Experimental performance of direct absorption collector using heat-transfer oil added with different nanoparticles

doi:10.3969/j.issn.0438-1157.2014.z2.043

CIESC Journal ›› 2014, Vol. 65 ›› Issue (z2): 293-298.DOI: 10.3969/j.issn.0438-1157.2014.z2.043

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Experimental performance of direct absorption collector using heat-transfer oil added with different nanoparticles

XU Guoying¹, LI Lingzhi¹, ZHANG Xiaosong¹, SUN Yueming²

1. School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China;
2. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, Jiangsu, China

Received:2014-08-22 Revised:2014-09-01 Online:2014-12-30 Published:2014-12-30
Supported by:
supported by the National Natural Science Foundation of China (51206027) and the Natural Science Foundation of Jiangsu Province (BK2012339).

添加不同纳米颗粒的导热油直接吸收集热实验性能

徐国英¹, 李凌志¹, 张小松¹, 孙岳明²

1. 东南大学能源与环境学院, 江苏南京 210096;
2. 东南大学化学与化工学院, 江苏南京 210096

通讯作者: 徐国英
基金资助:
国家自然科学基金项目(51206027);江苏省自然科学基金青年基金(BK2012339)。

Abstract

Abstract:

A kind of direct solar heat collection system, in which heat-transfer oil added with nanoparticles as the absorbing medium in vacuum tube without coating was proposed. Different kind of oil based nanofluids respectively added with CuO、Fe₃O₄ and graphite nanoparticles for solar heat collection were experimentally investigated. Results show that a greatly enhancement achieved in the solar radiation absorption capacity when add nanoparticles into the heat-transfer oil. Within 80℃, direct absorption collecting efficiency using nanofluids is higher than that of using traditional film coating vacuum tube solar collector, while the heat loss increased rapidly on a higher temperature condition. Furthermore, efficiencies of oil-based CuO nanofluids with different mass fractions were also comparatively analyzed, and the optimum added mass fraction was obtained.

Key words: solar collection, nanofluids, heat-transfer oil, collection efficiency

摘要：

提出并探讨了采用导热油基液纳米流体为集热介质的太阳能直接吸收式集热方法。分别对添加纳米CuO、Fe₃O₄、石墨颗粒的导热油基液纳米流体进行了闷晒实验研究。结果显示:添加上述纳米颗粒均可显著提高导热油对太阳辐射的吸收;80℃以内工况下,纳米流体的直接吸收集热效率要高于传统镀膜真空管内导热油间接吸收的集热效率;但在更高温度工况下的对外散热损失增大,效率迅速下降。同时,实验对比分析了纳米颗粒的添加质量分数对导热油-CuO纳米流体集热效率、散热损失系数等性能参数的影响规律,得出了最佳纳米颗粒添加比例范围。

关键词: 太阳能集热, 纳米流体, 导热油, 集热效率

CLC Number:

TK512

XU Guoying, LI Lingzhi, ZHANG Xiaosong, SUN Yueming. Experimental performance of direct absorption collector using heat-transfer oil added with different nanoparticles[J]. CIESC Journal, 2014, 65(z2): 293-298.

徐国英, 李凌志, 张小松, 孙岳明. 添加不同纳米颗粒的导热油直接吸收集热实验性能[J]. 化工学报, 2014, 65(z2): 293-298.

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Experimental performance of direct absorption collector using heat-transfer oil added with different nanoparticles

添加不同纳米颗粒的导热油直接吸收集热实验性能

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