Class: RoomConfiguration::OperatingCostsCalculator

Inherits:
Object
  • Object
show all
Defined in:
app/services/room_configuration/operating_costs_calculator.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(room_configuration, options = {}) ⇒ OperatingCostsCalculator

Returns a new instance of OperatingCostsCalculator.

Parameters:

  • room_configuration (RoomConfiguration) —

    the room configuration to calculate operating costs for

  • options (Hash) (defaults to: {}) —

    configurable options

Options Hash (options):

  • logger (Logger) —

    logger to use (defaults to Rails.logger)



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# File 'app/services/room_configuration/operating_costs_calculator.rb', line 24

def initialize(room_configuration, options = {})
  @options = options
  @room_configuration = room_configuration
  @logger = options[:logger] || Rails.logger
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'app/services/room_configuration/operating_costs_calculator.rb', line 3

def logger
  @logger
end

#results ⇒ Object (readonly)

Returns the value of attribute results.



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# File 'app/services/room_configuration/operating_costs_calculator.rb', line 3

def results
  @results
end

#room_configuration ⇒ Object (readonly)

Returns the value of attribute room_configuration.



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# File 'app/services/room_configuration/operating_costs_calculator.rb', line 3

def room_configuration
  @room_configuration
end

Class Method Details

.get_monthly_operation_kwh(hl_avg_comfort, hl_avg_economy) ⇒ Object

res[:avg_num_hrs_per_month] = (RoomConfigurationConstants::AVG_DAYS_PER_MONTH[:week_day] + RoomConfigurationConstants::AVG_DAYS_PER_MONTH[:week_end_day]).to_f*24.0
res[:avg_num_comfort_hrs_per_month] = RoomConfigurationConstants::AVG_DAYS_PER_MONTH[:week_day]*RoomConfigurationConstants::HOURS_OF_OPERATION_PER_DAY[:comfort][:week_day] + RoomConfigurationConstants::AVG_DAYS_PER_MONTH[:week_end_day]*RoomConfigurationConstants::HOURS_OF_OPERATION_PER_DAY[:comfort][:week_end_day]
res[:avg_num_economy_hrs_per_month] = RoomConfigurationConstants::AVG_DAYS_PER_MONTH[:week_days]*RoomConfigurationConstants::HOURS_OF_OPERATION_PER_DAY[:economy][:week_day] + RoomConfigurationConstants::AVG_DAYS_PER_MONTH[:week_end_day]*RoomConfigurationConstants::HOURS_OF_OPERATION_PER_DAY[:economy][:week_end_day]



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# File 'app/services/room_configuration/operating_costs_calculator.rb', line 8

def self.get_monthly_operation_kwh(hl_avg_comfort, hl_avg_economy)
  # assumptions:
  # use average number of weekdays vs weekends per month, derived from averaging actual number in 4 year cycle
  monthly_kwh = 0.0
  %i[week_day week_end_day].each do |days_type|
    { comfort: hl_avg_comfort, economy: hl_avg_economy }.each do |k, hl|
      monthly_kwh += RoomConfigurationConstants::AVG_DAYS_PER_MONTH[days_type] *
                     RoomConfigurationConstants::HOURS_OF_OPERATION_PER_DAY[k][days_type] * (hl / RoomConfiguration::BTU_PER_HOUR_PER_WATT) / 1000.0
    end
  end
  monthly_kwh
end

Instance Method Details

#calculate_operating_costs_without_hlc ⇒ Object 



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# File 'app/services/room_configuration/operating_costs_calculator.rb', line 45

def calculate_operating_costs_without_hlc
  if @room_configuration.heating_elements.to_a.any? && @room_configuration.installation_postal_code.present?
    temp_data = AverageMonthlyTemperature.get_from_postal_code(@room_configuration.installation_postal_code)
    return { status: 'error', message: "can't calculate operating costs, temperatures error: #{temp_data[:message]}" } if temp_data[:status] != :ok

