ASHRAE 94.3 10:2010 Edition

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ANSI/ASHRAE Standard 94.3 Method of Testing Active Sensible Thermal Energy Devices Based on Thermal Performance – WITHDRAWN

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ASHRAE	2010	18

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4	FOREWORD FOREWORD 1. PURPOSE 1. PURPOSE 2. SCOPE 2. SCOPE 2.1 This standard applies to sensible-heat-type thermal energy storage devices in which a transfer fluid enters the device through a single inlet and leaves the device through a single outlet. Storage devices having more than one inlet and/ or outlet… 2.1 This standard applies to sensible-heat-type thermal energy storage devices in which a transfer fluid enters the device through a single inlet and leaves the device through a single outlet. Storage devices having more than one inlet and/ or outlet… 2.2 This standard does not include factors relating to cost, life, reliability, or the consideration of requirements for interfacing with specific heating and cooling systems. 2.2 This standard does not include factors relating to cost, life, reliability, or the consideration of requirements for interfacing with specific heating and cooling systems. 2.3 The test procedure and equipment outlined in this standard are most easily adaptable to devices used to store thermal energy on the order of 107 Btu (1010 J) or less. 2.3 The test procedure and equipment outlined in this standard are most easily adaptable to devices used to store thermal energy on the order of 107 Btu (1010 J) or less. 3. DEFINITIONS 3. DEFINITIONS
5	4. CLASSIFICATIONS 4. CLASSIFICATIONS 5. REQUIREMENTS 5. REQUIREMENTS 5.1 The transfer fluid used in evaluating the performance of a thermal energy storage device shall have a known specific heat that varies by less than ±0.5% over the temperature range encountered during a test. 5.1 The transfer fluid used in evaluating the performance of a thermal energy storage device shall have a known specific heat that varies by less than ±0.5% over the temperature range encountered during a test. 5.2 The room where the testing of the storage device is performed shall have its temperature controlled to the extent that the average ambient air temperature, Ta, determined by the average of the four temperatures measured as specified in Section 8…. 5.2 The room where the testing of the storage device is performed shall have its temperature controlled to the extent that the average ambient air temperature, Ta, determined by the average of the four temperatures measured as specified in Section 8…. 6. INSTRUMENTATION 6. INSTRUMENTATION 6.1 Temperature Measurements 6.1 Temperature Measurements 6.2 Liquid Flow Measurements. The accuracy of the flow- measuring and associated readout devices shall be equal to or better than ±1.0% of the measured value. 6.2 Liquid Flow Measurements. The accuracy of the flow- measuring and associated readout devices shall be equal to or better than ±1.0% of the measured value. 6.3 Airflow Measurements. When air is used as the transfer fluid, the airflow rate shall be determined as described in Section 7 using instrumentation described in ASHRAE Standard 37, Methods of Testing for Rating Unitary Air Conditioning and Heat Pu… 6.3 Airflow Measurements. When air is used as the transfer fluid, the airflow rate shall be determined as described in Section 7 using instrumentation described in ASHRAE Standard 37, Methods of Testing for Rating Unitary Air Conditioning and Heat Pu… 6.4 Pressure Measurements 6.4 Pressure Measurements 6.5 Time and Mass Measurements. Time measurements and mass measurements shall be made to an accuracy of ±0.20% for calibration purposes. 6.5 Time and Mass Measurements. Time measurements and mass measurements shall be made to an accuracy of ±0.20% for calibration purposes. 7. APPARATUS AND METHOD OF TESTING 7. APPARATUS AND METHOD OF TESTING 7.1 Transfer Fluid. The same transfer fluid shall be used in testing the thermal storage device as will be used in operating the storage device in the field. 7.1 Transfer Fluid. The same transfer fluid shall be used in testing the thermal storage device as will be used in operating the storage device in the field. 7.2 Air as the Transfer Fluid 7.2 Air as the Transfer Fluid
6	Figure 1 Positions of instrumentation relative to the thermal storage device for devices using air as the transfer fluid. Figure 1 Positions of instrumentation relative to the thermal storage device for devices using air as the transfer fluid. Figure 2 Typical locations of temperature-difference thermocouple junctions in rectangular air ducts. Figure 2 Typical locations of temperature-difference thermocouple junctions in rectangular air ducts.
