Multi-stage compression energy storage device and method based on gas-liquid phase transition of carbon dioxide

Abstract

The invention relates to an energy storage device and method based on gas-liquid phase transition of carbon dioxide. The energy storage device based on the gas-liquid phase transition of carbon dioxide includes: a gas storage; a liquid storage tank; an energy storage component, which is arranged between the gas storage and the liquid storage tank, and the energy storage component includes a condenser and at least two compressed energy storage parts , the compression energy storage part includes a compressor and an energy storage heat exchanger; the energy release assembly is arranged between the gas storage and the liquid storage tank, and the energy release assembly includes an evaporator, an energy release cooler, and at least one expansion energy release part, The expansion energy release part includes the expander and the energy release heat exchanger; the heat exchange components include the cold storage tank, the heat storage tank and the heat recovery heat exchanger, and the cold storage tank and the heat storage tank are connected between the energy storage heat exchanger and the energy release heat exchanger. A heat exchange loop is formed between the heat exchangers, and the heat exchange medium can flow in the heat exchange loop; at least one of the condenser, energy release cooler, and heat recovery heat exchanger is connected to the evaporator. When energy is stored and released through the device, energy waste can be reduced and energy utilization rate can be improved.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a multi-stage compression energy storage device and method based on gas-liquid phase transition of carbon dioxide. Background technique [0002] With the development of society and economy, people's demand for energy is getting higher and higher, but the increase in energy consumption has made environmental problems more serious, and non-renewable traditional energy sources such as coal and oil are increasingly exhausted, and new energy sources such as solar energy and wind energy are vigorously developed. To slow down the traditional energy consumption has become an inevitable choice. Due to the intermittent and fluctuating characteristics of new energy, direct grid connection will have a certain impact on the grid. At the same time, it is difficult to maintain consistency between the time when users use electric energy and the time when renewable energy generates electri...

AI Technical Summary

Problems solved by technology

However, in some current energy storage devices, there is a lot of energy waste in the process of storing and releasing energy, and the energy utilization rate is low.

Images