ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Abstract
This study aims at experimentally investigating the effect of Al2O3 /water nanofluids on the heat transfer enhancement inside the double tube heat exchanger at variable inlet temperature. Al2O3 nanoparticle with concentration of 0.25% and 0.5% by volume concentration has been used at different inlet temperature. The experimental setup consisted of double tube heat exchanger with nanofluids on the cold side was used in turbulent regime with Reynolds number ranging from 20000 to 60000. Results from the study shows that the heat transfer increases with the increase in temperature and volume concentration of nano-particles. Significant improvement over the water is seen with maximum Nusselt number increase up to 24.5% at 50℃ inlet temperature.
5. Summary
In this paper, nanofluid is used to achieve the heat transfer enhancement in the double tube heat exchanger. The experiment was run using distilled water to establish the accuracy of the experiment. Results from the water as a coolant has been validated by established Dittus and Boelter equation. Once it has been checked that the data accuracy is within the limited error range nanofluid is added as a coolant on the coldside. The concentration of nanofluids was varied at 0.25% and 0.5% by volume fraction at variable inlet temperature. Results from the experiment show significant improvement over the water where maximum Nusselt number rising up to 24.5%. Furthermore it was seen that by increasing inlet temperature heat transfer of nanofluids increases which shows nanofluids dependency on temperature.