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BS EN 13771-1:2016 Compressors and condensing units for refrigeration. Performance testing and test methods - Refrigerant compressors, 2017
- Contents Page
- European foreword
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and symbols [Go to Page]
- 3.1 Terms and definitions
- 3.2 Symbols
- Table 1 — Symbols
- Table 2 — Indexes [Go to Page]
- 3.3 Refrigerant circuit state points
- Figure 1 — Refrigerant circuit
- 4 Uncertainty of measurement and test conditions [Go to Page]
- 4.1 Uncertainty of performance data
- 4.2 Uncertainty of measurement
- 4.3 Test conditions
- Table 3 — Specified test conditions and the allowable deviations
- 5 General requirements [Go to Page]
- 5.1 Calculation methods [Go to Page]
- 5.1.1 Principle
- 5.1.2 Specific enthalpy
- 5.1.3 Refrigerant mass flow
- 5.1.4 Power absorbed
- 5.1.5 Basic formulas [Go to Page]
- 5.1.5.1 Mass flow
- 5.1.5.2 Compressor refrigerating capacity
- 5.2 Requirements for the selection of test method [Go to Page]
- 5.2.1 General
- 5.2.2 Second concurrent test
- 5.3 Test period [Go to Page]
- 5.3.1 General
- 5.3.2 Steady-state conditions
- 5.3.3 Recording of measured data
- 5.4 Pressure and temperature measuring points
- 5.5 Oil circulation
- 5.6 Fractionation
- 5.7 Calibration of calorimeters for methods A, B and C [Go to Page]
- 5.7.1 Heat leakage
- 5.7.2 Reference temperature
- 5.7.3 Calibration procedure
- 5.8 Source of refrigerant data
- 6 Test methods [Go to Page]
- 6.1 General
- 6.2 List of test methods [Go to Page]
- 6.2.1 Calorimetric methods
- 6.2.2 Flow meter methods
- 6.3 Method A: Secondary fluid calorimeter on the suction side [Go to Page]
- 6.3.1 Description
- Figure 2 — Secondary fluid calorimeter, Method A
- Figure 3 — Secondary fluid calorimeters, method A for compressor with intermediate pressure inlet [Go to Page]
- 6.3.2 Calibration
- 6.3.3 Test procedure
- 6.3.4 Requirements
- 6.3.5 Additional information
- 6.4 Determination of refrigerant mass flow
- 6.5 Method B: Dry system refrigerant calorimeter on the suction side [Go to Page]
- 6.5.1 Description
- Figure 4 — Dry system refrigerant calorimeter, method B
- Figure 5 — Dry system refrigerant calorimeter, compressor with intermediate pressure inlet
- Figure 6 — Dry system refrigerant calorimeter, method B for compressor with factory assembled economizer HX [Go to Page]
- 6.5.2 Calibration
- 6.5.3 Test procedure
- 6.5.4 Requirements
- 6.5.5 Additional information
- 6.5.6 Determination of refrigerant mass flow
- 6.6 Method C: Water-cooled condenser/gas cooler on the discharge side [Go to Page]
- 6.6.1 Description
- Figure 7 — Water-cooled condenser/gas cooler, method C [Go to Page]
- 6.6.2 Calibration
- 6.6.3 Test procedure
- 6.6.4 Requirements
- 6.6.5 Additional information
- 6.6.6 Determination of refrigerant mass flow
- 6.7 Method D: Refrigerant gas flow meter [Go to Page]
- 6.7.1 Description
- Figure 8 — Refrigerant gas flow meters, method D1 or D2
- Figure 9 — Refrigerant gas flow meter, method D for compressors with intermediate pressure inlet [Go to Page]
- 6.7.2 Requirements
- 6.7.3 Additional information
- 6.7.4 Determination of refrigerant mass flow
- 6.8 Method E: Refrigerant flow meter in the liquid line [Go to Page]
- 6.8.1 General
- 6.8.2 Description
- Figure 10 — Refrigerant flow meter, method E for single stage subcritical compression [Go to Page]
- 6.8.3 Test procedure
- 6.8.4 Requirements
- 6.8.5 Additional information
- 6.8.6 Determination of the refrigerant and oil mass flow [Go to Page]
- 6.8.6.1 The refrigerant mass flow, as determined by the test, is given by the following formulas
- 6.8.6.2 The following applies to the oil mass flow
- 7 Determination of the power absorbed by the compressor [Go to Page]
- 7.1 Measurement [Go to Page]
- 7.1.1 General
- 7.1.2 Measurement for externally driven compressors
- 7.1.3 Measurement for motor compressors
- 7.2 Calculation
- 8 Test report [Go to Page]
- 8.1 General
- 8.2 Basic data
- 8.3 Additional data
- 8.4 Test results
- Annex A (normative) Conversion of measured performance data to specified test conditions for compressors with intermediate pressure port
- Figure A.1 — Dry system refrigerant calorimeter, method B for compressor with factory assembled economizer HX
- Bibliography [Go to Page]