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Abstract

Tests proposed in the literature for evaluation of the durability of solar collectors have been examined experimentally. The following tests are retained as being the most significant ones: In the field of qualification tests: Thermal shocks, hail test, overpressure and leak test (of absorber). In the field of efficiency degradation: Dry outdoor and simulated indoor exposure, rain tightness test. Other tests, as for instance exposure to simulated loads (pressure, suction or longitudinal loads), thermal cycling, ultraviolet irradiation, humidity treatment, ozone treatment and hail tests on flat plate collectors have been found to be less significant. Results of the tests and conclusions are reported in the paper. Standard corrosion test procedures showed effects under certain conditions leaving doubts however for their correlation to real service conditions. A series of weathering experiments under simulated service conditions in different typical climate zones was started in order to get confirmed data.

Additional information

Authors: RIESCH G, JRC ISPRA ESTAB. (ITALY);WEISGERBER P JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: FIRST EC CONFERENCE ON SOLAR HEATING, AMSTERDAM (THE NETHERLANDS), APRIL 30-MAY 4, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31439 ORA
Availability: Can be ordered online
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