    # get utility rate $ cost per kwH using room's location
    rate_data = ElectricityRate.get_from_postal_code(@room_configuration.installation_postal_code)
    return { status: 'error', message: "can't calculate operating costs, electricity rate error: #{rate_data[:message]}" } if rate_data[:status] != :ok

    avg_cost_per_kwh = rate_data[:average_rate]
    kw = @room_configuration.calculate_total_kilowatts
    operating_costs = []
    operating_hrs = []
    # here we assume a linear relationship temp diff of outside to desired ambient divided by desired ambient where desired comfort and economy is from the average and low in TEMPERATURE_OPTIONS
    avg_comfort_temp = RoomConfiguration::TEMPERATURE_OPTIONS.find { |to| to.first == 'Average' }.last
    avg_economy_temp = RoomConfiguration::TEMPERATURE_OPTIONS.find { |to| to.first == 'Low' }.last
    12.times do |month|
      tdiffcom = avg_comfort_temp - temp_data[:average_temperatures][month]
      tdiffcom = 0.0 if tdiffcom < 0.0
      tdiffcom = avg_comfort_temp if tdiffcom > avg_comfort_temp
      factorcom = tdiffcom / avg_comfort_temp
      tdiffeco = avg_economy_temp - temp_data[:average_temperatures][month]
      tdiffeco = 0.0 if tdiffeco < 0.0
      tdiffeco = avg_economy_temp if tdiffeco > avg_economy_temp
      factoreco = tdiffeco / avg_economy_temp
      hrs = (RoomConfigurationConstants::AVERAGE_HOURS[:avg_num_comfort_hrs_per_month] * factorcom) + (RoomConfigurationConstants::AVERAGE_HOURS[:avg_num_economy_hrs_per_month] * factoreco)
      operating_hrs << hrs
      operating_costs << (hrs * kw * avg_cost_per_kwh)
    end
    { status: 'ok', operating_cost_by_month: operating_costs, operating_cost_annual: operating_costs.sum.round(2), operating_cost_by_month_average: (operating_costs.sum / 12.0).round(2),
operating_cost_by_coldest_month: operating_costs.max.round(2), message: "assuming default SmartStat settings, yielding average operation of #{(operating_hrs.sum / 365.0).round(1)} hours per day annually, and coldest month operation of #{(operating_hrs.max / 30.4).round(1)} hours per day, based on average monthly temperatures and electricity rates in your area." }
  else
    { status: 'error', message: 'can\'t calculate operating costs' }
  end
end

#get_operating_costs ⇒ Object 



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# File 'app/services/room_configuration/operating_costs_calculator.rb', line 30

def get_operating_costs
  operating_cost_by_hlc = false
  operating_cost_by_hlc = true if @room_configuration.last_heat_loss && @room_configuration.last_heat_loss['operating_cost']
  if @room_configuration.allow_heat_loss_calculation? && @room_configuration.can_calculate_heat_loss? && @room_configuration.floor_type&.is_indoors?
    @room_configuration.calculate_heat_loss
    operating_cost_by_hlc = true if @room_configuration.last_heat_loss && @room_configuration.last_heat_loss['operating_cost']
  end
  if operating_cost_by_hlc
    { status: 'ok', operating_cost_by_month: @room_configuration.last_heat_loss['operating_cost'], operating_cost_annual: @room_configuration.last_heat_loss['operating_cost'].sum.round(2),
operating_cost_by_month_average: (@room_configuration.last_heat_loss['operating_cost'].sum / 12.0).round(2), operating_cost_by_coldest_month: @room_configuration.last_heat_loss['operating_cost'].max.round(2), message: "assuming default thermostat settings, and taking account the details entered for this room for insulation and openings, yielding average operation of #{(@room_configuration.last_heat_loss['operating_hrs'].sum / 365.0).round(1)} hours per day annually, and coldest month operation of #{(@room_configuration.last_heat_loss['operating_hrs'].max / 30.4).round(1)} hours per day, based on average monthly temperatures and electricity rates in your area." }
  else
    calculate_operating_costs_without_hlc
  end
end