Heat Exchanger

There are two types of heat exchanger reports: single and dual stream:

The single stream heat exchanger report uses calculations with one region. By this method, one stream is assumed to have a uniform temperature and the other stream is modeled by specifying the heat exchanger enthalpy source.
The dual stream heat exchanger report uses calculations with an interface between two regions. This technique involves the heat exchange between a cold fluid stream and a hot fluid stream. These streams are modeled as two different physics continua (each having different material properties).
For this report, the monitor values Mass Flux, Inlet Temperature, Outlet Temperature, and Pressure Drop may be selected for both the regions that comprise the dual stream heat exchanger.

This report also gives efficiency for the two streams as follows:

Figure 1. EQUATION_DISPLAY

${e f f}_{c o l d} = \frac{(T_{c o l d - o u t} - T_{c o l d - i n})}{(T_{h o t - i n} - T_{c o l d - i n})}$
(433)
Figure 2. EQUATION_DISPLAY

${e f f}_{h o t} = \frac{(T_{h o t - i n} - T_{h o t - o u t})}{(T_{h o t - i n} - T_{c o l d - i n})}$
(434)

Each of these reports is represented in the simulation tree by a node, which has its own properties but is subject to the report node’s pop-up menu.

Heat Exchanger Report Properties


Heat Exchanger	Selects a region (single stream) or interface (dual stream) from a drop-down list of applicable objects in the simulation.
Monitor Units	Units in which the Monitor Value is monitored and plotted, but the preferred units are used in the report output for the heat transfer rate, pressures and temperatures.
Monitor Value	Selects the quantity to be monitored.
	Mass Flux	Selects mass flux $\dot{m}$ .
	Heat Transfer	Selects heat transfer $Q$ .
	Inlet Temperature	Selects inlet temperature $T_{i n}$ .
	Outlet Temperature	Selects outlet temperature $T_{o u t}$ .
	Pressure Drop	Selects pressure drop $Δ p$ .
Monitor Contact	The contact parts listed for the heat exchanger interface under Geometry > Contacts. (Dual stream only.)
Region-0 Downstream Parts	Downstream parts of the Region-0 stream, one of the two regions that constitute the heat exchanger interface. (Dual stream only.)
Region-1 Downstream Parts	Downstream parts of the Region-1 stream, one of the two regions that constitute the heat exchanger interface. (Dual stream only.)

Representation	Selects a representation. Additional selections appear as representations that are added to the simulation.