choice – Project Haystack

def

choice

Choice specifies an exclusive marker selection. See Choices chapter.

meta

supertypes

marker

Marker labels a dict with typing information

subtypes

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