Propellant Properties Comparison

Propellant Properties Comparison
Propellant Properties Comparison	PRISM v1.1.16
by: Scooter Rho	July 01, 2018

When designing the tanks for a liquid propellant system, it is necessary to know the worst-case propellant density, (usually max storage temperature) so that the tanks can be large enough at that condition.

There are a number ways to get propellant density in PRISM.

correlations from literature in the routind dsat
extrapolation from corresponding states (i.e. critical properties) in prolib
the open source code CoolProp via EngCoolProp
the commercial code Refprop

Each of the above approaches is constrained to just those propellants included in each of the models.

The graph below uses dsat to calculate saturated density for:

IRFNA
N2O4
MON15
MON25
Water (H2O)
MMH

Notice that the freezing point is shown for each propellant.

dsat continues to estimate density for the frozen condition, even though it is outside the limits of the correlations. The code uses an anchored method of corresponding states to do the extrapolation.

If the stage is not intended to experience frozen propellants, that constraint must be imposed by the user.

Mass Summary
System: Propellant Properties Comparison	6.000	lbm	Total
Name	Mass	Units	Type
PROPELLANT
Inhibited Red Fuming Nitric Acid	1.000	lbm	propellant
MON-25	1.000	lbm	propellant
MON15	1.000	lbm	propellant
Monomethyl Hydrazine	1.000	lbm	propellant
Nitrogen Tetroxide	1.000	lbm	propellant
WATER	1.000	lbm	propellant

Design Variable Summary

Design Variables (nominal values)
Name	Value	Units	Description
Temperature	527.67	degR	Temperature of fluid (degR)

Result Variables
Name	Value	Units	Description	Constrain	Limit
H2O	63.8208	lbm/cuft	Density of Water (lbm/cuft)		---
IRFNA	99.3944	lbm/cuft	Density of Inhibited Red Fuming Nitric Acid (lbm/cuft)		---
MMH	54.6196	lbm/cuft	Density of Monomethyl Hydrazine (lbm/cuft)		---
MON15	90.6112	lbm/cuft	Density of MON-15 (lbm/cuft)		---
MON25	86.8308	lbm/cuft	Density of MON-25 (lbm/cuft)		---
N2O4	90.1699	lbm/cuft	Density of Nitrogen Tetroxide (lbm/cuft)		---
sysMass	0	lbm	Total System Mass (lbm)		---

Incompressible Liquid: Inhibited Red Fuming Nitric Acid

mass = 1.000 lbm type = propellant

IRFNA Properties Calculated by Method of Corresponding States

==== INPUT ====
Name	Value	Units
T	= 527.7	degR
P	= 1000.0	psia
Tref	= 530.0	degR
Tnbp	= 608.0	degR
Tcrit	= 980.0	degR
Pref	= 14.7	psia
Pcrit	= 1286.0	psia
WtMol	= 59.7
RhoRef	= 0.056	lb/cuin
ViscRefFT	= 6.66e-05	lb/ft-sec
CondRefFTHR	= 0.1782	BTU/ft-hr-R
CpRef	= 0.41	BTU/lbm degR

==== OUTPUT ====
Name	Value	Units
D	= 99.394	lbm/cuft
rho	= 0.0575199	lbm/cuin (1.59215 SG)
Cp	= 0.41	BTU/lbm degR
Visc	= 6.75488	[1.0E5 * lb/ft-sec]
Cond	= 0.178693	BTU/ft-hr-R
SurfTen	= 0.000144117	lbf/in
phase	= LIQUID
Pvap	= 2.13039	psia
Vcuft	= 0.0100609	cuft
Volume	= 17.3853	cuin

Incompressible Liquid: MON-25

mass = 1.000 lbm type = propellant

MON25 Properties Calculated by Method of Corresponding States

==== INPUT ====
Name	Value	Units
T	= 527.7	degR
P	= 1000.0	psia
Tref	= 530.0	degR
Tnbp	= 475.6	degR
Tcrit	= 747.0	degR
Pref	= 14.7	psia
Pcrit	= 2100.0	psia
WtMol	= 60.7
RhoRef	= 0.050139	lb/cuin
ViscRefFT	= 0.000267	lb/ft-sec
CondRefFTHR	= 0.0759456	BTU/ft-hr-R
CpRef	= 0.336	BTU/lbm degR

==== OUTPUT ====
Name	Value	Units
D	= 86.831	lbm/cuft
rho	= 0.0502493	lbm/cuin (1.3909 SG)
Cp	= 0.336	BTU/lbm degR
Visc	= 26.993	[1.0E5 * lb/ft-sec]
Cond	= 0.0762899	BTU/ft-hr-R
SurfTen	= 0.000144711	lbf/in
phase	= LIQUID
Pvap	= 59.9668	psia
Vcuft	= 0.0115166	cuft
Volume	= 19.9008	cuin

