Study of Performance of Coaxial Vacuum Tube Solar Collector on Ethanol Distillation Process

International Conference on Green and Renewable Energy Resources 2016

能源学;生态环境科学

Sutomo^1 ; Ramelan, A.H.^2 ; Mustafa^1 ; Tristono, T.^3

Mechanical Engineering Department, Universitas Merdeka Madiun, Madiun

63133, Indonesia^1

Faculty of Mathematics and Natural Science, Sebelas Maret University, Surakarta

57126, Indonesia^2

Informatics Management Department, Universitas Merdeka Madiun, Madiun

63133, Indonesia^3

关键词: Cavity pressure;    Closed spaces;    Distillation process;    Experimental research;    Negative correlation;    Pressure level;    Radiation intensity;    Vacuum tube collectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/75/1/012001/pdf
DOI  :  10.1088/1755-1315/75/1/012001

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Coaxial vacuum tube solar collectors can generate heat up to 80°C is possibly used for ethanol distillation process that required temperature 79°C only. This study reviews the performance of coaxial collector vacuum tube used for ethanol distillation process. This experimental research was conducted in a closed space using a halogen lamp as a solar radiation simulator. We had done on three different of the radiation values, i.e. 998 W/m2, 878 W/m2and 782 W/m2. The pressure levels of vacuum tube collector cavity in the research were 1; 0.5; 0.31; 0.179; and 0.043 atmospheres. The Research upgraded the 30% of ethanol to produce the concentration of 77% after distillation. The result shows that the performance of coaxial collector vacuum tube used for ethanol distillation process has the negative correlation to the level of the collector tube cavity pressure. The productivity will increase while the collector tube cavity pressure decreased. Therefore, the collector efficiency has the negative correlation also to the level of collector tube cavity pressure. The best performance achieved when it operated at a pressure of 0.043 atmosphere with radiation intensity 878 W / m2, and the value of efficiency is 57.8%.