Song Ke, Cai Zhen, Huang Xing, Ma Haoran, Li Yanju, Huang Pengyu, Zhang Boqiang
School of Automotive Studies, Tongji University, Shanghai, 201804, China.
National Fuel Cell Vehicle and Powertrain System Engineering Research Center, Tongji University, Shanghai, 201804, China.
Heliyon. 2024 Oct 26;10(21):e39864. doi: 10.1016/j.heliyon.2024.e39864. eCollection 2024 Nov 15.
Compression-type air-conditioning heat pump systems used in high-temperature proton exchange membrane fuel cell (HT-PEMFC) buses significantly increase the vehicle's hydrogen consumption. This study introduces a lithium bromide (LiBr) absorption refrigeration air-conditioning system into a fuel cell bus, aiming to convert the high-quality waste heat produced by the HT-PEMFC into cooling and heating capabilities for balancing the temperature within the vehicle cabin and recover waste heat. Modeling and co-simulation of the HT-PEMFC, LiBr absorption refrigeration system, vehicle thermal model, and compression-type air-conditioning heat pump system were conducted using MATLAB/Simulink. The simulation results indicate that, compared with the traditional compression-type air-conditioning heat pump system, the LiBr absorption refrigeration system can save 6.13-18.17 % of hydrogen and improve the electrical energy and exergy efficiencies by 3.58-10.74 % and 3.74-11.22 %, respectively, under different driving scenarios. Using the LiBr absorption refrigeration system significantly enhances the vehicle's overall fuel utilization efficiency and driving range.
用于高温质子交换膜燃料电池（HT-PEMFC）公交车的压缩式空调热泵系统会显著增加车辆的氢气消耗。本研究将溴化锂（LiBr）吸收式制冷空调系统引入燃料电池公交车，旨在将HT-PEMFC产生的高品质废热转化为制冷和制热能力，以平衡车厢内温度并回收废热。利用MATLAB/Simulink对HT-PEMFC、LiBr吸收式制冷系统、车辆热模型和压缩式空调热泵系统进行了建模和联合仿真。仿真结果表明，与传统的压缩式空调热泵系统相比，LiBr吸收式制冷系统在不同驾驶场景下可节省6.13%-18.17%的氢气，并分别将电能效率和㶲效率提高3.58%-10.74%和3.74%-11.22%。使用LiBr吸收式制冷系统可显著提高车辆的整体燃料利用效率和续航里程。
