choice – Project Haystack

choice

Choice specifies an exclusive marker selection

    ahuZoneDelivery

AHU delivery method of conditioned air to the zone

        chilledBeamZone

AHU supplies air to chilled beam terminal units

        directZone

AHU supplies air directly to the zone

        multiZone

AHU discharge air is split into a duct per zone

        vavZone

AHU supplies air to VAV terminal units

    airVolumeAdjustability

Ability of air handling equip to adjust volume of air flow

        constantAirVolume

Delivers a constant volume of air flow

        variableAirVolume

Delivers a variable volume of air flow

    atesDesign

Design type of the ATES underground system

        atesClosedLoop

The ATES uses closed piping to transport a water/glycol mixture through the ground

        atesDoublet

The ATES has one or more pairs of a separate warm and cool well

        atesDoubletPaired

The ATES is as a doublet, but with specific warm and cool wells linked together

        atesMono

The ATES has only one physical well

        atesUnidirectional

Similar to a doublet, but water always flows in the same direction from the extraction to the infiltration well

    chillerMechanism

Primary mechanism of chiller

        chiller-absorption

Cooling process using energy from heat source such as hot water

        chiller-centrifugal

Compression via a continuous flow of fluid through an impeller

        chiller-reciprocal

Piston compressor driven by a crankshaft

        chiller-rotaryScrew

Rotary screw compression

    condenserLoop

Open or closed loop for condenser working fluid

        condenserClosedLoop

Working fluid is kept separate from fluid used for heat transfer into the atmosphere

        condenserOpenLoop

Uses working fluid itself for evaporation into the atmosphere

    coolingProcess

Processed used to cool a substance

        airCooling

Cooling by dissipating heat into the surrounding air

        chilledWaterCooling

Cooling using transfer of heat to chilled water

        condenserCooling

Removal of heat through the process of water condensation

        dxCooling

Cooling using direct expansion of a refrigerant vapor

        waterCooling

Cooling using transfer of heat to water which is not explicitly chilled

    ductConfig

Ductwork configuration

        dualDuct

Two ducts

        singleDuct

One single duct

        tripleDuct

Three ducts

    ductDeck

Cold, hot, or neutral deck

        coldDeck

Duct carries air for cooling

        hotDeck

Duct carries air for heating

        neutralDeck

Duct carries air which by-passes both heating and cooling coils

    ductSection

Equipment section of ductwork

        discharge

Duct for air leaving an equipment

        economizer

Duct to access fresh outside air only for economizing, not ventilation

        exhaust

Duct used to expel air back outside

        flue

Duct for exhausting combustion

        inlet

Duct with air entering an equipment

        mixed

Duct where fresh outside air and return air is mixed together

        outside

Duct to access fresh outside air for both ventilation and economizer

        return

Duct returning air back to equipment

        ventilation

Duct to access fresh outside air only for ventilation, not economizing

    heatingProcess

Processed used to heat a substance

        biomassHeating

Heating by the combustion of biomass

        coalHeating

Heating by the combustion of coal

        dxHeating

Heating using direct expansion of a refrigerant vapor

        elecHeating

Heating by the conversion of electrical energy

        fuelOilHeating

Heating by the combustion of fuel oil

        hotWaterHeating

Heating using energy of hot water

        naturalGasHeating

Heating by the combustion of natural gas

        propaneHeating

Heating by the combustion of propane

        steamHeating

Heating using energy of steam

    meterScope

Classifies a meter as a main site meter or submeter

        siteMeter

Main meter for the associated site

        submeter

Submeters measure usage of a sub-system or equipment within a site

    pipeFluid

Type of fluid conveyed by piping

    pipeSection

Equipment section of piping

        bypass

Pipe used to bypass an equipment

        circ

Pipe used to circulate fluid through an equipment or system

        entering

Pipe conveys fluid into an equipment

        header

Pipe used as central connection or manifold for other piping runs

        leaving

Pipe conveys fluid out of an equipment

    plantLoop

Plant piping loop

        primaryLoop

Pipework which circulates closest to the energy source

        secondaryLoop

Pipework which circulates closest to the building or end use

        tertiaryLoop

Pipework which circulates within the building

    pointFunction

Classifies the point as a sensor, command, or setpoint

        cmd

Point is a command, actuator, AO/BO

        sensor

Point is a sensor, input, AI/BI

        sp

Point is a setpoint, soft point, internal control variable, schedule

    pointQuantity

Quantity the point senses or controls

    pointSubject

What the point senses or controls

    tankSubstance

Substance stored by a tank

    vavAirCircuit

How does the VAV pull in air

        vav-parallel

VAV pulls air from outside the primary air flow

        vav-series

VAV pulls air from the primary air flow

    vavModulation

How does VAV modulate the temp based on duct pressure

        pressureDependent

VAV damper modulates to control space temp

        pressureIndependent

VAV damper or a control valve that modulates to maintain desired flow setpoint