In our country, the number of coffee shops has steadily increased, reaching approximately 15,000 in 2013 from 1,254 in 2006. Adding to increase of coffee shops, customers' preference of roasted beans and extraction to ready-made coffee or instant coffee has lead to rapid expansion of roasted coffee market. In this study, the semi-rotating fluidized bed roaster prototype to reduce LPG consumption of the existing 60kg class large rotating fluidized bed roaster has been designed and retrofitted. In addition to the roaster prototype, processing system consist of bean automatic feeding equipment, debris sorting device, cooling device, cyclone collector, main control system etc. was developed. Also, the authors carrying out many measurements and tests such as LPG consumption, bean transfer time, debris sorting rate, cooling time and temperature, chaff collection rate for the various cases. As a result, the authors found that the semi-rotating fluidized bed roaster prototype can not only reduce LPG consumption, green bean transfer time, cooling time and temperature but also improve debris sorting rate, chaff collection rate of during coffee roasting

Abstract
 1. 서론
 2. 개발내용 및 방법
  2.1 반열풍식 로스터기
  2.2 원료 이송장치
  2.3 이물질 석발장치
  2.4 냉각장치
  2.5 싸이클론 집진장치
  2.6 메인 컨트롤장치
 3. 결과 및 고찰
 4. 결론
 References

• 김봉석(강릉원주대학교 기계자동차공학부) | B. S. Kim