本文主要研究内容
作者倪路(2019)在《冷壁降温系统热力学参数及降温效果的研究》一文中研究指出:冷壁降温是指通过在巷道壁面覆盖换热器组成的吸热系统,吸收巷道内热量,达到降温的目的。本文介绍了冷壁降温系统在巷道内的布置方式并搭建了实验平台,通过六组冷壁降温实验得到了单片换热器中流速与换热器进出口温差的关系为(35)T(28)0.88-0.81v(0.3m/s≤v≤0.8m/s),计算了换热器外表面和巷道内空气的对流换热系数为2.1W/(m2×K),单片换热器的平均吸热量为71.8W,并通过数值模拟验证了实验的准确性。冷壁降温系统的降温效果受热力学参数的制约,本文分析了系统的热力学参数:流速(0.01m/s≤v≤0.2m/s),管间距(75mm≤D≤150mm),巷道壁面温度(35℃≤Tw≤50℃)和进口水温(2℃≤Tin≤22℃)对降温效果的影响,结果表明:流速与换热器进出口温差和换热器外表面平均温度成反比,与吸热量成正比;管间距与换热器进出口温差与吸热量成反比,与换热器外表面平均温度成正比;进口水温与换热器进出口温差和吸热量成反比,与换热器外表面平均温度成正比;流速大,管间距小,进口水温低都会增加冷壁降温系统的降温效果,并得出了不同巷道壁面温度下流速,管间距,进口水温与换热器外表面平均温度和吸热量的关系以及各参数对吸热量的影响程度,在应用时应根据需要选择合适的热力学参数。在研究冷壁降温系统对巷道的降温效果时,介绍了冷壁降温技术的应用流程,并以一条500m巷道为例,验证冷壁降温系统的降温效果。通过计算得到了没有采用冷壁降温技术时的巷道风温变化曲线,风流在500m处达到30.17℃,再计算巷道两侧采用冷壁降温后的风温变化曲线,风流在500m处下降到27.54℃,达到降温要求;进而分别计算出巷道在不同覆盖面积比下的风温变化曲线及达到28℃的通风距离。结果表明:随着巷道冷壁面覆盖面积的增加,风流在同一位置的温度逐渐降低,降温效果越显著。且冷壁降温系统在风温越低处开始布置降温效果越显著,当现有换热器参数无法满足降温需求时,降低换热器进口水温和减小管间距可以有效的延长巷道的通风距离。冷壁降温系统在应用中,为保证管路各处压差稳定,铺管方式尽量使进水管与出水管流向一致。单片换热器的流动阻力为353.3Pa,在500m巷道中,单侧冷壁面的流动阻力为2478.9Pa,需水量为4.43L/s。
Abstract
leng bi jiang wen shi zhi tong guo zai hang dao bi mian fu gai huan re qi zu cheng de xi re ji tong ,xi shou hang dao nei re liang ,da dao jiang wen de mu de 。ben wen jie shao le leng bi jiang wen ji tong zai hang dao nei de bu zhi fang shi bing da jian le shi yan ping tai ,tong guo liu zu leng bi jiang wen shi yan de dao le chan pian huan re qi zhong liu su yu huan re qi jin chu kou wen cha de guan ji wei (35)T(28)0.88-0.81v(0.3m/s≤v≤0.8m/s),ji suan le huan re qi wai biao mian he hang dao nei kong qi de dui liu huan re ji shu wei 2.1W/(m2×K),chan pian huan re qi de ping jun xi re liang wei 71.8W,bing tong guo shu zhi mo ni yan zheng le shi yan de zhun que xing 。leng bi jiang wen ji tong de jiang wen xiao guo shou re li xue can shu de zhi yao ,ben wen fen xi le ji tong de re li xue can shu :liu su (0.01m/s≤v≤0.2m/s),guan jian ju (75mm≤D≤150mm),hang dao bi mian wen du (35℃≤Tw≤50℃)he jin kou shui wen (2℃≤Tin≤22℃)dui jiang wen xiao guo de ying xiang ,jie guo biao ming :liu su yu huan re qi jin chu kou wen cha he huan re qi wai biao mian ping jun wen du cheng fan bi ,yu xi re liang cheng zheng bi ;guan jian ju yu huan re qi jin chu kou wen cha yu xi re liang cheng fan bi ,yu huan re qi wai biao mian ping jun wen du cheng zheng bi ;jin kou shui wen yu huan re qi jin chu kou wen cha he xi re liang cheng fan bi ,yu huan re qi wai biao mian ping jun wen du cheng zheng bi ;liu su da ,guan jian ju xiao ,jin kou shui wen di dou hui zeng jia leng bi jiang wen ji tong de jiang wen xiao guo ,bing de chu le bu tong hang dao bi mian wen du xia liu su ,guan jian ju ,jin kou shui wen yu huan re qi wai biao mian ping jun wen du he xi re liang de guan ji yi ji ge can shu dui xi re liang de ying xiang cheng du ,zai ying yong shi ying gen ju xu yao shua ze ge kuo de re li xue can shu 。zai yan jiu leng bi jiang wen ji tong dui hang dao de jiang wen xiao guo shi ,jie shao le leng bi jiang wen ji shu de ying yong liu cheng ,bing yi yi tiao 500mhang dao wei li ,yan zheng leng bi jiang wen ji tong de jiang wen xiao guo 。tong guo ji suan de dao le mei you cai yong leng bi jiang wen ji shu shi de hang dao feng wen bian hua qu xian ,feng liu zai 500mchu da dao 30.17℃,zai ji suan hang dao liang ce cai yong leng bi jiang wen hou de feng wen bian hua qu xian ,feng liu zai 500mchu xia jiang dao 27.54℃,da dao jiang wen yao qiu ;jin er fen bie ji suan chu hang dao zai bu tong fu gai mian ji bi xia de feng wen bian hua qu xian ji da dao 28℃de tong feng ju li 。jie guo biao ming :sui zhao hang dao leng bi mian fu gai mian ji de zeng jia ,feng liu zai tong yi wei zhi de wen du zhu jian jiang di ,jiang wen xiao guo yue xian zhe 。ju leng bi jiang wen ji tong zai feng wen yue di chu kai shi bu zhi jiang wen xiao guo yue xian zhe ,dang xian you huan re qi can shu mo fa man zu jiang wen xu qiu shi ,jiang di huan re qi jin kou shui wen he jian xiao guan jian ju ke yi you xiao de yan chang hang dao de tong feng ju li 。leng bi jiang wen ji tong zai ying yong zhong ,wei bao zheng guan lu ge chu ya cha wen ding ,pu guan fang shi jin liang shi jin shui guan yu chu shui guan liu xiang yi zhi 。chan pian huan re qi de liu dong zu li wei 353.3Pa,zai 500mhang dao zhong ,chan ce leng bi mian de liu dong zu li wei 2478.9Pa,xu shui liang wei 4.43L/s。
论文参考文献
论文详细介绍
论文作者分别是来自中国矿业大学的倪路,发表于刊物中国矿业大学2019-07-18论文,是一篇关于冷壁降温论文,热力学参数论文,降温效果论文,数值模拟论文,中国矿业大学2019-07-18论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自中国矿业大学2019-07-18论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:冷壁降温论文; 热力学参数论文; 降温效果论文; 数值模拟论文; 中国矿业大学2019-07-18论文;