blockDryCooler

Model for thermal performance of dry cooling tower

Extends from Modelica.Blocks.Icons.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