Use this URL to cite or link to this record in EThOS:
Title: Passive solar energy : modifications of existing masonry walls to improve thermal performance
Author: Boyle, P. M.
ISNI:       0000 0001 3474 2174
Awarding Body: University of Leeds
Current Institution: University of Leeds
Date of Award: 1986
Availability of Full Text:
Access from EThOS:
Access from Institution:
Existing brick walls usually have a high U value, one method of improvement is by insulation, but if the wall faces approximately south, it is possible that greater benefits could be obtained by improving the wall's performance as a solar collector. Three solid 225 mm walls were constructed: one glazed, one unglazed, and (since glazing prevents rain penetration) one waterproofed unglazed wall. Two glazed cavity walls were also constructed one glazed with a fan to recover heat from the cavity by forced convection, and one unglazed, with no fan. These walls gave small heat gains. The walls behind the glazing were then insulated on their outer faces, and warm air collected by natural convection. Such a collector was built using a selective surface, a maximum efficiency of about 50% was observed. A theoretical model was developed based on simple steady state theory, this was found to correlate well with experimental data. The theory could be used for any system of low thermal storage, including forced flow collectors. Finally these walls, and others, are compared and their relative merits discussed.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Solar energy