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Nrcan issue 408 Exclude district heating and cooling from EUI for GSHP #1642

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merged 3 commits into from
Nov 27, 2023
Merged

Nrcan issue 408 Exclude district heating and cooling from EUI for GSHP #1642

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36b4653
Working on excluding district heating and cooling from energy use rep…
srgilani Nov 22, 2023
099ab2d
Revised the energy_eui_data method in btap_data.rb in a way to exclud…
srgilani Nov 23, 2023
226d3e8
Added a comment to btap_data.rb re changes in the calculation of EUI …
srgilani Nov 23, 2023
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27 changes: 22 additions & 5 deletions lib/openstudio-standards/standards/necb/common/btap_data.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ def initialize(model:, runner: nil, cost_result:, baseline_cost_equipment_total_
@btap_data.merge!(building_costing_data(cost_result)) unless cost_result.nil?
@btap_data.merge!(climate_data)
@btap_data.merge!(service_water_heating_data)
@btap_data.merge!(energy_eui_data)
@btap_data.merge!(energy_eui_data(model))
@btap_data.merge!(energy_peak_data)
@btap_data.merge!(utility(model))
@btap_data.merge!(unmet_hours(model))
Expand Down Expand Up @@ -1400,7 +1400,7 @@ def energy_peak_data
return data
end

def energy_eui_data
def energy_eui_data(model)
data = {}
# default to zero to start.
['energy_eui_fans_gj_per_m_sq',
Expand All @@ -1412,6 +1412,16 @@ def energy_eui_data
'energy_eui_total_gj_per_m_sq',
'energy_eui_heat recovery_gj_per_m_sq',
'energy_eui_water systems_gj_per_m_sq'].each { |end_use| data[end_use] = 0.0 }

# Check if the HVAC of the model is GSHP
plant_loops = model.getPlantLoops
model_has_how_many_GSHP = 0.0
plant_loops.each do |plantloop|
if plantloop.name.to_s.upcase.include? "GLHX"
model_has_how_many_GSHP += 1.0
end
end

# Get E+ End use table from sql
table = get_sql_table_to_json(@model, 'AnnualBuildingUtilityPerformanceSummary', 'Entire Facility', 'End Uses')['table']
# Get rid of totals and averages rows.. I want just the
Expand All @@ -1422,13 +1432,20 @@ def energy_eui_data
# Store eui by use name.
data["energy_eui_#{row['name'].downcase}_gj_per_m_sq"] = energy_columns.inject(0) { |sum, tuple| sum += tuple[1] } / @conditioned_floor_area_m_sq
end

data['energy_eui_total_gj_per_m_sq'] = 0.0
['natural_gas_GJ', 'electricity_GJ', 'additional_fuel_GJ'].each do |column|

['natural_gas_GJ', 'electricity_GJ', 'additional_fuel_GJ', 'district_cooling_GJ', 'district_heating_GJ'].each do |column|
data["energy_eui_#{column.downcase}_per_m_sq"] = table.inject(0) { |sum, row| sum + (row[column].nil? ? 0.0 : row[column]) } / @conditioned_floor_area_m_sq
data['energy_eui_total_gj_per_m_sq'] += data["energy_eui_#{column.downcase}_per_m_sq"] unless data["energy_eui_#{column.downcase}_per_m_sq"].nil?
end
['district_cooling_GJ', 'district_heating_GJ'].each do |column|
data["energy_eui_#{column.downcase}_per_m_sq"] = table.inject(0) { |sum, row| sum + (row[column].nil? ? 0.0 : row[column]) } / @conditioned_floor_area_m_sq

# If the HVAC of the model is GSHP, district heating and cooling must be removed from EUIs for heating and cooling and total EUI
# NOTE: it has been assumed that if a model has GSHP, that is the only HVAC type in the model. This assumption means that any district heating/cooling in the model is related to GSHP.
if model_has_how_many_GSHP > 0.0
data['energy_eui_heating_gj_per_m_sq'] -= data['energy_eui_district_heating_gj_per_m_sq']
data['energy_eui_cooling_gj_per_m_sq'] -= data['energy_eui_district_cooling_gj_per_m_sq']
data['energy_eui_total_gj_per_m_sq'] -= (data['energy_eui_district_heating_gj_per_m_sq'] + data['energy_eui_district_cooling_gj_per_m_sq'])
end

# Get total and net site energy use intensity
Expand Down