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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.2018018321
pages 309-325

FORCED CONVECTION GREENHOUSE GROUNDNUT DRYING: AN EXPERIMENTAL STUDY

Ravinder Kumar Sahdev
Department of Mechanical Engineering, University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India
Mahesh Kumar
Department of Mechanical Engineering, Guru Jambheshwar University of Sciences and Technology, Hisar, 125001, India
Ashwani Kumar Dhingra
Department of Mechanical Engineering, University Institute of Engineering and Technology, Maharshi Dayanand University, Rohtak, 124001, India

Краткое описание

In this study, the convective and evaporative heat transfer coefficients of groundnut were evaluated in a forced convection greenhouse drying (FCGHD) mode. The groundnuts were dried in the roof-type even span greenhouse with a floor area of 1.20 × 0.8 m2 in a forced mode in the climatic conditions of Rohtak, India (28°54'0"N 76°34'0"E). Three different wire mesh trays of 0.15 × 0.25 m2 (Sample 1), 0.25 × 0.40 m2 (Sample 2), and 0.35 × 0.60 m2 (Sample 3) sizes were used to accommodate a thin layer of groundnuts. Groundnuts were dried in the FCGHD mode till an optimum safe moisture storage level of 8−10% was reached. The hourly experimental data were used to determine the values of experimental constants C and n in the Nusselt number expression by simple linear regression analysis and, consequently, the convective heat transfer coefficients (CHTC) were calculated. The value of CHTC was found to decrease with increase in the tray size. The average value of the greenhouse efficiency was found to be 38.56%, 26.95%, and 31.99% for drying groundnut Samples 1, 2, and 3, respectively. The energy and exergy efficiencies were also evaluated and their values were observed to be 54.45%, 77.92%, and 65% and 2.57%, 1.01%, and 0.95% for drying groundnut Samples 1, 2, and 3 in the FCGHD mode, respectively. The experimental errors in terms of percent uncertainty were also evaluated. They were found to vary from 19.62% to 64.10%. The error bars for CHTC and evaporative heat transfer coefficient (EHTC) are also shown for groundnut drying under FCGHD conditions.


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