Creating a good environment for the nZEB: - Knowledge ... the quality practice: - Learning from good practice in EU countries ... Vir: Euroinvest d.o.o.. - Different ...
Symposium energy efficiency in buildings Nearly zero-energy buildings in Slovenia Dr.Sc. Miha Praznik Building and Civil Engineering Institute ZRMK Ltd. Ljubljana, 20.3.2018
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Introduction About the company: - BCEI ZRMK Ltd. - DRI Investment Management Ltd. Nearly zero-energy buildings in Slovenia: - Stakeholders - A decade of good practice development - Requirements for co-financing projects - Action Plan and nZEB criteria 2015 - Attractive and rational solutions for nZEB - Business Challenges
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Stakeholders nZEB Creating a good environment for the nZEB: - Knowledge holders (BCEI ZRMK, FA UL, ...) - Consortium Associations (Passive House Co.) - Enterprises; Sections of Chamber of C&I - Investment co-financers (Eco Fund, MFI, ...) - Crediting of investments (banks, Eco Fund) - Legislative frameworks (MZI) - Public and private investors - Etc.
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Quality practice in nZEB´s Gradual development of the quality practice: - Learning from good practice in EU countries - From low-energy to passive new construction - Financial incentives of private projects - Intensive development of products & services - Partial and comprehensive energy renovation - Competitiveness in projects - Economic crisis and re-growth - Financial incentives of public projects - Requirements for more efficient construction - Comprehensive, sustainable and rational solutions
Diversity of house construction - Building passive houses: design, tradition, climate impact, adaptating solutions Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Vir: M. Praznik, GI ZRMK
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Adapting design for nZEB´s - Major changes: quality architecture, smaller surface area and floor levels, clear thermal zoning, structures, details, adequate products, thermal envelope, airtightness
Vir: Zelena gradnja d.o.o.
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
The quality of building houses - Quality requirements affect development: competitive services, certified products - From individual components to buildings:
Vir: LUMAR
Vir: Zelena gradnja d.o.o.
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
nZEB public buildings - Solutions for all types of public buildings - Adapted solutions for the environment and climate - From low-energy to passive public buildings - Tipisation of good design solutions - Defining rational energy concepts - Influence in the early planning phase Vir: Jelovica
First nZEB highrise
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
- Different characteristics and solutions
Vir: Euroinvest d.o.o.
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
First nZEB highrise
Vir: Euroinvest d.o.o.
Deep renovation of houses
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
- The most effective renovation of residential buildings is always comprehensive:
Vir: Eko sklad
Deep renovation of public build.
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
- Deep renovation of public buildings with passive components: Vir: M. Praznik, GI ZRMK Passivhaus Nachweis
Foto oder Zeichnung
Objekt: Standort und Klima: Straße: PLZ/Ort: Land: Objekt-Typ:
VVZ Manka Golarja - enota Kocljeva 2 Gornja Radgona Kocljeva 2 9250 Gornja Radgona Slovenija VVZ "X"
Murska Sobota
Bauherr(en): Straße: PLZ/Ort: Architekt: Straße: PLZ/Ort:
Passivhaus Nachweis
Gradbeni inštitut ZRMK d.o.o. Dimičeva 12 SI-1000 Ljubljana, Slovenia
Haustechnik: Straße: PLZ/Ort:
Foto oder Zeichnung
Baujahr:
1975
Zahl WE:
1
Umbautes Volumen Ve: Personenzahl:
3979.0
Innentemperatur: m3
Interne Wärmequellen:
21.0 5.5
118.0
°C W/m²
Objekt:
Standort und Klima: Straße:
Kennwerte mit Bezug auf Energiebezugsfläche Energiebezugsfläche:
PLZ/Ort:
881.00 Verwendet:
m2
Land: Objekt-Typ: PH-Zertifikat: Erfüllt?
