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| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 1<\/td>\n | ANSI\/ASHRAE Standard 212-2019 <\/td>\n<\/tr>\n | ||||||
| 3<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | FOREWORD 1. PURPOSE 2. SCOPE 3. DEFINITIONS 4. NOMENCLATURE <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | 5. MEASUREMENT PROTOCOL 5.1 Input Data Requirements 5.2 Methods of Testing <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Table 5-1 Precooler Description Table 5-2 Test-Unit Description <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | Figure 5-1 Room air enthalpy test method arrangement. <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Table 5-3 Measurement Accuracies, Test Conditions, and Test Tolerances <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | Table 5-4 Flow Resistance Data 105\u00b0F (40.6\u00b0C) Table 5-5 Flow Resistance Characterization 105\u00b0F (40.6\u00b0C) 5.3 Performance-Test Data <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Table 5-6 Equipment Configuration 1A: Baseline Cooling Equipment Data without Precooler <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Table 5-7 Equipment Configuration 2: Cooling Equipment Data with Dry Evaporative Precooler Installed Table 5-8 Equipment Configuration 3A: Cooling Equipment Data with Wet Evaporative Precooler Installed Table 5-9 Equipment Configuration 3B: Cooling Equipment Data with Wet Evaporative Precooler Installed and Operated at Table 5-6 Mass Flow Rates at 105\u00b0F\/73\u00b0F (40.6\u00b0C\/22.8\u00b0C) 6. CALCULATION PROCEDURES <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 6.1 Performance Curves for Baseline Cooling Equipment. The COP of the base unit as a function of condenser-air dry- bulb temperature under steady-state evaporator conditions shall be characterized using a quadratic relationship between condenser-air … 6.2 Evaporative Effectiveness. The equivalent average dry- bulb temperature leaving the precooler () for each wet-media test point is calculated by solving for the temperature point on the appropriate baseline COP curve calculated in Section 6.1 that… Figure 6-1 Diagram of equivalent dry-bulb temperature calculation from baseline quadratic fit. 6.3 Water-Use Effectiveness. Water use effectiveness is the percentage of water that is used for precooling divided by the total water supplied to the precooler during testing. This effectiveness does not include any maintenance water use for recircu… 6.4 Equipment Performance Indicators. The impact of the precooler on equipment performance shall be reported based on the measured evaporative effectiveness at each test condition, combined with a generic equipment performance characterization at 67… <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Table 6-1 Baseline Data-Fit Coefficient Summary 6.5 Impacts of Dry Equipment Configuration on Performance. The impacts of the dry precooler equipment on power draw, capacity, and COP of the cooling equipment shall be calculated for the actual cooling equipment being tested using the following equa… 6.6 Precooler Face Velocity. The velocity of the air passing through the precooler shall be calculated based on the following equation: 6.7 Standard Airflow Rate. The inlet airflow is adjusted to standard conditions by a ratio of the inlet density to standard air density (0.075 lbm\/ft3 [1.204 kg\/m3]): 7. TEST REPORT 8. REFERENCES <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Table 7-1 Test Report <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | INFORMATIVE APPENDIX A: WATER-USE EFFECTIVENESS Figure A-1 Illustration of the assumptions behind the process used to calculate the water-use effectiveness. <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | INFORMATIVE APPENDIX B: ADDITIONAL WATER USE B1. Scale Build-up Figure B-1 Quick reference chart for evaporative cooler water quality. <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | INFORMATIVE APPENDIX C: WATER CARRYOVER <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | INFORMATIVE APPENDIX D: CONDENSER GEOMETRY EFFECTS <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | INFORMATIVE APPENDIX E: CONDENSER EXAMPLE CALCULATION <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" ASHRAE Standard 212-2019 – Method of Test for Determining Energy Performance and Water-Use Efficiency of Add-On Evaporative Precoolers for Unitary Air-Conditioning Equipment<\/b><\/p>\n |