Skip to content

Latest commit

 

History

History
50 lines (41 loc) · 5.27 KB

is_baseline_system_7.md

File metadata and controls

50 lines (41 loc) · 5.27 KB

is_baseline_system_7

Description: Get either Sys-7, Sys-7a, Sys-7b, Sys-7c or Not_Sys_7 string output which indicates whether the HVAC system is ASHRAE 90.1 2019 Appendix G system 7 (VAV with Reheat), system 7a (system 7 with purchased CHW), system 7b (system 7 with purchased heating), pr system 7c (system 7 with purchased heating and purchased CHW).

Inputs:

  • B-RMR: To evaluate if the hvac system is modeled as either Sys-7, Sys-7a, Sys-7b, Sys-7c or Not_Sys_7 in the B_RMR.
  • hvac_b.id: The id of the hvac system to evaluate.
  • terminal_unit_id_list: list of terminal unit IDs associated with the HVAC system to be evaluated. These are sent to this function from the master get_baseline_system_types function.
  • zone_id_list: list of zone IDs associated with the HVAC system to be evaluated. These are sent to this function from the master get_baseline_system_types function.

Returns:

  • is_baseline_system_7: The function returns either Sys-7, Sys-7a, Sys-7b, Sys-7c or Not_Sys_7 string output which indicates whether the HVAC system is ASHRAE 90.1 2019 Appendix G system 7 (VAV with Reheat), system 7a (system 7 with purchased CHW), system 7b (system 7 with purchased heating), pr system 7c (system 7 with purchased heating and purchased CHW).

Function Call:

  1. does_each_zone_have_only_one_terminal()
  2. is_hvac_sys_fluid_loop_purchased_CHW()
  3. is_hvac_sys_cooling_type_fluid_loop()
  4. is_hvac_sys_fluid_loop_attached_to_chiller()
  5. is_hvac_sys_preheating_type_fluid_loop()
  6. is_hvac_sys_preheat_fluid_loop_attached_to_boiler()
  7. is_hvac_sys_preheat_fluid_loop_purchased_heating()
  8. is_hvac_sys_fan_sys_VSD()
  9. are_all_terminal_heat_sources_hot_water()
  10. are_all_terminal_heating_loops_attached_to_boiler()
  11. are_all_terminal_heating_loops_purchased_heating()
  12. are_all_terminal_cool_sources_none_or_null()
  13. are_all_terminal_fans_null()
  14. are_all_terminal_types_VAV()

Logic:

  • Create an object associated with the hvac system: hvac_b = hvac_b.id
  • Set is_baseline_system_7 = Not_Sys_7: is_baseline_system_7 = "Not_Sys_7"
  • Check that there is no heating system, if there is none then carry on: if hvac_b.heating_system == Null or hvac_b.heating_system.heating_system_type == "NONE":
    • Check that there is one preheat system per G3.1.3.19, if there is then carry on: if hvac_b.preheat_system != Null:
      • Check if the preheat system is a fluid loop, if yes then carry on: if is_hvac_sys_preheating_type_fluid_loop(B_RMR, hvac_b.id) == TRUE:
        • Check that there is only one cooling system: if hvac_b.cooling_system == TRUE:
          • Check if the cooling system type is a fluid loop, if yes then carry on: if is_hvac_sys_cooling_type_fluid_loop(B_RMR, hvac_b.id) == TRUE:
            • Check if fansystem is variable speed drive controlled, if yes then carry on: if is_hvac_sys_fan_sys_VSD(B_RMR, hvac_b.id) == TRUE:
              • Check that each zone only has one terminal unit: if does_each_zone_have_only_one_terminal(B_RMR,zone_id_list) == TRUE:
                • Check that the data elements associated with the terminal units align with system 7: if are_all_terminal_heat_sources_hot_water(B_RMR,terminal_unit_id_list) == TRUE AND are_all_terminal_cool_sources_none_or_null(B_RMR,terminal_unit_id_list) == TRUE And are_all_terminal_fans_null(B_RMR,terminal_unit_id_list) == TRUE and are_all_terminal_types_VAV(B_RMR,terminal_unit_id_list) == TRUE:
                  • if the preheat loop and all terminals are attached to a boiler and the hvac sys CHW loop is attached to a chiller then Sys-7: if is_hvac_sys_preheat_fluid_loop_attached_to_boiler(B_RMR, hvac_b.id) == TRUE AND are_all_terminal_heating_loops_attached_to_boiler(B_RMR,terminal_unit_id_list) == TRUE AND is_hvac_sys_fluid_loop_attached_to_chiller(B_RMR, hvac_b.id) == TRUE: is_baseline_system_7 = "Sys-7"
                  • elif the preheat loop and all terminals are attached to a boiler and the hvac sys CHW loop is purchased cooling then Sys-7a: elif is_hvac_sys_preheat_fluid_loop_attached_to_boiler(B_RMR, hvac_b.id) == TRUE AND are_all_terminal_heating_loops_attached_to_boiler(B_RMR,terminal_unit_id_list) == TRUE AND is_hvac_sys_fluid_loop_purchased_CHW(B_RMR, hvac_b.id) == TRUE: is_baseline_system_7 = "Sys-7a"
                  • elif the preheat loop and all terminals are purchased heating and the hvac sys CHW loop is attached to a chiller then Sys-7b: elif is_hvac_sys_preheat_fluid_loop_purchased_heating(B_RMR, hvac_b.id) == TRUE and are_all_terminal_heating_loops_purchased_heating(B_RMR,terminal_unit_id_list) == TRUE AND is_hvac_sys_fluid_loop_attached_to_chiller(B_RMR, hvac_b.id) == TRUE: is_baseline_system_7 = "Sys-7b"
                  • elif the preheat loop and all terminals are purchased heating and the hvac sys CHW loop is purchased cooling then Sys-7c: elif is_hvac_sys_preheat_fluid_loop_purchased_heating(B_RMR, hvac_b.id) == TRUE and are_all_terminal_heating_loops_purchased_heating(B_RMR,terminal_unit_id_list) == TRUE AND is_hvac_sys_fluid_loop_purchased_CHW(B_RMR, hvac_b.id) == TRUE:is_baseline_system_7 = "Sys-7c"

Returns is_baseline_system_7

Back