科研之友
微信
新浪微博
Facebook
分享链接
摘要
The performance of proton electron membrane fuel cells (PEMFCs) is affected by many factors, including the relative humidity and pressure of the inlet gases, the temperature of the fuel cell stack, the transport of the reactants and byproducts, the dissipation of the reaction heat, and so on. Thus, to optimize the PEMFC performance over a range of operating conditions, the various components within the PEMFC system must be appropriately controlled. Accordingly, the present study proposes a sophisticated control system for a 1.0 kW PEMFC system comprising a fuel cell stack, an auxiliary power supply, a DC--DC (direct current--direct current) buck converter, and a DC--AC (direct current--alternating current) inverter. The control system is implemented using a programmable logic controller and is designed to optimize the system performance and safety in both the start-up phase and the long-term operation phase. Uniquely, the control system is interfaced with a user friendly human--machine interface, which not only permits the PEMFC system to be operated by individuals with no experience in the field, but also provides access to the controller via the Internet such that the system can be maintained and tuned by a qualified technician in a remote location. Overall, the PEMFC system and associated control scheme proposed in this study have considerable potential for commercialization as a reliable, low-cost solution for meeting the power supply requirements of small-scale residential and office users.
- 出版日期2013-1-1
