Foreword

1Scope

2Normative references

3Terms and definitions

4Symbols and units

5Performance warranty

5.1General

5.2Subject of technical warranties

5.2.1General

5.2.2Refrigerating capacity

5.2.3Compressor absorbed power

5.2.4Absorbed power of ancillaries

5.2.5Absorbed power of the entire system

5.2.6Cooling water demand

5.2.7Coefficient of performance

5.3Operating conditions for technical warranties

5.3.1General

5.3.2Overall refrigerating capacity

5.3.3Net or useful refrigerating capacity

5.3.4Conversion to warranty conditions

5.4Tolerance

5.5Acceptance limit

6Test preparation and procedure

7Measuring instruments

7.1General

7.2Temperature measuring instruments

7.3Pressure gauges

7.4Measuring instruments for electric power

7.5Flow meters

7.6Speed measuring devices

7.7Torque measuring devices

7.8Time measuring devices

7.9Mass measuring devices

8Determination of the refrigerating capacity

8.1Direct methods

8.1.1Overall refrigerating capacity

8.1.1.1General

8.1.1.2Determination of the refrigerant mass flow from the heat balance

8.1.1.3Determination of the refrigerant mass flow by means of a flow meter

8.1.2Net refrigerating capacity for a liquid cooled medium

8.1.3Useful refrigerating capacity

8.1.3.1General

8.1.3.2Direct measurement

8.1.3.3Calorimetric measurement

8.2Indirect methods

8.2.1General

8.2.2Determination of the overall refrigerating capacity by means of a calibrated compressor

8.2.3Determination of the net refrigerating capacity

8.2.4Determination of the useful refrigerating capacity

8.2.5Determination of the overall refrigerating capacity from the overall energy balance

9Determination of the drive power

9.1Power absorbed by the compressor

10Measurement uncertainties

11Results, conversion to guaranteed values

12Material properties

Bibliography