Buildings.Fluid.Storage.Ice.Validation.ExperimentNIST.BaseClasses

Base classes for validation package

Information

This package contains base classes that are used to construct the models in Buildings.Fluid.Storage.Ice.Validation.

Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).

Package Content

Name	Description
PartialChargingDischarging	Base example

Buildings.Fluid.Storage.Ice.Validation.ExperimentNIST.BaseClasses.PartialChargingDischarging

Base example

Buildings.Fluid.Storage.Ice.Validation.ExperimentNIST.BaseClasses.PartialChargingDischarging

Information

Basic model that is used to validate the tank model. The performance data record per contains the data obtained from experiments of Ojas et al., 2020, and used by Guowen et al., 2021.

Reference

Pradhan, Ojas, et.al. Development and Validation of a Simulation Testbed for the Intelligent Building Agents Laboratory (IBAL) using TRNSYS. ASHRAE Transactions 126 (2020): 458-466.

Li, Guowen, et al. An Ice Storage Tank Modelica Model: Implementation and Validation. Modelica Conferences. 2021. doi:10.3384/ecp21181177.

Extends from Modelica.Icons.Example (Icon for runnable examples).

Parameters

Type	Name	Default	Description
String	fileName		Calibration data file
Real	SOC_start	0.90996030	Start value of state of charge
MassFlowRate	m_flow_nominal	1	Nominal mass flow rate [kg/s]
PressureDifference	dp_nominal	100000	Pressure difference [Pa]
Generic	per	per(mIce_max=2846.35, coeCha...	Performance curve obtained from onsite experiment

Modelica definition

partial model PartialChargingDischarging "Base example" extends Modelica.Icons.Example; package Medium = Buildings.Media.Antifreeze.PropyleneGlycolWater ( property_T=293.15, X_a=0.30); parameter String fileName "Calibration data file"; parameter Real SOC_start=0.90996030 "Start value of state of charge"; parameter Modelica.Units.SI.MassFlowRate m_flow_nominal=1 "Nominal mass flow rate"; parameter Modelica.Units.SI.PressureDifference dp_nominal=100000 "Pressure difference"; parameter Buildings.Fluid.Storage.Ice.Data.Tank.Generic per( mIce_max = 2846.35, coeCha={1.76953858E-04,0,0,0,0,0}, dtCha=10, coeDisCha={5.54E-05,-1.45679E-04,9.28E-05,1.126122E-03,-1.1012E-03, 3.00544E-04}, dtDisCha=10) "Performance curve obtained from onsite experiment"; Buildings.Fluid.Storage.Ice.ControlledTank iceTan( redeclare package Medium = Medium, m_flow_nominal=m_flow_nominal, dp_nominal=dp_nominal, SOC_start=SOC_start, per=per, energyDynamicsHex=Modelica.Fluid.Types.Dynamics.FixedInitial) "Ice tank"; Buildings.Fluid.Sources.MassFlowSource_T sou( redeclare package Medium = Medium, use_m_flow_in=true, use_T_in=true, nPorts=1) "Mass flow source"; Buildings.Fluid.Sources.Boundary_pT bou( redeclare package Medium = Medium, nPorts=1) "Pressure source"; Buildings.Fluid.FixedResistances.PressureDrop res( redeclare package Medium = Medium, m_flow_nominal=m_flow_nominal, dp_nominal=500) "Flow resistance"; Modelica.Blocks.Sources.CombiTimeTable dat( tableOnFile=true, tableName="tab", columns=2:5, fileName=fileName) "Flowrate measurements"; Modelica.Thermal.HeatTransfer.Celsius.ToKelvin TIn "Conversion from Celsius to Kelvin"; Modelica.Thermal.HeatTransfer.Celsius.ToKelvin TOutSet "Outlet temperature in Kelvin"; Modelica.Blocks.Math.Add TSet "Temperature setpoint"; Modelica.Blocks.Sources.Constant offSet(k=0) "An offset for setpoint control"; Sensors.TemperatureTwoPort TOut( redeclare package Medium = Medium, allowFlowReversal=false, m_flow_nominal=m_flow_nominal, tau=0) "Tank outlet temperature"; equation connect(sou.ports[1], iceTan.port_a); connect(res.port_b, bou.ports[1]); connect(dat.y[3], sou.m_flow_in); connect(dat.y[1], TIn.Celsius); connect(TIn.Kelvin, sou.T_in); connect(dat.y[2], TOutSet.Celsius); connect(TOutSet.Kelvin, TSet.u1); connect(offSet.y, TSet.u2); connect(TSet.y, iceTan.TSet); connect(iceTan.port_b, TOut.port_a); connect(TOut.port_b, res.port_a); end PartialChargingDischarging;