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Rule11-9.md

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Service_Water_Heating - Rule 11-9

Schema Version: 0.0.38

Mandatory Rule: FALSE

Rule ID: 11-9

Rule Description: The baseline system must be sized according to Standard 90.1 2019, Section 7.4.1.

Rule Assertion: UNDETERMINED / NOT_APPLICABLE

Appendix G Section Reference: Table G3.1 #11, baseline column, a

Evaluation Context: B-RMD each SHW BAT
Data Lookup:
Function Call:

  • get_SWH_bats_and_SWH_use

Applicability Checks:

  • check that the SHW BAT in the B_RMD has SHW loads

Applicability Checks:

  • only projects with SHW use for the SHW space BAT in the baseline model are applicable

  • create boolean rule_is_applicable and set it to false: rule_is_applicable = FALSE

  • use the function get_SWH_bats_and_SWH_use to get a list of SWH uses for each BAT: shw_bat_uses_dict = get_SWH_bats_and_SWH_use(B_RMD)

  • look at each SHW BAT: for swh_bat in shw_bat_uses_dict:

    • look at the uses in this swh bat: for swh_use_id in shw_bat_uses_dict[swh_bat]:
      • get the swh use: swh_use = get_component_by_id(B_RMD, ServiceWaterHeatingUse)
      • if even one use is greater than zero, go to rule assertion: if swh_use.use > 0:
        • set rule_is_applicable to true and go to the rule assertion: rule_is_applicable = TRUE
        • GO TO RULE ASSERTION

  • if we reach here without finding a swh use, go to rule assertion: GO TO RULE ASSERTION

    Rule Assertion:

    • if the boolean rule_is_applicable is equal to true, the rule is applicable, return UNDETERMINED and a note letting the reviewer know what to check: if rule_is_applicable: UNDETERMINED raise_message: "Check that the baseline Service Water Heating System for Building Area Type " + swh_bat + " is sized according to ASHRAE Standard 90.1 2019, Section 7.4.1."
    • otherwise, rule is not applicable: else: NOT_APPLICABLE

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