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Development of solar collectors mounted on roofs of steel; Udvikling af staaltags-solfanger

Technical Report:

Abstract

The possibilities of using solar energy in connection with the renovation of roofs where steel units are laid on top of older asbestos cement sheets are investigated. Three prototypes of suitable solar collector designs are examined, and their capacities are compared with types of a more traditional design. Results showed that the capacity of collectors of a quite simple, newer, design compared well with that of traditional models when the absorbers of the former are integrated in the roof construction. This is because heat transfer from the steel roof lying under the collector reduces heat loss. It is difficult to achieve an acceptable temperature for domestic water heating based only on heat exchange between the warm air under the roof and a circulating fluid, where there is a a roof plate instead of a transparent covering over the absorber. At lower temperatures, for example in the case of heating systems for swimming pools, this design could be considered suitable. The solar collector will than be camouflaged and the absorber will be integrated as part of the roof surface. The suggested construction is aesthetically attractive, especially when compared to solar collectors mounted on top of the roof, and it is also  More>>
Publication Date:
Sep 01, 1994
Product Type:
Technical Report
Report Number:
NEI-DK-1735
Reference Number:
SCA: 141000; PA: DK-94:001730; EDB-95:013285; SN: 95001301466
Resource Relation:
Other Information: PBD: Sep 1994
Subject:
14 SOLAR ENERGY; SOLAR COLLECTORS; DESIGN; ROOFS; COST; AESTHETICS; CAPACITY; RETROFITTING; HEAT LOSSES; STEELS; BUILDING MATERIALS; ASBESTOS; SOLAR ARCHITECTURE; 141000; SOLAR COLLECTORS AND CONCENTRATORS
OSTI ID:
10105243
Research Organizations:
Dansk Teknologisk Inst., Taastrup (Denmark). Proevestationen for Solenergi
Country of Origin:
Denmark
Language:
Danish;Swedish
Other Identifying Numbers:
Other: ON: DE95723833; CNN: Contract ENS-51181-93.0054; TRN: DK9401730
Availability:
OSTI; NTIS
Submitting Site:
DK
Size:
29 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Mikkelsen, P, and Katic, I. Development of solar collectors mounted on roofs of steel; Udvikling af staaltags-solfanger. Denmark: N. p., 1994. Web.
Mikkelsen, P, & Katic, I. Development of solar collectors mounted on roofs of steel; Udvikling af staaltags-solfanger. Denmark.
Mikkelsen, P, and Katic, I. 1994. "Development of solar collectors mounted on roofs of steel; Udvikling af staaltags-solfanger." Denmark.
@misc{etde_10105243,
title = {Development of solar collectors mounted on roofs of steel; Udvikling af staaltags-solfanger}
author = {Mikkelsen, P, and Katic, I}
abstractNote = {The possibilities of using solar energy in connection with the renovation of roofs where steel units are laid on top of older asbestos cement sheets are investigated. Three prototypes of suitable solar collector designs are examined, and their capacities are compared with types of a more traditional design. Results showed that the capacity of collectors of a quite simple, newer, design compared well with that of traditional models when the absorbers of the former are integrated in the roof construction. This is because heat transfer from the steel roof lying under the collector reduces heat loss. It is difficult to achieve an acceptable temperature for domestic water heating based only on heat exchange between the warm air under the roof and a circulating fluid, where there is a a roof plate instead of a transparent covering over the absorber. At lower temperatures, for example in the case of heating systems for swimming pools, this design could be considered suitable. The solar collector will than be camouflaged and the absorber will be integrated as part of the roof surface. The suggested construction is aesthetically attractive, especially when compared to solar collectors mounted on top of the roof, and it is also cheaper than those of traditional design. It is concluded that this type of solar collector has good potentials for use in connection with roof renovation. (AB)}
place = {Denmark}
year = {1994}
month = {Sep}
}