Black box correlation procedures

• ISO 9459-2 is applicable to solar-only systems and solar preheat systems. The performance test for solar-only systems is a "black box" procedure, which produces a family of "input-output" characteristics for a system. The test results may be used directly with daily mean values of local solar irradiation, ambient air temperature, and cold-water temperature data to predict annual system performance.

• The results of tests performed in accordance with ISO 9459-2 permit performance predictions for a range of system loads and operating conditions, but only for an evening draw-off.

• ISO 9459-3 applies to solar plus supplementary systems. The performance test is a "black box" procedure, which produces coefficients in a correlation equation that can be used with daily mean values of local solar irradiation, ambient air temperature, and cold-water temperature data to predict annual system performance. The test is limited to predicting annual performance for one load pattern.

• The results of tests performed in accordance with ISO 9459-3 permit annual system performance predictions for one daily load pattern. During the test, the system is operated with a constant daily load until a series of test periods of 5-15 days duration is obtained.

Was this article helpful?

0 0
Getting Started With Solar

Getting Started With Solar

Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.

Get My Free Ebook


Responses

  • Sandra
    What are the procedures of the solar box?
    8 years ago

Post a comment