ASTM E905 Standard Test Method For Determining Thermal Performance Of Tracking Concentrating Solar Collectors
Thermal performance of tracking concentrated solar collectors, which heat fluids for use in thermal systems, may be measured using this test technique. ASTM E905 helps determine the characteristics of solar collections by expressing the final results in SI units. It is important to remember that the values provided in SI units are the norm. The values in parenthesis following SI units are not considered standard and are merely for informational purposes.
Scope:
The ASTM E905 approach only applies to collectors with a geometric concentration ratio of seven or above. For one- or two-axis tracking reflecting concentrating collectors and collectors for which a single inlet and outlet may be effectively supplied, a single inlet and outlet may be provided (e.g., several collector modules with inlets and outlets in tandem).
For collectors whose design makes it almost difficult to estimate their performance under diffuse irradiation, this approach is used instead to quantify their output using direct irradiance measurements.
Procedure:
This ASTM E905 test method may be used to test collectors with just one inlet and one outlet. It can also be used to test collectors with more than one inlet and outlet, such as those with numerous inlets and outlets connected in a series or parallel configuration.
Diffuse radiation has little influence on collector performance; hence, this test technique should only be used for collectors that can be defined in direct radiation.
To be effective, this test procedure must be carried out outdoors under quasi-steady-state circumstances.
In addition to the existing standard, further standards are expected to cover the selection and preparation of the collector, the calculation of efficiency, and the manipulation of the data generated as a result of this standard to grade.
According to the Technical Barriers to Trade (TBT) Committee of the World Trade Organization, this international standard was developed under internationally recognized standards-development principles.
Result:
This ASTM E905 test technique does not give a way to determine the collector’s or component’s durability or dependability.
Conclusion:
This test technique may measure the thermal performance of tracking concentrated solar collectors, which heat fluids for thermal systems. ASTM E905 helps determine the characteristics of solar collections by expressing the final results in SI units.
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