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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 1.199 5-летний Импакт фактор: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 51, 2020 Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2016011522
pages 419-434

UPGRADING THE THERMAL PERFORMANCE OF PARALLEL AND CROSS-FLOW CONCENTRIC TUBE HEAT EXCHANGERS USING MgO NANOFLUID

Adnan Sözen
Gazi University, Faculty of Technology, Department of Energy System Engineering, Ankara, Turkey
Halil Ibrahim Variyenli
Gazi University, Technology Faculty, Energy Systems Engineering, 06500, Ankara, Turkey
M. Bahadir Özdemir
Gazi University, Department of Energy Systems Engineering, Technology Faculty, Teknikokullar, 06503 Ankara , Turkey
Metin Gürü
Gazi University, Engineering Faculty, Chemical Engineering, 06500, Ankara, Turkey

Краткое описание

The aim of this study is to investigate the effects of MgO nanofluid on the thermal performance of parallel and cross-flow concentric tube heat exchangers. A parallel (PFCTHE) or a cross-flow (CFCTHE) concentric tube heat exchanger was selected in these experiments, and its thermal performance was improved with the fluid. The MgO nanofluid/water and water/water hot/cold running fluids were used for monitoring the differences in the performance of the heat exchangers. The Triton X-110 surface active agent was added to the fluid to prepare 2% (wt.) concentration of the MgO nanofluid. The heat exchanger is of double-pipe type with the hot water flowing through the central tube while the cooling water flows through the annular space. A double-pipe heat exchanger with concurrent or countercurrent flow was utilized along with all auxillary equipment and instrumentation for the determination of the surface and overall heat transfer coefficients during turbulent flow. When the MgO nanofluid was used as the running fluid, an improvement of 33.4% and 20.4% was recorded for the efficiency of the PFCTHE and CFCTHE, respectively.

Ключевые слова: MgO nanofluid, heat exchanger, tube

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