ASTM E1089-86(1995)

Standard Test Method for Water Penetration of Flat Plate Solar Collectors by Uniform Static Air Pressure Difference

SCOPE
1.1 This test method covers the determination of the resistance of flat plate solar collectors to water penetration when water is applied to their outer surfaces with a static air pressure at the outer surface higher than the pressure at the interior of the collector.
1.2 This test method is applicable to any flat plate solar collector.
1.3 The proper use of this test method requires a knowledge of the principles of pressure and deflection measurement.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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. Specific precautionary information is contained in Section 6.

General Information

• Status: Historical
• Publication Date: 30-Jan-1986
• Technical Committee: E44 - Solar, Geothermal and Other Alternative Energy Sources

Relations

• Replaced By: ASTM E1089-86(2001) - Standard Test Method for Water Penetration of Flat Plate Solar Collectors by Uniform Static Air Pressure Difference
• Effective Date: 31-Jan-1986

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: E 1089 – 86 (Reapproved 1995) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Water Penetration of Flat Plate Solar Collectors by Uniform
Static Air Pressure Difference
This standard is issued under the fixed designation E 1089; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope surfaces of the test specimen under specified conditions of air
pressure difference across the specimen during a 15-min test
1.1 This test method covers the determination of the resis-
period.
tance of flat plate solar collectors to water penetration when
water is applied to their outer surfaces with a static air pressure
4. Summary of Method
at the outer surface higher than the pressure at the interior of
4.1 The test consists of either of the following:
the collector.
4.1.1 Sealing the test specimen into or against one face of a
1.2 This test method is applicable to any flat plate solar
test chamber, supplying air to or exhausting air from the
collector.
chamber at the rate required to maintain the test pressure
1.3 The proper use of this test method requires a knowledge
difference across the specimen, while spraying water onto the
of the principles of pressure and deflection measurement.
outdoor face of the specimen at the required rate and observing
1.4 The values stated in SI units are to be regarded as the
any water leakage,
standard. The values given in parentheses are for information
4.1.2 Alternately exhausting air from the interior of the
only.
collector to create the pressure differential, or
1.5 This standard does not purport to address all of the
4.1.3 Any other method that can create a similar pressure
safety concerns, if any, associated with its use. It is the
difference.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use. Specific precau-
5.1 The rain spray test described in 8.1 as Method A is based
tionary information is contained in Section 6.
upon Test Method E 331 which is intended for use in the
2. Referenced Documents evaluation of exterior windows, curtain walls, and doors. This
test method is intended to supplement the water spray test in
2.1 ASTM Standards:
Practice E 823 that does not include the effects of wind-driven
E 331 Test Method for Water Penetration of Exterior Win-
rain. This method includes the use of a pressure differential to
dows, Curtain Walls, and Doors by Uniform Static Air
enhance the penetration of water into the assembly being
Pressure Difference
tested. This type of pressure differential can occur with many
E 823 Practice for Nonoperational Exposure and Inspection
3 types of solar collector mounting configurations. In the case of
of a Solar Collector
solar collectors that form a building element, for example, a
3. Terminology roof, this pressure differential will be caused by differences of
pressure inside and outside the building. In the case of solar
3.1 Definitions of Terms Specific to This Standard:
collectors mounted on standoffs or racks, this pressure differ-
3.1.1 specimen, n—the entire assembled unit as submitted
ential will be caused by positive and negative wind forces
for test.
acting simultaneously on faces of the collector.
3.1.2 test pressure difference, n—the specified difference in
5.2 Water leakage due to joint expansion can be influenced
static air pressure across the specimen expressed as pascals or
by several factors, including: the specific collector design and
pounds-force per square foot.
materials used, the test specimen temperature, and the water
3.1.3 water leakage, n—penetration of water into the inner
spray temperature (Note 1), in addition to the pressure differ-
ential. The temperature conditions will vary in outdoor expo-
This test method is under the jurisdiction of ASTM Committee E-44 on Solar, sure. The test temperatures should be selected to be represen-
Geothermal, and Other Alternative Energy Sources and is the direct responsibility of
tative of outdoor conditions where the collectors will be used.
Subcommittee E44.05 on Solar Heating and Cooling Subsystems and Systems.
Current edition approved Jan. 31, 1986. Published March 1986.
NOTE 1—Water spray temperatures are likely to range from 4.5°C to
Annual Book of ASTM Standards, Vol 04.07.
29.4°C (40 to 85°F).
Annual Book of ASTM Standards, Vol 12.02.
E 1089
6. Safety Precautions 9.3.2 Maintain air-pressure difference and water spray for
15 min. Measure the temperature (Note 4) of exposed surfaces
6.1 Glass breakage will not normally occur at the small
of the solar collector immediately after the start of the test and
pressure differences applied in this test. Excessive pressure
before ending the test. Measure the inlet water temperature.
differences may occur, however, due to error in operation or
when the apparatus is used for other purposes such as structural
NOTE 4—Measure temperature on side frame and glazing. Cover with
testing. Therefore, exercise adequate precautions to protect tape or silicone rubber.
personnel.
9.3.3 Remove the air-pressure difference and stop the water
spray.
7. Test Specimen
9.4 Step 4—Dry exterior collector surfaces, and weigh the
7.1 The test specimen sha
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