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ZEM dSZEMedS: Case studies
dCase study:ITC EINSTEIN High School AnconaITC EINSTEIN High School, Ancona, Italy
The sole responsibility for the content of this publication lies with the authors. It does not necessarily reflect the opinion of the European Union. Neither the EASME nor the European Commission are responsible for any use that may be made of the information contained therein.
August 2015
General data3
ITC EINSTEIN High School, Municipality of Loreto, Italy
Name of the School
ITC EINSTEIN Hi h S h l
Type of school
ITC EINSTEIN High School
Hi h S h lHigh School
Number of students Owner
public436
Location
Municipality of Loreto, Italy
Year of construction
19661966
4
General dataITC EINSTEIN Hi h S h l M i i li f L I l
Building typology Heated area (m2 )
ITC EINSTEIN High School, Municipality of Loreto, Italy
4 floors building 2998 m2
Site
Urban Plain
Heating degree days (base 18): 1897
Cooling degree days (base 26) 82Cooling degree days (base 26): 82
5
Current Situation
Renovation needs Building use
ITC EINSTEIN High School, Municipality of Loreto, Italy
High Priority: energy efficiency and building facade safetySchedule for High school:
Standard Use: From 9th of September till 14th of June
High Priority: energy efficiency and building facade safety.
Reduce Use: From 15th of June till 12th of August
From 19th of August till 6th of September
2nd, 3rd, 4th of January
12th, 16th of April
23rd, 24th, 27th, 30th , 31st of December
Standard Use: Monday till Thursday: 08:00 to 14:00 and Friday: 08:00 to 18:00
Reduce Use: Monday till Friday: 07:00 to 08:00Reduce Use: Monday till Friday: 07:00 to 08:00
Wednesday: 14:00 to 18:00
Friday: 14:00 to 15:00
6
Current SituationITC EINSTEIN Hi h S h l M i i li f L I l
Building envelope: WallsBrickwall with wall cavity
ITC EINSTEIN High School, Municipality of Loreto, Italy
U = 1 W/m².K
Building envelope: RoofRoof with insulation and waterproofing
U = 0.4 W/m².KU 0.4 W/m .K
Building envelope: GroundfloorGround floor consists of concrete
U = 0.9 W/m².K
Building envelope: WindowsSingle‐glazed windows with wooden frames
U 6 W/ ² KUw = 6 W/m².K
7
Current Situation
Airtightness: No measurements
H ti /C li 2 t l b il (347 kW) A d t f d b t d b il ( 31) l d th
ITC EINSTEIN High School, Municipality of Loreto, Italy
Heating/Cooling: 2 natural gas boilers (347 kW). A secondary system, fed by a separated boiler (cargomax 31) placed on theterrace roof (first level) provide heating to the gymnasium, through two wall mounted air heaters. All theother spaces of the school are heated through radiators, fed by the two boilers placed in the thermal central.At the ground floor, the distribution is not embedded in the walls/floors as in the other floors, but pipes arehung to the ceiling, in the corridors and in the classrooms, often not insulated.g g, ,
Ventilation: No mechanical VentilationVentilation by opening windows
8
Current Situation
Lighting: Mainly, fluorescent tubes controlled by users
ITC EINSTEIN High School, Municipality of Loreto, Italy
Appliances: Lab: PC, Projector, PrinterOffice: PC, Printer, Copy MachineGym: PC, Refrigerator, Dryer
DHW: DHW is present just in the Gym, managed through the CARGOMAX 31 boiler
Cooking: No cooking
9
Current Situation
Current final energy consumptionkWh/m2 conditioned area (from electricity
ITC EINSTEIN High School, Municipality of Loreto, Italy
bills, metering etc.):y
kWh/m2 y; 12
natural gas
kWh/m2 y; 193
Total of energy consumption (bills 2010‐2013): 614,949 kWh/year, 205 kWh/year m2 conditionedarea
Running cost:electricit
natural
y €/y ; 8148
gas €/y ; 65202
Energy (bills 2010‐2013): 65,202 €/year (natural gas), 8,148 €/year (electricity). VAT included.Water: no dataMaintenance: no data
10NZEB RenovationITC EINSTEIN High School, Municipality of Loreto, Italy
Design approach: Deep renovation towards ZEMedS nZEB Schools requeriments.
ZEMedS Goals: Requeriment 1: C Prod ≤ 0ZEMedS Goals: ‐ Requeriment 1: CPE‐ProdRES≤ 0
Primary energy consumption yearly (heating, cooling, ventillation, DHW and lighting) is produced by local renewable energies.
