太陽能集熱板暨複合式系統應用於寒流期間以降低魚塭之寒害損失

碩士論文
2019 - 07

碩士生: 楊宇婷

畢業年分: 2019年7月

論文名稱: 太陽能集熱板暨複合式系統應用於寒流期間以降低魚塭之寒害損失 (中文) / A Study of Solar Combisystem Developed in an Aquatic Farm for Mitigating Hypothermia Damage During Cold Stream Event

中文摘要: 

再生能源加熱系統用於養殖魚塭以維持適當的水溫來防止養殖生物因為低溫而死亡,但在寒流期間將整個養殖魚塭維持或加熱在特定水溫是不切實際的。 因此,從技術和經濟考量,在水池中提供局部和適當的水溫區是最實際的方法。 STAR-CCM+ 用於模擬極端天氣下魚池的三維溫度分佈圖,並計算其生存區的空間體積; TRNSYS 17用於模擬太陽能複合式加熱系統;田口法(Taguchi method)用於優化養殖魚塭的幾何形狀。

STAR-CCM +中,比較了八個參數(入口1和入口2之間的距離、兩個入口的高度、出口位置、入口速度、檔板長度、檔板位置、檔板深度和檔板數),根據在魚池中的生存區的差異性選了其中四個參數(兩個入口的高度、出口位置、檔板長度和和檔板位置)以建立田口法的正交陣列,並用以優化。優化後的養殖魚塭的生存區增加了40%。

TRNSYS 中,比較了三個加熱系統(鍋爐加熱系統、熱泵和鍋爐加熱系統、以及太陽能和熱泵和鍋爐加熱系統的組合),並列出其製熱量、能源貢獻比、成本回收期及二氧化碳排放量。雖然太陽能集熱板暨熱泵複合式加熱系統有效降低CO2排放量,但不符合經濟成本,因此並不最合適的加熱系統。結果表明,鍋爐加熱系統最適合正值寒流時的優化後的養殖魚塭,特別是即時加熱的情況。

英文摘要: 

 
The renewable heating system is employed in the aquatic farm to prevent the hypothermia of aquatic creature by maintaining the appropriate water temperature. However, it is unpractical to heat and maintain the aquatic farm at a certain water temperature during a cold stream event. Accordingly, providing a localized and appropriate water temperature zone in the water pool is a plausible solution in terms of technical and economic aspects, and an aquatic creature would instinctively aggregate in the “survival zone”. STAR-CCM+ was employed to simulate the 3D temperature condition of an aquatic farm in the extreme weather, and examine the volume of survival zone. TRNSYS was used to simulate the solar collector and heat pump combisystem under the required heating capacity. The Taguchi method was used to optimize the geometry of the aquatic farm.
In STAR-CCM+, eight parameters (distance between inlet 1 and inlet 2, two inlets of the height, outlets positions, inlets velocity as fixed mass flow rate, barrier length, barrier position, barrier thickness, and barrier numbers) were compared, Four of them (two inlets of the height, outlets positions, barrier length, and barrier position) were selected according to their difference percentage of the survival zone and set up the orthogonal array to deploy in Taguchi method. The survival zone of the aquatic farm’s optimized geometry of increases by 40%.
In TRNSYS, three heating system (boiler heating system, heat pump, and boiler heating system, and combination of solar and heat pump and boiler heating system) were compared with their heating gain, contributions, payback period and CO2 emissions. Although the solar combisystems were effective in reducing CO2 emissions, they were not economical. Therefore, the solar combisystems were not the most suitable heating system for cold stream.

The results showed that the boiler heating system was most suitable for the optimized geometry of the aquatic farm during the cold current, especially in the case of instant heating.

檔案下載

研究成員

  • 楊宇婷

指導老師

  • 李約亨

Back To Top