Progress of Cryogenics and Isotopes Separation

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The National Conference with international participation on New Cryogenic and Isotope Technologies for Energy and Environment - EnergEn 2018 is organized by the National Research-Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Valcea with the scientific participation of the University of Pitesti and the University of Craiova and will be held at Baile Govora, in 2018.
A HYBRID ENERGY STORAGE SYSTEM AND CONTROL STRATEGY FOR STAND-ALONE APPLICATIONS USING RENEWABLE ENERGY SOURCES Print

A HYBRID ENERGY STORAGE SYSTEM AND CONTROL STRATEGY FOR STAND-ALONE APPLICATIONS USING RENEWABLE ENERGY SOURCES

Alexandru Ciocan*, Mihai Balan, Mihaela Pislaru, Alexandru Rizoiu, Andrei Constantin

National Research and Development Institute for Cryogenics and Isotopic Technologies - ICSI Rm. Valcea, Uzinei Street no. 4, PO Box Râureni 7, 240050, Râmnicu Vâlcea, Romania

 

ABSTRACT

The present work proposes a small scale hybrid energy storage system for the energy provided by renewable energy sources (RES) through a wind turbine, several photovoltaic panels and a solar concentrator equipped with a Stirling engine (CSP). As regards the CSP equipped with Stirling engine is well known its working principle and the fact that when it operates can provide energy in cogeneration. The obtained energy from RES could be stored as electricity in Li-Ion batteries, and as thermal energy in the form of hot water used especially as domestic hot water and for heating of the buildings.

In this paper the authors present a hybrid energy storage system together with an application capable to decide at any moment of time what kind of energy to store. By manipulation of the solar concentrator it may be decided if the system will store electricity or electrical and thermal energy in cogeneration. The boiler for thermal energy storage is provided with an internal resistor that could convert electricity into heat if the batteries are fully charged and there is no need for electricity. This option comes in order to cover the consumer’s needs from two points of view, electrical and thermal, and can contribute to achieve the objective of minimizing the cost of energy storage.

Keywords: renewable energy, combined heat and power, energy storage, solar concentrator.

 

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*Corresponding author: Alexandru Ciocan phone: 0250 732744, fax: 0250 732746, e-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it