‐ Requeriment 2: C ≤ 25 kWh/m2 yRequeriment 2: CFE≤ 25 kWh/m2 y
FE consumption yearly (heating, cooling, ventillation and lighting) per conditioned area
‐ Requeriment 3: Indoor air quality guaranteed (CO2≤1000 ppm) and temperature above 28ºC ≤40 hoursyearly during occupancyyearly during occupancy
National factors for conversion in energy and CO2 have been taken into account (data 2014).
Methodology in energy simulations: Steps considered:
First step: 3 proposals (variant A, B and C) in envelope renovation: from less insulated to more insulated
Second step: 2 proposals for each variant:Renovation in lighting systemg g yRenovation in lighting system, heating and DHW system + installation of PV system+use of natural ventilationRenovation in lighting system, heating and DHW system + installation of PV system+use of mechanical ventilation without heat recovery l h h d ll f fRenovation in lighting system, heating and DHW system + installation of PV system+use of mechanical ventilation with heat recovery
11NZEB RenovationITC EINSTEIN High School, Municipality of Loreto, Italy
First step: 3 proposals (variant A, B and C) in envelope renovation: from less insulated to more insulated.
V i A V i V i CVariant A Variant B Variant C
Replacement of existing single glazing for:Variant A: low‐e double glazing, 16mm(air) and wooden frame (with thermal break) Ug=1 6 Uf= 2 2Uwindows and exterior doors 1.8 1.5 1.4 thermal break) . Ug=1.6 Uf= 2.2Variant B: low‐e double glazing, 16mm(argon) and wooden frame (with thermal break) . Ug=1.3 Uf= 2.2Variant C: low‐e double glazing, 16mm(argon) and wooden frame . Ug=1.3 Uf= 2.2
Step 1
Ug 1.3 Uf 2.2Solar protection Interior Curtains ‐
Uroof 0.3 0.22 0.15
Variant A: 3cm roof tiles with cool material coating and 4cm EPS attached Variant B: 3cm roof tiles with cool material coating and 7cm EPS attached Variant C 3cm roof tiles with cool material coating and 14cm EPS attached
Uwall 0.4 0.3 0.2
Variant A: External wall insulation 5cm EPS & plaster with cool coating Variant B: External wall insulation 8cm EPS & plaster with cool coating Variant C: External wall insulation 13cm EPS & plaster with cool coating
Ugroundfloor current ‐
12
NZEB RenovationITC EINSTEIN High School, Municipality of Loreto, Italy
Second step: 3 proposals for each variant A, B and C:Step 2.1: Renovation of heating and DHW system + installation of PV system + use of natural ventilationStep 2.2: Renovation of heating and DHW system + installation of PV system + use of mechanicalventilation without heat recoveryStep 2 3: Renovation of heating and DHW system + installation of PV system + use of mechanicalStep 2.3: Renovation of heating and DHW system + installation of PV system + use of mechanicalventilation with heat recovery
N t l V til ti Wi d i ( 0 008 3/ / )
Step 2.1
Natural Ventilation Windows open sceanrio ( 0,008 m3/sec/person)
Heating system Condensing boilers
Cooling system no cooling system
PV system 448m2 PV panels
Step 2.2
Mechanical Ventilation Ventilation systems without heat recovery (control when occupancy) 6.5 l/s person
Heating system Condensing boilers
Cooling system no cooling system
PV system 670m2 PV panels
Step 2.3
Mechanical Ventilation Ventilation systems without heat recovery (control when occupancy) 6.5 l/s person, 70% heat recovery
Heating system Condensing boilersl lCooling system no cooling system
PV system 496m2 PV panels
13
NZEB RenovationITC EINSTEIN High School, Municipality of Loreto, Italy
Italian Regulation:
14
NZEB Renovation
FINAL ENERGY:
ITC EINSTEIN High School, Municipality of Loreto, Italy
134 129
105 100100120140160
2
ZEMedS requirements (heating, cooling, vent. & lighting)
National Regulation
VARIANT A 25 205 5
66 62
5 5
75 70
50
20406080
100
kWh/m2 National Regulation
step 1 & step 2.1
step 1 & step 2.2
step 1 & step 2.1 : 66 kWh/m² in final energy
step 1 & step 2.2 : 105 kWh/m² in final energy
step 1 & step 2.3 : 75 kWh/m² in final energy
Total ZEMedS Heating, cooling & ventilation
Lighting step 1 & step 2.3
Cooling; 0
Ventilation; 0
Lighting; 5e e gy
Cooling; 0
Ventilation; 0
Lighting; 5
final energy
Cooling; 0
Ventilation; 0
Lighting; 5
energy