7	Figure 3 Airflow-measuring apparatus. Figure 3 Airflow-measuring apparatus. Figure 4 Positions of instrumentation relative to the thermal storage device for devices using a liquid as the transfer fluid. Figure 4 Positions of instrumentation relative to the thermal storage device for devices using a liquid as the transfer fluid. 7.3 Liquid as the Transfer Fluid 7.3 Liquid as the Transfer Fluid
8	8. TEST PROCEDURES 8. TEST PROCEDURES 8.1 Theoretical Storage Capacitance. The theoretical storage capacitance (TSC) of a thermal energy storage device shall be calculated by adding the products of the mass and specific heat of all components of the storage device inside the insulation. 8.1 Theoretical Storage Capacitance. The theoretical storage capacitance (TSC) of a thermal energy storage device shall be calculated by adding the products of the mass and specific heat of all components of the storage device inside the insulation. 8.2 Test Requirements. All of the tests require that the temperature of the storage medium, prior to the start of data taking, be uniform at the desired temperature and that there exists steady flow of the transfer fluid through the storage system du… 8.2 Test Requirements. All of the tests require that the temperature of the storage medium, prior to the start of data taking, be uniform at the desired temperature and that there exists steady flow of the transfer fluid through the storage system du… 8.3 Tests to Be Performed. The tests to be performed on a thermal storage device are 8.3 Tests to Be Performed. The tests to be performed on a thermal storage device are 8.4 Heat Loss Test. The volumetric flow rate of the heat transfer fluid shall be adjusted to qmax as specified by the supplier of the storage device. The storage device shall be charged to a uniform temperature (as defined by R £ 0.005) with an inle… 8.4 Heat Loss Test. The volumetric flow rate of the heat transfer fluid shall be adjusted to qmax as specified by the supplier of the storage device. The storage device shall be charged to a uniform temperature (as defined by R £ 0.005) with an inle…
9	8.5 Charge and Discharge Tests 8.5 Charge and Discharge Tests TABLE 1 Required Flow Rates and Inlet Temperatures TABLE 1 Required Flow Rates and Inlet Temperatures
10	8.6 Measurement of Ambient Air Temperature. The ambient air temperature, Ta, shall be the arithmetic average temperature of the test area, determined by four calibrated temperature sensors. ASHRAE Standard 41.11 shall be followed in making these meas… 8.6 Measurement of Ambient Air Temperature. The ambient air temperature, Ta, shall be the arithmetic average temperature of the test area, determined by four calibrated temperature sensors. ASHRAE Standard 41.11 shall be followed in making these meas… 9. DATA TO BE RECORDED AND TEST REPORT 9. DATA TO BE RECORDED AND TEST REPORT 9.1 Test Data. Table 2 lists the measurements to be made during the various tests. 9.1 Test Data. Table 2 lists the measurements to be made during the various tests. 9.2 Test Report. Table 3 specifies the data to be reported in testing a thermal energy storage device. 9.2 Test Report. Table 3 specifies the data to be reported in testing a thermal energy storage device. 10. NOMENCLATURE 10. NOMENCLATURE TABLE 2 Test Data to Be Recorded TABLE 2 Test Data to Be Recorded
11	TABLE 3 Data to Be Reported TABLE 3 Data to Be Reported 11. REFERENCES 11. REFERENCES
12	Informative Annex A— MATHEMATICAL DERIVATIONS INTRODUCTION Informative Annex A— MATHEMATICAL DERIVATIONS INTRODUCTION A1. Dimensionless Variables and Parameters A1. Dimensionless Variables and Parameters A1.1 Dimensionless Temperature and Time. To be able to compare one storage device to another even though their physical parameters and sizes may be different, it is useful to define a dimensionless temperature (f) and a dimensionless time (t). They a… A1.1 Dimensionless Temperature and Time. To be able to compare one storage device to another even though their physical parameters and sizes may be different, it is useful to define a dimensionless temperature (f) and a dimensionless time (t). They a…
13	A2. Determining the Steady-State Condition A2. Determining the Steady-State Condition A3. Thermal Loss Tests A3. Thermal Loss Tests A3.1 Steady-State Method A3.1 Steady-State Method
14	A3.2 Charge and Discharge Cycle Method A3.2 Charge and Discharge Cycle Method
15	A3.3 Charge-Standby-Recharge Method A3.3 Charge-Standby-Recharge Method A4. References A4. References
16	Informative Annex B— Bibliography Informative Annex B— Bibliography

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Standard Title	ANSI/ASHRAE Standard 94.3 Method of Testing Active Sensible Thermal Energy Devices Based on Thermal Performance – WITHDRAWN
Published Code	ASHRAE
Publication Date	2010
Pages Count	18

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