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CN-122015170-A - Cross-season energy storage data center waste heat grade lifting coupling heat supply system and method

CN122015170ACN 122015170 ACN122015170 ACN 122015170ACN-122015170-A

Abstract

The application discloses a cross-season energy storage data center waste heat grade lifting coupling heat supply system which comprises a data center cooling and waste heat recovery subsystem, a waste heat collection and intelligent distribution subsystem, an active underground cross-season energy storage body, a coupling type ground source heat pump heat supply subsystem and an intelligent cooperative control system, wherein all the subsystems work cooperatively to realize recovery, storage, grade lifting and building heating of the data center waste heat. The method aims at carrying out large-scale storage and grade improvement on low-temperature waste heat rich in summer and transitional seasons through a controlled and actively managed underground cross-season energy storage body, and taking the low-temperature waste heat as a stable medium-temperature heat source in winter to supply the low-temperature waste heat to a coupled ground source heat pump system, so that the low-temperature waste heat is finally and efficiently and reliably converted into building heating heat, and the maximum cascade utilization of energy sources is realized.

Inventors

  • NIE YANXIA
  • LIU WEIWEI
  • LIU YU
  • ZHAO XIAOBIN
  • SONG YINHAO
  • Guan Jianyuan

Assignees

  • 中建一局集团建设发展有限公司

Dates

Publication Date
20260512
Application Date
20260212

Claims (10)

  1. 1. The utility model provides a cross-season energy storage's data center waste heat grade promotes coupling heating system which characterized in that includes: the data center cooling and waste heat recovery subsystem is used for collecting low-temperature waste heat generated by the IT equipment of the data center and outputting cooling backwater at 30-45 ℃; the waste heat collecting and intelligent distributing subsystem is used as a heat conveying and distributing pivot and is used for guiding the low-temperature waste heat to the energy storage body in a non-heating season and to the ground source heat pump when necessary; the active underground cross-season energy storage body consists of vertical deep U-shaped buried pipe groups arranged in a matrix and is divided into a core heat storage area and a peripheral buffer area, wherein the core heat storage area is used for storing waste heat in a high density mode, the peripheral buffer area is used for heat isolation and heat balance adjustment, and a distributed optical fiber temperature sensor network is embedded in the energy storage body to monitor an underground three-dimensional soil temperature field; The coupled ground source heat pump heat supply subsystem comprises a double source heat taking loop which is respectively connected to a core heat storage area of the active underground cross-season energy storage body and a data center real-time cooling loop to form a double source supply mode of a main heat source and an auxiliary heat source for heating a building; And the intelligent cooperative control system dynamically controls the heat flow direction of the waste heat collection and intelligent distribution subsystem and the heat source switching proportion of the coupled ground source heat pump heat supply subsystem based on the three-dimensional soil temperature field data, the building load prediction data, the meteorological data and the electricity price signal, so that the seasonal storage, the grade improvement and the efficient heat supply of the waste heat are realized.
  2. 2. The system of claim 1, wherein the data center cooling and waste heat recovery subsystem comprises a water-cooled air conditioner end and a primary side circulation pipeline, the water-cooled air conditioner end is arranged in a manner of being attached to IT equipment, and a heat preservation material is wrapped outside the primary side circulation pipeline.
  3. 3. The system of claim 1, wherein the waste heat collection and intelligent distribution subsystem comprises a circulation loop filled with an anti-freezing working medium and an intelligent multi-way valve group, the anti-freezing working medium is an environment-friendly low-temperature anti-freezing medium, the response time of the intelligent multi-way valve group is less than or equal to 1 second, and the control precision is +/-1%.
  4. 4. The system of claim 1, wherein the core heat storage area has a buried pipe spacing of 3-5 m, the peripheral buffer area has a buried pipe spacing of 8-12 m, and the distributed optical fiber temperature sensor network has a measurement accuracy of 0.5 ℃ or more, so as to realize full coverage monitoring of an underground three-dimensional soil temperature field.
  5. 5. The system of claim 1, wherein the coupled ground source heat pump heating subsystem further comprises a heat pump unit and a building side heating circulation system, the building side heating circulation system adopts a ground heating or radiator radiating mode, and a heating COP value of the heat pump unit is more than or equal to 4.5 under standard working conditions.
  6. 6. The system of claim 1, wherein the control strategy implemented by the intelligent coordinated control system comprises a seasonal charging and grade lifting strategy, a zoned thermal management strategy, a dual source adaptive switching and energy efficiency optimization strategy.
  7. 7. The system of claim 6, wherein the seasonal heat charging and grade elevation strategy utilizes soil thermal inertia to raise the temperature of the winter extracted waste heat above the average summer injection temperature by controlling heat injection flow rate and cycle, and wherein the zoned thermal management strategy directs heat to a buffer zone for temporary storage when the summer core temperature approaches an upper limit, and preferentially extracts heat from the core in winter.
  8. 8. A method of heating based on the system of any one of claims 1-7, comprising the steps of: S1, in a non-heating season, cooling backwater generated by a data center cooling and waste heat recovery subsystem transfers heat to a circulating working medium of a waste heat collecting and intelligent distributing subsystem, the circulating working medium is heated and then is conveyed to a core heat storage area of an active underground cross-season energy storage body, and heat storage is realized through heat exchange between a buried pipe and soil; S2, in winter, the intelligent cooperative control system switches an operation mode, a coupled ground source heat pump heat supply subsystem is started, heat is preferentially extracted from a core heat storage area to supply heat for a building, and meanwhile real-time waste heat of a data center is adaptively introduced as an auxiliary heat source according to heat source temperature and building load.
  9. 9. The method of claim 8, wherein in step S1, the intelligent cooperative control system controls the heat injection flow rate to be 0.8-1.2m/S, and the heat injection period covers the whole non-heating season.
  10. 10. The method according to claim 8, wherein in step S2, when the temperature of the core heat storage area is lower than 40-42 ℃ or the building load exceeds 105% -110% of the rated heating capacity of the heat pump, the introduction proportion of the real-time waste heat of the data center is increased, so as to ensure that the inlet temperature of the ground source heat pump is maintained above 35 ℃.

