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ASHRAE 164.2 2012

ASHRAE 164.2 2012

$38.46

ASHRAE Standard 164.2-2012 Method of Test for Residential Self-Contained Humidifiers

Published By Publication Date Number of Pages
ASHRAE 2012 10
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Standard 164.2-2012 offers a method of test for capacities of residential self-contained humidifiers under a variety of conditions. This method of test provides rules for the testing of self-contained system humidifiers for residential applications and was prepared in cooperation with the Air-Conditioning, Heating, and Refrigeration Institute to utilize with ANSI/AHRI Standard 620-2004. The purpose of this standard is to provide a uniform method for testing in a laboratory environment. Although the method of test originated in ANSI/AHRI Standard 620-2004, the committee has developed this separate method of test to be used independently of the AHRI rating standard so manufacturers, specifiers, installers, and users of central system residential humidifiers can test a humidifier’s capacity under a variety of conditions with uniform results. This standard establishes a method of test for the humidification rate and power input of residential self-contained humidifiers for whole-house applications that do not require other mechanical devices and are not connected to the central heating/ventilation system. This method of test describes the test apparatus, conduct of the test, and information to be recorded. Tests covered include methods for measuring energy input, water flow rate, water temperature, and water pressure to the test humidifier.

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PDF Pages PDF Title
4 FOREWORD
1. PURPOSE
2. SCOPE
2.1 The scope of this standard covers a method of test for the humidification rate of residential self-contained humidifiers that do not require other mechanical devices and are not connected to the central heating/ventilation system.
2.2 This method of test describes the test apparatus, conduct of the test, and information to be recorded.
2.3 Tests covered include methods for measuring energy input, water flow rate, water temperature, and water pressure to the test humidifier.
3. DEFINITIONS
4. UNITS OF MEASUREMENT
4.1 Systems of Units. The International System of Units (le Système International d’Unités)2 is employed in this standard. Values shall be based on the National Institute of Standards and Technology values, which in turn are based on the fundamen…
4.2 Basic Units. The unit of length is either the metre (foot), designated m (ft), or the millimetre (inch), designated mm (in.). The unit of mass is the kilogram (pound mass), designated kg (lbm). The unit of time is the minute, designated min, or t…
4.3 Flow Rate and Velocity. The unit for the flow rate for air is litres per second (cubic feet per minute), designated L/s (cfm). The unit for the flow rate for water is kilograms per hour (pounds mass per hour), designated kg/h (lbm/h). The unit fo…
4.4 Pressure. The unit of pressure is the pascal or kilopascal (pounds per square inch, inch water gage, or the inch mercury column), designated Pa (psi, in. wg, or in. Hg). The inch mercury column shall be based on a one-inch column of mercury at 0…
4.5 Power and Energy. In this standard, the unit of power is the kilowatt, designated kW.
5. INSTRUMENTS AND METHODS OF MEASUREMENT
5.1 Pressure. Pressure at a point shall be measured on an indicator, such as a manometer, a transducer, or an oil-filled gage. The instrument that is selected for a particular measurement shall meet the requirements of this standard.
5 5.2 Airflow Rate. Airflow rate shall be determined using ANSI/ASHRAE Standard 51 or ANSI/AMCA Standard 210, Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Ratings.3
5.3 Power
5.4 Water Flow
5.5 Air Density. Air density shall be calculated from measurements of wet-bulb temperature, dry-bulb temperature, and atmospheric pressure, or any other parameters if the maximum error in the calculated density does not exceed ±0.5%.
5.6 Heat Measurements
6. EQUIPMENT AND SETUP
6.1 Setup. The suggested setup of the testing apparatus is illustrated in Figure 1.
6.2 Air Treatment Facilities. The test facility shall be provided with air treating equipment to maintain the prescribed conditions of temperature, humidity, and pressure of the air entering the humidifier test section.
6 Figure 1 Test apparatus. The scale indicates the weight of supply water for the humidifier plus the weight of water drained from the humidifier at any time. The difference between the scale reading at one time and another time is the weight of water …
6.3 Temperature Measuring Facilities. Air temperature measurements and fluid temperature measurements shall be made in accordance with the applicable provisions of ANSI/ ASHRAE Standard 41.1, Standard Method for Temperature Measurement4, except in th…
6.4 Heat Measuring Apparatus. Means shall be provided to measure the amount of water, steam, or electricity used to supply heat to a self-contained humidifier with a recirculating coil in accordance with Sections 5.3 and 5.6.
6.5 Humidifier Installation. Self-contained humidifiers shall be set up according to the manufacturer’s installation instructions.
7. OBSERVATIONS AND CONDUCT OF TEST
7.1 Test Apparatus. The test apparatus is composed of the following components:
7.2 Conditions of Test. The following conditions shall be maintained throughout the test (Section 7.2.2):
7 7.3 Performance of Test. The self-contained humidifier to be tested shall be installed in the test apparatus as described in Sections 6 and 7. The air temperature, static pressure, water pressure, and temperature required for the test shall be mainta…
8. CALCULATIONS
8.1 Calibration Correction. Calibration corrections, when required, shall be applied to individual readings before averaging or other calculations. Calibration corrections are not required if the correction is smaller than one half the maximum allowa…
8.2 Humidification Capacity. The humidification capacity in kg/h (lbm/h) is the water supply rate minus the waste water flow rate, as shown in Equation 1.
8.3 Supplemental Heat
8 9. REPORT AND RESULTS OF TEST
9.1 Report. The report of a laboratory test shall include the objective of the test, the results, the test data, and descriptions of the humidification unit, including the test setup and the setup of the test instruments as outlined in Section 7. The…
9.2 Identification. Performance sheets shall list the test humidifier unit and test setup. Sufficient details shall be listed to identify clearly the unit and setup.
10. NORMATIVE REFERENCES
ANNEX A INFORMATIVE REFERENCES

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ASHRAE 164.2 2012
$38.46