Urban Renovation: An Opportunity for Economic Development …
129
However, the most important local energy source is that relating to the operating
WWTP. Despite not being already exploited, the plant treats about 150 million m
3
per year of wastewater that can be considered as a:
– source of heat by waste or treated water;
– source of biogas in the case of anaerobic digestion of the sludge;
– source of power (or heat and power in cogeneration) in the case of biogas use in
engine
2 ;
– source of bio-methane in the case of upgrading of the biogas;
– source of power in the case of PV integration on the components.
Considering only the heating season, about 157 GWh could be made available
by the WWTP to heat pumps, and supplying about 79 GWh of electricity, about 236
GWh could be made available as heating for buildings.
Another interesting source of heat could be the sewer collector (SC) located near
Cascina Nosedo, since its temperature is generally between 10 and 20 °C, all year
round. Considering only the heating season, about 37 GWh could be made available
for heat pumps, and suppling about 19 GWh of electricity, about 56 GWh could be
made available as heating for buildings.
2.1 Cascina Nosedo Renovation
The ancient farmhouse Cascina Nosedo (its origins date back to 1600 AD) is made
up of 11 protected buildings around a courtyard. In the UIA-OpenAgri proposal, two
buildings (called B9 and B10 in the following) were foreseen to undergo the energy
retrofit (Fig. 3). Hence, to assess the feasibility of implementing energy efficiency
measures and of the local RES integration, consistently with the protected buildings
constraints, a conservation status survey was carried out to identify the elements and
materials to be kept unaltered or restored.
A building retrofit scenario was proposed (Caputo et al. 2018) consisting of the
replacement of windows and roofs and the opaque envelope insulation from the outer
side. However, based on the Superintendence’s opinion, an alternative retrofit solution, regarding the insulation from the inner side of the walls, was defined. Both
retrofit scenarios, having 10-cm wood fiber panels and the same thermal transmittance, have been assessed.
A building energy model was developed with the IESVE tool, by adopting hourly
data on internal gains, ventilation rates, and domestic hot water (DHW) from the swiss
technical workbook SIA 2024 for five thermal zones (kitchen, restaurant, laboratory,
expo/conference room, and office).
2 Sludge anaerobic digestion with Combined Heat and Power (CHP) has been adopted in some
WWTPs.
129
However, the most important local energy source is that relating to the operating
WWTP. Despite not being already exploited, the plant treats about 150 million m
3
per year of wastewater that can be considered as a:
– source of heat by waste or treated water;
– source of biogas in the case of anaerobic digestion of the sludge;
– source of power (or heat and power in cogeneration) in the case of biogas use in
engine
2 ;
– source of bio-methane in the case of upgrading of the biogas;
– source of power in the case of PV integration on the components.
Considering only the heating season, about 157 GWh could be made available
by the WWTP to heat pumps, and supplying about 79 GWh of electricity, about 236
GWh could be made available as heating for buildings.
Another interesting source of heat could be the sewer collector (SC) located near
Cascina Nosedo, since its temperature is generally between 10 and 20 °C, all year
round. Considering only the heating season, about 37 GWh could be made available
for heat pumps, and suppling about 19 GWh of electricity, about 56 GWh could be
made available as heating for buildings.
2.1 Cascina Nosedo Renovation
The ancient farmhouse Cascina Nosedo (its origins date back to 1600 AD) is made
up of 11 protected buildings around a courtyard. In the UIA-OpenAgri proposal, two
buildings (called B9 and B10 in the following) were foreseen to undergo the energy
retrofit (Fig. 3). Hence, to assess the feasibility of implementing energy efficiency
measures and of the local RES integration, consistently with the protected buildings
constraints, a conservation status survey was carried out to identify the elements and
materials to be kept unaltered or restored.
A building retrofit scenario was proposed (Caputo et al. 2018) consisting of the
replacement of windows and roofs and the opaque envelope insulation from the outer
side. However, based on the Superintendence’s opinion, an alternative retrofit solution, regarding the insulation from the inner side of the walls, was defined. Both
retrofit scenarios, having 10-cm wood fiber panels and the same thermal transmittance, have been assessed.
A building energy model was developed with the IESVE tool, by adopting hourly
data on internal gains, ventilation rates, and domestic hot water (DHW) from the swiss
technical workbook SIA 2024 for five thermal zones (kitchen, restaurant, laboratory,
expo/conference room, and office).
2 Sludge anaerobic digestion with Combined Heat and Power (CHP) has been adopted in some
WWTPs.