태양 굴뚝 발전의 흡수판 위에 위치한 사분원의 장애물에 의한 열유체적 특성 변화의 수치적 연구 및 열역학적 분석 = Numerical Study and Thermodynamic Analysis on the Effects of Quadrant Circular Obstacles Located on the Absorber of Solar Chimney Power Plant

다국어 초록 (Multilingual Abstract)

Solar chimney power generation using solar heat, which is an important energy source as a renewable energy, has been attempted in various studies because it is possible to generate electricity with simple equipment. In this study, using ANSYS Fluent, a commercial numerical analysis program, the changes in the thermal and fluid properties of air flow according to the presence and number of quadrant-shaped obstacles on the solar chimney absorber were quantified and visualized. Exergy, a thermodynamic useful energy, was calculated using quantitative data such as speed and temperature, and quantified using the concept of exergy efficiency presented in the existing literature. As a result, it was confirmed that the obstacle promotes the turbulence of the air flow and heat transfer, thereby increasing the exergy efficiency.

국문 초록 (Abstract)

재생에너지로서 중요한 에너지원인 태양열을 이용한 태양 굴뚝 발전은 간단한 장비로 전기를 생산할 수 있기 때문에 다양한 연구에서 시도되고 있다. 본 연구에서는 상용 수치해석 프로그램인 ANSYS Fluent를 이용하여 굴뚝 흡수체의 사분면형 장애물의 유무와 개수에 따른 기류의 열 및 유체 특성 변화를 정량화하여 가시화하였다. 열역학적 유용에너지인 exergy는 속도, 온도 등의 정량적 데이터를 이용하여 계산하였고, 기존 문헌에서 제시한 exergy 효율 개념을 이용하여 정량화하였다. 그 결과, 장애물은 공기 유동의 난류 및 열전달을 촉진하여 엑서지 효율을 증가시키는 것을 확인하였다.

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