廢熱氣流風力發電機之最佳效能研究

Study on optimal efficiency for wind generator of waste heat flow

郭彥志(Yan-Jhih Guo)

指導教授 ： 顏義和

國立虎尾科技大學/電機資訊學院/電機工程研究所/碩士(2011年)

摘要

本研究主旨是將空調散熱系統的廢熱氣流集中進行發電，並且搭配最大功率追蹤的控制方法，使發電機可以達到最大功率輸出，在不影響散熱系統效能的前提下，找出風力發電機與導風管出風口的最佳距離。因為廢熱氣流為一可變的固定風速，因此最大功率追蹤的方法採用查表法，查表法比傳統型的擾動觀察法以及三點權位法在可變的固定風速下更為穩定，利用此控制方法可以讓發電機達到最大功率輸出。將可調頻率的人工風源當作是散熱系統的散熱風扇，模擬集風管中散熱氣流的風速大小，在變頻器給予40Hz、50Hz以及60Hz的情況下，相當於風速7.1m/s、8.6m/s以及10.6m/s，將風力發電機產生的發電量除以人工風源的耗電量，便可得到一功率回收百分比。從實驗結果得知，在40Hz、50Hz以及60Hz的情況下，可回收7.4%、6.9%以及6.2%的用電量，達到在夏季可以減輕用電量的效果。

關鍵字

廢熱氣流風力發電 ； 最大功率追蹤 ； 查表法

並列摘要

The purpose of this study is used waste heat flow to generate power. Without affecting the efficiency of cooling system, the best distance between a wind turbine and the exhaust pipe outlet could be found by collecting waste hot air which from air-conditioner cooling system and using Maximum Power Point Tracking (MPPT). Because the wind speed of waste hot air is variable, look up table (LUT) is used to track the power because LUT is steadier than traditional MPPT method when under the variable wind speed. By using LUT, a wind turbine can achieve the maximum power of output. Using adjust artificial wind power to simulate waste hot air, inverter is used under different frequency command, equal to 7.1m/s, 8.6m/s, and 10.6m/s. Through the result of experiment, generator can recycle 8.16%, 9.29%, and 9.22% of electronic power. As a result, the consumption of electronic power can be less with artificial wind power.

並列關鍵字

Waste heat flow of wind power ； Maximum Power Point Tracking(MPPT) ； look up table (LUT)

參考文獻

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