Detail publikace
Numerical Study on Heat Transfer and Performance of Seasonal Borehole Thermal Energy Storage
Shen, Haixiao Cao, Zhen Klemes, Jiri Jaromir Wang, Jin Wang, Enyu
Anglický název
Numerical Study on Heat Transfer and Performance of Seasonal Borehole Thermal Energy Storage
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
Design of the borehole thermal energy storage (BTES) is very important for the seasonal solar thermal storage system. The BTES designed based on the empirical method could lead to some unsatisfied effects in actual operations. This paper simulated the BTES operation in one year to study the effects of soil thermal conductivity, soil volume-specific heat, initial soil temperature and relative surface area of storage on energy efficiency of the BTES. The results show that energy efficiency of the BTES reaches the maximum when soil thermal conductivity is 1.8 W/(m center dot K). According to the results, soil thermal conductivity has more significant effects on the heat extraction per soil volume but has the most negligible impact on energy efficiency of the BTES. At the same time, relative surface area of storage is the most influential factor on energy efficiency of the BTES. Finally, a new BTES design method was proposed which is suitable for the studied parameter range. It is worth noting that the present study focuses on the continuous operation of the system and fixed buried pipe spacing, while the intermittent operation and other buried pipe spacing will be studied in future work.
Anglický abstrakt
Design of the borehole thermal energy storage (BTES) is very important for the seasonal solar thermal storage system. The BTES designed based on the empirical method could lead to some unsatisfied effects in actual operations. This paper simulated the BTES operation in one year to study the effects of soil thermal conductivity, soil volume-specific heat, initial soil temperature and relative surface area of storage on energy efficiency of the BTES. The results show that energy efficiency of the BTES reaches the maximum when soil thermal conductivity is 1.8 W/(m center dot K). According to the results, soil thermal conductivity has more significant effects on the heat extraction per soil volume but has the most negligible impact on energy efficiency of the BTES. At the same time, relative surface area of storage is the most influential factor on energy efficiency of the BTES. Finally, a new BTES design method was proposed which is suitable for the studied parameter range. It is worth noting that the present study focuses on the continuous operation of the system and fixed buried pipe spacing, while the intermittent operation and other buried pipe spacing will be studied in future work.
Klíčová slova anglicky
Boreholes; Heat storage; Heat transfer; Soil temperature; Soils; Specific heat; Thermal conductivity; Thermal energy
Vydáno
16.12.2023
Nakladatel
TAYLOR & FRANCIS INC530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106
Místo
TAYLOR & FRANCIS INC530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106
ISSN
0145-7632
Ročník
21
Číslo
44
Strany od–do
2027–2039
Počet stran
13
BIBTEX
@article{BUT187672,
author="Jiří {Klemeš} and Jin {Wang},
title="Numerical Study on Heat Transfer and Performance of Seasonal Borehole Thermal Energy Storage",
year="2023",
volume="21",
number="44",
month="December",
pages="2027--2039",
publisher="TAYLOR & FRANCIS INC530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106",
address="TAYLOR & FRANCIS INC530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106",
issn="0145-7632"
}