Two-loop three-level closed circulation region energy station system

Abstract

Disclosed is a two-loop three-level closed circulation region energy station system. The whole system is closed-type water circulation. Cold / hot energy is offered to a user through a hot source water loop and a cold source water loop. The hot source water loop offers heat quantity to the user. The cold source water loop offers cold quantity to the user. According to the system, the energy collection, transferring, usage and discarding processes are completed through the primary water circulation, the secondary water circulation and the tertiary water circulation. The primary circulation is also called as hot source station circulation which is used for bringing the external energy such as terrestrial heat, solar energy and industrial and civil waste heat into the system, and excessive heat quantity in the system is released to stratum soil. The secondary circulation is also called as mediate transferring circulation which is used for transferring energy of a hot source station to the user or transferring energy discarded by the user to other users or to a terrestrial heat source station. The tertiary circulation is also called as user circulation which is used for transferring the energy of the system to energy dissipation points of the user, and receiving the energy discarded by the user to the system at the same time.

Description

Technical field: [0001] The invention relates to a low-carbon regional centralized energy supply facility and method. Background technique: [0002] Regional centralized energy supply is an economical, efficient and environmentally friendly energy supply method. It is an inevitable trend of infrastructure construction in the future urban development process. The current regional centralized energy supply methods include steam or hot water regional central heating systems, single-circuit Single-stage or double-stage open cycle area centralized energy station system, single-loop single-stage or double-stage closed cycle area centralized energy station system. [0003] The energy of steam or hot water regional central heating system comes from centralized boiler room or thermal power plant, and supplies steam or hot water to users with branched or annular pipe network. The disadvantages are: single heat source point, poor heating safety; single heat medium , the parameters of ...

AI Technical Summary

Problems solved by technology

[0003] The energy of steam or hot water regional central heating system comes from centralized boiler room or thermal power plant, and supplies steam or hot water to users with branched or annular pipe network. The disadvantages are: single heat source point, poor heating safety; single heat medium , the parameters of the heat medium are fixed, which cannot meet the requirements of different customers for energy diversity; the energy is obtained by burning coal or gas, the thermal efficiency is very low, and it is not a clean energy; the high-temperature pipe network has a large heat loss; the system operation and maintenance costs are high; The comprehensive cost of energy is high, and the burden on users is heavy

[0004] Single-loop single-stage or double-stage open circulation regional centralized energy station system energy comes from surface water or groundwater, the system obtains or releases energy from surface water or groundwater through water circulation, surface water is directly extracted and returned from the water body, groundwater passes through Pumping well-refilling well circulation method, the system adopts single-loop circulation, and uses the same medium for heating and cooling. The disadvantage is that it needs underground or surface water sources that can be collected and used, but both groundwater and surface water will change with the seasons , the government’s policy on pumping groundwater and surface water may also change at any time, and the security of energy supply is poor; the heat source is single, and as the service life increases, underground pumping wells and recharge wells may become worse and worse or even fail. It may be dry or polluted; the heat medium is single, and the same medium is used for heating and cooling. Dirt and fouling, high requirements for system cleaning, short service life of equipment; inflexible system adjustment when load changes, high operating costs; high comprehensive energy costs, heavy burden on users

[0005] The energy of single-loop single-stage or double-stage closed-loop regional centralized energy station system comes from the soil of the stratum. The system obtains or releases energy from the stratum through water circulation. It adopts a single-loop cycle and uses the same medium for heating and cooling. The disadvantages are: : single heat source point, poor security of energy supply; single heat medium, using the same medium for heating and cooling, unavoidable cold and heat conflicts, and reduced heat exchange efficiency; it is not easy to incorporate waste heat sources and solar energy into the system; when the load changes , the system adjustment is inflexible, and the operating cost is high; the comprehensive cost of energy is high, and the user burden is heavy

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