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There is rather urgent demand for the knowledge of house heating and cooling and hot water supplying by solar energy. Since mens understanding the limit of fossil fuel resources in the crust and the hustling research activities have been driven by the sensitive governments after the 1973 oil shock or energy crisis through the resource nationalism.
In the solar energy utilization for the home energy, up to now; the flat plate collectors are to be dealt as the most important factors among the solar systems, not only because their performance characteristics are crucial for the efficiencies of the systems, but also because the economic feasibility studies have shown that the flat plate collectors are the most promising candidates for the house structures as wll as energy savers.
This work pays some attentions on the so far developed theoretical and experimental handling of the heat collecting processes by the flat plate collectors from the solar radiation to the thermal conversion along with heat transfer particularly the thickness of the collector plate. the sizes of the fluid driving pipes, and the separation distances between the pipes are taken into consideration as the influencing parameters for the collector efficiencies. A series of experiments have been carried out in order to correlate the above mentioned parameters to the collector efficiencies. Several box types of the finned collectors have been designed and checked their performance characteristics along with the variation of the shape and the different design parameters.
As a collector plate materials copper steel, and aluminium plate were used, The performance characteristics showed that copper was superior to steel and steel was better than aluminium. The best collecting performance for pipe distances are between 2.5cm to 7.5cm, and for plate thickness and pipe distances, thicker the plate narrower the seperation distances, in reven1e, thinner the plate, wider the seperation distances has been noticed. Among the box type of finned collectors, for the 15mm * 9mm size collectors, the best efficiency appeared to the plate thickness of 1.2mm and next to the plate thickness of 0.6mm and for the 70mm *35mm size collectors the overall efficiencies appeared less then 15 mm * 9 mm size collectors.
In the solar energy utilization for the home energy, up to now; the flat plate collectors are to be dealt as the most important factors among the solar systems, not only because their performance characteristics are crucial for the efficiencies of the systems, but also because the economic feasibility studies have shown that the flat plate collectors are the most promising candidates for the house structures as wll as energy savers.
This work pays some attentions on the so far developed theoretical and experimental handling of the heat collecting processes by the flat plate collectors from the solar radiation to the thermal conversion along with heat transfer particularly the thickness of the collector plate. the sizes of the fluid driving pipes, and the separation distances between the pipes are taken into consideration as the influencing parameters for the collector efficiencies. A series of experiments have been carried out in order to correlate the above mentioned parameters to the collector efficiencies. Several box types of the finned collectors have been designed and checked their performance characteristics along with the variation of the shape and the different design parameters.
As a collector plate materials copper steel, and aluminium plate were used, The performance characteristics showed that copper was superior to steel and steel was better than aluminium. The best collecting performance for pipe distances are between 2.5cm to 7.5cm, and for plate thickness and pipe distances, thicker the plate narrower the seperation distances, in reven1e, thinner the plate, wider the seperation distances has been noticed. Among the box type of finned collectors, for the 15mm * 9mm size collectors, the best efficiency appeared to the plate thickness of 1.2mm and next to the plate thickness of 0.6mm and for the 70mm *35mm size collectors the overall efficiencies appeared less then 15 mm * 9 mm size collectors.
목차
Abstract
1. 緖論
2. 太陽熱集熱器
3. 箱子型FIN集熱器實驗
4. 集熱實驗의 考察
5. 集熱器의 性能
6. 結論
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