CAJ | 학술논문

针对目前金属氢化物储氢技术中面临的粉化后传热性能不佳等问题,采用膨胀石墨为基质配制固化的金属氢化物吸附剂.使用Hotdisk热物性分析仪,测试了固化吸附剂的热物性参数,并对固化吸附床的传热及相应的储氢特性进行了仿真.研究结果表明,固化混合吸附剂相对于散装的储氢合金,轴向导热系数最高提高了52倍左右,径向导热系数最高提高了12倍左右.通过仿真发现,在相同的80 ℃热源温度下,固化混合吸附床所需要的加热时间相对于散装储氢合金吸附床可以缩短17%,吸氢速率可以提高24%.
침대목전금속경화물저경기술중면림적분화후전열성능불가등문제,채용팽창석묵위기질배제고화적금속경화물흡부제.사용Hotdisk열물성분석의,측시료고화흡부제적열물성삼수,병대고화흡부상적전열급상응적저경특성진행료방진.연구결과표명,고화혼합흡부제상대우산장적저경합금,축향도열계수최고제고료52배좌우,경향도열계수최고제고료12배좌우.통과방진발현,재상동적80 ℃열원온도하,고화혼합흡부상소수요적가열시간상대우산장저경합금흡부상가이축단17%,흡경속솔가이제고24%.
The main technical problem for hydrogen storage metal hydrides is that the heat transfer performances of which is not so good after pulverization. To improve the thermal conductivity of hydrides powder, a new type solidified adsorbent made of metal hydride and expanded graphite was developed. For the heat transfer research of solidified compound adsorbents, Hotdisk thermal constant analyzer was used to analyze the characters of the compacted adsorbent, and a simulation was also performed to analyze the heat transfer performance of the solidified compound adsorbent. The results show that the axial thermal conductivity of compacted adsorbents is 52 times of uncompressed metal hydrides at most, while the radial thermal conductivity is 12 times of uncompressed metal hydrides at most. The simulation of the heat transfer during adsorption indicates that the heating time for the adsorbent reduces by 17%, and the rate of hydrogen adsorption increases by 24%.