Description

Cross-season energy storage data center waste heat grade lifting coupling heat supply system and method Technical Field The invention belongs to the technical field of comprehensive utilization of energy and coupling of renewable energy, and particularly relates to a system and an integrated operation method for providing efficient and stable heating for matched buildings by carrying out seasonal storage and grade improvement through an actively managed underground cross-season energy storage body aiming at continuous low-temperature waste heat of a data center and creatively coupling with a ground source heat pump system. Background With the rapid development of digital economy such as cloud computing and artificial intelligence, the scale and energy consumption of data centers continue to rise. When the data center operates, a large amount of low-temperature waste heat is generated by IT equipment, and the waste heat is usually in the form of cooling backwater at 30-45 ℃. Traditional heat dissipation schemes typically remove these waste heat directly to the atmosphere through a cooling tower or a dry cooler, resulting in significant energy waste, while exacerbating the urban heat island effect. Meanwhile, office and living buildings matched with the data center have continuous heating demands in winter. The ground source heat pump is used as a high-efficiency heating technology, the energy efficiency ratio (COP) of the ground source heat pump is obviously influenced by the temperature of a ground heat source, and the higher the temperature of the heat source is, the better the operation efficiency and economy are. The prior art attempts to directly use the waste heat of a data center for district heating at present, but has the following core defects: The problem of space-time mismatch is remarkable, namely, the heat production of the data center is continuously stable throughout the year, the heat load of the building shows remarkable seasonal fluctuation, so that a large amount of waste heat in summer cannot be utilized, and the dilemma of insufficient heat supply capacity is possibly faced in winter; The heat grade is not matched with the system efficiency, namely the temperature of the waste heat of the data center is generally lower than the temperature required by conventional heating, the direct utilization efficiency is low, and if the heat pump is forcibly matched, the compression ratio of the heat pump is required to be greatly improved, so that the economy is poor; And if the waste heat is injected into the buried pipe area in a disordered way throughout the year, the heat accumulation of the soil can be caused, so that the refrigeration efficiency of the ground source heat pump in summer can be reduced, the heat balance of the soil in long-term operation can be destroyed, and the service life and the stability of the system are seriously influenced. Therefore, an innovative technical solution capable of simultaneously solving the above-mentioned space-time mismatch, low heat grade utilization efficiency and negative effects of geothermal systems is needed to realize efficient and sustainable utilization of waste heat of a data center. Disclosure of Invention The embodiment of the specification provides a cross-season energy storage data center waste heat grade lifting coupling heat supply system and a cross-season energy storage data center waste heat grade lifting coupling heat supply method, which are used for solving the problems of space-time mismatch, low heat grade utilization efficiency, negative influence on a geothermal system and the like existing in the waste heat utilization of a data center in the prior art. The core purpose of the scheme is to store and upgrade the low-temperature waste heat rich in summer and transitional seasons in a large scale through a controlled and actively managed underground cross-season energy storage body, and supply the low-temperature waste heat as a stable medium-temperature heat source to a coupled ground source heat pump system in winter, so that the low-temperature waste heat is finally and efficiently and reliably converted into building heating heat, and the maximum cascade utilization of energy sources is realized. The technical scheme provided by the embodiment of the specification is as follows: in a first aspect, an embodiment of the present application provides a cross-season energy storage data center waste heat grade improving and coupling heat supply system, which is characterized by comprising a data center cooling and waste heat recovery subsystem, a waste heat collecting and intelligent distribution subsystem, an active underground cross-season energy storage body, a coupling type ground source heat pump heat supply subsystem and an intelligent cooperative control system, wherein the subsystems cooperatively realize recovery, storage, grade improvement and building heating of the data center waste heat. The data center cooling and wa