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이종화(Jonghwa Lee),정택수(Taeksu Jung),조종두(Chongdu Cho),김주용(Jooyong Kim) 대한설비공학회 2013 대한설비공학회 학술발표대회논문집 Vol.2013 No.11
District heating system on an apartment block recently attracts attention to combine hot water supply pipes which are separated with space heating pipe and warm water supply pipe in current system, and this new system is applied for a part of European nations. In combined system, only one heat source is supplied to the house and distributed for space heating and warm water generating by household substation. Therefore, the effective distribution of supplied heat source in accordance with purposes becomes more important. This paper presents a new three-way proportional control valve for mentioned combined heat source system in district heating with experimental result. The valve operates for controls to divides heat source into two different directions : hot water distributor for space heating and household substation for warm water supply in accordance with the pressure drops of tap water induced by the user. This study shows the controllability and performance of the mechanical control three-way proportional valve for common pipe district heating system with result of experiment.
이종화(Jonghwa Lee),정택수(Taeksu Jung),조종두(Chongdu Cho),김주용(Jooyong Kim) 대한설비공학회 2014 설비공학 논문집 Vol.26 No.5
Korea District heating corp. recently give an attention to combine the district heating and supply pipes as a two pipe system that are in the present system separated with room heating and warm water supply pipe, and the two pipe system is commonly applied for heating service in European countries. In the new two pipe system, only one heat source is supplied to a house and partitioned into room heating and warm water supply by household substation. So the effective distribution of supplied heat source in accordance to user intention is very important. This paper presents the development and performance test of three-way proportional control valve for a combined heat source system in district heating. The proposed valve is controlled to partition heat source into two different directions:hot water distributor for space heating and household substation for warm water supply in response to the pressure drops of tap water caused by the user. The performance investigation is shown within 3% of error compared to the theoretical model of the three-way proportional valve and its controllability is verified.