A combined cooling, heating and power supply device and method for supplying heat in summer and cooling in winter

Abstract

The embodiment of the present invention discloses a combined cooling, heating and power supply device and method for supplying heat in summer and cold in winter, including a multi-stage air compression system, a solar phase change thermal storage system, an air liquefaction system and an expander combined cooling, heating and power supply system. The embodiment of the present invention provides a combined cooling, heating and power supply device and method for supplying heat in summer and cold in winter, and its method is based on liquid air energy storage technology. It utilizes low-priced low-cost electricity and waste electricity in power stations to provide compressed air, and the compressed air passes through during peak power consumption. The expander generates power, and the exhaust gas is used as a cold source / heat source to realize heating in winter and cooling in summer; at the same time, a solar phase change heat storage system is used to collect waste heat from the compressor and solar energy, which not only heats the working fluid to improve system efficiency, but also serves as a heat source for external supply hot water.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a device and method for combined cooling, heating, and electricity for supplying heat in summer and cooling in winter. Background technique [0002] Cooling, heating and electricity are the most basic living needs of people. Typically, cooling and heating are also powered by electricity. For a long time, in order to meet the requirements of electric load, the power sector has to build power generation capacity according to the maximum load requirement. On the one hand, this has caused a large amount of surplus and waste of power generation capacity. On the other hand, the power sector has to often limit power consumption during peak hours of power consumption. Especially in recent years, the number of large units in my country's power grid has been increasing, the power regulation capacity of the power system itself has been limited, and the peak-to-valley ratio of the s...

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Problems solved by technology

[0005] In the embodiment of the present invention, a combined cooling, heating and power supply device and method are provided to solve the problem that in the prior art, when the compressor compresses the air, the compression heat is wasted and cannot be utilized, and the compressed air can only be used for Power generation cannot be flexibly applied to distributed energy systems

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