193250 Primary energy of existing building kWhpe/m².y (h i li h i li ) d f bill
Heating; 62
Heating; 100
Heating; 70
PRIMARYENERGY:
86 79118
88‐79
‐119 ‐87‐38 ‐57 ‐42
‐500
50100150200
ng p 1 ep
ep
ep
(heating, lighting, DHW, appliances) data from bills
Primary energy for non renewable energy consumption kWhpe/m².y (heating, ventilation, lighting and DHW) (data from simulation)
‐150‐10050
Existing bu
ildi
ste p
step
1 &
ste
2.1
step
1 &
ste
2.2
step
1 &
ste
2.3 Primary Energy predicted by RES kWh/m2 y covering
heating, vent. , lighting, DHW (data from simulation)
15
NZEB RenovationITC EINSTEIN High School, Municipality of Loreto, Italy
FINAL ENERGY: 134 129
104 100120140160
ZEMedS requirements (heating, cooling, vent. & lighting)
VARIANT B 25 205 5
65 60
5 5
74 69
50
20406080
100
kWh/m2 National Regulation
step 1 & step 2.1
step 1 & step 2.20
Total ZEMedS Heating, cooling & ventilation
Lighting step 1 & step 2.3
step 1 & step 2.1 : 65 kWh/m² in final energy
step 1 & step 2.2 : 104 kWh/m² in final energy
step 1 & step 2.3 : 74 kWh/m² in final energy
Ventilation; 0
Lighting; 5
energy
Cooling; 0
Ventilation; 0
Lighting; 5
final energy
Cooling; 0
Ventilation; 0
Lighting; 5
energy
193250 Primary energy of existing building kWhpe/m².y
Heating; 60Cooling; 0
Heating; 99
Heating; 69
PRIMARYENERGY:
193
84 78117
87
‐77 ‐117 ‐87‐37 ‐56 ‐42
‐500
50100150200
ng p 1 ep
ep
ep
y gy g g p y(heating, lighting, DHW, appliances) data from bills
Primary energy for non renewable energy consumption kWhpe/m².y (heating, ventilation, lighting and DHW) (data from simulation)
‐150‐10050
Existing bu
ildin
step
step
1 &
ste
2.1
step
1 &
ste
2.2
step
1 &
ste
2.3 Primary Energy predicted by RES kWh/m2 y covering
heating, vent. , lighting, DHW (data from simulation)
16
NZEB RenovationITC EINSTEIN High School, Municipality of Loreto, Italy
FINAL ENERGY: 134 129
104 99120140160
ZEMedS requirements (heating, cooling, vent. & lighting)
VARIANT C 25 205 5
64 59
5
99
5
73 68
50
20406080
100
kWh/m2 National Regulation
step 1 & step 2.1
step 1 & step 2.20
Total ZEMedS Heating, cooling & ventilation
Lighting step 1 & step 2.3
step 1 & step 2.3 : 73 kWh/m² in final step 1 & step 2.2 : 104 kWh/m² in fi l
step 1 & step 2.1 : 64 kWh/m² in final
Cooling; 0
Ventilation; 0
Lighting; 5
energy
Cooling; 0
Ventilation; 0
Lighting; 5final energy
Ventilation; 0
Lighting; 5
energy
193250 Primary energy of existing building kWhpe/m² y
Heating; 68
Heating; 99
Heating; 59
Cooling; 0
PRIMARYENERGY:
193
81 76117
86
‐77‐117 ‐85
‐37 ‐56 ‐410
50100150200250
g 1 p p p Primary energy of existing building kWhpe/m².y (heating, lighting, DHW, appliances) data from bills
Primary energy for non renewable energy consumption kWhpe/m².y (heating, ventilation, lighting and DHW) (data from simulation)
‐150‐100‐50
Existing bu
ilding
step
1
step
1 &
step
2.1
step
1 &
ste p
2.2
step
1 &
ste p
2.3
lighting and DHW) (data from simulation)
Primary Energy predicted by RES kWh/m2 y covering heating, vent. , lighting, DHW (data from simulation)
17
NZEB Renovation
Global cost and paybacks for the renovation scenarios:
ITC EINSTEIN High School, Municipality of Loreto, Italy
p y
Calculations based on:• Average yearly increase in gas price*: 3.9 % (data from 2003 to 2014)• Average yearly increase in electricity price**: 2.5 % (data from 2003 to 2014)
• Overall cost of gas: 65,202 €/year (VAT included)• Overall cost of electricity: 8,148 €/year (VAT included)• Considered an overall maintenance cost of the renovation scenarios (yearly percentage of the total cost of the renewals) in 0.5% (envelope measures), 2% (heating systems and PV)• Replacement assumed in lighting (15‐20 years lifetime)
• Average inflation considered in 1.8% (from 10 years average data)
Overall maintenance yearly percentage of total cost of investment.All construction costs (prices at 2014) in renovation scenarios include assembling, disassembling and daily amortization of scaffold are included.Sources for cost data are gathered from using of existing cost database which have been derived from market‐based data gathering, evaluating of recent projects, and analyzing of standard offers of construction companies.
