Journal of Biosystems Engineering

  • 제39권2호
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  • Pages.101-110
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  • 2014
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  • 1738-1266(pISSN)
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  • 2234-1862(eISSN)
한국농업기계학회 (Korean Society for Agricultural Machinery)
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Effects of Drying Methods Based on Exhaust Cycle and Time on the Quality and Drying of Red Peppers

  • Nam, Sang Heon (Department of Bio-Industrial Machinery Engineering, Kyungpook National University) ;
  • Ha, Yu Shin (Department of Bio-Industrial Machinery Engineering, Kyungpook National University) ;
  • Kim, Tae Wook (Department of Precision Mechanical Engineering, Kyungpook National University)
  • 투고 : 2014.03.25
  • 심사 : 2014.05.16
  • 발행 : 2014.06.01
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초록

Purpose: The purpose of this study is to develop a system to optimize drying potential energy of the exhausted hot air by changing relative humidity of the air. This study modified the conventional drying method into a drying method changing exhaust cycle and time in order to control the relative humidity of the exhausted hot air during drying process. Method: A valve on the vent was controlled according to a preset time to change the exhaust cycle and time. This study analyzed the influence of the two different types of drying method on the drying characteristics, required energy, and quality of the dried peppers: conventional drying method exhausting hot air continuously and new drying method controlling exhaust cycle and time. Results: Drying characteristics based on exhaust time showed that drying time increased with exhaust time, and specific energy consumption was reduced by 28% from 18.39 MJ/kg (conventional method) to 13.24 MJ/kg when exhaust time was set to one minute. Drying characteristics based on heating time showed that drying time increased with heating time and specific energy consumption was reduced by 30% from 18.39 MJ/kg (conventional method) to 12.87 MJ/kg when exhaust time was set to 22 minutes. Drying characteristics based on exhaust cycle showed that drying time increased with exhaust cycle, and specific energy consumption was reduced by 31% from 18.39 MJ/kg (conventional method) to 12.69 MJ/kg when exhaust time was set to one minute and exhaust cycle was set to 22 minutes before drying and 40 minutes after drying. The quality of the dried red peppers showed that capsaicin, color, and sugar content were high as 34.87 mg/100g, 66.33, and 11.87%, respectively, when exhaust time was set to one minute and exhaust cycle was set to 22 minutes before drying and 40 minutes after drying. Conclusions: In order to utilize the drying potential energy of the exhausted air during drying process, the conventional drying method was modified into the drying method controlling exhaust cycle and time. The results showed that drying with exhaust cycle of one minute was more efficient in terms of drying time, required energy, and quality of the dried peppers than the one with exhaust cycle of 20~40 minutes.

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참고문헌

  1. Cho, Y. J. 1986. Drying Characteristics and Drying Model of Red Pepper. MS Thesis. Korea, Seoul: Seoul Nat'l University, Department of Agricultural Engineering.
  2. Chung, K. M. and J. M. Hwang. Quality of single harvested red peppers by drying methods. 2003. Korean J. Food Sci. Technol. 35(2): 329-333.
  3. Hoffman, P.G., Lego, M.C. and Galetto, W.G. 1983. Separation and quantitation of red pepper major heat principles by reverse-phase high-pressure liquid chromatography. J. Agric. Food Chem. 31:1326-1330. https://doi.org/10.1021/jf00120a044
  4. Hong, S. H. 1999. The future of red pepper powder industry in Korea. ASTA analytical methods 20.1 Food Ind. Nutr. 4:45-49.
  5. Kim, J. Y., D. H. Keum, J. H. Park, W. W. Kang, Ch. S. Han and Y. K. Lee. 1996. Evaluation of quality of red pepper with variations in drying methods. Korean J. Post-Harvest Sci. Technol. Agri. Products, 3(2): 137-143.
  6. Kim, K. H. and J. K. Chun. 1975. The effects of the hot air drying of red pepper on the quality. Korean J. Food Sci. Technol. 17(2):69-73.
  7. Kim, M. H. 1997. Color development of whole red peppers during drying, Food Engineering 1(3):174-178.
  8. Koh, H. K., Y. J. Cho and W. S. Lee. 1987. Effects of Variations of Drying Conditions on the Rate of Drying and Quality during Red Pepper Drying. Agric. Res. Seoul Nat'l Univ., 12(1):79-88.
  9. Koh, H. K., Y. J. Cho and S. W. Kang. 1990. Application of an Infrared Drying Process for Red Pepper. 15(3):230-243.
  10. Koh, H. K. 1998. Development of Drying System for Red Pepper. Annual Report of Research in Agriculture and Life Sciences. 2:70-73.
  11. Ku, K. H., N. Y. Kim, J. B. Park and W. S. Park. 2001. Characteristics of color and pungency in the red pepper for kimchi. Korean J. Food Sci. Technol. 33:231-237.
  12. Lee, W. S., H. K. Koh, S. H. Noh and Y. J. Cho. 1988. A Single Layer Drying Equation for Red Pepper. J. Agric. Sci. 13(2):59-71.
  13. Moon, S. B., D. Y. Choi, J. H. Lee, K. K. Kim and S. Y. Choi. 1999. A Study on the thermal characteristics of cayenne by low temperature vacuum dryer. SAREK 1999(1): 410-414.
  14. Page. C. 1949. Factors influencing the maximum rates of air drying shelled corn in thin layers. MS. Thesis. Purdue University.
  15. Park, Ch. R. 1975. A study on the influence of drying methods upon the chemical changes in red pepper. K. J. N., 8(4): 167-172.
  16. Park, J. G. 2008. Bio-production Machinery Engineering. CIR, Seoul, Republic of Korea.
  17. Paek, Y., Y. J. Kim, G. C. Kang, Y. S. Ryou. 2002. Heat Recovery System from Chamber of Agricultural Products Dryer. KSAM Conference Proceeding. 7(2).
  18. SAS. 2010. SAS 9.1 User's Guide. SAS Institute Inc., North Carolina, USA.
  19. SPSS. 2012. SPSS Statistics 19. User's Guide. Chicago, IL: SPSS, Inc.
  20. Yoon, W. M., J. Y. Lee. 2004. Effect of Dying Method on the Quality of Red Pepper(Capsicum annuum var. longum). J. Natural Sciences Pai Chai Univ. 14(1): 139-149.
  21. Yoon, Y. C. and W. M. Suh. 1999. Pepper drying by the heat discharged from heat pump system in greenhouse. KSBEC. Conference 8(2): 204-208.