LPG calculator

liquefied petroleum gas - propane/butane - pipe size, heat power

online since 2007

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Additional features in download version

save/open results
print results
custom fluid properties
K factor for fittings, resistance coefficient
compressible isothermal flow
Action
Calculation setup
LPG components ratio
Liquid phase flow
Gas phase flow
Mass flow rate and heat power
LPG gas phase properties

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Calculator description

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issues and answers

LPG composition

Select volume or mass percent composition
Volume fraction %vol
Ratio of propane or butane volume to the total volume of the mixture
Mass fraction %wt
Ratio of propane or butane mass to the total mass of the mixture

Description

q liq - volume flow rate of the liquid phase
LPG flow when it is in the liquid phase, before the evaporator
q gas - volume flow rate of the gas phase at normal conditions
LPG flow when it is in the gas phase, after the evaporator
V liq - velocity of the liquid phase
The velocity of LPG when it is in a liquid phase before it evaporates
V gas - velocity of the gas phase
The velocity of LPG when it is in the gas phase, after the evaporator
D liq - pipe diameter of the liquid phase
Internal pipe diameter of the LPG line liquid phase before the evaporator
D gas - pipe diameter of the gas phase
Internal pipe diameter of the LPG line gas phase after the evaporator
ṁ - mass flow rate
LPG flow rate in terms of mass flow in the unit of time. Conserved between liquid and gas phase of LPG
P - combustion heat power
Heat power generated after the combustion of LPG. Actual heat power should be reduced for the efficiency loses
LHV_G - lower heating value - mass
The heating value of LPG mixture - energy released during the combustion of a unit of mass
p - absolute pressure of LPG gas
The pressure of the LPG after the evaporator or after the pressure control valve
T - gas temperature
The temperature needed to calculate LPG density after the evaporator or after the pressure control valve
ρ gas - gas actual density
Calculated density for entered pressure and temperature, and mixture components ratio
ρ gas_nor - gas density at normal conditions
A density of LPG mixture at normal conditions p=101325 Pa and t=00C
M -molar mass
Calculated molar mass for the selected ratio of propane and butane in the LPG mixture

Calculation setup

Select value to calculate. You should enter not selected one.
P
combustion heat power calculation
q liq/q gas/ṁ
LPG flow rate calculation
Select value to input. You should enter selected one. The other two will be calculated
mass flow rate
q liq
liquid phase flow rate
q gas
gas phase flow rate
Select value to input. You should enter selected one. The other one will be calculated. Available only if the gas is selected fluid
V liq
liquid phase velocity
D liq
liquid phase pipeline diameter
Select value to input. You should enter selected one. The other one will be calculated. Available only if the gas is selected fluid
V gas
gas phase velocity
D gas
gas phase pipeline diameter

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