Abstract

A hydrogen fuel cell vehicle is paid attention as next-generation transportation due to eco-friendly characteristics without emissions and competitive performance to internal combustion engines. Recently, a fuel cell heavy duty truck is investigated for medium to long-distance logistics transportation. Since heavy duty hydrogen electric trucks require high power demand, the proportional heat generation is very acute.

In this study, the hydrogen fuel cell truck model is developed to understand the various configuration of cooling arrangement for high performance operation of fuel cell system. The vehicle model is composed of modular hydrogen fuel cell model, thermal management system model, and vehicle model. Since the required power of hydrogen fuel cell truck is significantly increased over driving cycle, the efficient thermal management system should be included. However, since the packaging space of cooling system is insufficient, it is required to optimize cooling system. This study investigated the performance of various cooling configuration including cascade cooling. The performance index is ITAE (Integral of time weighted absolute error) that makes clear comparison among configurations. The energy consumption rate of the cooling system shows that cascade cooling arrangement is effective for maintaining the temperature modular stack. It is also effective for reduction of parasitic loss of cooling system.

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