Expander (MF)#

The Expander (MF) block models the expansion of a multicomponent mixture flow.

Law of conservation of mass (1) :

(1)#\[\dot m_А+\dot m_В=0\]

where:

\(\dot m_A\) – mass flow rate at the input, [kg/s];

\(\dot m_В\) – mass flow rate at the outlet, [kg/s].

Law of conservation of energy (2) :

(2)#\[\phi_А + \phi_В-P=0\]

where:

\(\phi_А\) – energy flow at the input, [W];

\(\phi_B\) – output energy flow, [W];

\(P\) – power transmitted by the flow of the medium, [W].

Polytropic power (3) :

(3)#\[W_{политроп}=\dot m \cdot (-\Delta H)\cdot \eta_{политроп}\]

where:

\(\dot m\) – mass flow rate, [kg/s];

\(\Delta H\) – change in enthalpy, [W];

\(\eta_{polytrope}\) – polytropic Efficiency.

Outlet pressure (4) :

(4)#\[P_{вых}=P_{зад}\]

where:

\(P_{out}\) – pressure at the outlet of the expander, [Pa];

\(P_{set}\) – pressure specified by the user as output, [Pa].

1. Properties#

Property	Default Value	Description	Units of measurement
Outlet pressure	200000.0	-	Pa
Polytropic efficiency	0.9	-	-

Parameters	Input/Output	Description	Units of measurement	Port type
Input	Input	-	-	Multicomponent fluid
Output	Output	-	-	Multicomponent fluid

In order to see the connection capabilities of the block, you need to go to page Description of block ports