10 CFR § 431.344 - Test procedure for measuring and determining energy efficiency of compressors.
(a) Scope. This section is a test procedure that is applicable to a compressor that meets the following criteria:
(1) Is an air compressor;
(2) Is a rotary compressor;
(3) Is not a liquid ring compressor;
(4) Is driven by a brushless electric motor;
(5) Is a lubricated compressor;
(6) Has a full-load operating pressure greater than or equal to 75 pounds per square inch gauge (psig) and less than or equal to 200 psig;
(7) Is not designed and tested to the requirements of the American Petroleum Institute Standard 619, “Rotary-Type Positive-Displacement Compressors for Petroleum, Petrochemical, and Natural Gas Industries;”
(8) Has full-load actual volume flow rate greater than or equal to 35 cubic feet per minute (cfm), or is distributed in commerce with a compressor motor nominal horsepower greater than or equal to 10 horsepower (hp); and
(b) Testing and calculations. Determine the applicable full-load package isentropic efficiency (ηisen,FL), part-load package isentropic efficiency (ηisen,PL), package specific power, maximum full-flow operating pressure, full-load operating pressure, full-load actual volume flow rate, and pressure ratio at full-load operating pressure using the test procedure set forth in appendix A of this subpart.
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