BS EN 13771-2:2017 – TC:2020 Edition
$217.84
Tracked Changes. Compressors and condensing units for refrigeration. Performance testing and test methods – Condensing units
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 79 |
This European Standard applies only to condensing units for refrigeration and describes a number of selected performance test methods. These methods provide sufficiently accurate results for the determination of the refrigerating capacity, power absorbed, refrigerant mass flow and the coefficient of performance. This European Standard applies only to performance tests conducted at the manufacturer’s works or wherever the instrumentation and load stability for testing to the accuracy required is available.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 47 | National foreword |
| 51 | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions |
| 54 | 3.2 Symbols |
| 57 | 3.3 Refrigerant circuit state points 4 Uncertainty of measurement and test conditions 4.1 Uncertainty of performance data 4.2 Uncertainty of measurement |
| 59 | 4.3 Test conditions |
| 60 | 5 General requirements 5.1 Test equipment 5.2 Calculation methods 5.2.1 Principle 5.2.2 Specific enthalpy 5.2.3 Refrigerant mass flow 5.2.4 Power absorbed 5.2.5 Basic formulae |
| 62 | 5.3 Requirements for the selection of test methods 5.3.1 General 5.3.2 Second concurrent test 5.4 Test procedure 5.4.1 General 5.4.2 Steady working conditions 5.4.3 Recording of measured data 5.5 Pressure and temperature measuring points |
| 63 | 5.6 Oil circulation 5.7 Refrigerant composition 5.8 Calibration and requirements regarding measurement uncertainty 5.8.1 Calibration of calorimeters for methods A, B and C |
| 64 | 5.8.2 Determination of the refrigerating capacity 5.8.3 Determination of the power absorbed by the condensing unit 5.9 Source of refrigerant data 5.10 Test setup for air cooled condensing units 5.10.1 Air inlet temperature 5.10.2 Test room |
| 65 | 5.10.3 Refrigerant charge 6 Test methods 6.1 General 6.2 List of test methods 6.2.1 Calorimetric methods 6.2.1.1 Evaporator calorimeter |
| 66 | 6.2.1.2 Condenser calorimeter 6.2.2 Flow meter methods 6.3 Method A: secondary fluid calorimeter on the suction side 6.3.1 Description |
| 67 | 6.3.2 Calibration 6.3.3 Test procedure 6.3.3.1 General 6.3.3.2 Water cooled condensing unit 6.3.3.3 Air cooled condensing unit 6.3.4 Requirements 6.3.5 Determination of refrigerant mass flow 6.4 Method B: dry system refrigerant calorimeter on the suction side 6.4.1 Description |
| 68 | 6.4.2 Calibration 6.4.3 Test procedure 6.4.4 Requirements |
| 69 | 6.4.5 Determination of refrigerant mass flow 6.5 Method C: Water cooled condenser calorimeter 6.5.1 Description |
| 70 | 6.5.2 Calibration 6.5.3 Test procedure 6.5.4 Requirements 6.5.5 Determination of refrigerant mass flow 6.6 Method D: Refrigerant gas flow meter on the suction side (see 6.6) 6.6.1 Description |
| 71 | 6.6.2 Test procedure 6.6.3 Requirements 6.6.4 Determination of refrigerant mass flow 6.6.4.1 Measurement with mass flow meter 6.6.4.2 Measurement with volumetric flow meter 6.7 Method E: refrigerant flow meter in the liquid line 6.7.1 Description |
| 72 | 6.7.2 Test procedure 6.7.3 Requirements 6.7.4 Determination of the refrigerant mass flow |
| 73 | 7 Determination of the power absorbed by the condensing unit 7.1 General 7.1.1 Introduction 7.1.2 Measurement for condensing units where the motor is not an integral part of the condensing unit 7.1.3 Measurement for condensing units where the motor is an integral part of the condensing unit 7.1.4 Measurement of the power absorbed by the auxiliary components and fans 7.2 Calculation |
| 74 | 8 Test report 8.1 General |
| 75 | 8.2 Test data 8.3 Test results 8.4 Overview of test values |
