Experimental study on heat dissipation performance of automotive fuel cells
The proton exchange membrane fuel cell(PEMFC)serves as a widely used power generation device in transportation,energy storage,aerospace,and military applications owing to its high energy-efficient conversion rate,clean operation,and reliability.To address the challenges of PEMFC,specifically its high heat dissipation density,high heat generation,and low heat dissipation efficiency,an experimental bench for an automotive fuel cell heat dissipation system was constructed.This system incorporated four different flow heat exchangers,catering to a 15 kW PEMFC with a heat dissipation issue.The experimental setup employed two-phase cooling mediums,namely HFE-7100 and an aqueous ethylene glycol solution.The investigation focused on their thermal performance and system energy efficiency rating under different process heat exchangers and various medium flow rates at 35℃.The results showed that under the same flow path,HFE-7100 two-phase cooling medium exhibited an improved heat dissipation rate between 81.2%and 98.8%,with a system energy efficiency ratio(EER)improvement rate between 68.2%and 88.6%compared with ethylene glycol aqueous liquid cooling.Among the four different flow paths,flow path 3 demonstrated the best system heat dissipation and EER.Specifically,HFE-7100 two-phase cooling achieved heat dissipation and system EER of 14.4 kW and 20.5 kW/kW,while ethylene glycol aqueous liquid cooling reached 7.7 kW and 12.1 kW/kW,respectively.At a cooling medium flow rate of 4 L/min,the system exhibited better energy-saving effects,with the two-phase and liquid-cooling heat dissipation system EER reaching 20.9 and 10.5 kW/kW,respectively.
proton exchange membrane fuel cellheat exchangers for different processtwo-phase cooling mediumEER
国家科技期刊平台
NSTL
万方数据
维普
