Cold, heat, steam, and power combined supply comprehensive energy system

Abstract

The invention relates to the technical fields of energy storage and energy supply techniques, and provides a cold, heat, steam, and power combined supply comprehensive energy system, which comprises an energy storage and power generation module and a cold, heat, and steam combined supply module, wherein the energy storage and power generation module comprises an air compressor set, a first heat exchanger, a regenerator, a throttling element, a cryogenic storage tank, a cryogenic pump, a second heat exchanger, and an air turbine set, which are connected in sequence; and the cold, heat, and steam combined supply module comprises a heat storage module, and a steam supply module, a cold and heat supply module, and a turbine preheating module, which are connected with the heat storage module inparallel respectively. By using the system, the technical problem that, due to the relatively low cycle efficiency and the relatively large initial investment of liquid air energy storage, the benefit is low in an area with an unobvious peak-valley electricity price difference is solved; more diverse energy supply forms and types are excavated on the basis of traditional liquid air energy storage; the economy of an energy storage device can be effectively improved; and therefore, the wide popularization and application of the energy storage device are realized.

Description

technical field [0001] The invention relates to the technical field of energy storage and energy supply, in particular to an integrated energy system for cooling, heating, steam and electricity. Background technique [0002] With the development of global industry, the power consumption of the society is increasing, and the load peak-valley difference of the power grid is also increasing, which brings challenges to the dispatching of the power grid and the stable operation of the power system. The power grid urgently needs energy storage devices to cut peaks and fill valleys, and at the same time assume the role of backup and black start. The large-scale energy storage technologies currently available for grid-level applications are mainly pumped hydro storage, battery energy storage and compressed air energy storage. Pumped hydro storage must be built in a non-cold area with suitable terrain and abundant water sources. Strict geographical conditions restrict its further de...

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Problems solved by technology

[0004] The embodiment of the present invention provides a comprehensive energy system for cooling, heating, steam and electricity to solve the technical problems of low efficiency of liquid air energy storage, large initial investment, and low benefit in areas where the peak-to-valley electricity price difference is not obvious. Realizing more diverse forms and types of energy supply on the basis of traditional liquid air energy storage can effectively improve the economics of energy storage devices, thereby realizing the widespread popularization and application of energy storage devices

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