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Author:

Huang, Shuai (Huang, Shuai.) | Li, Jiqin (Li, Jiqin.) | Bai, Ze (Bai, Ze.) | Dong, Jiankai (Dong, Jiankai.)

Indexed by:

EI Scopus SCIE

Abstract:

Heat storage is a critical measure to realize the utilization of waste heat and to enhance the heating capacity of the medium -deep U -type borehole heat exchanger (MDUBHE) system. However, the effects of heat storage on the operation of the MDUBHE system remain unclear. The effects of heat storage measures on the building and the environment have not been assessed. In this paper, the effects of heat storage measures on system performance are revealed and assessed using the numerical heat transfer model. The results show that heat storage measures are particularly necessary in severe cold regions of China. The minimum value of the storage inlet temperature in this study should be more than 42.25 C-degrees, and the flow rate is recommended at no more than 15 kg/s. Although increasing the inlet temperature of heat storage enhances the MDUBHE system's heating performance, the storage system's energy and exergy efficiencies are attenuated. Heat is mainly stored in the underground region within 6 m from the MDUBHE and at a depth of up to 2000 m, and the shape of the thermal plume is an inverted funnel. After adopting heat storage measures, the heating area supplied to buildings by the MDUBHE system increases, and reduces environmental pollution. Compared with the no heat storage measure, the heating area of the MDUBHE system is increased by 6770 m(2) when the storage inlet temperature is 80(degrees) C, and the corresponding solar collector area needs to be 756.1 m(2). When T-in(s) increases from 45 C to 80(degrees) C, the reduction of CO2 emissions increases by 12.43 tons, 21.05 tons, 38.26 tons, 55.41 tons, and 72.50 tons, respectively. This study could promote the application of the MDUBHE system and the heat storage system in severe cold regions.

Keyword:

MDUBHE Efficiency Heating performance Geothermal energy Heat storage

Author Community:

  • [ 1 ] [Huang, Shuai]Harbin Inst Technol, Sch Architecture, Harbin 150090, Peoples R China
  • [ 2 ] [Li, Jiqin]Harbin Inst Technol, Sch Architecture, Harbin 150090, Peoples R China
  • [ 3 ] [Dong, Jiankai]Harbin Inst Technol, Sch Architecture, Harbin 150090, Peoples R China
  • [ 4 ] [Huang, Shuai]Minist Ind & Informat Technol, Key Lab Cold Reg Urban & Rural Human Settlement En, Harbin 150090, Peoples R China
  • [ 5 ] [Li, Jiqin]Minist Ind & Informat Technol, Key Lab Cold Reg Urban & Rural Human Settlement En, Harbin 150090, Peoples R China
  • [ 6 ] [Dong, Jiankai]Minist Ind & Informat Technol, Key Lab Cold Reg Urban & Rural Human Settlement En, Harbin 150090, Peoples R China
  • [ 7 ] [Bai, Ze]Beijing Univ Technol, Inst Civil & Architectural Engn, Beijing 100124, Peoples R China
  • [ 8 ] [Bai, Ze]Jilin Jianzhu Univ, Sch Municipal & Environm Engn, Changchun 130118, Peoples R China

Reprint Author's Address:

  • [Dong, Jiankai]Harbin Inst Technol, Sch Architecture, Harbin 150090, Peoples R China

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Source :

JOURNAL OF CLEANER PRODUCTION

ISSN: 0959-6526

Year: 2024

Volume: 447

1 1 . 1 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 13

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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