ASHRAE Standard 22 prescribes methods of testing the thermal performance and liquid-side pressure drop of liquid-cooled refrigerant condensers.<\/p>\n
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| 1<\/td>\n | ANSI\/ASHRAE Standard 22-2018 <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | 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. <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | 5.3 Confirming Test Methods FIGURE 5.3.1 Confirming test methods. <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 6.6 Cooling Liquid Flow-Measuring Instruments 6.7 Time Measurements. Time measurements shall be made with an apparatus whose minimum accuracy is within \u00b10.1% of the elapsed time. 6.8 Weight Measurements. Weight measurements shall be made with an apparatus whose minimum accuracy is within \u00b10.5% of the quantity measured. 7. TEST PROCEDURE 7.1 Apparatus Assembly 7.2 Operation and Limits 7.3 Computation of Results <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 7.4 Uncertainty Analysis for Computed Results 8. REFERENCES <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | INFORMATIVE APPENDIX A\u2014UNCERTAINTY ANALYSIS A1. Definitions A2. Methodology for Uncertainty Analysis <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | A3. Development of Uncertainty Calculations for Condenser Testing <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | A4. References <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | INFORMATIVE APPENDIX B\u2014METHOD 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 <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 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\u00b0F (32\u00b0C). <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | FIGURE B3-1 Density of a 30%vol propylene glycol\/water solution per Table 10 in Chapter 31 of the 2009 ASHRAE Handbook\u2014Fundamentals (I-P). TABLE B3 Example Values for a Condenser Cooled by a Propylene Glycol Solution (Values in Bold Represent the Measurements) <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | FIGURE B3-2 Specific heat of a 30%vol propylene glycol\/water solution per Table 11 in Chapter 31 of the 2009 ASHRAE Handbook\u2014Fundamentals (I-P). <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | INFORMATIVE APPENDIX C\u2014METHOD FOR DETERMINING THE PRESENCE OF NONCONDENSABLE GASES IN LIQUID-COOLED REFRIGERANT CONDENSERS <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" ASHRAE Standard 22-2018 – Methods of Testing for Rating Liquid-Cooled Refrigerant Condensers<\/b><\/p>\n |