Monatsverfahren
14 0.60
kWh/(m²a)
15 kWh/(m²a)
Drucktest-Ergebnis:
h-1
0.6 h-1
Primärenergie-Kennwert (WW, Heizung, Hilfs- u. Haushalts-Strom):
175
kWh/(m²a)
120 kWh/(m²a)
79
kWh/(m²a)
Energiekennwert Heizwärme:
Primärenergie-Kennwert (WW, Heizung und Hilfsstrom):
Heizlast: Übertemperaturhäufigkeit:
aStraße: a PLZ/Ort:
Architekt: q PLZ/Ort:
Straße: PLZ/Ort:
W/m²
4.2%
über
25
°C
Baujahr: Zahl WE:
Kennwert mit Bezug auf Nutzfläche nach EnEV
Umbautes Volumen Ve:
Nutzfläche nach EnEV:
1273.3
Primärenergie-Kennwert (WW, Heizung und Hilfsstrom):
54.8
m2
kWh/(m²a)
Gradbeni inštitut ZRMK d.o.o. Dimičeva 12 SI-1000 Ljubljana, Slovenia
Haustechnik:
kWh/(m²a)
14.5
Murska Sobota
Bauherr(en):
Straße:
Primärenergie-Kennwert Einsparung durch solar erzeugten Strom:
VVZ Manka Golarja - enota Kocljeva 4 Gornja Radgona Kocljeva 4 9250 Gornja Radgona Slovenija VVZ "L"
Personenzahl: Anforderung: Erfüllt?
q
1982 1 2460.0
Innentemperatur: m3
Interne Wärmequellen:
21.0 4.2
°C W/m²
106.0
Kennwerte mit Bezug auf Energiebezugsfläche 40 kWh/(m²a) Energiebezugsfläche:
898.00 Verwendet:
Energiekennwert Heizwärme: Drucktest-Ergebnis: Primärenergie-Kennwert (WW, Heizung, Hilfs- u. Haushalts-Strom):
Primärenergie-Kennwert (WW, Heizung und Hilfsstrom):
m2
18 0.60
kWh/(m²a)
108 49
kWh/(m²a)
Primärenergie-Kennwert Einsparung durch solar erzeugten Strom:
PH-Zertifikat: Erfüllt?
Monatsverfahren
15 kWh/(m²a)
-1
q
h
0.6 h-1
a
kWh/(m²a)
120 kWh/(m²a)
a
FLIR S y stems
13.1 °C 12
10
kWh/(m²a)
Heizlast:
13.6
Übertemperaturhäufigkeit:
1.6%
W/m² über
25
°C
8
Kennwert mit Bezug auf Nutzfläche nach EnEV Nutzfläche nach EnEV:
787.2
m2
Primärenergie-Kennwert (WW, Heizung und Hilfsstrom):
55.9
kWh/(m²a)
Anforderung: Erfüllt?
40 kWh/(m²a)
q
6.6
FLIR S y stems
Deep renovation of heritage
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
- A comprehensive approach to building renovation, including cultural heritage:
Vir: Eko sklad
- Stepping up the requirements for EE - Financial incentives of nZEB solutions - Good building practice > 160
– Minimum requirements for EE, – Good EE practice – Financial promotion of nZEB
160 140
QNH/Au [kWh/m2a]
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Criteria, practice, incentives
110
120 100
75
80 60 40 20 0
5-6 lit LEH
Družinska hiša v Ljubljani DD 3300 f0 0,6 1970
1980
1990
55 3-4 lit LEH 2000
48
2-3 lit LEH PH 2010
38 25 nZEB
2020
Incentives for residental buildings
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Eco Fund financial incentives for the nZEB: - New passive single family houses: construction or purchase, 150 m2 Qh (kWh/m2a) ≤ 10 ≤ 15
Maximal subsidy EUR/m2 Bio TI Min TI Syn TI 125 105
100 80
75 65
- Deep renovation of family houses: Deep renovationm, up to 200 m2
Maximal subsidy EUR/m2
Qh (kWh/m2a)
Bio & Min TI
Syn TI
≤ 25
200
165
- Multi-dwelling new buildings (100 €/m2) - Multi-dwelling renovations (150 €/m2)
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Incentives for public buildings Eco Fund financial incentives for the nZEB: - New construction, nZEB, of general social importance: Spodbuda v EUR na m2
-
Energijska učinkovitost Qh (kWh/m3a)
I. skupina
II. skupina
III. skupina
≤6
400
310
240
Qh < 6 kWh/m3a U < 0,15 W/m2K, Uwd < 0,9 W/m2K Efficiency in ventilation > 80% RES > 50%
- Measures of energy renovation on existing public buildings
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Incentives for new nZEB Eco Fund financial incentives for the nZEB single family houses: – Stricter requirements for efficiency, components and quality – 1,000 buildings, 10 years – Annually 100-150 houses 1%
26% ≤ 25
6%
6% ≤ 10
25% ≤ 20
32% ≤ 15
Vir: Eko sklad j.s.
