Cold and heat energy storing and conversion system and method

Abstract

The invention discloses cold and heat energy storing and conversion system and method. With the adoption of the cold and heat energy storing and conversion system and method, electricity energy, heat energy and other surplus energy are stored, converted or transported in a form of aqueous solutions of LiBr, LiCl and Ca2Cl or a mixed solution of two or three of LiBr, LiCl and Ca2Cl; in case of need, the mechanical energy and electricity energy can be output through single-stage or multi-stage series-connected retarded osmosis or the electricity output can be output through reverse electrodialysis according to the osmotic pressure principle, or the mechanical energy and the electricity can be output to heat or cool a building or technically process and heat in a form of heat energy or cold energy under the water evaporating effect and the effect that thick solutions absorbs the water vapor.

Description

technical field [0001] The invention relates to an energy storage system based on solution and osmotic pressure. Background technique [0002] Various forms of energy such as thermal energy, electrical energy, and mechanical energy are needed in production and life. In most cases, there is always a certain difference between the user's demand for various energies and the rated output capacity of the energy supply system. There are peaks and valleys of load, such as buildings. There are big differences during the day, and renewable energy such as solar energy and wind energy are easily affected by the weather and sometimes disappear; thus, there is a need for energy storage, and various energy storage technologies have emerged and have been applied to varying degrees. [0003] There are many types of energy storage technologies at present, but most of them are limited to the storage and conversion of one form of energy, that is, they can only store electricity, or store cold...

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Problems solved by technology

[0005] In the air-conditioning system, the concentration difference of salt solution is used to store energy with a high density, which improves the energy utilization efficiency of the air-conditioning system. However, the current solution energy storage technology is only limited to storing heat energy for cooling and heat conversion, and buildings often have both heat and electricity. demand, the current solution energy storage cannot meet the needs of buildings for the storage and mutual conversion of thermal energy and electric energy, and this system cannot function when heating and air conditioning are not needed, but electricity is needed; In the energy system, the current solution energy storage air conditioning system is also difficult to store, convert or adjust the heat and electricity output of the unit through energy storage

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