Analysis of temperature and velocity distributions in a solar drying box coffee beans

2nd Nommensen International Conference on Technology and Engineering

Siagian, P.^1,2 ; Napitupulu, F.H.^2 ; Setyawan, E.Y.^3 ; Siagian, L.^4 ; Napitupulu, R.A.M.^2 ; Ambarita, H.^2

Department of Mechanical Engineering, Universitas HKBP Nommensen, Jl. Sutomo No 4A, Medan, Indonesia^1

Departement of Mechanical Engineering, Universitas Sumatera Utara, Jl. Almamater Kampus USU, Medan, Indonesia^2

Department of Mechanical Engineering, National Institute of Technology, Malang, Indonesia^3

Department of Electrical Engineering, Universitas HKBP Nommensen, Jl. Sutomo No 4A, Medan, Indonesia^4

关键词: Boundary values;    Coffee beans;    Commercial codes;    Electric fans;    Flat-plate collector;    Hot air;    Photovoltaic;    Solar drying;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/420/1/012035/pdf
DOI  :  10.1088/1757-899X/420/1/012035

来源: IOP

【 摘 要 】

In this study the fluid flow and velocity distribution in a solar drying box which is used to dry coffee beans are studied numerically. The solar box receives the hot air from flat-plate collector. The hot air is flowed by using an electric fan which is powered by a photovoltaic. The objective of this study is to explore the temperature and velocity distributions in the box. The dimension of the drying box is 100 cm 90 cm 50 cm. Several experimental are carried out. The experimental results are used as boundary value in the numerical simulation. The commercial code CFD is used to perform the analysis. The results show that the temperature of the hot air entering the solar drying box varies from 29.29°C (at 9.00 AM) to 59.98°C (at 14.00 PM). By using these data, the numerical simulations are carried out. The temperature and velocity distributions are plotted and discussed. It is recommended to use the results to design an optimum solar drying box.