DOI QR코드

DOI QR Code

감귤박 건조용 진공고주파 건조기개발에 관한 연구

A Study on a Drying Machine with Microwave at Vacuum Condition for Discarded Citrus Scrapes

  • 고광수 (제주대학교대학원 기계공학과) ;
  • 박윤철 (제주대학교 기계공학과) ;
  • 윤형기 (한국에너지기술연구원 해양융복합연구실)
  • Ko, Gwang-Soo (Department of Mechanical Engineering, Graduate School, Jeju National University) ;
  • Park, Youn Cheol (Department of Mechanical Engineering, Jeju National University) ;
  • Yoon, Hyung-Kee (Korea Institute of Energy Research & Marin Energy Convergence Research)
  • 투고 : 2013.04.17
  • 심사 : 2013.11.16
  • 발행 : 2014.01.10

초록

A drying machine for discarded Citrus scrap was developed in this study. The Citrus produced in Jeju Province was treated as wastes (a) after making a beverage, such as drinking juice, and (b) if the size of the product did not fit with its agricultural product criteria. Various types of drying machine were developed in this study, and different kinds of technologies were combined improve the performance. To enhance the performance, the system was maintained in a vacuum state, and a high frequency micro wave was activated to the waste Citrus scrap, to heat up the moisture inside the Citrus kernels. The frequency of the micro-wave was 2.6 GHz, which is the resonant frequency of the molecules. Experiments were conducted with a vacuum of 50, 100, 150, 300, 500, and 700 mbar. The waste Citrus scrap has two types of status : (a) original scrap, and (b) mixed with blender. As results, specimen (a) shows a 0.13 g/sec evaporation rate, while specimen (b) shows a 0.19 g/sec rate, at 50 mbar of environment vacuum condition. For the drying efficiency, specimens (a) and (b) show 0.15 g/W and 0.24 g/W, respectively.

키워드

참고문헌

  1. Nation Waste Management General Plan, 2007, Copyright Ministry of Environment.
  2. Waste Source and Biomass Energy Performance Plan, 2009, Copyright Ministry of Environment.
  3. Theory and Practice for the Drying machine, 2003, New technology.
  4. Katahira, M. and Bekki, E., 1997, Heated air drying of garlic bulb in air-bag type dryer(Part 1), Journal of the Society of Agricultural Machinery, Vol. 59, No. 4, pp. 71-77.
  5. Katahira, M. and Bekki, E., 1997, Heated air drying of garlic bulb in air-bag type dryer(Part 2), Journal of the Society of Agricultural Machinery, Vol. 60, No. 1, pp. 99-106.
  6. Inoue, K., Murakami, N., Ootsuka, K., Sugi-moto, M., Li, W., and Miyaura, S., 2000, Simualtion model for drying soybeans using fundamental values of drying properties, Journal of the Society of Agricultural Machinery, Vol. 62, No. 6, pp. 98-107.
  7. Kawasaki, K., Imura, H., Aiura, M., and Itoh, S., 1996, Experiment and numerical simulation on drying of horizontally pilled rush, Journal of the Society of Agricultural Machinery, Vol. 58, No. 6, pp. 39-47.
  8. Lee, D. S. and Park, M. H., 1989, Quality optimization in red pepper drying, Korea J. Food Sci. Technol., Vol. 21, No. 5, p. 655.
  9. Lee, D. S., Keum, D. H., Park, N. H., and Park, M. H., 1989, Optimum drying conditions of on-farm red pepper dryer, Korean J. Food Sci. Technol., Vol. 21, No. 5, pp. 676-685.

피인용 문헌

  1. Recent Progress in Air-Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2014 vol.27, pp.7, 2015, https://doi.org/10.6110/KJACR.2015.27.7.380