ASHRAE 41.9-2011
Standard Methods for Volatile-Refrigerant Mass Flow Measurements Using Calorimeters

Standard No.: ASHRAE 41.9-2011
Release Date: 2011
Published By: ASHRAE - American Society of Heating@ Refrigerating and Air-Conditioning Engineers@ Inc.
Status: Be replaced 2018-09
Replace By: ASHRAE 41.9-2018
Latest: ASHRAE 41.9-2021

Scope: This standard applies to the measurement of the flow of a volatile refrigerant in the following cases: a. where the entire flow stream of the volatile refrigerant enters the calorimeter as a subcooled liquid and leaves as a superheated vapor (evaporator-type)@ and b. where the entire flow stream of the volatile refrigerant enters the calorimeter as a superheated vapor and leaves as a subcooled liquid (condenser-type). This standard applies to all of the refrigerants listed in ANSI/ASHRAE Standard 34@ Designation and Safety Classification of Refrigerants.1 PURPOSE This standard provides recommended practices for measuring the mass flow rate of volatile refrigerants using calorimeters.

ASHRAE 41.9-2011 history

2024 ASHRAE 41.9-2021 Standard 41.9-2021 -- Standard Methods for Refrigerant Mass Flow Measurements Using Caloriemeters (ANSI Approved)
2018 ASHRAE 41.9-2018 Standard Methods for Refrigerant Mass Flow Measurements Using Calorimeters
2011 ASHRAE 41.9-2011 Standard Methods for Volatile-Refrigerant Mass Flow Measurements Using Calorimeters
2000 ASHRAE 41.9-2000 Calorimeter Test Methods for Mass Flow Measurements of Volatile Refrigerants
1998 ASHRAE 4199-1998 Heat Transfer in Composite Walls: A Practical Two-Dimensional Thermal Circuit Method
1988 ASHRAE 41.9-1988 Standard Calorimeter Test Method for Flow Measurement of a Volatile Refrigerant