Describes and specifies testing instruments and apparatus, laboratory test methods and procedures, test data to be recorded, calculations to be made from test data and defines terms used in testing. Specifies standard thermodynamic properties. I-P units of measurement only. Your Alert Profile lists the documents that will be monitored. If the document is revised or amended, you will be notified by email. You may delete a document from your Alert Profile at any time.
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Log In Sign Up. Samir Rabia. E-mail: orders ashrae. Fax: Telephone: worldwide or toll free for orders in US and Canada. For reprint permission, go to www. Michael Christopher Stone John E. Hagan, Sr. Reindl, Chair Steven J. Emmerich Heather L. Platt Rita M. Harrold, Vice-Chair Julie M. Ferguson David Robin James D.
Aswegan Walter T. Hedrick Dennis A. Stanke Donald M. Brundage Srinivas Katipamula Wayne H. Stoppelmoor, Jr. John A. Clark Rick A. Larson Jack H. Zarour Waller S. Clements Lawrence C. Markel Julia A. Dunlap Arsen K. Melikov James K. Vallort, CO James W. Earley, Jr. Mark P. Modera Keith I. Emerson Cyrus H. Nasseri Stephanie C. This signifies the concurrence of more than a simple majority, but not necessarily unanimity.
Consensus requires that all views and objections be considered, and that an effort be made toward their resolution. ASHRAE obtains consensus through participation of its national and international members, associated societies, and public review.
Every effort is made to balance the concerned interests on all Project Committees. In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or implied, that the product has been approved by ASHRAE. This foreword is not part of this standard. It is merely 3. A heat informative and does not contain requirements necessary exchanger, with or without extended surfaces, through which for conformance to the standard.
It has not been pro- either hot water, hot aqueous glycol solution, or steam is cir- cessed according to the ANSI requirements for a standard culated for the purpose of sensible heating of a forced-circu- and may contain material that has not been subject to lation airstream. Unresolved objec- 3. The length of a coil is the dimension of the face of the coil in the direction of the tubes exposed to the ASHRAE Standard 33 presents a method of test for use in flow of air.
See Dimension L, Figure 3. The height of the coil is the dimension cooling coils. See Dimension H, Figure 3. This method of test is used in conjunction with the 3. Note: Here and throughout this document the use of [ ] Standard 33 includes access to fluid type test data forms, signifies items evaluated in I-P units. Equilibrium, for the purpose of this a.
Describe and specify testing instruments and apparatus. Describe and specify laboratory test methods and proce- tions of variables being measured remain within stated limits dures. Describe and specify test data to be recorded. A test is the recorded group of readings of test d. Describe and specify calculations to be made from test variables taken while equilibrium is maintained and used in data. Define terms used in testing. A test run is the complete group of read- f. Specify standard thermodynamic properties.
Those observed or recorded during a sufficient period to 1. SCOPE b. Those recorded during the period of the test. Liquid-vapor mixtures used 3. A forced-circulation air-cooling or air-heating 4. Used for air heating. Single tube standard type by a difference in pressure produced by a fan or blower. Steam distributing tube type 3. A heat 4. Liquids used for air exchanger, with or without extended surfaces, through which cooling or air heating. Continuous circuit type sensible cooling plus latent cooling of a forced-circulation b.
Self-draining type airstream. Hg or in. Letter subscripts are used to further identify the letter and s symbols. The indi- used with A cated corrections shall be applied to meet the required error limits given in subsequent sections. This ensures accurate determination of the wet-bulb temperature. The two temperature measuring instruments shall be close the calibration method, then the reading positions should be together in the airstream so as to measure the same sample of so arranged that a single temperature measuring instrument is air.
The air dry-bulb temperature measuring instrument shall then readily interchanged between inlet and outlet positions be mounted upstream or to one side of the air wet-bulb tem- for every test recorded reading. This is to minimize the possi- perature measuring instrument so that its reading will not be bilities of temperature difference reading errors.
The wet-bulb wick specified. Distilled water shall be used on the wick. In such cases, the temperature measuring instruments sure drop across one or more nozzles or by measuring the shall be shielded from direct exposure in a suitable manner. Refer to 6. If equivalent Figure 6. If the throat diameter is mm [5 in. For nozzle diame- perature of the liquid is measured to within 0. A detailed description of the pitot tube is given in 6. If measuring liquid refrigerant flow, ensure that sufficient 6.
To this end, Coriolis mass flowmeters or similar meters that have very little refrigerant pressure drop are sug- 7. The airflow through this appa- 6. The air enters the intake chamber through a restricted flow rate measured: opening or openings, passes through the diffusion baffles, when required, and enters the coil under test.
When sam- a. Liquid volume flowmeter pling tubes are used, it is not necessary to restrict the b. Liquid mass flowmeter intake chamber cross-sectional area. The air then leaves the coil under test and enters an insu- perpendicular to the axis of flow to the nozzles shall be not lated mixing chamber where it passes through a mixing less than Under device.
The air then leaves the mixing chamber through a neglected. When sampling tubes are used, it is not neces- sealed against air leakage at any static pressure within the test sary to restrict the mixing chamber cross-sectional area.