Composite heat source flexible clean heat supply method and system based on cross-seasonal graded heat storage

Abstract

The invention discloses a composite heat source flexible clean heat supply method and system based on cross-seasonal graded heat storage, and the system consists of a soil source graded heat storage system, a solar system, an ultra-efficient heat pump, an indoor tail end and a pipeline system, and the soil source graded heat storage system is divided into an inner ring high-temperature area, a middle ring medium-temperature area and an outer ring low-temperature area; in the non-heating period, high-temperature, medium-temperature and low-temperature waste heat sources from industrial enterprises can be received for heat storage, and solar energy can store heat in a medium-temperature area. In the heating period, high-temperature area heat storage and a high-temperature waste heat source can be combined to heat the indoor high-temperature tail end; the medium-temperature area heat storage and the medium-temperature waste heat source can be combined for heating the medium-temperature tail end; the low-temperature area heat storage and the low-temperature waste heat source can be combined for heating the low-temperature tail end; the heat pump unit can absorb heat stored in a low-temperature area and a low-temperature waste heat source for heating and supply heat to the high-temperature tail end and the medium-temperature tail end. Solar energy can directly heat the medium-temperature tail end. According to the invention, cross-seasonal heat supply of clean energy based on industrial waste heat and solar energy can be realized, and energy can be saved by more than 80%-90% compared with a traditional heat supply mode.

Description

technical field [0001] This patent relates to a method and system for flexible and clean heating of composite heat sources based on cross-seasonal graded heat storage, and belongs to the technical field of dual-carbon clean heating. Background technique [0002] Making full use of all kinds of waste heat resources of high-energy-consuming industrial enterprises, as well as natural energy such as solar energy and geothermal energy, has become one of the main alternatives to greatly reduce fossil energy heating. [0003] According to relevant studies and reports, the main sources of waste heat resources and their scales are estimated as follows. [0004] Waste heat from nuclear power: my country will build 200 million kW of nuclear power in the eastern coastal areas in the future, of which at least 100 million kW will be built in the northern coastal areas from Lianyungang to Dalian. The power generation is expected to be 750-800 billion kWh. Calculated according to the heat...

AI Technical Summary

Problems solved by technology

Whether such a large amount of higher-grade energy can be used for heating in winter has always been an unresolved issue. The key issue is to solve the problem of large-scale energy storage across seasons. Among them, the most prominent issues are suitable energy storage media and Effective reduction of system initial investment and operating costs

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