*Source: http://ec.europa.eu/eurostat/tgm/table.do?tab=table&init=1&language=en&pcode=ten00117&plugin=1** Source: http://ec.europa.eu/eurostat/tgm/table.do?tab=table&init=1&plugin=1&language=en&pcode=ten00118
18
NZEB Renovation
Paybacks for the renovation implemented in steps (every 4 years):
ITC EINSTEIN High School, Municipality of Loreto, Italy
Expectedsavings in
gas
Expectedsavings in electrcicity
Overall cost of gas €/year
Overall cost of
electricity €/year
Investmentin €
Overallmaintenan
cecost €/year
Cost of replacemen
t in € Items to be replacedPayback(years)
step 1 ‐ var A (windows & ext. doors & walls & roofs) 54% 0% 29.706 € 8.148 € 876.478 € 930 € 0 € ‐ 17step 1 ‐ var B (windows & ext. doors & walls & roofs) 56% 0% 28.844 € 8.148 € 918.278 € 930 € 0 € ‐ 17step 1 ‐ var C (windows & ext. doors & walls & roofs) 57% 0% 27.778 € 8.148 € 994.065 € 930 € 0 € ‐ 19step 2.1 ‐ boiler + nat. vent. + PV system (var A) 9% 33% 26.359 € 5.445 € 163.388 € 1.614 € 57.367 € gas boiler (15 years)/inversors
PV (15 years lifetime) 39
t 2 1 b il t t PV b il (15 )/istep 2.1 ‐ boiler + nat. vent. + PV system (var B) 8% 33% 26.445 € 5.445 € 160.388 € 1.614 € 56.999 € gas boiler (15 years)/inversors
PV (15 years lifetime) 39
step 2.1 ‐ boiler + nat. vent. + PV system (var C) 6% 33% 26.997 € 5.445 € 160.388 € 1.614 € 56.999 € gas boiler (15 years)/inversors
PV (15 years lifetime) 40
step 2.2 ‐ boiler + mechanical vent. + PV system (var A) ‐43% 33% 41.211 € 5.445 € 352.903 € 3.509 € 64.911 € gas boiler (15 years)/inversors
PV (15 years lifetime) >50
step 2 2 boiler + mechanical vent + gas boiler (15 years)/inversorsstep 2.2 ‐ boiler + mechanical vent. + PV system (var B) ‐46% 33% 42.105 € 5.445 € 349.903 € 3.509 € 64.543 € gas boiler (15 years)/inversors
PV (15 years lifetime) >50
step 2.2 ‐ boiler + mechanical vent. + PV system (var C) ‐51% 33% 43.504 € 5.445 € 349.903 € 3.509 € 64.543 € gas boiler (15 years)/inversors
PV (15 years lifetime) >50
step 2.3 ‐ boiler + MVHR + PV system(var A) ‐3% 33% 29.732 € 5.445 € 341.478 € 2.724 € 59.023 € gas boiler (15 years)/inversors
PV (15 years lifetime) >50
step 2 3 boiler + MVHR + PV system gas boiler (15 years)/inversors
T t l b k i ll i t i 50 t f i t ith t l til ti
step 2.3 ‐ boiler + MVHR + PV system(var B) ‐4% 33% 29.995 € 5.445 € 341.478 € 2.724 € 59.023 € gas boiler (15 years)/inversors
PV (15 years lifetime) >50
step 2.3 ‐ boiler + MVHR + PV system(var C) ‐7% 33% 30.821 € 5.445 € 338.478 € 2.724 € 58.655 € gas boiler (15 years)/inversors
PV (15 years lifetime) >50
Total payback in all variants is > 50 years, except for variants with natural ventilation.
