Prof. Lang Liu Profile

Prof. Lang Liu

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 13 May 2024 Paper

Study on heat storage and heat release performance of casing heat pipe heat exchanger coupled phase change backfill body

Changfa Ji, Pengju Zhang, Xueli Wang, Yan Du, Lang Liu, Bo Zhang, Chao Huan

Proceedings Volume 13159, 131594B (2024) https://doi.org/10.1117/12.3024325

KEYWORDS: Mining, Resistance, Numerical simulations, Energy efficiency, Clouds, Geothermal energy

Read Abstract +

In order to improve the utilization of mine geothermal resource, the casing heat pipe heat exchanger coupled phase change backfill heat transfer system is proposed in this paper. The effects of the number of Casing Heat Pipe Heat Exchanger (CHPHE) on the system temperature distribution, the liquid phase fraction of Phase Change Material (PCM) and the heat storage/heat release performance of system were studied by numerical simulation. The results showed that with increase in CHPHE number, the internal temperature of backfill body increases slowly, and the melting rate of PCM slows down. In the heat storage/heat release coexistence stage, the temperature of backfill body decreases rapidly, and the solidification rate of PCM inside the casing heat exchanger accelerates. When CHPHE number is two, three, and four, the complete melting time of PCM is 2.25 h, 3.16 h and 3.33 h, and the complete solidification time is 1.06 h, 1.20 h and 1.24 h respectively. As CHPHE number increases from two to four, temperature difference between the inlet and outlet CHPHE cooling water during heat storage/heat release coexistence stage decreases from 3.63 °C to 1.63 °C. When CHPHE number increases from two to four, the total heat storage capacity increases from 3320.61 kJ to 3757.88 kJ, and the growth rate is 7.14%. While the heat release capacity increases from 2881.06 kJ to 3110.97 kJ, and the growth rate is 7.98%. However, the more CHPHE number, the greater the thermal interference between heat pipe heat exchangers, and the smaller system energy efficiency coefficient - The energy efficiency coefficient of CHPHE-PCB system will reduce from 86.76% to 82.77% (a reduction of 3.99%) as CHPHE number increases from two to four. The research results obtained in this study can guild the highly efficient exploitation of my geothermal energy.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years