• Journal of the Korea Convergence Society
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• v.12 no.11
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• pp.291-299
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• 2021

Recently, due to environmental problems caused by densification and high rise of urban areas, interests in air flow is increasing and appropriate shape and layout design of buildings is required. Therefore, in this study, we intend to propose an experimental method that can observe the air flow around a building using thermochromic pigment. Thermochromic pigments have limitations in observing precise temperature changes due to the characteristic that the color changes only with respect to a specific temperature, but they have the advantages of easy configuration of experimental equipment and short time required for experiments. In this study, the air flow tendencies around a building was examined by performing CFD analysis for a simple model and then compared with the thermochromic experiment results in order to review the usefulness of the proposed experimental method. As a result of the experiment, it was possible to observe the formation of separated flow and vortex region generated by buildings using the charateristics of thermochromic pigment and it was confirmed that the proposed method can be useful for buildings design and urban city planning.

• Proceedings of the Optical Society of Korea Conference
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• 2003.07a
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• pp.196-197
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• 2003

광섬유형 센서는 전자기적 간섭에 강하고 높은 감도와 원거리 측정 등의 장점뿐만 아니라 낮은 삽입 손실, 높은 기계적인 신뢰성, 원거리 측정과 같은 장점을 가지고 있어 광통신 기술뿐 아니라 기초과학및 응용 과학분야의 계측에 활발히 이용되고 있다. 온도센서의 경우 센서의 재료가 온도에 견디는 정도에 따라 측정범위가 좌우되므로 광섬유형 센서의 경우 넓은 온도범위에서 측정이 가능하며 다양한 구조의 센서구현이 용이하다. (중략)

• Resources Recycling
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• v.26 no.5
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• pp.61-66
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• 2017

Vanadium Dioxide has been investigated for use as a "spectrally-selective" window coating to block infrared transmission and reduce the loss of building interior heat through windows. The preparation of thermochromic $VO_2$ powder by the reductive reaction with hydrogen was studied. The reductive reaction method has many advantages of easy and mass production of $VO_2$ powder according to controlled reaction without semi-conductor equipments like sputter and beam evaporator. The reaction temperature, time, concentration of reductive gas, post-annealing condition and W addition as dopant would affect the characterization of $VO_2$ powder and its thermochromism. Many applications for electrical device and energy-saving technologies is expected.