This standard applies to measuring mass flow rates for refrigerants and refrigerant/lubricant mixtures using calorimeters in laboratories. This standard applies where the entire flow stream of the refrigerant or the refrigerant/lubricant mixture enters the calorimeter as a subcooled liquid and leaves as a superheated vapor (evaporator type). This standard applies where the entire flow stream of the refrigerant or the refrigerant/lubricant mixture enters the calorimeter as a superheated vapor and leaves as a subcooled liquid (condenser type). PURPOSE This standard prescribes methods for measuring mass flow rates for refrigerants and refrigerant/lubricant mixtures using calorimeters.
ASHRAE 41.9-2018 history
2024ASHRAE 41.9-2021 Standard 41.9-2021 -- Standard Methods for Refrigerant Mass Flow Measurements Using Caloriemeters (ANSI Approved)
2018ASHRAE 41.9-2018 Standard Methods for Refrigerant Mass Flow Measurements Using Calorimeters
2011ASHRAE 41.9-2011 Standard Methods for Volatile-Refrigerant Mass Flow Measurements Using Calorimeters
2000ASHRAE 41.9-2000 Calorimeter Test Methods for Mass Flow Measurements of Volatile Refrigerants
1998ASHRAE 4199-1998 Heat Transfer in Composite Walls: A Practical Two-Dimensional Thermal Circuit Method
1988ASHRAE 41.9-1988 Standard Calorimeter Test Method for Flow Measurement of a Volatile Refrigerant