The effect of condenser heat transfer on the energy performance of a plate heat pipe solar collector

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Facao, J (Author) Other; Armando C. Oliveira (Author) FEUP

Journal

Title: International Journal of Energy Research

Vol. 29

Pages: 903-912

ISSN: 0363-907X

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 3 Citations

ISI Web of Science

Scopus - 3 Citations

Other information

Authenticus ID: P-000-23X

DOI: 10.1002/er.1114

Abstract (EN): For a novel prototype solar collector, using a plate heat pipe, condenser heat transfer was analysed in detail. The condenser has the shape of a rectangular channel. Flow and heat transfer of water in the rectangular channel was modelled and the heat transfer coefficient assessed, using the Fluent code. Under typical operating conditions a mixed convection situation occurs. The channel is inclined and heating is through one wall only (upper channel surface). The range of temperature differences considered was similar to the one verified under real operating conditions, covering a wide range of Grashof numbers. Results showed that the Nusselt number is significantly higher than the one for forced convection in a rectangular channel with fully developed boundary layers. In order to enhance heat transfer, a modification to the rectangular channel was analysed, using baffles to improve flow distribution and increase velocity. The effect of this modification on collector energy performance (efficiency) was assessed. Copyright (c) 2005 John Wiley & Sons, Ltd.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10