Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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The Supply Water Algorithm for a Condensing Gas Boiler Control

콘덴싱가스보일러 제어를 위한 공급수알고리즘

  • Han, Do-Young (School of Mechanical Engineering, Kookmin University) ;
  • Yoo, Byeong-Kang (Graduate School of Mechanical Engineering, Kookmin University)
  • 한도영 (국민대학교 기계시스템공학부) ;
  • 유병강 (국민대학교 기계공학과 대학원)
  • Received : 2011.05.24
  • Accepted : 2011.05.18
  • Published : 2011.06.10
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Abstract

The energy consumption of a condensing gas boiler may be greatly reduced by the effective operation of the unit. In this study, the supply water algorithm for a condensing gas boiler control was developed by using the fuzzy logic. This includes the supply water set temperature algorithm, and the control algorithms of a gas valve, a blower and a pump. For the set temperature algorithm, the outside air temperature and the return water temperature were used as input variables. The supply water temperature difference and its slope were used as input variables of the gas valve and blower control algorithm. And the supply water temperature and the return water temperature were used as input variables of the pump control algorithm. In order to analyse performances of these algorithms, the dynamic model of a condensing gas boiler was used. The initial start-up test, the supply water set temperature change test, the outside air temperature change test, and the return water temperature change test were performed. Simulation results showed that algorithms developed in this study may be practically applied for the effective control of a condensing gas boiler.

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References

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