Incompressible Liquid: MON15

mass = 1.000 lbm type = propellant

MON15 Properties Calculated by Method of Corresponding States

==== INPUT ====
Name	Value	Units
T	= 527.7	degR
P	= 1000.0	psia
Tref	= 530.0	degR
Tnbp	= 500.0	degR
Tcrit	= 759.0	degR
Pref	= 14.7	psia
Pcrit	= 1836.0	psia
WtMol	= 73.2
RhoRef	= 0.0506	lb/cuin
ViscRefFT	= 0.000267	lb/ft-sec
CondRefFTHR	= 0.0759456	BTU/ft-hr-R
CpRef	= 0.353	BTU/lbm degR

==== OUTPUT ====
Name	Value	Units
D	= 90.611	lbm/cuft
rho	= 0.052437	lbm/cuin (1.45145 SG)
Cp	= 0.353	BTU/lbm degR
Visc	= 26.9769	[1.0E5 * lb/ft-sec]
Cond	= 0.0762612	BTU/ft-hr-R
SurfTen	= 0.000144401	lbf/in
phase	= LIQUID
Pvap	= 32.2177	psia
Vcuft	= 0.0110362	cuft
Volume	= 19.0705	cuin

Incompressible Liquid: Monomethyl Hydrazine

mass = 1.000 lbm type = propellant

MMH Properties Calculated by Method of Corresponding States

==== INPUT ====
Name	Value	Units
T	= 527.7	degR
P	= 1000.0	psia
Tref	= 530.0	degR
Tnbp	= 650.0	degR
Tcrit	= 1053.0	degR
Pref	= 14.7	psia
Pcrit	= 1195.0	psia
WtMol	= 46.07
RhoRef	= 0.0315646	lb/cuin
ViscRefFT	= 0.0005304	lb/ft-sec
CondRefFTHR	= 0.143294	BTU/ft-hr-R
CpRef	= 0.7	BTU/lbm degR

==== OUTPUT ====
Name	Value	Units
D	= 54.620	lbm/cuft
rho	= 0.0316086	lbm/cuin (0.874922 SG)
Cp	= 0.7	BTU/lbm degR
Visc	= 53.0342	[1.0E5 * lb/ft-sec]
Cond	= 0.143286	BTU/ft-hr-R
SurfTen	= 0.000194159	lbf/in
phase	= LIQUID
Pvap	= 0.816501	psia
Vcuft	= 0.0183084	cuft
Volume	= 31.637	cuin

Incompressible Liquid: Nitrogen Tetroxide

mass = 1.000 lbm type = propellant

N2O4 Properties Calculated by Method of Corresponding States

==== INPUT ====
Name	Value	Units
T	= 527.7	degR
P	= 1000.0	psia
Tref	= 530.0	degR
Tnbp	= 529.8	degR
Tcrit	= 776.5	degR
Pref	= 14.7	psia
Pcrit	= 1440.0	psia
WtMol	= 92.016
RhoRef	= 0.0520758	lb/cuin
ViscRefFT	= 0.0002664	lb/ft-sec
CondRefFTHR	= 0.0759456	BTU/ft-hr-R
CpRef	= 0.378	BTU/lbm degR

==== OUTPUT ====
Name	Value	Units
D	= 90.170	lbm/cuft
rho	= 0.0521816	lbm/cuin (1.44438 SG)
Cp	= 0.378	BTU/lbm degR
Visc	= 26.9024	[1.0E5 * lb/ft-sec]
Cond	= 0.0762237	BTU/ft-hr-R
SurfTen	= 0.000143994	lbf/in
phase	= LIQUID
Pvap	= 13.806	psia
Vcuft	= 0.0110902	cuft
Volume	= 19.1638	cuin

Incompressible Liquid: WATER

mass = 1.000 lbm type = propellant

WATER Properties Calculated by Method of Corresponding States

==== INPUT ====
Name	Value	Units
T	= 527.7	degR
P	= 1000.0	psia
Tref	= 530.0	degR
Tnbp	= 671.6	degR
Tcrit	= 1164.8	degR
Pref	= 14.7	psia
Pcrit	= 3200.0	psia
WtMol	= 18.015
RhoRef	= 0.03605	lb/cuin
ViscRefFT	= 0.000652272	lb/ft-sec
CondRefFTHR	= 0.347328	BTU/ft-hr-R
CpRef	= 0.99981	BTU/lbm degR

==== OUTPUT ====
Name	Value	Units
D	= 63.821	lbm/cuft
rho	= 0.0369333	lbm/cuin (1.02231 SG)
Cp	= 0.99981	BTU/lbm degR
Visc	= 66.5107	[1.0E5 * lb/ft-sec]
Cond	= 0.348063	BTU/ft-hr-R
SurfTen	= 0.000415781	lbf/in
phase	= LIQUID
Pvap	= 0.324841	psia
Vcuft	= 0.0156689	cuft
Volume	= 27.0758	cuin

(PRISM) PaRametrIc System Model
PRISM v1.1.16
contact: C. Taylor, cet@appliedpython.com