A study on thermal fluid analysis in X-ray tube for non-fire alarm

비화재보를 위한 X-ray tube 내 열 유동해석에 관한 연구

  • Yun, Dong-Min (Department of Fire Protection Engineering, Sangji University) ;
  • Jeon, Yong-Han (Department of Fire Protection Engineering, Sangji University)
  • 윤동민 (상지대학교 소방공학과) ;
  • 전용한 (상지대학교 소방공학과)
  • Received : 2022.06.07
  • Accepted : 2022.06.30
  • Published : 2022.06.30

Abstract

Currently, Korea is an aging society, and it is expected to enter a super-aging society in about 4 years. Accordingly, many X-ray technologies are being developed. In X-rays, 99% of X-rays are converted into heat energy and 1% into light energy (X-rays). 99% of the thermal energy raises the temperature of the anode and its surroundings, and the cooling system is an important factor as overheating can affect the deterioration of X-ray quality and shortened lifespan. There is a method of forced air cooling using natural convection. Therefore, in this study, when X-rays were taken 5 times, Flow analysis was performed on heat removal according to temperature rise and cooling time for the heat generated at the anode of the X-ray tube (input power 60kW, 75kW, 90kW). Based on one-shot, the most rapid temperature rise section increased by more than 57% to 0.03 seconds, A constant temperature rises from 0.03 seconds to 0.1 seconds, It is judged that the temperature rises by about 8.2% or more at one time. After one-shot cooling, the cooling drops sharply from about 60% to 0.03 seconds, It is judged that the temperature has cooled by more than 86% compared to the temperature before shooting. One-shot is cooled by more than 86% with cooling time after 0.1 seconds, As the input power of the anode increases, the cooling temperature gradually increases. Since the tungsten of the anode target inside the X-ray tube may be damaged by thermal shock caused by a rapid temperature rise, an improvement method for removing thermal energy is required when using a high-input power supply.

Keywords

Acknowledgement

이 논문은 2020년도 상지대학교 교내 연구비 지원에 의한 것임.

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