modelHeatExchangerPump

Validate the control of heat exchanger pump

Information

This example validates Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Economizers.Subsequences.HeatExchangerPump. It demonstrates the process of controlling the heat exchanger pump in the following scenarios:

At 720 seconds, the plant is enabled in waterside economizer mode. The heat exchange pump becomes enabled (yPumOn=true) and the condenser water isolation valve becomes fully open (yConWatIsoVal=1).
From 720 seconds to 2880 seconds, the pump speed is adjusted by the Trim and Respond sequence based on the speed reset requests that are generated based on the temperature difference between the chilled water return temperature upstream of the economizer and the chilled water temperature entering the heat exchanger.
At 2880 seconds, the economizer becomes disabled. Thus, the pump is disabled, and the pump speed setpoint becomes 0.

Type	Name	Description
Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Economizers.Subsequences.HeatExchangerPump	wsePum	Economizer heat exchanger pump control
Buildings.Controls.OBC.CDL.Logical.Sources.Pulse	ecoSta	Water side economizer enable/disable status
Buildings.Controls.OBC.CDL.Reals.Sources.Ramp	entWSETem	Economizer upstream chilled water temperature
Buildings.Controls.OBC.CDL.Logical.Sources.Pulse	pumOn	Pump proven on
Buildings.Controls.OBC.CDL.Reals.Sources.Ramp	entHexTem	Entering heat exchanger return chilled water temperature
Buildings.Controls.OBC.CDL.Logical.Not	not2	Plant enable
Buildings.Controls.OBC.CDL.Logical.Sources.Pulse	enaPla	Enabled plant
CDL.Logical.Sources.Constant	notInPro	Not in staging process