ASTM E1240-88(1996)
(Test Method)Test Method for Performance Testing of Wind Energy Conversion Systems (Withdrawn 2001)
Test Method for Performance Testing of Wind Energy Conversion Systems (Withdrawn 2001)
SCOPE
1.1 This test method covers a test method for determining and reporting performance characteristics of Wind Energy Conversion Systems (WECS). It is intended to provide consumers and other users with an equitable basis for comparing the energy production performance and operating characteristics of WECS available in the marketplace.
1.2 This test method is not limited to WECS that produce electricity.
1.3 These procedures and practices were specifically compiled for small WECS (SWECS), but the test method may be generally applicable to WECS of all sizes.
1.4 This test method does not address issues of reliability, durability, or economics.
1.5 For all ratings dependent upon wind speed, the wind is taken to be that which is experienced at the centerline height of the WECS rotor. No standard heights for either the WECS rotor or the anemometer are assumed.
1.6 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.7 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.
General Information
Standards Content (Sample)
Designation: E 1240 – 88 (Reapproved 1996) 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
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Performance Testing of Wind Energy Conversion Systems
This standard is issued under the fixed designation E 1240; 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.
INTRODUCTION
This test method describes a standard test method of determining and reporting primary
performance characteristics of wind energy conversion systems (WECS). It includes field test
procedures to determine the power production performance and other operating parameters for a
WECS; a field test procedure to determine noise levels associated with the WECS operation; and
procedures for deriving the WECS performance parameters and the manner in which these ratings
should be presented.
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1. Scope S1.4 Specification for Sound Level Meters
1.1 This test method covers a test method for determining
3. Terminology
and reporting performance characteristics of Wind Energy
3.1 Definitions of Terms Specific to This Standard:
Conversion Systems (WECS). It is intended to provide con-
3.1.1 asynchronous WECS, n—wind energy conversion sys-
sumers and other users with an equitable basis for comparing
tem in which the rotor speed is more a function of wind speed
the energy production performance and operating characteris-
than of generator characteristics.
tics of WECS available in the marketplace.
3.1.2 average noise level, n—weighted average of the noise
1.2 This test method is not limited to WECS that produce
levels experimentally obtained for a WECS operating at
electricity.
various wind speeds.
1.3 These procedures and practices were specifically com-
3.1.3 AWEA (American Wind Energy Association) estimated
piled for small WECS (SWECS), but the test method may be
annual energy output (AEAEO), n—calculated total energy that
generally applicable to WECS of all sizes.
would be produced by a WECS during a one-year period,
1.4 This test method does not address issues of reliability,
assuming a Rayleigh wind speed distribution, based upon
durability, or economics.
yearly mean wind speed, and 100 % availability.
1.5 For all ratings dependent upon wind speed, the wind is
3.1.4 bin, n—wind speed interval used for test data group-
taken to be that which is experienced at the centerline height of
ing in the Method of Bins data reduction procedure.
the WECS rotor. No standard heights for either the WECS rotor
3.1.5 bin sort, n—bin-by-bin summary of the results of a
or the anemometer are assumed.
Method of Bins procedure.
1.6 The values stated in inch-pound units are to be regarded
3.1.6 bin width, n—size of a wind speed interval used in the
as the standard. The values given in parentheses are for
Method of Bins data reduction procedure (that is, a bin having
information only.
a span from 11.5 mph to 12.5 mph has a width of 1 mph).
1.7 This standard does not purport to address all of the
3.1.7 centerline height of the rotor, n—distance between the
safety concerns, if any, associated with its use. It is the
group and the vertical center of the rotor.
responsibility of the user of this standard to establish appro-
3.1.8 constant velocity test (CVT), n—wind energy conver-
priate safety and health practices and determine the applica-
sion system test in which a smooth steady airflow is maintained
bility of regulatory limitations prior to use.
either in a wind tunnel or by moving the WECS, relative to the
2. Referenced Documents ground, in calm air.
3.1.9 cut-in wind speed, n—lowest wind speed at which a
2.1 ANSI Standard:
WECS will begin to have power output.
3.1.10 cut-out wind speed, n—wind speed above which a
WECS will have, due to a control function, no power output.
3.1.11 downwind, n—relative orientation of two points
where A is downwind if the wind first passes B then A.
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This test method is under the jurisdiction of ASTM Committee E-44 on Solar,
Geothermal, and Other Alternative Energy Sources and is the direct responsibility of
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Subcommittee E44.90 on Geothermal Materials. Available from American National Standard Institute, 11 W. 42nd St., 13th
Current edition approved March 25, 1988. Published May 1988. Floor, New York, NY 10036.
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E 1240
3.1.12 dwell time, n—number of samples in a bin divided by tem in which the rotor speed is more a function of generator
the sampling rate (in samples per second). characteristics than of wind speed.
3.1.13 field test, n—performance test that is carried out 3.1.32 tower, n—subsystem of a WECS that supports the
under naturally occurring atmospheric conditions. rotor, or othe
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