HB Annual Load - North

XavierZhouLadybug · October 26, 2021, 9:34am

Hi, I just realised the HB Annual Load doesn’t have an input of “North”, unlike other recipes like daylight and PMV. Does it mean that I have to rotate the building such that the north is along the y-axis for HB Annual Load simulations?

chris · October 26, 2021, 3:16pm

I can add one if it becomes a pain point for a lot of people but it only takes a line of code if you want to change this now. You’ll just add a north_ input for the component and, at some point after this line:

github.com

ladybug-tools/honeybee-grasshopper-energy/blob/master/honeybee_grasshopper_energy/src/HB Annual Loads.py#L217

    
      
          floor_area = floor_area * conversion_to_meters() ** 2
          mults = [rm.multiplier for rm in _rooms]
          mults = None if all(mul == 1 for mul in mults) else mults
          
          
# process the simulation folder name and the directory
          directory = os.path.join(folders.default_simulation_folder, _model.identifier)
          sch_directory = os.path.join(directory, 'schedules')
          nukedir(directory)  # delete any existing files in the directory
          
          
# create simulation parameters for the coarsest/fastest E+ sim possible
          _sim_par_ = SimulationParameter()
          _sim_par_.timestep = _timestep_ if _timestep_ is not None else 1
          _sim_par_.shadow_calculation.solar_distribution = 'FullExterior'
          _sim_par_.output.add_zone_energy_use()
          _sim_par_.output.reporting_frequency = 'Monthly'
          if run_bal_:
              _sim_par_.output.add_output(gl_el_equip_out)
              _sim_par_.output.add_output(gl_gas_equip_out)
              _sim_par_.output.add_output(gl1_shw_out)
              _sim_par_.output.add_output(gl2_shw_out)
              _sim_par_.output.add_gains_and_losses('Total')

… you’ll add:

_sim_par_.north_angle  = north_

chris · October 26, 2021, 7:36pm

As luck would have it, I was already refactoring this component today in order to add support for Process loads. So I added in a _north_ input that functions just like all of the other _north_ inputs.

You should be able to get the update with the LB Versioner before the end of today.