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한도영(Doyoung Han),유병강(Byeongkang Yoo) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.6
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.
한도영(Doyoung Han),유병강(Byeongkang Yoo) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Condensing gas boiler units may make a big role for the reduction of energy consumption in heating industries. In order to decrease the energy consumption of a boiler unit, the effective operation is necessary. In this study, the supply water temperature algorithm of a condensing gas boiler was developed. This includes the setpoint algorithm and the control algorithm of the supply water temperature. The setpoint algorithm was developed by the fuzzy logic and the control algorithm was developed by the proportional integral algorithm. In order to analyse the performance of the supply water temperature algorithm, the dynamic model of a condensing gas boiler system was used. Simulation results showed that the supply water temperature algorithm developed for this study may be practically applied for the control of the condensing gas boiler.
한도영(Doyoung Han),유병강(Byeongkang Yoo) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Condensing gas boiler units may make a big role for the reduction of energy consumption in heating industries. In order to decrease the energy consumption of a boiler unit, the effective operation is necessary. In this study, the system algorithm of a constant flow condensing gas boiler system was developed. This includes a supply water temperature algorithm, a pump pressure algorithm. The supply water temperature setpoint algorithm was developed from a heat balance equation, and the supply water temperature control algorithm was developed by using a proportional integral logic. The pump pressure setpoint algorithm was developed by a pump-system P-Q curve, and the pump control algorithm was developed by using a fuzzy logic. In order to analyse the performance of the system algorithm, the dynamic model of a condensing gas boiler system was used. Simulation results showed that the system algorithm developed for this study may be practically applied for the control of a constant flow condensing gas boiler.