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Optimal design of hybrid RES-H2 systems towards residential energy coverage

Chousiadas Drosos

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Summary

The main objective of this thesis is the study and analysis of the simulation of a hybrid renewable energy sources system which simultaneously carries out the production of hydrogen through chemical electrolysis. The electrolysis of water takes place in the electrolyzer which is fed through excess energy managed by energy management algorithm.Initially, the design of the hybrid system is analyzed in the individual mechanical elements that constitute it as well as the operation of the system. The operation of the installation is analyzed through a simulation algorithm developed in MATLAB programming environment. The simulation algorithm is presented in 4 parts (input, processing, simulation and output of results) in order to understand the operation of the computational algorithm as well as the subjects and mathematical models that constitute it.Then, the control variable of the state of charge of the battery is presented through mathematical models, and the role it takes in the energy management algorithm for the optimal distribution of the generating energy. Continuing, pre – existing mathematical models and equations of techno – economic subjects are analyzed and compared with mathematical models based on the Cost of Energy and the Capital Recovery Factor.Finally, the simulation of plant optimization scenarios is carried out in which it is being requested the optimal sizing of the immediate load coverage of houses as well asthe achievement of a specific hydrogen production target. In addition, the installation is evaluated by comparing the mathematical models analyzed in previous chapters.

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