Document ID: chunk:federal_register_of_legislation:F2015L01712:clause:1_3
Version: federal_register_of_legislation:F2015L01712
Segment Type: clause
Provision Reference: sch 1 cl 3
Character Range: 57593–58801

3  Equations 13 and 14—calculation of overall driven fan efficiency (𝜂i)
 (1) For equation 12, if paragraph (a) of the definition of 𝜂i is applicable, 𝜂i is worked out using the equation (equation 13):
  where:
PU,i is the fan air power or fan static air power (as appropriate) in kilowatts, as measured in testing using the same drive, motor and transmission as the fan to be installed.
PE,i is the motor input power of the fan in kilowatts, as measured in testing using the same drive, motor and transmission as the fan to be installed.
Note: For the testing for PU,i and PE,i, see paragraphs 16(4)(b) and (5)(d) and (e) of this determination.
 (2) For equation 12, if paragraph (b) of the definition of 𝜂i is applicable, 𝜂i is worked out using the equation (equation 14):
  where:
PU,i is the fan air power or fan static air power (as appropriate) in kilowatts as determined from test results in accordance with section 16 of this determination.
PE,i is the motor input power of the fan in kilowatts, as calculated in accordance with equation 15.
Note: The factor 0.9 is a mismatch factor that reflects that the testing was not done with the same drive, motor and transmission of the fan to be installed.