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塑料温室-高塔型太阳能风力发电装置的原理示于图1。图中,塑料温室内的地表为吸热面,它吸收太阳的热量并加热流动的空气,同时把多余的热量贮存起来,以便在无阳光时继续加热空气,使装置运行。高塔矗立在温室中央,在塔的下部和温室之间有良好的通道,热空气能自由地流进高塔,产生抽力。若将通道做成环形收缩气道,置风力机于气道的出口,在收缩气道中膨胀加速的气流,便冲动风力机转动,带动发电机发电。在这种装置中,由于在风轮前能获得较自然风高得多的流速,因而用较小的风轮尺寸可获得较大的功率。
The principle of a plastic greenhouse-tower solar wind turbine is shown in Figure 1. The surface of the plastic greenhouse is a heat-absorbing surface, which absorbs the sun’s heat and heats the flowing air, storing excess heat for heating the unit when no sunlight is available. The tower stands in the center of the greenhouse, with good access between the lower part of the tower and the greenhouse. The hot air flows freely into the tower, creating a suction force. If the passageway is made into a ring-shaped contraction airway, the wind machine is set at the outlet of the airway and the accelerated airflow is expanded in the contraction airway, then the windmill is driven to rotate to drive the generator to generate electricity. In this arrangement, larger power can be obtained with a smaller rotor size, since a much higher flow rate can be achieved before the rotor than natural wind.