old_contents: # -*- coding: utf-8 -*-
  """
  This file contains the constants used in the building energy demand calculations
  """
  __author__ = "Gabriel Happle"
  __copyright__ = "Copyright 2018, Architecture and Building Systems - ETH Zurich"
  __credits__ = ["Gabriel Happle"]
  __license__ = "MIT"
  __version__ = "0.1"
  __maintainer__ = "Daren Thomas"
  __email__ = "cea@arch.ethz.ch"
  __status__ = "Production"
  
  
  # all values are refactored from legacy Globalvars unless stated otherwise
  
  # DEFAULT BUILDING GEOMETRY
  H_F = 3  # average height per floor in m
  E_S = 0.9  # franction of GFA that has electricity in every building
  D = 20  # in mm the diameter of the pipe to calculate losses
  
  # SOLAR
  RSE = 0.04  # thermal resistance of external surfaces according to ISO 6946
  F_F = 0.2  # Frame area faction coefficient
  
  # HVAC SYSTEMS & VENTILATION
  ETA_REC = 0.75  # constant efficiency of Heat recovery
  DELTA_P_DIM = 5  # (Pa) dimensioning differential pressure for multi-storey building shielded from wind,
                   # according to DIN 1946-6
  SHIELDING_CLASS = 2  # according to ISO 16798-7, 0 = open terrain, 1 = partly shielded from wind,
          #  2 = fully shielded from wind
  P_FAN = 0.55  # specific fan consumption in W/m3/h
  
  # pumps ?
  # TODO: Document
  DELTA_P_1 = 0.1  # delta of pressure
  F_SR = 0.3  # factor for pressure calculation
  HOURS_OP = 5  # assuming around 2000 hours of operation per year. It is charged to the electrical system from 11 am to 4 pm
  GR = 9.81  # m/s2 gravity
  EFFI = 0.6  # efficiency of pumps
  
  # WATER
  FLOWTAP = 0.036  # in m3 == 12 l/min during 3 min every tap opening
  TWW_SETPOINT = 60  # dhw tank set point temperature in C
  
  
  
  # PHYSICAL
  H_WE = 2466e3  # (J/kg) Latent heat of vaporization of water [section 6.3.6 in ISO 52016-1:2007]
  C_A = 1006  # (J/(kg*K)) Specific heat of air at constant pressure [section 6.3.6 in ISO 52016-1:2007]
  
  C_P_A = 1.008  # specific heat capacity of air in KJ/kgK
  
  # RC-MODEL
  B_F = 0.7  # it calculates the coefficient of reduction in transmittance for surfaces in contact with the ground according to values of SIA 380/1
  H_IS = 3.45  # heat transfer coefficient between air and the surfacein W/(m2K)
  H_MS = 9.1  # heat transfer coefficient between nodes m and s in W/m2K
new_contents: # -*- coding: utf-8 -*-
  """
  This file contains the constants used in the building energy demand calculations
  """
  __author__ = "Gabriel Happle"
  __copyright__ = "Copyright 2018, Architecture and Building Systems - ETH Zurich"
  __credits__ = ["Gabriel Happle"]
  __license__ = "MIT"
  __version__ = "0.1"
  __maintainer__ = "Daren Thomas"
  __email__ = "cea@arch.ethz.ch"
  __status__ = "Production"
  
  
  # all values are refactored from legacy Globalvars unless stated otherwise
  
  # DEFAULT BUILDING GEOMETRY
  H_F = 3  # average height per floor in m
  E_S = 0.9  # franction of GFA that has electricity in every building
  D = 20  # in mm the diameter of the pipe to calculate losses
  
  # SOLAR
  RSE = 0.04  # thermal resistance of external surfaces according to ISO 6946
  F_F = 0.2  # Frame area faction coefficient
  
  # HVAC SYSTEMS & VENTILATION
  ETA_REC = 0.75  # constant efficiency of Heat recovery
  DELTA_P_DIM = 5  # (Pa) dimensioning differential pressure for multi-storey building shielded from wind,
                   # according to DIN 1946-6
  SHIELDING_CLASS = 2  # according to ISO 16798-7, 0 = open terrain, 1 = partly shielded from wind,
          #  2 = fully shielded from wind
  P_FAN = 0.55  # specific fan consumption in W/m3/h
  
  # pumps ?
  # TODO: Document
  DELTA_P_1 = 0.1  # delta of pressure
  F_SR = 0.3  # factor for pressure calculation
  HOURS_OP = 5  # assuming around 2000 hours of operation per year. It is charged to the electrical system from 11 am to 4 pm
  GR = 9.81  # m/s2 gravity
  EFFI = 0.6  # efficiency of pumps
  
  # WATER
  FLOWTAP = 0.036  # in m3 == 12 l/min during 3 min every tap opening
  TWW_SETPOINT = 60  # dhw tank set point temperature in C
  
  
  
  # PHYSICAL
  H_WE = 2466e3  # (J/kg) Latent heat of vaporization of water [section 6.3.6 in ISO 52016-1:2007]
  C_A = 1006  # (J/(kg*K)) Specific heat of air at constant pressure [section 6.3.6 in ISO 52016-1:2007]
  
  C_P_A = 1.008  # specific heat capacity of air in KJ/kgK
  
  # RC-MODEL
  B_F = 0.7  # it calculates the coefficient of reduction in transmittance for surfaces in contact with the ground according to values of SIA 380/1
  H_IS = 3.45  # heat transfer coefficient between air and the surfacein W/(m2K)
  H_MS = 9.1  # heat transfer coefficient between nodes m and s in W/m2K
  LAMBDA_AT = 4.5 # dimensionless ratio between the internal surfaces area and the floor area from ISO 13790 Eq. 9
subject: Add LAMBDA_AT