Atmospheric temperature difference power generation device

Abstract

The invention discloses an atmospheric temperature difference power generation device, which mainly solves the problems of low efficiency and heat utilization rate, poor stability and the like of the conventional device. The device comprises a heat storage box (201) with a heat insulation layer (202), an external heat exchange fin (204), an internal heat exchange fin (206), and a semiconductor temperature difference power generation sheet (205) between the external heat exchange fin (204) and the internal heat exchange fin (206), wherein a liquid heat storage working medium (203) of which the temperature slowly changes along with fluctuation of air temperature is filled in the heat storage box (201); after long-term accumulation and counteracting of heat, the temperature of the liquid heat storage working medium (203) tends to be an average air temperature; and dynamic temperature difference between dynamic air temperature and average air temperature is formed inside and outside the heat storage box (201), is fed into the two ends of the semiconductor temperature difference power generation sheet (205) through the external heat exchange fin (204) and the internal heat exchange fin (206) and is further converted into voltage which is directly proportional to the dynamic temperature difference and output. The device has the characteristics of high efficiency and heat utilization rate and continuous electric energy output and can be used for providing power for low-power-consumption electronic equipment such as a distributed wireless sensor node for a long time.

Description

technical field [0001] The invention belongs to the technical field of electromechanical devices, in particular to an atmospheric temperature difference power generation device, which can absorb energy from the atmosphere to generate electricity by utilizing the temperature difference of the atmosphere with time. Background technique [0002] The fluctuation of atmospheric temperature over time essentially characterizes the transfer and flow of energy, and its energy has the characteristics of ubiquitous and continuous output. The temperature difference caused by the change of atmospheric temperature acts on the thermal-electric transducer to obtain electric energy output, which can be used as a source of environmental energy collection. For deserts, mountainous areas and other occasions where power supply cannot be provided by erecting cables, "local materials" can be used to directly absorb energy from the atmosphere to provide power for electronic equipment. [0003] At ...

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Problems solved by technology

[0004] 1. The flow and conversion process of energy can be summarized as a two-stage process of first converting temperature difference energy into mechanical energy, and then converting mechanical energy into electrical energy. Compared with the first-level process of directly converting temperature difference energy into electrical energy, the efficiency is lower

[0005] 2. Only when the atmospheric temperature is higher than the boiling point of the liquid in the heat exchange sheet, the liquid can absorb heat and evaporate, and drive the turbo generator to generate electricity. Otherwise, there will be no electric energy output. Therefore, a considerable part of the low temperature and waste heat energy will not be used. , resulting in discontinuous power output and low heat utilization

[0006] 3. Due to the inclusion of pneumatic components such as steam turbines, long-term operation is likely to cause wear between parts. In addition, because the low-boiling liquid in the heat exchanger is usually corrosive, long-term operation will aggravate the wear of multiple parts of the device. lead to poor long-term job stability

[0007] 4. There are many connecting links between external heat exchangers, built-in heat exchangers, conduits and steam turbine chambers and other components, and the interfaces are complicated, so it is difficult to ensure good air tightness to maintain normal work. The installation and post-production of the device difficult to maintain

[0008] 5. The device is bulky and heavy, requiring the installation site to be empty and flat and occupy a large space, so the actual application is limited by the site

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