Abstract
Abstract - Polymer electrolyte membrane fuel cell(PEMFC) requires cooling system to maintain the proper operating temperature(about 65℃∼75℃) because the efficiency and power are affected by operating temperature. In order to retain the operating temperature of PEMFC, cooling system and coolant control logic are needed. Hardware-in-the-loop simulation(HILS) is one of effective methods to study and evaluate control algorithm. In this paper, the HILS system was designed to study the coolant control algorithm. The models of HILS system consisted of PEMFC, heat exchanger, and external environment associated with temperature. The hardwares in HILS system are 3-way valves, pumps, and a heat exchanger. The priority control and the control target temperature were investigated to improve the control performance using HILS. The 3-way valve in 1 st cooling circuit was selected as priority control target. The under limit value of 2 nd 3-way valve set as a function of PEMFC power and 2 nd circuit coolant temperature to correct temperature control performance. As a result, the temperature of PEMFC is stably controlled.
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