Overall maintenance yearly percentage of the total cost of the investment.All construction costs (prices at 2014) in the renovation scenarios include assembling, disassembling and daily amortization of scaffold are included in wall insulation costs. VAT included.
19
NZEB Renovation
Paybacks for the renovation implemented in steps (every 4 years):Values in m2 conditioned area
ITC EINSTEIN High School, Municipality of Loreto, Italy
Expectedsavings in
gas
Expectedsavings in electrcicity
Overall cost of gas
€/year m2
Overall cost of
electricity €/year m2
Investmentin €/m2
Overall maintenanc
ecost €/year
m2
Cost of replacement in €/m2 Items to be replaced
Payback(years)
t 1 A ( i d & t dstep 1 ‐ var A (windows & ext. doors & walls & roofs) 54% 0% 10 € 3 € 292 € 0 € 0 € ‐ 17step 1 ‐ var B (windows & ext. doors & walls & roofs) 56% 0% 10 € 3 € 306 € 0 € 0 € ‐ 17step 1 ‐ var C (windows & ext. doors & walls & roofs) 57% 0% 9 € 3 € 332 € 0 € 0 € ‐ 19step 2 1 boiler + nat vent + PV gas boiler (15 years)/inversors PVstep 2.1 ‐ boiler + nat. vent. + PV system (var A) 9% 33% 9 € 2 € 54 € 1 € 19 € gas boiler (15 years)/inversors PV
(15 years lifetime) 39
step 2.1 ‐ boiler + nat. vent. + PV system (var B) 8% 33% 9 € 2 € 53 € 1 € 19 € gas boiler (15 years)/inversors PV
(15 years lifetime) 39
step 2.1 ‐ boiler + nat. vent. + PV system (var C) 6% 33% 9 € 2 € 53 € 1 € 19 € gas boiler (15 years)/inversors PV
(15 years lifetime) 40
step 2 2 boiler + mechanical vent gas boiler (15 years)/inversors PVstep 2.2 ‐ boiler + mechanical vent. + PV system (var A) ‐43% 33% 14 € 2 € 118 € 1 € 22 € gas boiler (15 years)/inversors PV
(15 years lifetime) >50
step 2.2 ‐ boiler + mechanical vent. + PV system (var B) ‐46% 33% 14 € 2 € 117 € 1 € 22 € gas boiler (15 years)/inversors PV
(15 years lifetime) >50
step 2.2 ‐ boiler + mechanical vent. + PV system (var C) ‐51% 33% 15 € 2 € 117 € 1 € 22 € gas boiler (15 years)/inversors PV
(15 years lifetime) >50
step 2 3 boiler + MVHR + PV gas boiler (15 years)/inversors PVstep 2.3 ‐ boiler + MVHR + PV system (var A) ‐3% 33% 10 € 2 € 114 € 1 € 20 € gas boiler (15 years)/inversors PV
(15 years lifetime) >50
step 2.3 ‐ boiler + MVHR + PV system (var B) ‐4% 33% 10 € 2 € 114 € 1 € 20 € gas boiler (15 years)/inversors PV
(15 years lifetime) >50
step 2.3 ‐ boiler + MVHR + PV system (var C) ‐7% 33% 10 € 2 € 113 € 1 € 20 € gas boiler (15 years)/inversors PV
(15 years lifetime) >50
Total payback in all variants is > 50 years, except for variants with natural ventilation.Overall maintenance yearly percentage of the total cost of the investment.All construction costs (prices at 2014) in the renovation scenarios include assembling, disassembling and daily amortization of scaffold are included in wall insulation costs. VAT included.
20
NZEB Renovation
In graphics, global cost of step 1:
ITC EINSTEIN High School, Municipality of Loreto, Italy
g p g p
0510400
500
€/m²
Maintenance costs €/m2 year101520253035100
200
300
400
Confort
Globa
l costs en € Maintenance costs €/m2 year
Energy price (electricity) €/m2 year
Energy price (diesel) €/m2 year
Cost of replacement €/m235400
Existing building step 1 ‐ var A (windows & ext. doors & walls &
roofs)
step 1 ‐ var B (windows & ext. doors & walls &
roofs)
step 1 ‐ var C (windows & ext. doors & walls &
roofs)
G Investment €/m2
Confort (numbers of hours > 28ºC)
Number of hours of overheating over 28ºC for renovated buildings are expected to be zero.
