ASHRAE Standard 200 2018

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ASHRAE Standard 200-2018 — Methods of Testing Chilled Beams (ANSI Approved)

Published By	Publication Date	Number of Pages
ASHRAE	2018	36

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Description

ASHRAE Standard 200 defines laboratory methods of testing chilled beams todetermine performance, specifying instrumentation, facilities, installation methods, and procedures for determining the performance of chilled beams.Changes from the 2015 edition of the standard include clarifications/revisions to the acoustical testing requirements, as well as verified test methods for induction ratio and water pressure drop.

PDF Catalog

PDF Pages	PDF Title
1	ANSI/ASHRAE Standard 200-2018
3	CONTENTS
4	1. PURPOSE 1.1 To define laboratory methods of testing chilled beams to determine performance. 2. SCOPE 2.1 Defines laboratory methods of testing chilled beams to determine performance. 2.2 Specifies test instrumentation, facilities, installation methods, and procedures for determining the performance of chilled beams. 3. DEFINITIONS AND SYMBOLS 3.1 Definitions 3.2 Symbols Table 1 Octave Band Center Frequencies
5	4. INSTRUMENTATION AND FACILITIES 4.1 All instruments shall have been calibrated in the range of use within the past year to a NIST-traceable or equivalent organization standard. 4.2 Temperature and moist air properties measuring instruments shall meet the requirements of ASHRAE Standard 41.11 and ASHRAE Standard 41.62 and the following subsections. 4.3 Pressure measuring instruments shall meet the requirements of ANSI/ASHRAE Standard 41.33 and the requirements of Section 4.3.1.
6	4.4 Primary Airflow Measurement 4.5 Water Flow Rate Measurement 4.6 Sound Power Measurement 4.7 Discharge Air Jet Performance Measurement. Used for throw measurements (see Section 5.7.5). 4.8 Water-Side Cooling Capacity Measurement
7	5. TEST METHODS 5.1 Acoustics
8	Figure 1 Acoustical test setup for determining combined discharge and radiated sound. 5.2 Physical Requirements for Water-Side Cooling Capacity 5.3 Test Setup Requirements
10	Figure 2 One-way discharge installation. Figure 3 Two-way discharge installation.
11	5.4 Testing Requirements Figure 4 Four-way discharge installation. Figure 5 Temperature sensor locations.
12	5.5 Test Procedures 5.6 Definition of Steady State 5.7 Calculations and Expression of Results 6. REPORTING
13	Figure 6 Example best-fit curve for water-side cooling capacity vs. three primary airflow rates (I-P). Figure 7 Example of best-fit curve for water-side cooling capacity vs. three temperature differentials (I-P).
14	Figure 8 Example of best-fit curve for water-side cooling capacity vs. three water flow rates (I-P). Figure 9 Example best-fit curve for water-side cooling capacity vs. three primary airflow rates (SI).
15	Figure 10 Example of best-fit curve for water-side cooling capacity vs. three temperature differentials (SI). Figure 11 Example of best-fit curve for water-side cooling capacity vs. three water flow rates (SI).
16	7. NORMATIVE REFERENCES
17	INFORMATIVE APPENDIX A: GOVERNING EQUATIONS FOR CHILLED BEAMS A1. TOTAL COOLING CAPACITY A2. COIL-COOLING CAPACITY A3. COIL HEAT-TRANSFER COEFFICIENT
18	Figure A-1 Typical chilled-beam functional diagram. Figure A-2 Induced airflow measurement using zero-pressure differential method. A4. MEASURING INDUCTION COEFFICIENT, Kin
19	A5. MEASUREMENT OF THE INDUCTION COEFFICIENT BY THE ZERO-PRESSURE METHOD
20	INFORMATIVE APPENDIX B: PRIMARY AIRFLOW MEASUREMENT B1. PRIMARY AIRFLOW MEASUREMENT B1.1 Airflow rate shall be measured in accordance with ASHRAE Standard 41.2H-1. Alternative airflow rate measurement methods may be used if calibrated with a certified standard to the required accuracy. B2. ORIFICE METERS B2.1 Orifice meters shall be constructed in accordance with ASME Performance Test Code 19.5H-2 and shall be sized for a throat velocity not less than 3000 fpm (15 m/s) or more than 7000 fpm (35 m/s). B3. MULTIPLE NOZZLE CHAMBER METER B3.1 Multiple nozzle chamber meters shall be constructed in accordance with ANSI/ASHRAE Standard 51 (ANSI/AMCA 210)H-3. B4. VANE ANEMOMETER FLOW MEASURING SYSTEM B4.1 One method of accurately measuring airflow rates with low pressure drop is to use a vane anemometer that has been calibrated in situ against a certified standard to the required accuracy. B4.2 The vane anemometer flow measuring system consists of a straight length of duct with a propeller anemometer, humidity measuring instruments, and a temperature probe inside (see Figure B-1). The duct has five diameters of inlet length, a flow str… B4.3 Vane Anemometer Flowmeter Calibration Procedure
21	Figure B-1 Vane anemometer flow measuring system. Figure B-2 Vane anemometer flowmeter calibration procedure. Figure B-3 Correct positioning of anemometer in flowmeter.
22	INFORMATIVE APPENDIX C: ELECTRIC HEATED PERSON SIMULATORS C1. PURPOSE C2. SIMULATOR CONSTRUCTION Figure C-1 Heat load simulator. C3. TEST ROOM PLACEMENT OF SIMULATORS
23	Figure C-2 Example of a constructed heat load simulator. Figure C-4 Plan view of test room and heat load simulator placement. Figure C-3 Interior example of a heat load simulator. C4. INTERNAL HEAT LOAD SELECTION Table C-1 Suggested Supply Power for Various Simulations
