CAJ | 학술논문

研究了MWCNT-H2O纳米流体的光学及光热特性，利用紫外-可见-近红外分光光度计结合积分球原理测试了不同质量分数的纳米流体在太阳能全波段（250 nm<λ<2500 nm）的透射率。利用太阳辐射对纳米流体的光热转换特性进行了测试。实验结果表明：纳米流体的透射率明显低于水的，并且纳米流体的透射率随着粒子质量分数的增加而降低。纳米流体（质量分数为0.02%）的最高温度比水提高了31.87%，集热量比水增加了54.14%。MWCNT-H2O纳米流体有望用在直接吸收式太阳能集热系统中。
연구료MWCNT-H2O납미류체적광학급광열특성，이용자외-가견-근홍외분광광도계결합적분구원리측시료불동질량분수적납미류체재태양능전파단（250 nm<λ<2500 nm）적투사솔。이용태양복사대납미류체적광열전환특성진행료측시。실험결과표명：납미류체적투사솔명현저우수적，병차납미류체적투사솔수착입자질량분수적증가이강저。납미류체（질량분수위0.02%）적최고온도비수제고료31.87%，집열량비수증가료54.14%。MWCNT-H2O납미류체유망용재직접흡수식태양능집열계통중。
Optical and photothermal properties of MWCNT-H2O nanofluids were investigated in the present work. The transmittance of nanofluids over solar spectrum (250 to 2 500 nm) was measured by the UV-Vis-NIR spectrophotometer based on the integrating sphere principle. The photothermal properties of nanofluids were studied with exposure to the solar radiation. The experimental results show that the transmittance of MWCNT-H2O nanofluids is much less than that of deionized water, and decreases with increasing nanoparticle mass fraction. The highest temperature and heat gain of MWCNT-H2O nanofluids (the mass fraction is 0.02%) can increased up to 31.87%and 54.14%compared with deion-ized water, respectively. From the results it can be concluded that MWCNT-H2O nanofluids are suitable for direct ab-sorption solar thermal energy systems.