單一矩形通道或多矩形通道於平板型太陽能熱電複合系統之熱傳效率改善研究

The Heat-Transfer Efficiency Improvement of Flat-Plate Solar Hybrid Photovoltaic/Thermal Systems with Single- and Multi-Pass Rectangular Flow ducts.

黃君維(Jun-Wei Huang)

指導教授 ： 何啟東

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2008年)

https://doi.org/10.6846/TKU.2008.00705

摘要

太陽能熱電複合系統可將太陽光能量轉換成以電、熱兩種不同形式輸出，可提高能源使用效率及減少能量耗損。系統功用在於加熱流體如空氣或水，以供應公共或家庭使用，也可發電以驅動耗電量小之電器。本研究中在不同通道形式及流體質量流率影響結果較為明顯。
本研究分別針對太陽能空氣加熱器系統及太陽能熱電複合系統，考慮通道側邊之溫度分佈及裝置側邊之熱損失，以不同操作形式及設計參數來進行以下討論：(一)固定截面積下，改變通道設計形式或下通道之通道數、(二)流體質量流率、(三)流體進口溫度、(四)太陽光之入射量、(五)加裝太陽能電池等對系統效率之影響，並與單通道系統比較，計算各系統提升之熱傳改善率。研究結果顯示，增加下通道之通道數及流體質量流率會有利集熱效率之提升。在加裝太陽能電池並於室外陽光下實驗後，可得知太陽能熱電複合系統之總效率高於加裝前之集熱效率。

關鍵字

太陽能熱電複合系統 ； 太陽能空氣加熱器 ； 多矩形通道 ； 熱傳效率改善

並列摘要

The new solar hybrid photovoltaic/thermal (PV/T) system with multi-pass rectangular flow ducts is designed to improve the overall efficiency of thermal heat-transfer efficiency and PV cell efficiency. The theoretical formulations of the solar hybrid PV/T system are developed by making the energy balance and the resultant equations are solved by the fourth-order Runge–Kutta method. The factors affecting the device performance are the numbers of flow ducts, air mass flow rate, inlet air temperature and incident solar radiation. The theoretical results indicate that the heat transfer efficiency of solar air heater and solar hybrid PV/T systems increases with increasing the numbers of the rectangular flow ducts and air mass flow rate but decreasing with the incident solar radiation and inlet air temperature. The experimental apparatus of flat-plate solar air heaters and solar hybrid PV/T systems are also set up to confirm the accuracy of the theoretical predictions. The comparison between the theoretical predictions and experimental results shows that the good agreement is achieved in the present study.

並列關鍵字

solar hybrid PVT systems ； solar air heater ； multi-pass rectangular flow ducts ； heat-transfer efficiency improvemen

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