Heat pipe type vacuum tube semiconductor thermoelectric water heating system

Abstract

The invention provides a heat pipe type vacuum tube semiconductor thermoelectric water heating system, which comprises a vacuum tube heat collecting system, a semiconductor double-layer heat exchange header, a water tank and a waterway system, wherein the semiconductor double-layer heat exchange header is divided into two layers: a direct heat exchange layer and a semiconductor cooling layer. In a sunny day, circulating water passes through the semiconductor cooling layer, normal pressure and high temperature overheating steam is fully filled in the direct heat exchange layer, and a semiconductor thermoelectric piece works to generate electric power and hot water; and in a cloudy day or when the hot water demand is large, the circulating water passes through the direct heat exchange layerand the semiconductor cooling layer to generate hot water. The system of the invention can be switched between a thermoelectric water heating mode and a single water heating mode, under the thermoelectric water heating mode, the heat end of the semiconductor thermoelectric piece can keep high temperature under the normal pressure, and under the single water heating mode, the hot water with highertemperature can be obtained. The system can adjust the generation relationship of the electric power and the hot water according to seasons and requirements, and improves the quality and the efficiency of the solar energy utilization in each season.

Description

technical field [0001] The invention belongs to the technical field of solar photothermal utilization devices, in particular to a heat pipe type vacuum tube semiconductor thermoelectric water heating system. Background technique [0002] Solar energy is a clean, efficient and inexhaustible new energy source, so the governments of all countries regard the utilization of solar energy resources as an important content of the national sustainable development strategy. Among the solar energy utilization methods, the light-to-heat conversion technology is the most mature, with the most products and relatively low cost. In light-to-heat conversion, the application of solar water heaters is currently the most widely used, the most mature technology, and the most economical, and the vacuum tube solar water heaters are the main ones, accounting for 95% of the domestic market share. Its structure is simple and easy to manufacture, its price is relatively low, and its efficiency is sti...

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Problems solved by technology

[0003] Solar water heater thermoelectric power generation device (application number 200920111462), solar heat pipe thermoelectric power generation device (application number 200520118366), a kind of solar vacuum tube thermal power generation device (application number 201020048950), a kind of self-generating solar water heater (application number 200920172230), etc. The concept of the joint application of solar heat collectors and semiconductor thermoelectric sheets, but the common problem is that the system works in the preset power generation mode regardless of the weather. When the sun is not ideal on cloudy and rainy days, the vacuum tube cannot reach a higher temperature At this time, the power generation efficiency is very low and hot water of sufficient temperature cannot be obtained; the system using water as the heat source of the semiconductor cooling plate has a large specific heat capacity of water and cannot operate at a high temperature exceeding 100 degrees Celsius under normal pressure, so the semiconductor hot end works The temperature is low, and the power generation efficiency of the system is low

At present, no one has proposed a device that can increase the temperature of the hot end of the semiconductor thermoelectric sheet to improve power generation efficiency, and can also use the higher hot water temperature of the vacuum tube in rainy weather.

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