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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.2018020132
pages 509-528

NUMERICAL STUDY OF A SOLAR GREENHOUSE DRYER WITH A PHASE-CHANGE MATERIAL AS AN ENERGY STORAGE MEDIUM

Orawan Aumporn
Laboratoire de Mathématiques et PhySique (LAMPS), Université de Perpignan Via Domitia 52, Avenue Paul Alduy, F-66860 Perpignan cedex, France
Belkacem Zeghmati
Laboratoire de Mathématiques et PhySique (LAMPS), Université de Perpignan Via Domitia 52, Avenue Paul Alduy, F-66860 Perpignan cedex, France
Xavier Chesneau
Laboratoire de Mathématiques et PhySique (LAMPS), Université de Perpignan Via Domitia 52, Avenue Paul Alduy, F-66860 Perpignan cedex, France
Serm Janjai
Solar Energy Research Laboratory (SERL), Department of Physics, Faculty of Science, Silpakorn University, Nakhon Pathom 73000, Thailand

Краткое описание

A numerical study of the thermal behavior of a solar greenhouse dryer with a thermal energy storage unit is presented. The solar greenhouse dryer consists of a gothic metallic arch structure covered with a polycarbonate film on a metallic plate floor. The products to be dried (100 kg of banana Musa ABB CV. Kluai "Namwa") are located as a thin layer on four metallic grids. The thermal energy storage unit, disposed under the greenhouse floor, is composed of a layer of phase-change materials (PCM) placed between the metal plate and a concrete slab. Paraffin wax was used as PCM in thermal energy storage with a melting temperature of 28°C. Transfer equations are derived by considering energy balance for different components of the greenhouse dryer. The enthalpy method and heat conduction equation have been used for calculating the PCM layer and concrete slab, respectively. Equations are solved numerically by an implicit finite difference scheme and homemade software. Parametric studies of the greenhouse dryer coupled to the thermal energy storage unit illustrate the effects of drying air volume flow rate on the greenhouse temperature, drying duration, as well as the efficiency of the solar dryer and energy storage unit. Our results allowed us to conclude that under the climatic conditions of Nakorn Pathom (Thailand) the thermal storage unit improves the greenhouse solar dryer efficiency. For instance, for the drying air volume flow rate ranging from 0.05 to 0.2 m3·s-1, this efficiency varies between 12% and 38% with a thermal storage unit and between 8% and 28% without a storage unit.


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