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ASHRAE STD 84

Method of Testing Air-to-Air Heat/Energy Exchangers

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Organization: ASHRAE
Publication Date: 1 January 2020
Status: active
Page Count: 48
scope:

This standard prescribes the laboratory methods for testing the performance of air-to-air heat and energy exchangers. In this standard, an air-to-air heat/energy exchanger is a device to transfer heat, or heat and water vapor, from one airstream to another. The types of air-to-air heat/energy exchangers covered by this standard are as follows.

Regenerators:

a. Rotary regenerators (including heat wheels and total energy wheels)

b. Fixed-bed regenerators, including double-core regenerators, but excluding indoor fixed-bed regenerators that require connecting ductwork at Station 1 and 4 in which reversing airflows will occur in the field, and single-core fixed-bed regenerators

Exchangers with intermediate energy transfer medium arranged in a closed-loop circuit:

a. Heat pipe exchangers

b. Thermosiphon exchangers

c. Recovery loop exchangers (run-around loops)

Recuperators:

a. Fixed-plate exchangers (including sensible-only and enthalpic plates)

PURPOSE

The purpose of this standard is to

a. establish a uniform method of test for obtaining the effectiveness of air-to-air heat/energy exchangers;

b. specify the test conditions, data required, uncertainty analysis to be performed, calculations to be used, and reporting procedures for testing the performance of an air-to-air heat/energy exchanger; and

c. specify the types of test equipment for performing such tests.

Document History

ASHRAE STD 84
January 1, 2020
Method of Testing Air-to-Air Heat/Energy Exchangers
This standard prescribes the laboratory methods for testing the performance of air-to-air heat and energy exchangers. In this standard, an air-to-air heat/energy exchanger is a device to transfer...
June 22, 2013
Method of Testing Air-to-Air Heat/Energy Exchangers
FOREWORD This addendum clarifies the standard in three areas. Equation 14 is modified to clarify for which airstream the specific heat Cp is evaluated. Text near Equations 22 and 23 is rearranged...
January 26, 2013
Method of Testing Air-to-Air Heat/Energy Exchangers
This standard prescribes the methods for testing the performance of air-to-air heat/energy exchangers. In this standard, an air-to-air heat/energy exchanger is a device to transfer heat and/or water...
January 19, 2008
Method of Testing Air-to-Air Heat/Energy Exchangers
This standard prescribes methods for testing the performance of certain air-to-air heat exchangers. In this standard, an air-to-air heat exchanger is a device utilized to transfer heat from one...
January 1, 1991
Method of Testing Air-to-Air Heat Exchangers
This standard prescribes methods for testing the performance of certain air-to-air heat exchangers. In this standard, an air-to-air heat exchanger is a device utilized to transfer heat from one...

References

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