steps of the system need to be improved.
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Dates et versions

hal-04091885 , version 1 (09-05-2023)

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Citer

Lingai Luo, Christian Cristofari, Sarah Levrey. Cogeneration: Another way to increase energy efficiency of hybrid renewable energy hydrogen chain – A review of systems operating in cogeneration and of the energy efficiency assessment through exergy analysis. Journal of Energy Storage, 2023, 66, pp.107433. ⟨10.1016/j.est.2023.107433⟩. ⟨hal-04091885⟩
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