Bibliographic Details
| Title: |
Heat exchange pipe spacing for optimal temperature uniformity on cold radiant ceiling surfaces. |
| Authors: |
Ye, Lifei1 (AUTHOR), Ding, Yunfei1,2 (AUTHOR) dingyf@126.com, Zhou, Chonggang1 (AUTHOR), Li, Jiangbo1 (AUTHOR) |
| Source: |
Energy & Buildings. Mar2023, Vol. 282, pN.PAG-N.PAG. 1p. |
| Subject Terms: |
*HEAT pipes, *HEAT radiation & absorption, *COLD (Temperature), *HEAT transfer, *TEMPERATURE distribution |
| Abstract: |
• A method to improve the performance of cold radiation ceiling is proposed. • Cold radiation ceiling temperature uniformity is improved. • Cold radiating panels in series with variable pipe spacing can reduce surface temperature. • Cost and pressure drop comparison of different cooling modules are analyzed. Radiant cooling systems have great potential for comfort and energy savings, but uneven surface temperature distributions and the risk of condensation restrict their use in engineering applications. In this study, a cold radiant panel heat transfer model was established and experimentally verified. Radiant panels with 3 heat transfer pipe spacings were designed and used in 7 tandem combination modules with variable pipe spacing (VPS) that were compared with 3 conventional cold radiant panel tandem combination modules with equal pipe spacing (EPS). Compared to the EPS modules, the overall heat transfer performance of the VPS modules was better, the surface temperature distribution was more uniform, and the average surface temperature was lower for different values of the operating parameters such as the water supply flow rate and supply and return water temperature difference. Additionally, the values of the temperature nonuniform coefficient (TNC) and surface average temperature were lower for the VPS than the EPS modules. Although the method of combining cold radiant panels with different heat transfer pipe spacings in series to form a cooling module improves the overall heat transfer performance, the balance of cost and heat transfer performance improvement should be considered in practical applications. [ABSTRACT FROM AUTHOR] |
|
Copyright of Energy & Buildings is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Complete |
