ASTM-E905 2007

$44.96

E905-87(2007) Standard Test Method for Determining Thermal Performance of Tracking Concentrating Solar Collectors

Published By	Publication Date	Number of Pages
ASTM	2007	14

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Category: ASTM

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Description

1.1 This test method covers the determination of thermal performance of tracking concentrating solar collectors that heat fluids for use in thermal systems.

1.2 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.

1.3 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 1For purposes of clarification, this method shall apply to collectors with a geometric concentration ratio of seven or greater.

1.4 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.

1.4.1 The tests appear as follows:

1.5 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.

1.6 This test method is for outdoor testing only, under clear sky, quasi-steady state conditions.

1.7 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.

1.8 This test method does not provide a means of determining the durability or the reliability of any collector or component.

1.9 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.10 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.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
3	Summary of Test Method Significance and Use
4	Interferences TABLE 1
5	Apparatus Precautions
6	Preparation of Apparatus Test Conditions
7	Scope Summary of Test Methods Procedure
9	Scope Summary of Test Methods Procedure Scope Summary of Test Methods Procedure
10	Scope Summary of Test Methods Procedure Calculations
11	Report Keywords
12	A1. END EFFECTS A1.1 A1.2 A1.3 A1.4 FIG. 1
13	A1.5 A1.6 A2. EQUATIONS FOR ANGLES OF INCIDENCE FOR LINEAR SINGLE-AXIS TRACKING COLLECTORS A2.1
14	X1. EQUATIONS THAT MAY BE USED TO ESTIMATE ANGLE OF INCIDENCE WITH VARIOUS KINDS OF RECEIVERS X1.1

Additional information

	Section
Linear Single-Axis Tracking Collectors Tested as Thermal Collection Subsystems	11-13
System Testing of Point Focus and Linear Two-Axis Tracking Collectors	20-22
Linear Two-Axis Tracking and Point Focus Collectors Tested as Thermal Collection Subsystems	17-19
System Testing of Linear Single-Axis Tracking Collectors	14-16

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ASTM-E905 2007

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