The Component Dry Cooling Tower
The Dry Cooling Tower component represents a universal model of the provision of cooling by a cooling tower working with the coolant air (cooler).
Component Template
The Component template Dry_Cooling_Tower.e-ctpl is located in the eSim component templates folder Cooling Supply.
Integration Into a Scheme
The following two figures show how to integrate the component into a scheme.
How the Component Works
The Dry Cooling Tower component reproduces the removal of heat from another process. Convection with air as cooling medium without water evaporation is the main cooling principle.
The Dry Cooling Tower component can optionally Consider the ambient temperature. An Approach can be specified if this option is activated in the Technical Input Data of the component (see following figure). The Approach is the temperature difference between the Coolant outlet temperature, which must also be specified, and the Ambient temperature, which is entered in the form of the eSim node under the tabs Settings → Reference condition. The cooling tower cannot cool below a temperature lower than the sum of the Ambient temperature and the Approach.
The Nominal cooling capacity \( \dot{Q}_{cool\ nominal} \) and either the Rated Power of the Fan \( P_{el\ nominal} \) or the Nominal EER (Energy Efficiency Ratio) must be entered in the Technical Input Data. \( EER \) is calculated according to the following formula:
\( \begin{equation} \begin{aligned} EER= \dfrac{\dot{Q}_{cool\ nominal}}{P_{el\ nominal}} \end{aligned}\end{equation}\\\).
Part Load Behavior
As with all energy converters, the Design of energy conversion (part load behavior) can be specified by a Constant efficiency in part-load or Characteristic curves.
If Constant efficiency in part-load is selected (see previous figure), the Nominal cooling capacity and either the Rated power of the Fan or the Nominal EER are used for calculation.
When selecting Enter characteristic curve (absolute values), the relationship between the Cooling power \( \dot{Q}_{cool} \) and the Electrical power \( P_{el} \) is determined by a characteristic curve \(f_{el\ abs} \) (see following figure) with the following formula:
\( \begin{equation} \begin{aligned} P_{el} = f_{el\ abs}( \dot{Q}_{cool}) \end{aligned}\end{equation} \).
When selecting Enter characteristic curve (relative to nominal power), the relationship between the Cooling Power \( \dot{Q}_{cool\ nominal} \) and the Electrical Power \( P_{el\ nominal} \) is determined by a characteristic curve \(f_{el\ rel} \).
In addition to the values given in the table, the Nominal cooling capacity \( \dot{Q}_{cool\ nominal} \) and either the Nominal driving power (Rated power of the fan) \( P_{el\ nominal} \) or the Nominal conversion ratio (Nominal EER, Energy Efficiency Ratio) must be specified (see following figure).
The part load behavior is calculated with the following formula:
\( \begin{equation} \begin{aligned} \dfrac{P_{el}}{P_{el\ nominal}} = f_{el\ nominal}\left (\dfrac{\dot{Q}_{cool}}{\dot{Q}_{cool\ nominal}} \right) \end{aligned}\end{equation}\\\).
