Experimental free convection thin layer groundnut greenhouse drying

Authors

  • Mahesh Kumar Assistant Professor, Department of Mechanical Engineering Guru Jambheshwar University of Sciences & Technology, Hisar, India, 125001
  • Ravinder Kumar Sahdev Assistant Professor
  • Sumit Tiwari Assistant Professor, Department of Mechanical Engineering, GL Bajaj Institute of Technology and Management, Greater Noida, U.P. India
  • Hitesh Panchal Assistant Professor, Department of Mechanical Engineering, Government Engineering College, Patan, Gujarat, India, 384002
  • Himanshu Manchanda Assistant Professor, Department of Mechanical Engineering Guru Jambheshwar University of Sciences & Technology, Hisar, India, 125001

Keywords:

groundnut/peanut, greenhouse drying, convective heat transfer coefficient, evaporative heat transfer coefficient, free convection.

Abstract

The groundnuts were dried inside an even span roof type free convection greenhouse dryer with a useful floor area of 1.2×0.8 m2 in the environmental conditions of Rohtak, India (28o54’ N 76o34’E). Wire mesh sieves of sizes 0.15×0.25 m2, 0.25×0.4 m2,and 0.35×0.6 m2 were used to accommodate thin layer samples of groundnuts. The groundnuts were dried till the optimum safe moisture storage level (8–10%) was attained. Based on experimental (hourly) observations the values of constants (C and n) in the equation of Nusselt number were evaluated. The values of convective and evaporative heat transfer coefficients were calculated which were observed to decrease with the increase in the sieve size. The overall average greenhouse thermal, energy, and exergy efficiencies were evaluated as 8.83, 22.67, and 2.75% respectively. The overall average experimental error in terms of % uncertainty for groundnuts drying was evaluated as 37.94%.

Author Biographies

Mahesh Kumar, Assistant Professor, Department of Mechanical Engineering Guru Jambheshwar University of Sciences & Technology, Hisar, India, 125001

Assistant Professor,
Department of Mechanical Engineering
Guru Jambheshwar University of Sciences & Technology, 
Hisar, India, 125001

Ravinder Kumar Sahdev, Assistant Professor

Assistant Professor,

Department of Mechanical Engineering

University Institute of Engineering and Technology,

Maharshi Dayanand University, Rohtak, India, 124001

Sumit Tiwari, Assistant Professor, Department of Mechanical Engineering, GL Bajaj Institute of Technology and Management, Greater Noida, U.P. India

Department of Mechanical Engineering,

GL Bajaj Institute of Technology and Management,

Greater Noida,

U.P.

India

Hitesh Panchal, Assistant Professor, Department of Mechanical Engineering, Government Engineering College, Patan, Gujarat, India, 384002

Assistant Professor,

Department of Mechanical Engineering,

Government Engineering College, Patan, Gujarat, India, 384002

Himanshu Manchanda, Assistant Professor, Department of Mechanical Engineering Guru Jambheshwar University of Sciences & Technology, Hisar, India, 125001

Assistant Professor,
Department of Mechanical Engineering
Guru Jambheshwar University of Sciences & Technology,
Hisar, India, 125001

Downloads

Published

2019-10-10

Issue

Vol. 21 No. 3 (2019): CIGR Journal

Section

VI-Postharvest Technology and Process Engineering