24	INFORMATIVE APPENDIX D: RADIANT SHIELDED TEMPERATURE SENSOR D1. PURPOSE D2. DESIGN CONSIDERATIONS Figure D-1 Example of cylindrical design. Figure D-2 View angle.
25	NORMATIVE APPENDIX E: LABORATORY MEASUREMENT OF INDUCED AIRFLOW RATES AND CALCULATION OF INDUCTION RATIOS E1. MEASUREMENT BY THE INDUCTION VELOCITY METHOD E1.1 Induced Air Velocity Measurement E1.2 Test Sample Qualification and Locations E1.3 Measurement Requirements and Locations E1.4 Testing Requirements E1.5 Test Procedures E1.6 Calculation and Expression of Results
26	Figure E-1 Velocity sensor measurement locations. Figure E-2 Temperature sensor locations for measuring ti2. E2. MEASUREMENT BY THE THERMAL BALANCE METHOD E2.1 Temperature Measurement of Induced Air after Leaving the Cooling Coil
27	E2.2 Measurement Requirements and Locations E2.3 Testing Requirements E2.4 Test Procedures E2.5 Calculation and Expression of Results
28	NORMATIVE APPENDIX F: METHOD OF TESTING WATER PRESSURE DROP F1. METHOD OF TESTING WATER PRESSURE DROP F1.1 The temperatures and pressures of water entering and leaving the chilled beam shall be measured by the apparatus as illustrated in Figure F-1. The connecting piping shall be the same size as the chilled-beam supply and return connections. F1.2 Temperature measuring instruments shall be placed so as to measure the temperature of the water entering and leaving the beam. The liquid lines shall be insulated at and adjacent to the temperature measuring instruments. Appropriate insulation h… F1.3 Appropriate means shall be provided for determining the liquid absolute pressure entering the beam and the liquid pressure drop through the beam and measurement apparatus, as shown in Figure F-1. The piezometer rings shall be located and constru… F1.4 The pressure drop in the test measurement apparatus, including any pipe between the beam and the measuring devices, at the test flow shall be calculated and subtracted from the measurement. This piping loss shall be determined by calibration of …
29	Figure F-1 Water pressure drop measurement apparatus.
30	NORMATIVE APPENDIX G: WATER-SIDE PRESSURE DROP MEASUREMENT PROCEDURE G1. Purpose G2. Background G3. Measurement Locations G3.1 Static pressure taps may be in either the unit connections (i.e., nozzles) or in additional external piping provided for the purpose of test measurements. G3.2 If using additional external piping, the piping arrangement shall use rigid pipe and may include fittings such as elbows, reducers, or enlargers between the pressure tap locations and the unit connections. Flexible hose is prohibited between the… G3.3 Static pressure taps shall maintain the lengths of cylindrical straight pipe in the flow path adjacent to each pressure tap location as shown in Table G-1. G4. Static Pressure Taps G4.1 For design or evaluation purposes, flow resistance may be estimated by resistance coefficient K-factor calculation methods, as found in Crane Technical Paper No. 41010. Generally, manifold tubing or piping can be evaluated using the K-factor, an… G4.2 Provisions shall be made to bleed air out of the lines connected to pressure measurement devices. These provisions shall take into consideration the orientation of pressure taps and manifold connections. G5. Correction Method G5.1 The adjustment shall not exceed 10% of the measured water pressure drop. G5.2 The general form of the adjustment equations use the methods in Crane Technical Paper No. 41010. A Darcy friction factor is determined using the Swamee-Jain equation.
31	G5.3 An Excel® spreadsheet is available from AHRI for computation of the pressure drop adjustment factors. G6. Pressure Measurement Pipe Calibration G6.1 Connect the entering beam pressure measurement pipe exit (minimum straight length downstream of taps = 3 × Di or 6 in. [150 mm], whichever is greater) to the leaving beam pressure measurement pipe entrance (minimum straight length upstream of t… G6.2 The instrumentation for the test shall consist of the following: G6.3 Data to be recorded for each test run is as follows: Table G-1 Water Pressure Measurement Apparatus (SPL PMA) Design Table G-2 Example SPL PMA Sizing for 40S SS Piping
32	G6.4 Conduct the water pressure drop test with at least four different water velocities inside pressure measurement pipe covering the range of 1 to 14 ft/s (0.3 to 4.25 m/s) in approximately equally spaced velocity increments on a logarithmic scale. … G6.5 Record the test data continuously for at least 30 minutes (every 1 minute) after steady-state condition has been achieved. Average the rounds to determine each run’s test values. Wait for steady-state conditions before testing at the next wate… G6.6 Use the following input data and the AHRI spreadsheet to calculate water pressure drop through entering beam and leaving beam pressure measurement pipes at the test input conditions. G6.7 The measurement shall not exceed the calculated adjustment by more than 10%; otherwise, additional corrections shall be applied and noted. G6.8 If the pressure measurement pipes are made from a noncorroding material, and the water under test is soft, the pipe’s absolute roughness should not change as a function of time. G6.9 The laboratory shall conduct an annual calibration of the pressure measurement pipes.
33	INFORMATIVE APPENDIX H: INFORMATIVE REFERENCES
34	INFORMATIVE APPENDIX I: ADDENDA DESCRIPTION INFORMATION Table I-1 Addenda to ANSI/ASHARE Standard 200-2015