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

operation_mode: System operation mode

oa_t: Outdoor air temperature

t_max: Maximum supply air temperature setpoint based on requests

sa_t_sp_ac: Actual supply air temperature setpoint

oa_t_min: Minimum outdoor air temperature for linear SAT reset

oa_t_max: Maximum outdoor air temperature for linear SAT reset

min_clg_sa_t_sp: Minimum cooling supply air temperature setpoint

max_clg_sa_t_sp: Maximum cooling supply air temperature setpoint

sa_sp_tol: supply air temperature tolerance

Type Verification Description

Procedure-based

Assertions Type

Pass

Assertions Description

if t_max > max_clg_sa_t_sp

fail

end

switch operation_mode

case ‘cooldown’

sa_t_sp = min_clg_sa_t_sp

case ‘warmup’, ‘setback

sa_t_sp = 35 # 95 F

case ‘occupied’, ‘setup’

if oa_t <= oa_t_min

sa_t_sp = t_max

else if oa_t >= oa_t_max

sa_t_sp = min_clg_sa_t_sp

else

sa_t_sp = (oa_t - oa_t_min) * (t_max - min_clg_sa_t_sp) / (oa_t_min - oa_t_max) + t_max

# linear interpolation

end

end

if abs(sa_t_sp - sa_t_s_ac) < sa_sp_tol

pass

else

fail

end