Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Change of Surface Temperature and Far-infrared Emissivity in Ceramics Manufactured from a Board Mixed with Sawdust and Mandarin Peel

톱밥·귤박 혼합보드로 제조한 세라믹의 표면온도 변화 및 원적외선방사 특성

  • Hwang, Jung-Woo (Department of Wood Science & Technology, Chonbuk National University) ;
  • Oh, Seung-Won (Department of Wood Science & Technology, Chonbuk National University)
  • Received : 2018.10.10
  • Accepted : 2018.12.27
  • Published : 2019.01.25
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Abstract

The aim of the study is to use the by-products sawdust, formed during sawing and mandarin peel which are agricultural by products. The boards were manufactured by mixing the sawdust and mandarin peel at different mixing ratio and density. In terms of changes in surface temperature of ceramics, we could found that the velocity was fast in the early time of heat transfer until 10 minutes and after that the velocity increased but not very fast. At the elapsed time of 30 minutes, the surface temperature of ceramics increased with the carbonization temperature and rate of mandarin peel addition did not influence the surface temperature. Far - infrared emissivity had no constant tendency in rate of mandarin peel addition, it decreased with increase of carbonization temperature.

본 연구는 톱밥과 농업부산물인 귤박을 이용하여 보드를 제조하고 세라믹화 하여 표면온도 및 원적외선 방사특성을 조사하였다. 세라믹의 표면온도는 경과시간 10분까지는 급속히 상승하였고, 30분 후에는 탄화온도가 높을수록 높았고, 귤박 혼합율별로는 별 영향이 없었다. 원적외선 방사율은 귤박 혼합율에 따라 일정한 경향이 없었고, 탄화온도가 증가할수록 낮은 값을 보였다.

Keywords

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Fig. 1. Surface temperature for percentage of resin impregnation as a function of heating time.

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Fig. 3. Surface temperature for mandarin peels addition as a function of heating time.

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Fig. 2. Surface temperature for carboonization temperature as a function of heating time.

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Fig. 5. Relationship between cooling and descent temperature of surface of ceramics with carbonizing temperature.

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Fig. 7. Relationship between percentage of mandarin peels addition and IR emissivity.

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Fig. 9. Relationship between carbonization temperature and IR emissivity.

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Fig. 8. Relationship between percentage of mandarin peels addition and IR emission power.

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Fig. 10. Relationship between carbonization temperature and IR emission power.

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Fig. 4. Relationship between cooling and descent temperature of surface of ceramics with resin impregnation ratio.

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Fig. 6. Relationship between cooling and descent temperature of surface of ceramics with mandarin peels addition ratio.

Table 1. Characteristics of phenol-formaldehyde resin for the test

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