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eLibrary >
ASHRAE Standard 150-2025 -- Methods of Testing the Performance of Installed Cool-Storage Systems (ANSI Approved) >
ASHRAE Standard 150-2025 -- Methods of Testing the Performance of Installed Cool-Storage Systems (ANSI Approved), 2025
- ASHRAE Online Bookstore
- Addenda
- Errata
- Return to Previous Page
- ANSI/ASHRAE Standard 150-2025 [Go to Page]
- Contents
- Foreword
- 1. Purpose
- 2. Scope [Go to Page]
- 2.1 This standard covers cool-storage systems composed of chillers, storage medium, storage device or vessel, heat sink equipment or heat sink systems, and other auxiliary equipment required to provide a complete and working system. The standard is l...
- 2.2 This standard includes the following:
- 2.3 This standard does not cover the following:
- 3. Definitions
- 4. Types of Tests [Go to Page]
- 4.1 Discharge test measures the amount of cooling energy that can be delivered from the thermal storage device to meet the specified load profile.
- 4.2 Charge test measures the amount of cooling that can be stored in the thermal storage device within the time period available for charging.
- 4.3 Cool-storage system capacity test measures the amount of cooling energy that can be delivered by the system to meet the specified load profile. This test is identical to the discharge test if the thermal storage device is designed to provide full...
- 4.4 Cool-storage system efficiency test measures the cycle-specific energy use of the system.
- 5. Test Method 1—Minimum Testing of Latent Storage Systems [Go to Page]
- 5.1 Purpose. This procedure outlines the steps required for providing a performance test of a latent thermal storage device system, including devices that use different liquid solutions for charging and discharging (e.g., external melt ice-on-coil) a...
- 5.2 Apparatus
- 5.3 Test Method. The complete test shall include two individual test runs: an initial charge cycle test of the thermal storage device and the discharge cycle test to verify the temperatures at which the net usable storage capacity of the device can b...
- 6. Test Method 1—Procedure for Performance Test [Go to Page]
- 6.1 Data to be Taken. The following data shall be measured and recorded at intervals not exceeding five minutes over the duration of the initial charge and discharge cycle tests described in Section 5.
- 6.2 Preparation for Test
- 6.3 Test Requirements and Operational Limits
- 6.4 Test Sequence. A full test shall consist of an initial charge cycle test and a discharge cycle test conducted within 48 hours of charge test completion in the following sequence.
- 7. Test Method 1—Performance Test Calculations [Go to Page]
- 7.1 Charge Test Calculations
- 7.2 Discharge Test Calculations
- 8. Test Method 2—Minimum Testing of Sensible Thermal Storage Systems [Go to Page]
- 8.1 Purpose
- 8.2 Apparatus
- 8.3 Prior to Collecting Performance Test Data
- 9. Test Method 2—Procedure for the Performance Test [Go to Page]
- 9.1 The following data shall be collected for an analysis of the performance of the thermal energy storage (TES) tank.
- 9.2 TES Tank Charge Test
- 9.3 TES Tank Discharge Test
- 9.4 TES Tank Pressure Drop Test (Optional). During the data collection of the charge and/or discharge performance tests, record the following data at a minimum of four separate times during periods when the flow rate through the tank is near the desi...
- 9.5 TES Tank—Heat Gain Test. Typically, there are no temperature sensors located in the optimum place to measure the heat gain in a chilled water TES tank. Therefore, there is no recommended test procedure. See Section 10.4, “Heat Gain (Holding T...
- 10. Test Method 2—Performance Test Calculations [Go to Page]
- 10.1 Charge Test Calculations
- 10.2 Discharge Test Calculations
- 10.3 Pressure Drop Test Calculation
- 10.4 Heat Gain (Holding Test) Calculations. Based on the project specifications, the tank manufacturer shall submit calculations for review and approval by the owner’s engineer.
- 11. Test Method 3—Requirements [Go to Page]
- 11.1 Initialization
- 11.2 Apparatus
- 11.3 Required Information. The following information shall be specified by the test authority prior to performing tests under Test Method 3 of this standard:
- 11.4 Compliance with this standard shall not be claimed unless the required information specified in Section 11.3 has been provided. All required information shall be documented in the test report in accordance with Section 17.
