G36SupplyAirTemperatureSetpoint

Brief Description

Supply air temperature operation following the guideline 36 recommendations

Detailed Description

Verify that the supply air temperature setpoint of a system follows the guideline 36 recommendations

Index Description

Section 5.16.2.2 in ASHRAE Guideline 36-2021

Datapoints Description

mode_operation: System operation mode

temperature_air_outdoor: Outdoor air temperature

temperature_air_supply_max: Maximum supply air temperature setpoint based on requests

temperature_air_outdoor_supply_max: Maximum outdoor air temperature for linear SAT reset

temperature_air_outdoor_supply_min: Minimum outdoor air temperature for linear SAT reset

temperature_air_supply_setpoint_cool_min: Minimum cooling supply air temperature setpoint

temperature_air_supply_setpoint_cool_max: Maximum cooling supply air temperature setpoint

temperature_air_supply_setpoint: Supply air temperature setpoint

Type Verification Description

Procedure-based

Assertions Type

Pass

Assertions Description

if temperature_air_supply_max > temperature_air_supply_setpoint_cool_max

fail

end

switch mode_operation

case ‘cooldown’

t_sa_sp = temperature_air_supply_setpoint_cool_min

case ‘warmup’, ‘setback

t_sa_sp = 35 # 95 F

case ‘occupied’, ‘setup’

if temperature_air_outdoor <= temperature_air_outdoor_supply_min

t_sa_sp = temperature_air_supply_max

else if temperature_air_outdoor >= temperature_air_outdoor_supply_max

t_sa_sp = temperature_air_supply_setpoint_cool_min

else

t_sa_sp = (temperature_air_outdoor - temperature_air_outdoor_supply_min) * (temperature_air_supply_max - temperature_air_supply_setpoint_cool_min) / (temperature_air_outdoor_supply_min - temperature_air_outdoor_supply_max) + temperature_air_supply_max

# linear interpolation

end

end

if abs(t_sa_sp - temperature_air_supply_setpoint) = 0

pass

else

fail

end