21
NZEB Renovation
In graphics, global cost of step 2.1:
ITC EINSTEIN High School, Municipality of Loreto, Italy
g p g p
0510150
200
€/m²
Maintenance costs €/m2 year101520253035
50
100
150
Comfort
Globa
l costs en € Maintenance costs €/m2 year
Energy price (electricity) €/m2 year
Energy price (diesel) €/m2 year
Cost of replacement €/m235400
Existing building step 2.1 ‐ boiler + nat. vent. + PV system (var
A)
step 2.1 ‐ boiler + nat. vent. + PV system (var
B)
step 2.1 ‐ boiler + nat. vent. + PV system (var
C)
G Investment €/m2
Comfort (numbers of hours > 28ºC)
Number of hours of overheating over 28ºC for renovated buildings are expected to be zero.
The replacement of the gas boilers have been considered in the cost of replacement of the existing building. There is no information of the costs in maintenance concerning the existing building.
22
NZEB Renovation
In graphics, global cost of step 2.2:
ITC EINSTEIN High School, Municipality of Loreto, Italy
g p g p
051015200
250
300
tn €/m²
Maintenance costs €/m2 year1520253035400
50
100
150
200
Comfort
Globa
l costs en
Energy price (electricity) €/m2 year
Energy price (diesel) €/m2 year
Cost of replacement €/m2
Investment €/m2400Existing building step 2.2 ‐ boiler +
mechanical vent. + PV system (var A)
step 2.2 ‐ boiler + mechanical vent. + PV
system (var B)
step 2.2 ‐ boiler + mechanical vent. + PV
system (var C)
Investment €/m2
Confort (numbers of hours > 28ºC)
Number of hours of overheating over 28ºC for renovated buildings are expected to be zero.
The replacement of the gas boilers have been considered in the cost of replacement of the existing building. There is no information of the costs in maintenance concerning the existing building.
23
NZEB Renovation
In graphics, global cost of step 2.3:
ITC EINSTEIN High School, Municipality of Loreto, Italy
g p g p
0510
250
300
€/m²
Maintenance costs €/m2 year1015202530
50
100
150
200
Confort
Globa
l costs en €
Energy price (electricity) €/m2 year
Energy price (diesel) €/m2 year
Cost of replacement €/m2
I t t €/ 235400
50
Existing building step 2.3 ‐ boiler + MVHR + PV system (var A)
step 2.3 ‐ boiler + MVHR + PV system (var B)
step 2.3 ‐ boiler + MVHR + PV system (var C)
G Investment €/m2
Confort (numbers of hours > 28ºC)
Number of hours of overheating over 28ºC for renovated buildings are expected to be zero.
The replacement of the gas boilers have been considered in the cost of replacement of the existing building. There is no information of the costs in maintenance concerning the existing buildingmaintenance concerning the existing building.
24
NZEB Renovation
Paybacks for the renovation implemented all at once (step 1 + steps 2):
ITC EINSTEIN High School, Municipality of Loreto, Italy
Expectedsavings in
gas
Expectedsavings in electrcicity
Overall cost of gas €/year
Overall cost of electricity
€/yearInvestment
in €
Overallmaintenanc
ecost €/year
Cost of replacement
in € Items to be replacedPayback(years)
step 1+ step 2.1 (var A) 58% 33% 27.147 € 5.445 € 1.039.867 € 5.455 € 152.750 € gas boiler (15 years)/inversors PV (15 years lifetime) 22p p ( ) (15 years lifetime)
step 1+ step 2.1 (var B) 59% 33% 26.445 € 5.445 € 1.078.666 € 5.455 € 152.410 € gas boiler (15 years)/inversors PV (15 years lifetime) 22
step 1+ step 2.1 (var C) 60% 33% 25.999 € 5.445 € 1.154.453 € 5.455 € 152.410 € gas boiler (15 years)/inversors PV (15 years lifetime) 23
step 1+ step 2 2 (var A) 35% 33% 42 443 € 5 445 € 1 229 381 € 6 403 € 159 720 € gas boiler (15 years)/inversors PV 36step 1+ step 2.2 (var A) 35% 33% 42.443 € 5.445 € 1.229.381 € 6.403 € 159.720 € (15 years lifetime) 36
step 1+ step 2.2 (var B) 35% 33% 42.105 € 5.445 € 1.268.181 € 6.403 € 159.380 € gas boiler (15 years)/inversors PV (15 years lifetime) 36
step 1+ step 2.2 (var C) 36% 33% 41.896 € 5.445 € 1.343.967 € 6.403 € 159.380 € gas boiler (15 years)/inversors PV (15 years lifetime) 37
gas boiler (15 years)/inversors PVstep 1+ step 2.3 (var A) 53% 33% 30.621 € 5.445 € 1.217.957 € 6.350 € 154.280 € gas boiler (15 years)/inversors PV (15 years lifetime) 26
step 1+ step 2.3 (var B) 54% 33% 29.995 € 5.445 € 1.259.756 € 6.350 € 154.280 € gas boiler (15 years)/inversors PV (15 years lifetime) 26
step 1+ step 2.3 (var C) 54% 33% 29.681 € 5.445 € 1.332.543 € 6.350 € 153.940 € gas boiler (15 years)/inversors PV (15 years lifetime) 27
Total paybacks in variants with natural ventilation is expected in 22‐23 years. Total paybacks in variants with mechanical ventilation is expected in 36‐37 years. Total paybacks in variants with mechanical ventilation with heat recovery is expected in 26‐27 years.
