org.lsst.ccs.subsystem.common

Class HeatTransferChannel

java.lang.Object

org.lsst.ccs.monitor.Channel

org.lsst.ccs.monitor.DerivedChannel

org.lsst.ccs.subsystem.common.HeatTransferChannel

All Implemented Interfaces:

org.lsst.ccs.config.ConfigurationBulkChangeHandler, org.lsst.ccs.config.HasConfigurationParameterDescription, org.lsst.ccs.framework.HasLifecycle

public class HeatTransferChannel
extends org.lsst.ccs.monitor.DerivedChannel

A DerivedChannel to compute a heat transfer rate from three configurable inpu Channels: cooling fluid flow rate and inlet outlet temperatures. The formula is constant * flow * Delts-T, where the constant factor is settable, and should be a product of density, specific heat, and any units-adjusting factors.

Author:

eisner

Field Summary

Fields

Modifier and Type	Field and Description
protected String	flowChanPath
protected String	inletTChanPath
protected String	outletTChanPath

Fields inherited from class org.lsst.ccs.monitor.Channel

alarmHi, alarmHiA, alarmLo, alarmLoA, checkHi, checkLo, description, devcName, doNotPublish, doNotTrend, format, hwChan, hysteresis, limitHi, limitLo, offset, pageId, scale, subtype, type, TYPE_DIFF, TYPE_POWER, TYPE_PROD, TYPE_QUOT, TYPE_SUM, TYPE_SWITCH, TYPE_TEMP, TYPE_UNKNOWN, TYPE_VOLTS, typeI, units, warnHi, warnLo

Constructor Summary

Constructors

Constructor and Description
HeatTransferChannel()

Method Summary

Modifier and Type	Method and Description
double	evaluateDerivedValue() Evaluate heat-transfer rate.
void	setFactor(double fac) Set constant factor in evaluation formula
void	setParameterBulk(Map<String,Object> params) Set configuration parameters to new values.
void	validateBulkChange(Map<String,Object> params) Checks validity of a proposed set of ConfigurationParameters Check Reqested input Channels must exist,

Methods inherited from class org.lsst.ccs.monitor.Channel

build, convertRawValue, getConfigurationParameterDescription, getDescription, getDevice, getFormat, getGroup, getHwChan, getHysteresisLimitHi, getHysteresisLimitLo, getHysteresisWarnHi, getHysteresisWarnLo, getId, getLastMeasurement, getLimitHi, getLimitLo, getName, getPageId, getPath, getSubType, getSubTypeStr, getType, getTypeStr, getUnits, getValue, getWarnHi, getWarnLo, hasHysteresis, init, readValue

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.lsst.ccs.framework.HasLifecycle

postBuild, postInit, postShutdown, postStart, shutdown, start

Field Detail

flowChanPath

@ConfigurationParameter(name="flowChanPath",
                        category="General",
                        isFinal=true,
                        units="unitless",
                        description="path to flow-rate Channel")
protected volatile String flowChanPath

inletTChanPath

@ConfigurationParameter(name="inletTChanPath",
                        category="General",
                        isFinal=true,
                        units="unitless",
                        description="Path to inlet temperature Channel")
protected volatile String inletTChanPath

outletTChanPath

@ConfigurationParameter(name="outletTChanPath",
                        category="General",
                        isFinal=true,
                        units="unitless",
                        description="Path to outlet temperature Channel")
protected volatile String outletTChanPath

Constructor Detail

HeatTransferChannel

public HeatTransferChannel()

Method Detail

validateBulkChange

public void validateBulkChange(Map<String,Object> params)

Checks validity of a proposed set of ConfigurationParameters Check Reqested input Channels must exist,

Specified by:

validateBulkChange in interface org.lsst.ccs.config.ConfigurationBulkChangeHandler

Overrides:

validateBulkChange in class org.lsst.ccs.monitor.Channel

Parameters:

Map - of ConfigurationParameters from name to value

setParameterBulk

public void setParameterBulk(Map<String,Object> params)

Set configuration parameters to new values. Updates Channels to be used in evaluation.

Specified by:

setParameterBulk in interface org.lsst.ccs.config.ConfigurationBulkChangeHandler

Overrides:

setParameterBulk in class org.lsst.ccs.monitor.Channel

Parameters:

Map - of parameters for which a change is requested, keyed by names

setFactor

public void setFactor(double fac)

Set constant factor in evaluation formula

Parameters:

double - factor

evaluateDerivedValue

public double evaluateDerivedValue()

Evaluate heat-transfer rate.

Specified by:

evaluateDerivedValue in class org.lsst.ccs.monitor.DerivedChannel

Returns:

double