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200kW 탑형 태양열발전시스템을 위한 Heliostat 반사면 구조 설계
박영칠 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.2
Heliostatinthetowertypesolarthermalpowerplantisasuntrackingmirrorsystem toreflectthesolarenergy tothereceiverandtheopticalperformanceofitaffectstotheefficiencyofwholepowerplantmostsignificantly. Thusaproperdesign ofstructureoftheheliostatreflectivesurfacecouldbethemostimportantstepin the constructionofsuchpowerplant. Theworkpresentedhereisadesignofstructureofopticalsurfaceofheliostat,whichwillbeusedin200kW solarthermalpowerplant.Thereceiverlocatedat43(m)highfrom groundintowerhas2x2(m)rectangularshape. Wefirstdevelopedthesoftwaretooltosimulatetheenergyconcentrationcharacteristicsofheliostatusingtheray tracingtechnique.Then,theshapeofheliostatreflectivesurfaceisdesignedwiththeconsiderationofheliostat's energyconcentrationcharacteristics,productioncostandproductivity.Thedesignedheliostat'sreflectivesurface hasastructureformedbycantingfourof1x1(m)rectangularflatplatemirrorfacetandthecenterofeachmirror facetislocatedonthesphericalsurface,wherethesphericalsurfaceisformulatedbythemirrorfacetmounting frame.
200kW 탑형 태양열발전시스템의 Heliostat Field 설계
박영칠 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.5
Heliostat field is the most important subsystem in the tower type solar thermal power plant since its optical performance affects the total system efficiency most significantly while the construction cost of it is the major part of total construction cost in such a power plant. Thus a well designed heliostat field to maximize the optical efficiency as well as to minimize the land usage is very important. This work presents methodology, procedures and result of heliostat filed design for 200kW solar thermal power plant built recently in Daegu, Korea. A 2x2(m) rectangular shaped receiver located at 43(m) high and tilted 28º toward heliostat field, 450 of heliostats of which the reflective surface is formed by 4 of 1x1(m) flat plate mirror facet, and the land area having about 140x120(m) size are used to form the heliostat field. A procedure to deploy 450 heliostats in radial staggered nonblocking formation is developed. Also the procedures to compute the cosine effect, intercept ratio, blocking and shading ratio in the field are developed. Finally the heliostat filed is designed by finding the optimal radial distance and azimuthal spacing in radial staggered nonblocking formation such that the designed heliostat field optical efficiency could be maximized. The designed heliostat field has 77.1% of annual average optical efficiency, which is obtained by annually averaging the optical efficiencies computed between the time of where sun elevation angle becomes 10º after sunrise and the time of where sun elevation angle becomes 10º before sunset in each day.
박영칠,Park, Yeong-Chil 한국대학교육협의회 2005 大學敎育 Vol.137 No.-
산학협력단은 당초 설립목적에 따른 역할을 수행하는 조직으로 하루 빨리 정착되어야 한다. 이를 위하여 대학은 물론 정부, 지자체, 기업에 이르기까지 모든 산학협력의 주체들이 함께 노력하는 것이 필요하다.