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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

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

Выпуски:
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.2018026953
pages 773-797

NUMERICAL INVESTIGATION OF THE EFFECT OF THE TANK DIAMETER TO TANK LENGTH RATIO ON THE THERMAL PERFORMANCE OF A HORIZONTAL MANTLED HOT WATER TANK

Dogan Erdemir
Erciyes University, Faculty of Engineering, Department of Mechanical Engineering Melikgazi, 38039, Kayseri, Turkey

Краткое описание

This study deals with determination of the effect of the ratio of tank diameter D to tank length L on the thermal performance of horizontal mantled hot water tanks. The D/L ratio has a great impact on the thermal performance of hot water tanks because the storage volume and heat transfer surface area of a tank change with the D/L ratio. In this study, the effect of different D/L ratios on thermal performance for a horizontal mantled hot water tank was investigated numerically by considering a constant storage volume and heat transfer surface area separately. The D/L was taken equal to 0.35, 0.50, and 0.65. The FLUENT 17.1 code was used in numerical analyses. The numerical model was validated by experimental data. The results were evaluated in terms of energy and exergy efficiencies. The results showed that a shorter tank length caused higher inlet water jet effects. So, lower D/L ratios yield higher thermal performance for a horizontal mantled hot water tank. The highest exergy efficiencies were seen at D/L = 0.35 for a constant heat transfer surface area and a constant storage volume. Mantle flow and main flow rates had no significant effects on energy and exergy efficiencies. However, they significantly changed the stored water temperature. An increasing mantle inlet temperature decreased the exergy efficiency, an increasing main inlet temperature increased the exergy efficiency. However, since the main objective of a hot water tank is to supply high temperature hot water, the mantle inlet temperature should be higher. Energy efficiency was nearly 98% and almost same for all cases. Exergy efficiency changed from 10% to 60% among different cases.

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