Solar-powered water heating and heat-electricity converting device

Abstract

The invention discloses a solar-powered water heating and heat-electricity converting device. The device comprises a water storage tank, a heat exchanger, a turbine, a fractional condensation unit and at least one evacuated tube collector connected in series/in parallel, wherein the water outlet of the evacuated tube collector is connected with the water inlet of the water storage tank; the water outlet of the water storage tank is connected with the hot side inlet of the heat exchanger; the hot side outlet of the heat exchanger is connected with the water inlet of the evacuated tube collector through a first circulating water pump; the cold side of the heat exchanger is connected with the turbine and the fractional condensation unit through a Kalina circulating secondary loop respectively; and the turbine is connected with an electric generator through a transmission case. The solar-powered water heating and heat-electricity converting device improves photo-thermal conversion efficiency and lowers system cost through the evacuated tube collector.

Description

technical field [0001] The invention relates to a hot water thermoelectric conversion device, in particular to a solar hot water thermoelectric conversion device. Background technique [0002] Solar energy refers to the radiant energy of sunlight. The atomic nuclear reaction that fuses "hydrogen" into "helium" in the sun continuously releases huge energy and continuously radiates energy to the outer space. This energy is solar energy. Solar energy is a green, clean and inexhaustible energy source. There are generally three types of solar energy utilization by human beings: solar thermal, photoelectric and photochemical energy conversion, and the conversion methods used to generate electricity are only solar thermal and photoelectric conversion. The form of photoelectric conversion is relatively simple, and the main form of utilization is solar cells. There are many ways of solar thermal power conversion and its equipment. One of the most common principles of solar therma...

AI Technical Summary

Problems solved by technology

Although at present, in the design of some more sophisticated tower systems, different heliostats start to use spherical surfaces with different curvature radii to reduce the size of the sun’s focused spot on the tower, but the complexity of optical design has greatly increased and the manufacturing cost has also increased. followed by substantial growth

[0009] 2. A large number of heliostats are built around the central tower. The establishment of the huge central tower must ensure that the heliostats cannot block the light from each other.

The disadvantage of the dish system is that it is expensive, and it is also the first among all kinds of systems.

At present, the initial investment cost of the dish thermal power generation system is as high as 47,000 to 64,000 yuan

Although the concentration ratio of the dish system is very high and can reach high temperatures of 2000 °C, such high temperatures are not necessary or even destructive for current thermal power generation technologies.

Therefore, the receiver of the dish system is generally not placed in the focus, but is properly placed in a lower temperature zone according to the performance index requirements, so that the advantages of high concentration cannot actually be fully utilized and heat storage Difficult, hot molten salt heat storage technology is dangerous and expensive

[0022] To sum up, the existing three solar thermal power generation technologies are all high-temperature solar power generation technologies, which greatly increase the performance requirements of solar collectors, and will inevitably increase the capital investment in solar collectors. , increasing the initial investment

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