Energy analysis in white rice and par-boiled rice mills for cogeneration in Thailand

Name: Wannee Ekasilp

Organization : King Mongkut's Institute of Technology Thonburi. School of Energy, Environment and Materials. Department of Energy Technology

Name: Somchart Soponronnarit

Organization : King Mongkut's Institute of Technology Thonburi. School of Energy, Environment and Technology. Department of Energy Technology

Name: Apichit Therdyothin

Organization : King Mongkut's Institute of Technology Thonburi. School of Energy, Environment and Materials. Department of Energy Management Technology

keyword: Rice milling

Abstract: This research is a part of a study entitled "Cogeneration Rotential of Rice Mills in Thailand". Three types of rice mills are studied: the white rice mills that use only electricity, the white rice mills that use electricity and steam engines, and the par-boiled rice mills that use electricity and steam in the par-boiled process. The white rice mills and par-boiled mills use steam in the heating process for paddy drying. Electrical energy consumption in the milling process of white rice mill and par-boiled rice mill are approximately 110 MJ/ton paddy and 134 MJ/ton paddy, respectively. Electrical energy consumption of white rice mill spent in whitening and polishing process is 43%, 26% in screening and blowing process, 23% in bucket and conveyor process, and 8% in husking process. Similarly, 43% of electrical energy consumption in the milling process of par-boiled rice mill is spent in whitening and polishing process, 30% in screening, bucket and conveyor process, 23% in blowing process, and 4% in husking process. The thermal energy consumption for par-boiled rice process is 2410 MJ/ton paddy, of which 8% is for soaking process, 6% for cooking process and 86% for paddy drying process. The results of the analysis show that the total electrical energy consumption--milling process, drying process, improving and packing process, office and boiler in the white rice mill--is approximately 190 MJ/ton paddy and for par-boiled rice mill it is 234 MJ/ton paddy. Assuming that steam turbine cogeneratin is used, the electrical power generated from 312 rice mills is therefore 217 MW, of which 123 MW is used within the rice mills and 94 MW is surplus. The thermal energy generated from the rice mills is 3016 x 1010 MJ/year, of which 17% is used within the rice mills and 83% is surplus. However, optimization of cogeneration system may help reduce the amount of surplus steam

King Mongkut's Institute of Technology Thonburi

Address: Bangkok

Email: info.lib@mail.kmutt.ac.th

King Mongkut's Institute of Technology Thonburi

Created: 1996

Issued: 2005-11-14

Modified: 2017-07-17

บทความ/Article

BibliograpyCitation : Compiled Research and Technical Papers, KMITT 1996 p. 38-45

CallNumber: 12000520

eng

©copyrights King Mongkut's University of Technology Thonburi

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