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10-13B.md

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Airside systems – Rule 10-13B

Schema Version: 0.0.23

Mandatory Rule: False
Rule ID: 10-13B

Rule Description: For proposed HVAC systems designed, mechanical preheating equipment efficiencies shall be adjusted to remove the supply fan energy from the efficiency rating.

Rule Assertion: P-RMR = expected value
Appendix G Section: Table G3.1 Section 10 b.
Appendix G Section Reference: None
Data Lookup: None
Evaluation Context: Evaluate each HeatingVentilatingAirConditioningSystem

Applicability Checks:

  1. HVAC with mechanical heating.

Function Call: None

Manual Check:

  1. Check that the mechanical equipment heating efficiency has been adjusted to remove the supply fan energy from the efficiency rating.

Rule Logic:

Applicability Check 1:

  • For each hvac system in the P_RMR: for hvac_p in P_RMR...HeatingVentilatingAirConditioningSystem:
    • For each preeating system in the HVAC system: for preheating_system_p in hvac_p.preheat_system:

      • Check that heating system type is equal to heat_pump:: if preheating_system_p.heating_system_type == "HEAT_PUMP":

        • Reset no_fan_eff_entered boolean variable: no_fan_eff_entered = FALSE
        • loop through each of the efficiency_metric_types associated with the heating system until HEAT_PUMP_COEFFICIENT_OF_PERFORMANCE_HIGH_TEMPERATURE_NO_FAN is found (this is the metric in 90.1 2019 used for heat pump performance per table 6.8.1.4). Get the associated value of the efficiency from the list of efficiency_metric_values associated with the preheating_system_p: for x in range(len(preheating_system_p.efficiency_metric_values)):
          • check if the efficiency_metric_type equals HEAT_PUMP_COEFFICIENT_OF_PERFORMANCE_HIGH_TEMPERATURE_NO_FAN: if preheating_system_p.efficiency_metric_types[x] == "HEAT_PUMP_COEFFICIENT_OF_PERFORMANCE_HIGH_TEMPERATURE_NO_FAN":
            • Check that the no fan full load heating efficiency does not equal Null: if preheating_system_p.efficiency_metric_values[x] != Null: no_fan_eff_entered = TRUE
          • Else: Else: no_fan_eff_entered = FALSE

        Rule Assertion:

        • Case 1: For each applicable heating system, if no_fan_eff_entered = TRUE then pass: if no_fan_eff_entered == TRUE: outcome == "PASS"
        • Case 2: For each applicable heating system, else (no_fan_eff_entered = FALSE) then fail: Else: outcome == "FAIL" and raise_message "Per Table G3.1 section 10 b heating efficiency is required to be adjusted to remove the supply fan energy from the efficiency rating. A no fan full load heating efficiency does not appear to have been modeled for this heating system."

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