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ASHRAE Standard 30-2025 -- Method of Testing Liquid Chillers (ANSI Approved), 2025
- ASHRAE Online Bookstore
- Addenda
- Errata
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- ANSI/ASHRAE Standard 30-2025 [Go to Page]
- Contents
- Foreword
- 1. Purpose [Go to Page]
- 1.1 The purpose of this standard is to prescribe methods of testing to measure the thermal capacity, energy efficiency, and liquid pressure drop of packaged liquid-chiller equipment using a refrigerant vapor compression cycle.
- 1.2 This standard does not specify methods of establishing published ratings or performance tolerances.
- 2. Scope [Go to Page]
- 2.1 This standard applies to the following packaged equipment using any type of compressor:
- 2.2 This standard includes packaged equipment provided in more than one assembly if the separated or remote assemblies are designed to be used together and are connected together during the test.
- 2.3 This standard does not include the following types of equipment:
- 2.4 This standard does not include testing of chillers in field installations.
- 2.5 This standard does not specify the test operating conditions.
- 2.6 This standard does not specify methods of performance ratings certification.
- 3. Definitions, Abbreviations, and Acronyms
- 4. Equipment Types [Go to Page]
- 4.1 This standard includes methods of test for the equipment types described in Section 2 using the vapor compression cycle with the following limitations.
- 5. Calculations and Conversions [Go to Page]
- 5.1 Fluid Properties
- 5.2 Data Processing. Data-point measurements collected during the duration of the testing period shall be processed to calculate sample mean and sample standard deviation per the following equations. Calculate final performance metrics (capacity, eff...
- 5.3 Redundant Measurements
- 5.4 Performance. Refer to Normative Appendix D for schematics of each system type and the physical location of measurement instruments.
- 5.5 Validation. Test results are validated by checking an energy balance and a voltage balance.
- 5.6 Conversions
- 5.7 Rounding and Significant Digits
- 6. Test Requirements [Go to Page]
- 6.1 Tests shall report measurement values and calculated results in accordance with methods and procedures described in this method of test.
- 6.2 From a test perspective, it is best to maintain heat transfer surfaces by cleaning or maintaining proper liquid treatment to avoid highly fouled conditions and the associated efficiency loss.
- 6.3 Instrumentation. This section defines requirements for each type of measurement (temperature, flow, pressure, power). Instruments shall be selected, installed, operated, and maintained according to the requirements of Table 6-1. Further details a...
- 6.4 Plan. A test plan shall document all requirements for conducting the test. This includes a list of the required full-load and part-load test points and associated operating conditions, including adjusted liquid temperature targets based on the ra...
- 6.5 Operating Condition Tolerances. Operating condition tolerances are defined to control two characteristics. The first is deviation of the mean value relative to the target value. The second is the stability, which is defined in statistical terms a...
- 6.6 Corrections. The following corrections shall be applied to test targets or test results when applicable.
- 6.7 Validation
- 7. Data to be Recorded [Go to Page]
- 7.1 General. For each test point, at a specific load and set of operating conditions, report the test time period and number of data point measurements. Include the sample mean and sample standard deviation for each measurement value (temperature, fl...
- 7.2 Primary Data. Table 7-1 summarizes the data to be recorded during the test for each of the data point samples.
- 7.3 Auxiliary Data. Table 7-2 summarizes the auxiliary data that shall be recorded for the test. Table 7-3 summarizes optional auxiliary data (nonmandatory) that may be recorded during the test for diagnostic information.
- 8. Test Procedures [Go to Page]
- 8.1 Purpose. This section prescribes a method of testing for liquid-chilling and liquid-heating packages using the vapor compression cycle and to verify capacity and power requirements at a specific set of steady- state conditions.
- 8.2 Test Procedures. For each test point at a specific load and set of operating conditions, the test will measure capacity, input power, and liquid-side pressure drop. Capacity, a measurement of the heat added to or removed from the liquid as it pas...
- 8.3 Chiller Condenser Entering Air Temperature Measurement Procedure
- 8.4 Liquid Pressure Drop Measurement Procedure
- 8.5 Heating Capacity Test Procedure
- 9. Reporting of Results [Go to Page]
- 9.1 General. Table 9-1 summarizes the results to be reported for each test type.
- 10. Nomenclature
- 11. Normative References
- Informative Appendix A: Informative References
- Informative Appendix B: System Calibration Worksheet
- Informative Appendix C: Water Pressure Drop Adjustment Worksheet
- Normative Appendix D: Measurement Points
- Informative Appendix E: Addenda Description [Go to Page]
