model BoilerTableEfficiencyCurves "Boilers with efficiency curves specified by look-up table" extends Modelica.Icons.Example; package Medium = Buildings.Media.Water "Medium model"; parameter Buildings.Fluid.Boilers.Data.Lochinvar.Crest.FBdash2501 per "Record containing a table that describes the efficiency curves"; Buildings.Fluid.Sources.Boundary_pT sin( redeclare package Medium = Medium, nPorts=3, p(displayUnit="Pa") = 300000, T=sou.T) "Sink"; Buildings.Fluid.Sources.Boundary_pT sou( redeclare package Medium = Medium, p=300000 + per.dp_nominal, use_T_in=true, nPorts=3) "Source"; Buildings.Fluid.Boilers.BoilerTable boi1( redeclare package Medium = Medium, energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, from_dp=true, T_start=293.15, per=per) "Boiler 1 set at 5% firing rate"; Buildings.HeatTransfer.Sources.FixedTemperature TAmb1(T=288.15) "Ambient temperature in boiler room"; Buildings.Fluid.Boilers.BoilerTable boi2( redeclare package Medium = Medium, energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, from_dp=true, T_start=293.15, per=per) "Boiler 2 set at 50% firing rate"; Buildings.HeatTransfer.Sources.FixedTemperature TAmb2(T=288.15) "Ambient temperature in boiler room"; Buildings.Fluid.Boilers.BoilerTable boi3( redeclare package Medium = Medium, energyDynamics=Modelica.Fluid.Types.Dynamics.SteadyState, from_dp=true, T_start=293.15, per=per) "Boiler 3 set at 100% firing rate"; HeatTransfer.Sources.FixedTemperature TAmb3(T=288.15) "Ambient temperature in boiler room"; Modelica.Blocks.Sources.Constant y1(k=0.05) "Setting the firing rate at constant 5%"; Modelica.Blocks.Sources.Constant y2(k=0.5) "Setting the firing rate at constant 50%"; Modelica.Blocks.Sources.Constant y3(k=1) "Setting the firing rate at constant 100%"; Modelica.Blocks.Sources.Ramp TIn( height=per.effCur[1,end]-per.effCur[1,2], duration=3600, offset=per.effCur[1,2], y(final unit="K", displayUnit="degC")) "Ramps the T_inlet from the first to the last temperature provided by the efficiency curve table"; equation connect(TAmb1.port, boi1.heatPort); connect(TAmb2.port, boi2.heatPort); connect(boi2.port_b, sin.ports[2]); connect(boi1.port_b, sin.ports[1]); connect(TAmb3.port, boi3.heatPort); connect(boi3.port_b, sin.ports[3]); connect(boi1.port_a, sou.ports[1]); connect(boi3.port_a, sou.ports[2]); connect(boi2.port_a, sou.ports[3]); connect(y1.y, boi1.y); connect(y2.y, boi2.y); connect(y3.y, boi3.y); connect(TIn.y, sou.T_in); end BoilerTableEfficiencyCurves;