Effect of nanofluid properties and mass-flow rate on heat transfer of parabolic-trough concentrating solar system

IF 1.2 Q3 ENGINEERING, MARINE
M. K. Islam, M. Hasanuzzaman, N. Rahim, A. Nahar
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引用次数: 1

Abstract

Sustainable power generation, energy security, and global warming are the big challenges to the world today. These issues may be addressed through the increased usage of renewable energy resources and concentrated solar energy can play a vital role in this regard. The performance of a parabolic-trough collector’s receiver is here investigated analytically and experimentally using water based and therminol-VP1based CuO, ZnO, Al2O3, TiO2, Cu, Al, and SiC nanofluids. The receiver size has been optimized by a simulation program written in MATLAB. Thus, numerical results have been validated by experimental outcomes under same conditions using the same nanofluids. Increased volumetric concentrations of nanoparticle is found to enhance heat transfer, with heat transfer coefficient the maximum in W-Cu and VP1-SiC, the minimum in W-TiO2 and VP1-ZnO at 0.8 kg/s flow rate. Changing the mass flow rate also affects heat transfer coefficient. It has been observed that heat transfer coefficient reaches its maximum of 23.30% with SiC-water and 23.51% with VP1-SiC when mass-flow rate is increased in laminar flow. Heat transfer enhancement drops during transitions of flow from laminar to turbulent. The maximum heat transfer enhancements of 9.49% and 10.14% were achieved with Cu-water and VP1-SiC nanofluids during turbulent flow. The heat transfer enhancements of nanofluids seem to remain constant when compared with base fluids during either laminar flow or turbulent flow.
纳米流体性质和质量流率对抛物槽聚光太阳能系统传热的影响
可持续发电、能源安全和全球变暖是当今世界面临的重大挑战。这些问题可以通过增加可再生能源的使用来解决,集中太阳能可以在这方面发挥重要作用。本文使用水基和铝热剂-VP1基CuO、ZnO、Al2O3、TiO2、Cu、Al和SiC纳米流体,对抛物面槽收集器接收器的性能进行了分析和实验研究。用MATLAB编写的仿真程序对接收机的尺寸进行了优化。因此,在相同条件下使用相同纳米流体的实验结果验证了数值结果。发现纳米颗粒体积浓度的增加增强了传热,在0.8kg/s流速下,W-Cu和VP1-SiC的传热系数最大,W-TiO2和VP1-ZnO的传热系数最小。改变质量流量也会影响传热系数。当层流中的质量流量增加时,SiC水和VP1 SiC的传热系数分别达到23.30%和23.51%。在从层流到湍流的过渡过程中,传热增强作用下降。在湍流过程中,Cu-水和VP1-SiC纳米流体实现了9.49%和10.14%的最大传热增强。在层流或湍流过程中,与基础流体相比,纳米流体的传热增强似乎保持不变。
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来源期刊
CiteScore
2.50
自引率
5.60%
发文量
0
审稿时长
20 weeks
期刊介绍: TJPRC: Journal of Naval Architecture and Marine Engineering (JNAME) is a peer reviewed journal and it provides a forum for engineers and scientists from a wide range of disciplines to present and discuss various phenomena in the utilization and preservation of ocean environment. Without being limited by the traditional categorization, it is encouraged to present advanced technology development and scientific research, as long as they are aimed for more and better human engagement with ocean environment. Topics include, but not limited to: marine hydrodynamics; structural mechanics; marine propulsion system; design methodology & practice; production technology; system dynamics & control; marine equipment technology; materials science; under-water acoustics; satellite observations; and information technology related to ship and marine systems; ocean energy systems; marine environmental engineering; maritime safety engineering; polar & arctic engineering; coastal & port engineering; aqua-cultural engineering; sub-sea engineering; and specialized water-craft engineering. International Journal of Naval Architecture and Ocean Engineering is published quarterly by the Society of Naval Architects of Korea. In addition to original, full-length, refereed papers, review articles by leading authorities and articulated technical discussions of highly technical interest are also published.
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