• Title/Summary/Keyword: Air-conditioning system

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Evaluation of Thermal Environment on Air-barrier Type Perimeter-less System with Underfloor Air Conditioning System (바닥급기 공조시 에어베리어형 페리미터레스 공조시스템의 실내 열환경 평가)

  • 김용경;이정재
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.5
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    • pp.346-351
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    • 2003
  • This paper aims at suggesting design guidelines for a perimeter-less HVAC system that contributes energy savings. Perimeter-less HVAC system is one that relieves difficulties fuck as handling mixing loss, uneven radiative environment, and maintenance and repair. It prevents heat load gained through window and outdoor wall without modifying a previously equipped building skin system. In this paper, we performed several kinds of CFD (computational fluid dynamics) cases through numerical simulation to obtain an optimized perimeter-less design, and then we conducted a large-scale model experiment to see how the push-pull air flow would handle indoor heat to obtain an optimized perimeter-less design.

The Design of Efficient Fuzzy Logic Control System for Air-Conditioner (에어콘의 효과적인 퍼지 제어 시스템의 설계)

  • Kim, Il;Lee, Sang-Bae;Lee, Cheol-Yeong
    • Journal of the Korean Institute of Navigation
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    • v.18 no.4
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    • pp.147-154
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    • 1994
  • A practical application of a fuzzy control system is described for an air-conditioning system. Air-hadling units are being widely used for improving the performance of central air-conditioning systems. The fuzzy control system has two controlled variables, temperature and humidity, and three control elements, cooling, heating, and humidification. In order to achieve high efficiency and economical control, especially in large offices and industrial buildings, two controllable parameters, temperature and humidity, must be adequately controlled by the three final controlling elements. In this paper a fuzzy control system was described for controlling air-conditioning systems efficiently and economically.

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