Powering system combining photovoltaic photo-thermal heat collector and fuel gas-steam combined circulation unit

Abstract

A powering system combining a photovoltaic photo-thermal heat collector and a fuel gas-steam combined circulation unit comprises the fuel gas-steam combined circulation unit, a PVT heat collecting system and a drainage pump; part of condensed water discharged from a condensed water pump of the fuel gas-steam combined circulation unit enters the PVT heat collecting system to be heated, the condensed water heated by the PVT heat collecting system and the rest condensed water discharged by the condensed water pump are converged to enter a water working medium inlet of a low-pressure coal economizer of a waste heat boiler of the fuel gas-steam combined circulation unit, and the electrical energy output end of the PVT heat collecting system is connected with a load or a power grid. The PVT heat collecting system and the fuel gas-steam combined circulation unit are organically combined together, thus well solving the problems of radiating of a photovoltaic battery and the waste heat utilization, greatly improving the comprehensive utilization rate of resources, reducing the consumption of natural gas and facilitating the energy saving and emission reduction of a fuel gas-steam combined power plant.

Description

technical field [0001] The invention relates to a heating and power supply system combining a PVT photovoltaic photothermal heat collecting device and a gas-steam combined cycle unit, belonging to the technical field of solar energy. Background technique [0002] Photovoltaic power generation technology is based on photovoltaic cells, and uses the photovoltaic effect generated by the semiconductor P-N junction to directly convert light energy into electrical energy. During the power generation process of photovoltaic cells, the proportion of incident solar energy converted into electrical energy is about 15%, and most of the remaining energy is converted into heat, which increases the temperature of photovoltaic cells, and a large increase in the temperature of photovoltaic cells will lead to a decrease in its photoelectric conversion efficiency. Studies have shown that the photoelectric conversion efficiency decreases by 0.5% when the temperature of photovoltaic cells incre...

AI Technical Summary

Problems solved by technology

However, natural gas is facing the problem of scarcity of resources, and it is difficult to meet the power supply requirements by relying on natural gas for power generation

[0004] In short, the above energy supply systems are not ideal in terms of energy utilization rate, power generation cost, energy saving and emission reduction, etc. It is necessary to further study the comprehensive utilization technology of new energy

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