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Abstract:
Trees have electrical activity; a continuous electrical power can be produced between electrodes inserted in the tree’s trunk and its contiguous soil, which allows for flowing ions thus producing electricity. This paper presents the analysis and evaluation of electrical signals in a variety of living trees in Palestine's environment. Several tests have been conducted outside of laboratories under the natural situations of trees, focusing on the analysis of open-circuit voltage (VOC) and short-circuit current (ISC) produced from eleven kinds of trees using fifteen types of electrodes pairs. The results show that the optimal pair of electrodes that allow producing the highest levels of VOC in the trees is Zn-Cu, as the Zinc electrode is the trunk's electrode while the copper electrode is the ground's electrode. The generated voltage levels using the Zn-Cu pair of electrodes were in the range between 995 mV to 1090 mV based on the type of tree. Date Palm and Eucalyptus trees generated the highest electrical power 0.7mW and 0.6mW, respectively. Although the electrical power generated from trees is low, it is possible by using electrical power booster and harvesting circuits to power up low-power devices such as LED lights, scientific calculator, charging mobile phone, fire sensors, or biosensors for detection of environmental conditions.
Keywords: renewable energy, tree energy, Palestine's environment, short-circuit current, open-circuit voltage, low-power sensors.
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