声悬浮条件下相变蓄冷纳米流体过冷度实验研究

Experimental Study on Supercooling Degree of Nanofluids Used as Cool Storage under Acoustic Levitation

采用两步法制备了氧化石墨烯纳米流体,对容器内和声悬浮条件下氧化石墨烯纳米流体和去离子水的过冷度进行了对比研究,声悬浮条件下与去离子水相比,纳米流体的过冷度降低了30.7%,而且成核时间提前了74.6%。纳米流体在声悬浮下的过冷度比在容器内的过冷度低了6.87%,成核时间提前了95.5%。

The graphene oxide nanofluids(GO-H2O) was prepared using two-step method. A comparative study of the supercooling degree of nanofluids and deionized water under acoustic levitation and in container were conducted, and the result shows that, compared to the deionized water, the supercooling degree of nanofluids is reduced by 30.7% and the nucleation time is ahead of 74.6% under acoustic levitation. The supercooling degree of nanofluids under acoustic levitation is reduced by 6.87% and the nucleation time is ahead of 95.5% compared to that of in container.