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It is desirable to collect the solar thermal energy at relatively high temperature in order to minimize the size of thermal storage system and to enlarge the scope of solar thermal energy utilization.
In this study, to develop a solar collector that has both advantages of collecting solar thermal energy at high temperature and fixing conveniently the collector system for long term period, a cylindrical parabolique concentrating solar collector (M.C.P.C.S.C) was designed, which has several rows of parabolique reflectors and thin thickness such as the flat-plate solar collector, maintaining the optical form of concentrating solar collector.
The thermal performance of the M.C.P.C.S.C. newly designed in this study was analysed theoretically and experimentally.
The results are summarized as follows:
1) prediction equation for outlet temperature, To, of heat transfer fluid and for the thermal efficiency, η, of the collector were derived as;
[수식참조]
2) When the insolation on the tilted solar collector surface, Ic, was 900 - 950 W/㎡ and the heat transfer fluid was not circulated in tubular absorber, the maximum temperature on the absorber surface was 100 - 118℃, this result suggested that the heat transfer fluid could be heated up to 98 - 116℃.
The maximum temperature on the absorber surface was decreased with the increase of the collector shape factor, Lp/Lw
3) There was a good agreement between the experimental and theoretical value of solar collector efficiency, η, which was proportional to the collector shape factor, Lp/Lw.
4) It is desirable to continue the study on the relationship between the collector shape factor, Lp/Lw, and the thermal efficiency of solar collector.
In this study, to develop a solar collector that has both advantages of collecting solar thermal energy at high temperature and fixing conveniently the collector system for long term period, a cylindrical parabolique concentrating solar collector (M.C.P.C.S.C) was designed, which has several rows of parabolique reflectors and thin thickness such as the flat-plate solar collector, maintaining the optical form of concentrating solar collector.
The thermal performance of the M.C.P.C.S.C. newly designed in this study was analysed theoretically and experimentally.
The results are summarized as follows:
1) prediction equation for outlet temperature, To, of heat transfer fluid and for the thermal efficiency, η, of the collector were derived as;
[수식참조]
2) When the insolation on the tilted solar collector surface, Ic, was 900 - 950 W/㎡ and the heat transfer fluid was not circulated in tubular absorber, the maximum temperature on the absorber surface was 100 - 118℃, this result suggested that the heat transfer fluid could be heated up to 98 - 116℃.
The maximum temperature on the absorber surface was decreased with the increase of the collector shape factor, Lp/Lw
3) There was a good agreement between the experimental and theoretical value of solar collector efficiency, η, which was proportional to the collector shape factor, Lp/Lw.
4) It is desirable to continue the study on the relationship between the collector shape factor, Lp/Lw, and the thermal efficiency of solar collector.
목차
ABSTRACT
1. 緖論
2. 實驗遂行地域의 太陽强度分析
3. 多段 抛物 反射曲面으로 된 二次元 集光式 太陽熱 集熱器 構成
4. 次元解析에 依한 集熱器의 熱效率, η, 豫測
5. 實驗裝置 및 方法
6. 實驗結果 및 考察
7. 結論
REFERENCES
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