Honeywell CIU 888 Configuration Manual page 90

Part No.: 4417584_Rev12
Getting Started
Properties
Liq/Vol ratio
Molar mass
Configuration Manual
CIU 888
Description
This setting refers to Liquid to Volume Ratio.
In some tanks (pressurized) the room above
the product is filled with vapour which, in con-
densed form, would take a certain amount of
product (volume). This volume can be calcu-
lated.
Typical values for LiqVolRatio with various
products, measured at the standard ProdTRef
of 15C or 60F, are:
Ethane 293.3 Cis-Butene-2 255.9 Butane
229.5
Propene 288.3 Trans-Butene-2 248.9 ISO-
Pentane 193.7
Propane 266.7 ISO-Butene 245.0 Pentane
194.8
Butene-1 245.2 ISO-Butane 221.9
If the gas is a mixture of above products,
LiqVolRatio can easily be calculated from the
appropriate factors, according to the contribu-
tion of each gas component.
Molar weight of the gas composition.
In some tanks (pressurized) the room above
the product is filled with vapour which, in con-
densed form, would take a certain amount of
product (volume).
This volume can be calculated.
Typical values for MolarWeight (expressed in
kg/kmol) with various products, measured at
the standard ProdTRef of 15 C or 60 F, are:
Ethane 30.070
Propane 44.097
Butane 58.124
ISO-Butane 58.124
Pentane 72.151
ISO-Pentane 72.151
MolarWeight is used with the calculation of:
• LiqVap, using the molar method according to:
-ISO/TC28/SC3 N411 (molar method)
-ISO 6578
-API research Project 44
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