- 12. Test Method 3—Instruments [Go to Page]
- 12.1 General
- 12.2 Temperature Measurement
- 12.3 Liquid Flow Measurement
- 12.4 Electric Power Measurement
- 12.5 Density Measurement
- 12.6 Refractive Index Measurement
- 12.7 Data Recording Instruments. The data listed in Section 15 shall be recorded by data recording instruments meeting the following requirements:
- 12.8 Field Calibration and Verification of Test Instruments
- 13. Test Method 3—Test Procedures [Go to Page]
- 13.1 Test Configurations
- 13.2 Determination of Test Conditions
- 13.3 Determining Fluid Properties. Properties shall be determined for the heat transfer fluid at the average temperature entering the thermal storage device. The density, specific heat, and viscosity of a heat transfer fluid other than water shall be...
- 14. Test Method 3—Test Execution [Go to Page]
- 14.1 Initialization. Before any testing is performed, the thermal storage device shall have been initialized as specified in Section 11.1.
- 14.2 Concurrent Testing. At the option of the test authority, the discharge test, cool-storage system capacity test, and cool-storage system efficiency test may be conducted concurrently.
- 14.3 Discharge Test
- 14.4 Charge Test
- 14.5 Cool-Storage System Capacity Test
- 14.6 Cool-Storage System Efficiency Test
- 15. Test Method 3—Data to be Recorded [Go to Page]
- 15.1 General. Record all measurements at the time intervals specified in Section 12.7. Record the time of each measurement to the nearest second. For each test, record the following quantities at the time intervals specified in Section 12.7:
- 15.2 Discharge Test. Record average values of the following quantities at the time intervals specified in Section 12.7:
- 15.3 Charge Test. Record average values of the following quantities at the time intervals specified in Section 12.7:
- 15.4 Cool-Storage System Capacity Test. Record average values of the following quantities at the time intervals specified in Section 12.7:
- 15.5 Cool-Storage System Efficiency Test. Record average values of the following quantities at the time intervals specified in Section 12.7:
- 16. Test Method 3—Calculation of Results [Go to Page]
- 16.1 Nomenclature, Symbols, and Subscripts
- 16.2 Calculation of Discharge Capacity from Temperature and Flow Measurements
- 16.3 Calculation of Charge Capacity from Temperature and Flow Measurements
- 16.4 Calculation of Cool-Storage System Capacity from Temperature and Flow Measurements
- 16.5 Calculation of Cycle-Specific Energy Consumption
- 16.6 Calculation of Storage Efficiency
- 17. Test Report
- 18. References
- Informative Appendix A: Discussion of Fluid Flow Measurement Methods for Method 3 and Reference Material for Methods 1 and 2 [Go to Page]
- A1. Introduction
- A2. Obstruction Sampling-Type Flowmeters [Go to Page]
- A2.1 Axial Turbine Meters. Axial turbine meters measure fluid flow by counting the rotations of the rotor that is placed in a flow stream. Axial turbine meters can be full-bore type or insertion type. Full-bore turbine meters have an axial rotor and ...
- A2.2 Vortex Meters. Vortex meters utilize the same physical effect that makes telephone wires oscillate in the wind between telephone poles. This effect is due to oscillating instabilities in fluid flow after it splits into two streams around a blunt...
- A2.3 Insertion Magnetic Meters. Insertion magnetic meters use Faraday’s law of electromagnetic induction to facilitate the measurement of sampled flow. Insertion magnetic meters are available with single or multiple sensors per probe. Greater accur...
- A3. Noninterfering Flowmeters [Go to Page]
- A3.1 Ultrasonic Flowmeters. Two basic types of ultrasonic flowmeters available for general use are transit time and Doppler. Transit-time ultrasonic flowmeters measure fluid velocities by detecting small differences in the transit time of sound waves...
- A3.2 Full-Bore Magnetic Flowmeters. Magnetic flowmeters use Faraday’s law of electromagnetic induction to measure the average flow velocity in a pipe. Magnetic coils surround the flow, using a pulsed DC- or AC-generated field to produce a signal. T...
- A4. Thermal Product Energy Use Measurements
- A5. References
- Informative Appendix B: Example Cool-Storage System Instrumentation Schematics for Method 3
- Normative Appendix C: Test Report Forms for Method 3
- Test Report Forms for Method 3
- Normative Appendix D: Classification of Test Equipment [Go to Page]
- 4.1 Classification. Thermal Storage Equipment is broadly classified as either “sensible” or “latent”, with further delineations as shown in Table 1 and explained in subsequent paragraphs. [Go to Page]
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