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Protecting solar collector systems from corrosion

Abstract

The main cause of the reduced life of a solar heating system is corrosion of the exterior parts and the internal components. This report outlines ways of reducing the cost of solar heating by reducing the corrosion in solar heating systems, and hence increasing the system's service life. Mechanisms for corrosion are discussed: these include galvanic corrosion and crevice corrosion. Means of minimizing corrosion at the design stage are then described. Such methods, when designing the solar collector, involve ensuring proper drainage of exterior water; eliminating situations where moisture, dirt and pollutants may collect; preventing condensation inside the collector; using proper gaskets and sealants at appropriate places; and selecting optimum materials and coatings. Interior corrosion can be minimized at the design stage by choosing a good heat transfer fluid and corrosion inhibitor, in the case of systems where liquids are used; ensuring a low enough flow rate to avoid erosion; designing the system to avoid crevices; and avoiding situations where galvanic corrosion could occur. Other procedures are given for minimizing corrosion in the construction and operation of solar heating systems. 7 figs., 7 tabs.
Publication Date:
Jan 01, 1978
Product Type:
Technical Report
Report Number:
ORF-CORR-1; CE-02185
Reference Number:
CANM-88-004266; ERA-14-010931; EDB-89-019753
Subject:
14 SOLAR ENERGY; FLAT PLATE COLLECTORS; CORROSION PROTECTION; DEHUMIDIFICATION; DESIGN; HEAT TRANSFER FLUIDS; SEALING MATERIALS; EQUIPMENT; FLUIDS; MATERIALS; SOLAR COLLECTORS; SOLAR EQUIPMENT; 141000* - Solar Collectors & Concentrators
OSTI ID:
6572902
Research Organizations:
Ontario Research Foundation, Sheridan Park (Canada)
Country of Origin:
Canada
Language:
English
Availability:
CANMET/TID, Energy, Mines and Resources Canada, 555 Booth St., Ottawa, Ont., Canada K1A 0G1; $0.34CAN per page, $3.40 CAN minimum.
Submitting Site:
CANM
Size:
Pages: 32
Announcement Date:
May 13, 2001

Citation Formats

None. Protecting solar collector systems from corrosion. Canada: N. p., 1978. Web.
None. Protecting solar collector systems from corrosion. Canada.
None. 1978. "Protecting solar collector systems from corrosion." Canada.
@misc{etde_6572902,
title = {Protecting solar collector systems from corrosion}
author = {None}
abstractNote = {The main cause of the reduced life of a solar heating system is corrosion of the exterior parts and the internal components. This report outlines ways of reducing the cost of solar heating by reducing the corrosion in solar heating systems, and hence increasing the system's service life. Mechanisms for corrosion are discussed: these include galvanic corrosion and crevice corrosion. Means of minimizing corrosion at the design stage are then described. Such methods, when designing the solar collector, involve ensuring proper drainage of exterior water; eliminating situations where moisture, dirt and pollutants may collect; preventing condensation inside the collector; using proper gaskets and sealants at appropriate places; and selecting optimum materials and coatings. Interior corrosion can be minimized at the design stage by choosing a good heat transfer fluid and corrosion inhibitor, in the case of systems where liquids are used; ensuring a low enough flow rate to avoid erosion; designing the system to avoid crevices; and avoiding situations where galvanic corrosion could occur. Other procedures are given for minimizing corrosion in the construction and operation of solar heating systems. 7 figs., 7 tabs.}
place = {Canada}
year = {1978}
month = {Jan}
}