Overall maintenance yearly percentage of the total cost of the investment.All construction costs (prices at 2014) in the renovation scenarios include assembling, disassembling and daily amortization of scaffold are included in wall insulation costs. VAT included.
25
NZEB Renovation
Paybacks for the renovation implemented all at once (step 1 + steps 2):Values in m2 conditioned area
ITC EINSTEIN High School, Municipality of Loreto, Italy
Expectedsavings in
gas
Expectedsavings in electrcicity
Overall cost of gas €/m2
year
Overall cost of electricity €/m2 year
Investmentin €/m2
Overall maintenanc
ecost €/m2
year
Cost of replacement
in €/m2 Items to be replacedPayback(years)
step 1+ step 2.1 (var A) 58% 33% 9,1 € 1,8 € 347 € 2 € 51 € gas boiler (15 years)/inversors PV (15 years lifetime) 22
step 1+ step 2.1 (var B) 59% 33% 8,8 € 1,8 € 360 € 2 € 51 € gas boiler (15 years)/inversors PV (15 years lifetime) 22
step 1+ step 2.1 (var C) 60% 33% 8,7 € 1,8 € 385 € 2 € 51 € gas boiler (15 years)/inversors PV (15 years lifetime) 23(15 years lifetime)
step 1+ step 2.2 (var A) 35% 33% 14,2 € 1,8 € 410 € 2 € 53 € gas boiler (15 years)/inversors PV (15 years lifetime) 36
step 1+ step 2.2 (var B) 35% 33% 14,0 € 1,8 € 423 € 2 € 53 € gas boiler (15 years)/inversors PV (15 years lifetime) 36
step 1+ step 2.2 (var C) 36% 33% 14,0 € 1,8 € 448 € 2 € 53 € gas boiler (15 years)/inversors PV (15 lif ti ) 37p p ( ) , , (15 years lifetime)
step 1+ step 2.3 (var A) 53% 33% 10,2 € 1,8 € 406 € 2 € 51 € gas boiler (15 years)/inversors PV (15 years lifetime) 26
step 1+ step 2.3 (var B) 54% 33% 10,0 € 1,8 € 420 € 2 € 51 € gas boiler (15 years)/inversors PV (15 years lifetime) 26
step 1+ step 2 3 (var C) 54% 33% 9 9 € 1 8 € 444 € 2 € 51 € gas boiler (15 years)/inversors PV 27
Total paybacks in variants with natural ventilation is expected in 22‐23 years. Total paybacks in variants with mechanical ventilation is expected in 36‐37 years.
step 1+ step 2.3 (var C) 54% 33% 9,9 € 1,8 € 444 € 2 € 51 € g ( y )/(15 years lifetime) 27
Total paybacks in variants with mechanical ventilation with heat recovery is expected in 26‐27 years.Overall maintenance yearly percentage of the total cost of the investment.All construction costs (prices at 2014) in the renovation scenarios include assembling, disassembling and daily amortization of scaffold are included in wall insulation costs. VAT included.
