The Library
Performance of evacuated flat plate solar thermal collectors
Tools
Moss, Roger W., Shire, Stan, Henshall, Paul, Arya, Farid, Eames, Philip and Hyde, Trevor (2018) Performance of evacuated flat plate solar thermal collectors. Thermal Science and Engineering Progress, 8 . pp. 296-306. doi:10.1016/j.tsep.2018.09.003 ISSN 2451-9049.
|
PDF
WRAP-performance-evacuated-flat-plate-solar-thermal-collectors-Moss-2018.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (6Mb) | Preview |
|
PDF
Performance of evacuated flat solar thermal collectors v10.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only - Requires a PDF viewer. Download (2046Kb) |
Official URL: https://doi.org/10.1016/j.tsep.2018.09.003
Abstract
Heat losses from a flat panel solar collector can be significantly reduced by lowering the internal pressure to <0.5 Pa. Compared with conventional collectors, the resulting increase in efficiency is predicted to give a significant gain in annual heat output in the context of a temperate climate with low median irradiance.
Two experimental collectors were built and tested to investigate theoretical aspects of evacuated flat plates and develop appropriate technological solutions. One had a metal tray to the rear, the other used two sheets of glass. An array of pillars supports the glass against atmospheric pressure. The experimental procedure was designed to minimise measurement uncertainty. Testing under a solar simulator, with and without a vacuum, showed a sudden drop in heat loss as the pressure was reduced below 0.5 Pa. When evacuated the heat loss coefficient fell from 7.43 to 3.65 W/m2 K and the efficiency at a nominal test condition of ΔT = 60 °C, G = 1000 W/m2 increased from 36% to 56%. Heat losses from absorber to glass were within 9% of the predicted level. This demonstrates that the heat loss mechanism is well understood.
Item Type: | Journal Article | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||||
Library of Congress Subject Headings (LCSH): | Solar collectors, Plates (Engineering) -- Thermal properties | ||||||||||||
Journal or Publication Title: | Thermal Science and Engineering Progress | ||||||||||||
Publisher: | Elsevier BV | ||||||||||||
ISSN: | 2451-9049 | ||||||||||||
Official Date: | December 2018 | ||||||||||||
Dates: |
|
||||||||||||
Volume: | 8 | ||||||||||||
Page Range: | pp. 296-306 | ||||||||||||
DOI: | 10.1016/j.tsep.2018.09.003 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Date of first compliant deposit: | 2 October 2018 | ||||||||||||
Date of first compliant Open Access: | 2 October 2018 | ||||||||||||
RIOXX Funder/Project Grant: |
|
||||||||||||
Conference Paper Type: | Paper | ||||||||||||
Type of Event: | Conference | ||||||||||||
Related URLs: |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year