NBN EN 13771-2 : 2007

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
  3.1 Terms and definitions
  3.2 Symbols
  3.3 Refrigerant circuit state points
4 General requirements
  4.1 Test equipment
  4.2 Calculation methods
       4.2.1 Principle
       4.2.2 Specific enthalpy
       4.2.3 Refrigerant mass flow
       4.2.4 Power absorbed
       4.2.5 Basic equations
  4.3 Requirements for the selection of test methods
  4.4 Test procedure
       4.4.1 General
       4.4.2 Steady working conditions
       4.4.3 Recording of measured data
  4.5 Pressure and temperature measuring points
  4.6 Oil circulation
  4.7 Refrigerant composition
  4.8 Calibration and requirements regarding measurement
       uncertainty
       4.8.1 Calibration of calorimeters for methods A, B
             and C
       4.8.2 Determination of the refrigerating capacity
       4.8.3 Determination of the power absorbed by the
             condensing unit
       4.8.4 Measuring instruments
  4.9 Source of refrigerant data
  4.10 Allowable deviations from the basic test conditions
  4.11 Additional information
5 Test methods
  5.1 General
  5.2 List of test methods
       5.2.1 Calorimetric methods
       5.2.2 Flow meter methods
  5.3 Method A: secondary fluid calorimeter on the suction side
       5.3.1 Description
       5.3.2 Calibration
       5.3.3 Test procedure
       5.3.4 Requirements
       5.3.5 Determination of refrigerant mass flow
  5.4 Method B: dry system refrigerant calorimeter on the
       suction side
       5.4.1 Description
       5.4.2 Calibration
       5.4.3 Test procedure
       5.4.4 Requirements
       5.4.5 Determination of refrigerant mass flow
  5.5 Method C: water-cooled condenser on the discharge side
       5.5.1 Description
       5.5.2 Calibration
       5.5.3 Test procedure
       5.5.4 Requirements
       5.5.5 Determination of refrigerant mass flow
  5.6 Method D: refrigerant vapour flow meter on the suction
       side
       5.6.1 Description
       5.6.2 Test procedure
       5.6.3 Requirements
       5.6.4 Determination of refrigerant mass flow
  5.7 Method E: refrigerant flow meter in the liquid line
       5.7.1 Description
       5.7.2 Test procedure
       5.7.3 Requirements
       5.7.4 Determination of the refrigerant mass flow
6 Determination of the power absorbed by the condensing unit
  6.1 General
       6.1.1 Introduction
       6.1.2 Measurement for condensing units where the motor
             is not an integral part of the unit
       6.1.3 Measurement for condensing units where the
             motor is an integral part of the condensing unit
       6.1.4 Measurement of the power absorbed by the
             auxiliary components
  6.2 Calculation
7 Test report
  7.1 General
  7.2 General information in the test report
  7.3 Basic data
  7.4 Test results
  7.5 Additional information
Bibliography