Component 16: Heat injection

Specifications

Connections
1	Fluid inlet
2	Fluid outlet
3	Incoming heat flow

General       User Input Values       Physics Used       Displays       Example

General

Via connection 3 a heat flow can be injected.

This heat flow can, for example, also be specified with control elements (component 12, 39, 69: controller with internal or external values) (FT = 0).

Alternatively (FT= 1, FT = -1), the temperature at output T2 can also be specified.

In the cases FT=1 and FT=-1, the delivered or required heat quantity is applied as enthalpy to the logic line.

Since negative values are permissible on this logic line at connection 3, the heat injection can also be used as heat extraction.

 

User Input Values

DP12N	Absolute pressure loss (nominal)
FMODE	Flag for calculation mode =0:  GLOBAL =1:  local off-design =-1: local design
FT	Temperature setting for outlet temperature T2 =0: T2 Calculated from heat balance =1: T2 given by the value of T2SET =-1: T2 preset from outside (via the line at port 2)
T2SET	Outlet temperature T2 in case FT=1
M1N	Mass flow (nominal)

The parameters marked in blue are reference quantities for the off-design mode. The actual off-design values refer to these quantities in the equations used.  

For more information on colour of the input fields and their descriptions see Edit Component\Specification values

For more information on design vs. off-design and nominal values see General\Accept Nominal values

 

Physics Used

Equations

All cases
	F   = (M1/M1N) ** 2 for GLOBAL = Design F= 1.0 DP12  = DP12N * F P2  = P1 – DP12                                M2  = M1                                               NCV2 = NCV1 H2 * M2  = M1*H1 + Q3    T2  = f (P2, H2)

 

Component Displays

Display Option 1

Example

Click here >> Component 16 Demo << to an example.