blockDryCooler

Model for thermal performance of dry cooling tower

Extends from Modelica.Blocks.Icons.Block (Basic graphical layout of input/output block).

Information

Model for the thermal performance of the dry cooling tower.

The air mass flow rate is computed as

ṁ_air = y ṁ_air,nominal

This air flow rate is supplied to both the heat transfer coefficient block Buildings.Fluid.HeatExchangers.BaseClasses.HADryCoil (instance hA) and to Buildings.Fluid.HeatExchangers.CoolingTowers.BaseClasses.DryCoolerUA (instance dryCoolerUA), which computes the overall thermal conductance UA, the effectiveness ε, and the heat flow rate Q̇.

Type	Name	Default	Description
Buildings.Fluid.HeatExchangers.CoolingTowers.Data.DryCooler.Generic	dat		Performance data record
Modelica.Units.SI.ThermalConductance	UA_nominal	UA.UA_nominal	Thermal conductance at nominal flow, used to compute heat capacity
Real	eps_nominal	UA.eps_nominal	Nominal heat transfer effectiveness
Real	NTU_nominal	UA.NTU_nominal	Nominal number of transfer units
Nominal condition
Modelica.Units.SI.MassFlowRate	m_flow_nominal		Nominal mass flow rate of water
Fan
Modelica.Units.SI.MassFlowRate	mAir_flow_nominal	m_flow_nominal/dat.ratCooAir_nominal	Nominal mass flow rate of air
Real	yMin		Minimum control signal until fan is switched off (used for smoothing between forced and free convection regime)

Type	Name	Description
Modelica.Blocks.Interfaces.RealInput	y	Fan control signal
Modelica.Blocks.Interfaces.RealInput	m_flow	Cooling fluid mass flow rate
Modelica.Blocks.Interfaces.RealInput	TCooIn	Inlet water temperature
Modelica.Blocks.Interfaces.RealInput	TDryBul	Entering air dry bulb temperature
Modelica.Blocks.Interfaces.RealOutput	Q_flow	Heat removed from water

Name	Description
Medium	Medium in the component