Water-in-glass evacuated tube solar water heaters

G. L. Morrison*, I. Budihardjo, M. Behnia

*Corresponding author for this work

Research output: Contribution to journalArticle

161 Citations (Scopus)

Abstract

Evacuated tube solar collectors have better performance than flat-plate solar collectors, in particular for high temperature operations. A number of heat extraction methods from all-glass evacuated tubes have been developed and the water-in-glass concept has been found to be the most successful due to its simplicity and low manufacturing cost. In this paper, the performance of a water-in-glass evacuated tube solar pre-heater is investigated using the International Standard test method ISO 9459-2 for a range of locations. Factors influencing the operation of water-in-glass collector tubes are discussed and a numerical study of water circulation through long single-ended thermosyphon tubes is presented. Preliminary numerical simulations have shown the existence of inactive region near the sealed end of the tube which might influence the performance of the collector.

Original languageEnglish
Pages (from-to)135-140
Number of pages6
JournalSolar Energy
Volume76
Issue number1-3
DOIs
Publication statusPublished - Jan 2004
Externally publishedYes

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