Abstract
A comparative experiment was conducted to investigate the effects of heat storage of graphite on flow boiling heat transfer characteristics in solar receiver. Improvement of thermal performance of receiver was verified by the outlet temperature and the isothermal performance of receiver by setting a four-stage heating process with different heat flux.The effects of thermal energy storage of graphite on flow instability and heat transfer were analyzed. Results showed that the thermal energy storage of graphite resulted in a time prolongation of outlet temperature decline by 30.0% when a sudden drop of solar radiation (or heat flux) happened. Heat storage of graphite improved the isothermality of receiver in both radius and axis direction. The isothermality improvement effectively restrained the flow boiling instabilities in receiver for the case of higher heat flux condition. A heat transfer coefficient enhancement by was obtained 7.23%.
| Original language | English |
|---|---|
| Pages (from-to) | 2087-2093 |
| Number of pages | 7 |
| Journal | Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) |
| Volume | 50 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1 Nov 2016 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2016, Zhejiang University Press. All right reserved.
Keywords
- Flow boiling
- Instability
- Receiver
- Solar heat storage
ASJC Scopus subject areas
- General Engineering
