Ram air compensation analysis of fuel cell vehicle cooling system under driving modes

Three driving cycles were applied to investigate the responses of the cooling system under driving conditions. Three driving conditions considering ram air compensation were investigated to evaluate the cooling system operating trajectory. When the ram air compensation is considered, the cooling system operating trajectory and parasitic power can be accurately predicted. The control adjustment also needs to optimize the parasitic power. As a consequence, the trajectory of system pressure line 1 was found to be more effective for energy saving.