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.

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Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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

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