57 lines
2.2 KiB
Python
57 lines
2.2 KiB
Python
"""
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LifeCycleCosts calculates the life cycle costs of one building
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SPDX - License - Identifier: LGPL - 3.0 - or -later
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Copyright © 2022 Project Author Pilar Monsalvete Alvarez de Uribarri pilar_monsalvete@concordia.ca
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"""
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import math
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class LifeCycleCosts:
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# todo: this should be (city, costs_catalog) or similar
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def __init__(self, building, number_of_years, consumer_price_index, discount_rate, end_of_life_cost,
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capital_costs_at_year_0, items, fuels, concepts):
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self._building = building
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self._number_of_years = number_of_years
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self._consumer_price_index = consumer_price_index
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self._discount_rate = discount_rate
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self._end_of_life_cost = end_of_life_cost
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self._capital_costs_at_year_0 = capital_costs_at_year_0
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self._items = items
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self._fuels = fuels
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self._concepts = concepts
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def calculate_capital_costs(self):
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total_capital_costs = self._capital_costs_at_year_0
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for year in range(1, self._number_of_years + 1):
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costs_increase = math.pow(1 + self._consumer_price_index, year) / math.pow(1 + self._discount_rate, year)
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for item in self._items:
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total_capital_costs += item.reposition_costs[year] * costs_increase
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return total_capital_costs
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def calculate_end_of_life_costs(self):
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price_increase = 0
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for year in range(1, self._number_of_years + 1):
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price_increase += math.pow(1 + self._consumer_price_index, year) / math.pow(1 + self._discount_rate, year)
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return self._end_of_life_cost * price_increase
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def calculate_total_operational_costs(self):
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total_operational_costs = 0
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for year in range(1, self._number_of_years + 1):
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for fuel in self._fuels:
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total_operational_costs += fuel.operational_cost \
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* math.pow(1 + fuel.energy_price_index, year) / math.pow(1 + self._discount_rate, year)
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return total_operational_costs
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def calculate_total_maintenance_costs(self):
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total_maintenance_costs = 0
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for year in range(1, self._number_of_years + 1):
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costs_increase = math.pow(1 + self._consumer_price_index, year) / math.pow(1 + self._discount_rate, year)
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for concept in self._concepts:
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total_maintenance_costs += concept.mantainance_costs * costs_increase
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return total_maintenance_costs
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