Numerical Study on Heat Transfer and Performance of Seasonal Borehole Thermal Energy Storage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU150631" target="_blank" >RIV/00216305:26210/23:PU150631 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.tandfonline.com/doi/full/10.1080/01457632.2022.2164687" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/01457632.2022.2164687</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/01457632.2022.2164687" target="_blank" >10.1080/01457632.2022.2164687</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical Study on Heat Transfer and Performance of Seasonal Borehole Thermal Energy Storage

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Numerical Study on Heat Transfer and Performance of Seasonal Borehole Thermal Energy Storage

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/EF15_003%2F0000456" target="_blank" >EF15_003/0000456: Laboratoř integrace procesů pro trvalou udržitelnost</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Heat Transfer Engineering

ISSN

0145-7632

e-ISSN

1521-0537

Svazek periodika

21

Číslo periodika v rámci svazku

44

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

2027-2039

Kód UT WoS článku

000911902100001

EID výsledku v databázi Scopus

2-s2.0-85146247466