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ASHRAE Standard 22 2018

ASHRAE Standard 22 2018

$34.13

ASHRAE Standard 22-2018 – Methods of Testing for Rating Liquid-Cooled Refrigerant Condensers

Published By Publication Date Number of Pages
ASHRAE 2018 20
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ASHRAE Standard 22 prescribes methods of testing the thermal performance and liquid-side pressure drop of liquid-cooled refrigerant condensers.

PDF Catalog

PDF Pages PDF Title
1 ANSI/ASHRAE Standard 22-2018
3 CONTENTS
4 FOREWORD
1. PURPOSE
2. SCOPE
3. DEFINITIONS
4. REQUIRED TEST RESULTS
4.1 In expressing test results, the following parameters shall be stated:
4.2 For all parameters listed in Section 4.1, uncertainty shall be calculated as described in Section 7.4.
5. TEST METHODS
5.1 Standard Test Methods
5 5.2 Primary Test Method
FIGURE 5.1.4 Methods of producing refrigerant flow through condenser: (a) compressor and (b) boiler.
FIGURE 5.2.1 Primary test method.
6 5.3 Confirming Test Methods
FIGURE 5.3.1 Confirming test methods.
7 6. INSTRUMENTS AND TEST APPARATUS
6.1 General
6.2 Temperature-Measuring Instruments
6.3 Pressure-Measuring Instruments
6.4 Electric-Measuring Instruments
6.5 Refrigerant Flow-Measuring Instruments
8 6.6 Cooling Liquid Flow-Measuring Instruments
6.7 Time Measurements. Time measurements shall be made with an apparatus whose minimum accuracy is within ±0.1% of the elapsed time.
6.8 Weight Measurements. Weight measurements shall be made with an apparatus whose minimum accuracy is within ±0.5% of the quantity measured.
7. TEST PROCEDURE
7.1 Apparatus Assembly
7.2 Operation and Limits
7.3 Computation of Results
9 7.4 Uncertainty Analysis for Computed Results
8. REFERENCES
10 INFORMATIVE APPENDIX A—UNCERTAINTY ANALYSIS
A1. Definitions
A2. Methodology for Uncertainty Analysis
11 A3. Development of Uncertainty Calculations for Condenser Testing
12 A4. References
13 INFORMATIVE APPENDIX B—METHOD TO COMPUTE THE ENTHALPY DIFFERENCE OF A LIQUID STREAM WHEN AN EOS-BASED FUNCTION IS NOT AVAILABLE
B1. Overview
B2. Derivation of an Estimate for Enthalpy Difference
B3. Example
14 B4. Recommendations
B5. References
FIGURE B2-1 Volume expansivity of water as reported by REFPROP.
FIGURE B2-2 Relative error in heat transfer rate associated with ignoring the pressure drop of the liquid stream for water at 89.6°F (32°C).
15 FIGURE B3-1 Density of a 30%vol propylene glycol/water solution per Table 10 in Chapter 31 of the 2009 ASHRAE Handbook—Fundamentals (I-P).
TABLE B3 Example Values for a Condenser Cooled by a Propylene Glycol Solution (Values in Bold Represent the Measurements)
16 FIGURE B3-2 Specific heat of a 30%vol propylene glycol/water solution per Table 11 in Chapter 31 of the 2009 ASHRAE Handbook—Fundamentals (I-P).
17 INFORMATIVE APPENDIX C—METHOD FOR DETERMINING THE PRESENCE OF NONCONDENSABLE GASES IN LIQUID-COOLED REFRIGERANT CONDENSERS

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ASHRAE Standard 22 2018
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