Source code for teaser.logic.buildingobjects.buildingphysics.window

# created June 2015
# by TEASER4 Development Team


from teaser.logic.buildingobjects.buildingphysics.buildingelement \
    import BuildingElement
import warnings


[docs]class Window(BuildingElement): """Window class This class holds information of a window and is a child of BuildingElement(). 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 Window to ThermalZone.windows. Default is None. Attributes ---------- internal_id : float Random id for the distinction between different elements. name : str Individual name construction_type : 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 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 Specific Attributes for Window g_value : float solar heat gain coefficient of Window a_conv : float relative convective heat emission because of absorption of short wave irradiation of inner side of Window according to VDI 6007 shading_g_total : float shaded g value of the window shading_max_irr : float threshold for automatic shading 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 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(Window, self).__init__(parent) self._g_value = 0.0 self._a_conv = 0.0 self._shading_g_total = 1.0 self._shading_max_irr = 0.0 self._tilt = 90.0 self._inner_convection = 2.7 self._inner_radiation = 5.0 self._outer_convection = 20.0 self._outer_radiation = 5.0
[docs] def calc_equivalent_res(self): """Equivalent resistance VDI 6007 Calculates the equivalent resistance of a wall according to VDI 6007 guideline. Parameters ---------- t_bt : int time constant according to VDI 6007 (default t_bt = 7) """ self.set_calc_default() number_of_layer, density, thermal_conduc, heat_capac, thickness = \ self.gather_element_properties() r_layer = thickness / thermal_conduc c_layer = heat_capac * density * thickness # *1000 for layer_count in r_layer: self.r1 += layer_count / self.area for layer_count in c_layer: self.c1 += layer_count
[docs] def replace_window(self, year_of_retrofit, window_type=None): """Replace a window, with a newer one. Replaces all attributes from the window and replaces it with a high insulated one. Parameters ---------- year_of_retrofit: int The year, the building was refurbished """ if window_type is None: window_type = "EnEv" else: pass if year_of_retrofit < 1995: year_of_retrofit = 1995 warnings.warn("You are using a year of retrofit not supported\ by teaser. We will change your year of retrofit to 1995\ for the calculation. Be careful!") self.set_calc_default() self.layer = None self.load_type_element(year_of_retrofit, window_type, self.parent.parent.parent.data)
@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__ == "Window": self.__parent.windows.append(self) else: raise ValueError('Instance of Window 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 @property def g_value(self): return self._g_value @g_value.setter def g_value(self, value): if isinstance(value, float): self._g_value = value elif value is None: self._g_value = value else: try: value = float(value) self._g_value = value except: raise ValueError("Can't convert g value to float") @property def a_conv(self): return self._a_conv @a_conv.setter def a_conv(self, value): if isinstance(value, float): self._a_conv = value elif value is None: self._a_conv = value else: try: value = float(value) self._a_conv = value except: raise ValueError("Can't convert a conv to float") @property def shading_g_total(self): return self._shading_g_total @shading_g_total.setter def shading_g_total(self, value): if isinstance(value, float): self._shading_g_total = value elif value is None: self._shading_g_total = value else: try: value = float(value) self._shading_g_total = value except: raise ValueError("Can't convert shaded g value to float") @property def shading_max_irr(self): return self._shading_max_irr @shading_max_irr.setter def shading_max_irr(self, value): if isinstance(value, float): self._shading_max_irr = value elif value is None: self._shading_max_irr = value else: try: value = float(value) self._shading_max_irr = value except: raise ValueError("Can't convert max irradiation to float")