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뉴럴네트워크를 사용한 보일러 시스템 공급수온도의 재설정
한도영(Doyoung Han),유병강(Byeongkang Yoo),이종찬(Jongchan Lee) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
Energy savings through the control of a boiler system makes a big role for the national energy conservation. A gas valve, a blower, and a pump of boiler system may be controlled by the system algorithm, which consists of a supply water temperature setpoint algorithm, a supply water temperature reset algorithm, a supply water temperature control algorithm, and a pump control algorithm. In this study, a supply water temperature reset algorithm was developed by a 2x4x1 neural network. For the neural network, the difference between an indoor set temperature and an actual temperature and the difference between a supply water temperature and an indoor air temperature were used as input variables. And a supply water temperature setpoint difference was used as an output. In order to verify the effectiveness of the system algorithm, various tests were performed. Test showed good result so that the system algorithm developed for this study may effectively used for the control of a boiler system.
한도영(Doyoung Han),한창현(Changhyun Han) 대한설비공학회 2013 대한설비공학회 학술발표대회논문집 Vol.2013 No.6
The energy conservation can be accomplished by the proper control of a heat pump boiler system. In this study, the control algorithm for a heat pump compressor was developed. For the cooling and heating mode, the setpoint and control algorithm was developed. In order to verify the control performance of the algorithm, tests were performed under the standard cooling and heating condition. Test results showed the effective control of a heat pump compressor.
응축형 가스보일러시스템의 제어 알고리즘 개발을 위한 효과적인 동적모델
한도영(Doyoung Han),김성학(Sunghak Kim) 대한설비공학회 2008 설비공학 논문집 Vol.20 No.6
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 condensing gas boiler unit, effective operations of the system are necessary. In this study, mathematical models of a condensing gas boiler system were developed in order to develop control algorithms of the system. These include dynamic models of a blower, a gas valve, a pump, a burner, a boiler heat exchanger, and a hot water heat exchanger. Control algorithms of a blower, a gas valve, and a pump were also assumed. Simulation results showed good predictions of dynamic behaviors of a boiler system. Therefore, the simulation program developed for this study may be effectively used for the development of control algorithms of a boiler system.
한도영(Doyoung Han),여경목(Kyungmok Yeo) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
Energy savings could be accomplished through the appropriate use of the exhaust heat in a bio-cleanroom. The recovered heat from the exhaust air may be used for the heat pump system in a bio-cleanroom. In this study, the mathematical model of a bio-cleanroom heat pump system was developed. This includes static and dynamic models for a compressor, an electric expansion valve, heat exchangers, and fans. To identify the effectiveness of the mathematical model, the system COP's with respect to speed of a compressor and fans were predicted, and the control of an electric expansion valve was simulated. Test results showed that the mathematical model developed for this study may be effectively used for the development of the control algorithm of a bio-cleanroom heat pump system.
한도영(Doyoung Han),권형진(Hyungjin Kwon) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
The control algorithms for the electronic timer, which regulate the fuel injection timing of the Diesel engine fuel injection system, were developed by using the simplified effective dynamic models.<br/> The electronic timer assembly was modeled as the first order with time delay. The various parameters in the model were obtained from experimental data. This model was effectively used for the development of control algorithms of the fuel injection timing system.<br/> The displacement control algorithm and the rpm-disturbance control algorithm were used for the fuel injection timing control. These control algorithms result in the effective and practical control of the fuel injection timing.<br/>
한도영(Doyoung Han),김성학(Sunghak Kim),정경열(Kyungyul Chung) 한국연소학회 2008 KOSCOSYMPOSIUM논문집 Vol.- No.-
The energy consumption for a house heating may be greatly reduced by replacing a noncondensing gas boiler unit to a condensing unit. To save the operating cost of a heating system, the optimal operation of a boiler unit is necessary. Mathematical models of a condensing gas boiler system, which are composed of dynamic models for a blower, a gas valve, a pump, a pipe, a burner, a boiler heat exchanger, and a hot water heat exchanger, were developed. Control algorithms of a blower, a gas valve, and a pump were selected. Dynamic models along with control algorithms were used to analyse control performances of a boiler system. Simulation was performed by using a computer program. Simulation results showed good predictions of dynamic behaviors of a boiler system. Therefore, dynamic models developed for this study may be effectively used for the optimal control algorithm development and the control performance prediction of a condensing gas boiler system.