26
NZEB Renovation
In graphics, global cost of renovation all at once for step 1+ step 2.1:
ITC EINSTEIN High School, Municipality of Loreto, Italy
g p g p p
0
5800
1000
m² Maintenance costs €/m2 year10
15
20
25400
600
800
Confort
bal costs en €/m Maintenance costs €/m2 year
Energy price (electricity) €/m2 year
Energy price (diesel) €/m2 year
Cost of replacement €/m2
30
35
400
200
Existing building step 1+ step 2.1 (var A) step 1+ step 2.1 (var B) step 1+ step 2.1 (var C)
Glob
Investment €/m2
Confort (numbers of hours > 28ºC)
Number of hours of overheating over 28ºC for renovated buildings are expected to be zero.
The replacement of the gas boilers have been considered in the cost of replacement of the existing building. There is no information of the costs in maintenance concerning the existing building.
27
NZEB Renovation
In graphics, global cost of renovation all at once for step 1+ step 2.2:
ITC EINSTEIN High School, Municipality of Loreto, Italy
g p g p p
0
5
10800
1000
/m² Maintenance costs €/m2 year
15
20
25
30200
400
600
Confort
loba
l costs en €/ Energy price (electricity) €/m2 year
Energy price (diesel) €/m2 year
Cost of replacement €/m2
Investment €/m235
400
200
Existing building step 1+ step 2.2 (var A) step 1+ step 2.2 (var B) step 1+ step 2.2 (var C)
Gl Investment €/m2
Confort (numbers of hours > 28ºC)
Number of hours of overheating over 28ºC for renovated buildings are expected to be zero.
The replacement of the gas boilers have been considered in the cost of replacement of the existing building. There is no information of the costs in maintenance concerning the existing building.
28
NZEB Renovation
In graphics, global cost of renovation all at once for step 1+ step 2.1:
ITC EINSTEIN High School, Municipality of Loreto, Italy
g p g p p
0
5800
1000
m² Maintenance costs €/m2 year10
15
20
25400
600
800
Confort
bal costs en €/m Maintenance costs €/m2 year
Energy price (electricity) €/m2 year
Energy price (diesel) €/m2 year
Cost of replacement €/m2
30
35
400
200
Existing building step 1+ step 2.1 (var A) step 1+ step 2.1 (var B) step 1+ step 2.1 (var C)
Glob
Investment €/m2
Confort (numbers of hours > 28ºC)
Number of hours of overheating over 28ºC for renovated buildings are expected to be zero.
The replacement of the gas boilers have been considered in the cost of replacement of the existing building. There is no information of the costs in maintenance concerning the existing building.
29
NZEB Renovation
Current situation:
ITC EINSTEIN High School, Municipality of Loreto, Italy
gas electricitygas electricityconsumption (kWh) Ratio (kWh/m2) consumption (kWh) Ratio (kWh/m2)
Real (bills) 578614 193 36335 12Simulation (Open studio+Energyplus) 495343 165 43755 15
Results of nZEB renovation under ZEMedS goals:
result 1 result 2 result 3
envelope + ventilation with envelope + ventilation with envelope + ventilation with
Renovation implemented with energy efficiency measures in
envelope + ventilation withnatural ventilation + heatingsystem (condensing boiler)+ PV system covering (heating,
lighting, ventilation)
envelope + ventilation with mechanical ventilation +
heating system (condensing boiler)+ PV system covering (heating, lighting, ventilation)
mechanical ventilation with heat recovery + heating system
(condensing boiler)+ PV system covering (heating, lighting,
ventilation)
Energy balance in PE (kWh/m2 y) (heating, cooling, vent., Var A 0 113924/38 0 170886/57 1 125916/42DHW & lighting) and RES production (kWh and kWh/m2 conditioned area)(ZEMedS requirement 1) (simulations)
Var B 1 110926/37 1 167888/56 ‐1 125916/42
Var C ‐1 110926/37 0 167888/56 0 122918/41
Energy result in FE (kWh/m2 y) (heating, cooling, vent. & lighting) per conditioned area (ZEMedS requirement 2)
Var A 66 105 75Var B 65 104 74
(simulations) Var C 64 104 73
Goal of (ZEMedS requirement 3)
‐ natural ventilation by opening windows (no indoor quality guaranteed)‐ predicted temperatures above 28ºC in less than 40
‐ indoor quality guaranteed by mechanical ventilation‐ predicted temperatures above 28ºC in less than 40 hours/year
‐ indoor quality guaranteed by mechanical ventilation‐ predicted temperatures above 28ºC in less than 40 hours/year
hours/year hours/year y
Paybacks (years) step by step implementation >50 (except for natural ventilation)Paybacks (years) all at once implementation 22‐23 36‐37 26‐27