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Incentives for new nZEB Eco Fund financial incentives for the nZEB single family houses: – Indirect impact of the intensity of cofinancing on the methods of building houses Biological TI Massive Mineral TI Wood Synthetic TI Other Vir: Eko sklad j.s.
3%
43%
34%
21%
54%
45% Mineral insulating materials Wooden construction prevails over predominate, followed by synthetic, the masonry the smallest share of natural ones
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Optimizing design of nZEB Small add-ons for higher added value: Low energy house = passive house – optimization
W From 1.1.2016 to 31.12.2016 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 Jan 0
Feb 1000
Mar
Apr
2000
May 3000
Jun 4000
Jul 5000
Aug
Sep 6000
Oct 7000
Nov
Dec
8000
AHU heating coil power, W
Vir: M. Praznik, GI ZRMK
Efficiency and economics
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
From "forbidden" to a good passive house: 45 kWh/m2a 10 kWh/m2a energ.effic. QNH/Au airtightness 1,3 h-1 0,5 h-1 recuperation 0% 93% floor 0,21 W/m2K 0,12 W/m2K wall 0,15 W/m2K 0,12 W/m2K roof 0,15 W/m2K 0,10 W/m2K ceiling 0,15 W/m2K 0,09 W/m2K loggia 0,17 W/m2K 0,12 W/m2K door 1,3 W/m2K 0,9 W/m2K windows 0,7/1,2 W/m2K 50% 0,6/0,9 W/m2K 60% desing basic detailed consulting no yes BD test no yes heat pump 6 kW 3 kW floor heating 100% 35% €/m2 860 950 € 133.300 147.250
I* 5% 48% 11% 9% 5% 3% 0,2% 3% 18% 6% 4% 4% -11% -5% 10%
Efficiency and synergy
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
The best solutions are not more expensive: – 100% the worst allowed new construction, – 85% new construction A1
+10%
-25%
-15%
Vir: M. Praznik, GI ZRMK
Rational house is attractive house
Efficiency and balance
Modeling and functionality 90 NPV (d=0%)
75 60
Variants and sensitivity
NPV (d=2%)
45
0,24
0,22
0,20
0,18
0,16
0,14
NPV (d=4%)
0,12
0,08
30 Economics and 15 0 suggestions
0,10
NSV (35a, d) [€/m2]
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Without optimization and rationalization there is no demand for better nZEB:
debljina ugrađene TI na fasadi [m]
Vir: M. Praznik, GI ZRMK
Optimization and rationalization
Dr. Miha PRAZNIK Nearly zero-energy buildings in Slovenia
Vir: M. Praznik, GI ZRMK
New kindergarten, 1.500 m2, 200 persons Construction with brick, mainly mineral thermal insulation Starting point: 65 kWh/m2a, 20 kWh/m3a, 1.150 €/m2 Optimization: 20 kWh/(m2a),