Heat transferring and storing separating type solar light and heat using method and system

Abstract

The invention discloses a heat transferring and storing separating type solar light and heat using method and system. The heat transferring and storing separating type solar light and heat using system comprises a solar heat collecting field, a heat storing and releasing system and a heat energy using system. The solar heat collecting field comprises a solar heat collecting device, a low temperature heat transferring medium main pipe and a high temperature heat transferring medium main pipe. The heat storing and releasing system and the heat energy using system are located between the low temperature heat transferring medium main pipe and the high temperature heat transferring medium main pipe in a parallel mode. The heat storing and releasing system comprises a heat storing tank body. The heat storing tank body is internally divided into a top filling area, more than onemiddle filling areas and a bottom filling area according to different positions of filling energy storing mediums, wherein the top filling area, the middle filling areas and the bottom filling area communicate with one another in sequence. All filling areas are all provided with corresponding inlet switching valves. According to the heat transferring and storing separating type solar light and heat using method, by using a double loop system of heat transferring and storing separating, the heat transferring mediums are used in the solar heat collecting field for circularly absorbing solar energy, and heat exchanging is conducted in the heat transferring and releasing system through the energy storing mediums and heat transferring mediums for storing or releasing heat energy.

Description

technical field [0001] The invention relates to solar thermal utilization technology, in particular to a heat transfer and thermal storage separation type solar thermal utilization method and system. Background technique [0002] Solar thermal utilization refers to the concentration of solar radiation heat energy for power generation, refrigeration, heating and heating, and thermochemical hydrogen production, etc., to realize the utilization of solar thermal energy. Taking solar thermal power generation as an example, the current situation of solar thermal utilization is briefly described below. [0003] Solar thermal power generation, also known as Concentrating Solar Power (CSP for short), gathers direct solar light through a large number of mirrors in a focused manner, heats the working fluid, and generates high-temperature and high-pressure steam, which drives the steam turbine. generate electricity. According to solar energy collection methods, solar thermal power gen...

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Problems solved by technology

Existing heat storage systems generally use heat transfer media such as molten salt and heat transfer oil to store heat in storage tanks; due to the low heat capacity and poor heat storage capacity of gas heat transfer media, this method is not suitable for gas heat transfer medium

[0006] In order to concentrate heat energy and improve power generation efficiency, the daylighting panels / heat collectors that receive sunlight usually adopt a modular layout. When the heat of each group of solar collectors in the system is uneven, it will cause heat transfer medium in the pipeline system. Unbalanced resistance, leading to problems of biased flow and cut-off

Due to the poor heat transfer capacity of gas working fluid, high flow rate, and too long heat collection pipes, the above problems are particularly prominent in the trough solar heat collection field using air as the heat transfer medium, which seriously affects the solar heat collection field. Stable operation and heat transfer efficiency

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