# created June 2015
# by TEASER4 Development Team
from teaser.logic.buildingobjects.buildingphysics.wall \
import Wall
[docs]
class OuterWall(Wall):
"""OuterWall class
This class holds information of an outer wall and is a child of Wall()
Parameters
----------
parent : ThermalZone()
The parent class of this object, the ThermalZone the BE belongs to.
Allows for better control of hierarchical structures. If not None it
adds this OuterWall to ThermalZone.outer_walls.
Default is None.
Attributes
----------
internal_id : float
Random id for the distinction between different elements.
name : str
Individual name
construction_data : str
Type of construction (e.g. "heavy" or "light"). Needed for
distinction between different constructions types in the same
building age period.
year_of_retrofit : int
Year of last retrofit
year_of_construction : int
Year of first construction
building_age_group : list
Determines the building age period that this building
element belongs to [begin, end], e.g. [1984, 1994]
area : float [m2]
Area of building element
tilt : float [degree]
Tilt against horizontal, default is 90.0
orientation : float [degree]
Azimuth direction of building element (0 : north, 90: east, 180: south,
270: west)
inner_convection : float [W/(m2*K)]
Constant heat transfer coefficient of convection inner side (facing
the zone), default 2.7
inner_radiation : float [W/(m2*K)]
Constant heat transfer coefficient of radiation inner side (facing
the zone), default 5.0
outer_convection : float [W/(m2*K)]
Constant heat transfer coefficient of convection outer side (facing
the ambient or adjacent zone), default 20.0
outer_radiation : float [W/(m2*K)]
Constant heat transfer coefficient of radiation outer side (facing
the ambient or adjacent zone), default 5.0
layer : list
List of all layers of a building element (to be filled with Layer
objects). Use element.layer = None to delete all layers of the building
element
Calculated Attributes
r1 : float [K/W]
equivalent resistance R1 of the analogous model given in VDI 6007
r2 : float [K/W]
equivalent resistance R2 of the analogous model given in VDI 6007
r3 : float [K/W]
equivalent resistance R3 of the analogous model given in VDI 6007
c1 : float [J/K]
equivalent capacity C1 of the analogous model given in VDI 6007
c2 : float [J/K]
equivalent capacity C2 of the analogous model given in VDI 6007
c1_korr : float [J/K]
corrected capacity C1,korr for building elements in the case of
asymmetrical thermal load given in VDI 6007
calc_u: Required area-specific U-value in retrofit cases [W/K]
ua_value : float [W/K]
UA-Value of building element (Area times U-Value)
r_inner_conv : float [K/W]
Convective resistance of building element on inner side (facing the
zone)
r_inner_rad : float [K/W]
Radiative resistance of building element on inner side (facing the
zone)
r_inner_conv : float [K/W]
Combined convective and radiative resistance of building element on
inner side (facing the zone)
r_outer_conv : float [K/W]
Convective resistance of building element on outer side (facing
the ambient or adjacent zone). Currently for all InnerWalls and
GroundFloors this value is set to 0.0
r_outer_rad : float [K/W]
Radiative resistance of building element on outer side (facing
the ambient or adjacent zone). Currently for all InnerWalls and
GroundFloors this value is set to 0.0
r_outer_conv : float [K/W]
Combined convective and radiative resistance of building element on
outer side (facing the ambient or adjacent zone). Currently for all
InnerWalls and GroundFloors this value is set to 0.0
wf_out : float
Weightfactor of building element ua_value/ua_value_zone
"""
def __init__(self, parent=None):
"""
"""
super(OuterWall, self).__init__(parent)
self._tilt = 90.0
self._inner_convection = 2.7
self._inner_radiation = 5.0
self._outer_convection = 20.0
self._outer_radiation = 5.0
@property
def parent(self):
return self.__parent
@parent.setter
def parent(self, value):
if value is not None:
ass_error_1 = "Parent has to be an instance of ThermalZone()"
assert type(value).__name__ == "ThermalZone", ass_error_1
self.__parent = value
if type(self).__name__ == "OuterWall":
self.__parent.outer_walls.append(self)
elif type(self).__name__ == "Rooftop":
self.__parent.rooftops.append(self)
elif type(self).__name__ == "GroundFloor":
self.__parent.ground_floors.append(self)
else:
raise ValueError('Instance of OuterWall not known')
if self.parent.parent is not None:
self.year_of_construction = \
self.parent.parent.year_of_construction
else:
pass
else:
self.__parent = None
[docs]
def retrofit_wall(self, year_of_retrofit, material=None):
"""Retrofits wall to German refurbishment standards.
This function adds an additional layer of insulation and sets the
thickness of the layer according to the retrofit standard in the
year of refurbishment. Refurbishment year must be newer then 1977
Note: To Calculate thickness and U-Value, the standard TEASER
coefficients for outer and inner heat transfer are used.
The used Standards are namely the Waermeschutzverordnung (WSVO) and
Energieeinsparverordnung (EnEv)
Parameters
----------
material : string
Type of material, that is used for insulation
year_of_retrofit : int
Year of the retrofit of the wall/building
"""
material, year_of_retrofit = self.initialize_retrofit(
material, year_of_retrofit)
calc_u = None
if 1977 <= year_of_retrofit <= 1981:
calc_u = 1.06
elif 1982 <= year_of_retrofit <= 1994:
calc_u = 0.6
elif 1995 <= year_of_retrofit <= 2001:
calc_u = 0.5
elif 2002 <= year_of_retrofit <= 2008:
calc_u = 0.45
elif 2009 <= year_of_retrofit <= 2013:
calc_u = 0.24
elif year_of_retrofit >= 2014:
calc_u = 0.24
self.set_insulation(material, calc_u, year_of_retrofit)