🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
ASHRAE Standard 212 2019

ASHRAE Standard 212 2019

$38.46

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

Published By Publication Date Number of Pages
ASHRAE 2019 32
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

None

PDF Catalog

PDF Pages PDF Title
1 ANSI/ASHRAE Standard 212-2019
3 CONTENTS
4 FOREWORD
1. PURPOSE
2. SCOPE
3. DEFINITIONS
4. NOMENCLATURE
6 5. MEASUREMENT PROTOCOL
5.1 Input Data Requirements
5.2 Methods of Testing
7 Table 5-1 Precooler Description
Table 5-2 Test-Unit Description
8 Figure 5-1 Room air enthalpy test method arrangement.
9 Table 5-3 Measurement Accuracies, Test Conditions, and Test Tolerances
10 Table 5-4 Flow Resistance Data 105°F (40.6°C)
Table 5-5 Flow Resistance Characterization 105°F (40.6°C)
5.3 Performance-Test Data
11 Table 5-6 Equipment Configuration 1A: Baseline Cooling Equipment Data without Precooler
12 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°F/73°F (40.6°C/22.8°C)
6. CALCULATION PROCEDURES
13 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…
14 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
15 Table 7-1 Test Report
16 INFORMATIVE APPENDIX A: WATER-USE EFFECTIVENESS
Figure A-1 Illustration of the assumptions behind the process used to calculate the water-use effectiveness.
17 INFORMATIVE APPENDIX B: ADDITIONAL WATER USE
B1. Scale Build-up
Figure B-1 Quick reference chart for evaporative cooler water quality.
18 INFORMATIVE APPENDIX C: WATER CARRYOVER
19 INFORMATIVE APPENDIX D: CONDENSER GEOMETRY EFFECTS
20 INFORMATIVE APPENDIX E: CONDENSER EXAMPLE CALCULATION

Related products

ASHRAE Standard 212 2019
$38.46