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ASTM E 905 Document Information:
Title
Standard Test Method for Determining Thermal Performance of Tracking Concentrating Solar Collectors
ASTM International
Publication Date:
Aug 28, 1987
Scope:
This test method covers the determination of thermal performance
of tracking concentrating solar collectors that heat fluids for use
in thermal systems.
This test method applies to one- or two-axis tracking reflecting
concentrating collectors in which the fluid enters the collector
through a single inlet and leaves the collector through a single
outlet, and to those collectors where a single inlet and outlet can
be effectively provided, such as into parallel inlets and outlets
of multiple collector modules.
This test method is intended for those collectors whose design
is such that the effects of diffuse irradiance on performance is
negligible and whose performance can be characterized in terms of
direct irradiance.
NOTE 1—For purposes of clarification, this method shall apply to
collectors with a geometric concentration ratio of seven or
greater.
The collector may be tested either as a thermal collection
subsystem where the effects of tracking errors have been
essentially removed from the thermal performance, or as a system
with the manufacturer-supplied tracking mechanism.
The tests appear as follows:
This test method is not intended for and may not be applicable
to phase-change or thermosyphon collectors, to any collector under
operating conditions where phase-change occurs, to fixed
mirror-tracking receiver collectors, or to central receivers.
This test method is for outdoor testing only, under clear sky,
quasi-steady state conditions.
Selection and preparation of the collector (sampling method,
preconditioning, mounting, alignment, etc.), calculation of
efficiency, and manipulation of the data generated through use of
this standard for rating purposes are beyond the scope of this test
method, and are expected to be covered elsewhere.
This test method does not provide a means of determining the
durability or the reliability of any collector or component.
The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
only.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- single-axis
- thermal performance
- tracking concentrating solar collectors
- two-axis
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