1. Novel kW scale hydrogen energy storage system utilizing fuel cell exhaust air for hydrogen desorption process from metal hydride reactor.
- Author
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Khayrullina, Aliya Glagoleva, Blinov, Dmitry, and Borzenko, Vasily
- Subjects
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ENERGY storage , *HYDROGEN as fuel , *HYDROGEN storage , *HYDRIDES , *FUEL cells , *OXYGEN reduction , *PROTON exchange membrane fuel cells - Abstract
In the narrative of changing energy production environment, renewable sources of energy provide a fundamental basis for the growth of energy storage technologies. In particular, many settlements in Russia and other countries are located outside the centralized grids. With the goal of replacing diesel engines, a pilot project with solar panels produced 30 000 kWh. However, a support of energy storage systems is needed to ensure higher replacement percentage. The present paper introduces the development of a novel kW-scale power production unit that utilizes metal-hydride (MH) energy storage and 1 kW PEM fuel cell (FC). In the effort to enable the technology for autonomous applications, the novel concept of using FC exhaust air for hydrogen desorption process replacing an external heating agent was successfully proved. In the first two experiments, the limitations of the initial stage of the MH reactor were formulated. Warming up speed of the MH reactor was not sufficient to support the necessary hydrogen pressure level output. Third and fourth experiments provide possible solutions to this limitation: (i) higher load on the FC enable satisfactory warm-up speed of the MH reactor, (ii) higher initial pressure of MH reactor charge mitigates an initial pressure drop during the FC startup procedures. • A 1 kWh hydrogen storage system was designed, developed and tested. • The system utilizes exhaust heat from FC for the desorption process of MH reactor. • The system has 13 st. L/min H 2 consumption, 700 st. L storage capacity. • Higher initial pressure of MH reactor charge mitigates a pressure drop during startup. • Higher load on the FC enables satisfactory warm-up speed of the MH reactor. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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