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首页> 外文期刊>Journal of Mechanical Science and Technology >Experimental investigation on the heat transfer performance of evacuated tube solar collector using CuO nanofluid and water
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Experimental investigation on the heat transfer performance of evacuated tube solar collector using CuO nanofluid and water

机译：用CuO纳米流体和水分疏散管太阳能收集器传热性能的实验研究

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摘要

The efficiency of an evacuated tube solar collector was experimentally measured and analyzed according to the size of CuO nanoparticle and the concentration of the CuO nanofluid. In addition, the efficiency of the evacuated tube solar collector using CuO nanofluid as a working fluid was compared with that when water was used. As a result, the efficiency of the evacuated tube solar collector improved as the concentration of the CuO nanofluid increased at low concentration. Further, the efficiency of the evacuated tube solar collector was higher at a mass flux rate of 598 kg/sm(2) than at 420 kg/sm(2). The highest efficiency of the solar collector with 40 nm-CuO nanofluid was 69.1 %, an improvement of 2.0 % compared to 80 nm-CuO nanofluid. The most optimal concentration of the 40 nm-CuO nanofluid was 0.5 vol% and an improvement of thermal efficiency was 7.2 % compared to water. In addition, at this concentration, the efficiency improved by 4.4 %, 2.3 % and 0.3 % compared to that at concentrations of 0.1 vol%, 0.3 vol% and 0.7 vol%, respectively. The use of CuO nanofluid in the evacuated tube solar collector can improve the efficiency and can maintain the high efficiency for wide operating conditions compared to water.
机译：根据CuO纳米颗粒的尺寸和CuO纳米流体的浓度，通过实验测量和分析抽空管太阳能收集器的效率。另外，将抽空管太阳能收集器用CuO纳米流体作为工作流体的效率与水进行比较。结果，随着CuO纳米流体浓度以低浓度增加，抽空管太阳能收集器的效率得到改善。此外，抽空管太阳能收集器的效率高于598kg / sm（2）的质量通量速率高于420kg / sm（2）。太阳能收集器的最高效率为40nm-cuO纳米流体为69.1％，与80nm-cuo纳米流体相比，提高2.0％。 40nm-CuO纳米流体的最佳浓度为0.5体积％，与水相比，热效率的提高为7.2％。另外，在这种浓度下，与0.1体积％，0.3体积％和0.7体积％的浓度分别增加了4.4％，2.3％和0.3％。 CuO纳米流体在抽空管太阳能收集器中的使用可以提高效率，与水相比，可以保持宽操作条件的高效率。

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