Associate Professor Cătălin LUNGU PhD, FII-UTCB & AIIR · Prof.ass.dr.eng. Cătălin LUNGU...

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Prof.ass.dr.eng. Cătălin LUNGU Lect.dr.eng. Raluca TEODOSIU

Arch. Mădălina IORDĂCHESCU Eng. Ionela ION 1

FIRST ROMANIAN PUBLIC NZEB PROPOSAL FOR A FUTURE EU PROJECT

Associate Professor Cătălin LUNGU PhD, FII-UTCB & AIIR

SOURCE: REHVA NZEB TC

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SUMMARY

1. GENERAL CONTEXT & RO-NZEB CONSORTIUM

2. ARCHITECTURE & STRUCTURAL CONCEPT

4. PROPOSALS FOR MECHANICAL EQUIPMENTS

3. ENERGY CONSUMPTION-ESTIMATION

5. FINANCIAL ESTIMATIONS

6. CONCLUSIONS

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1a. General context • EU/2010/31 Directive and VERY NEW law 159/2013

• no definition of Romanian NZEB (ongoing task of ICECON)

• no definition and procedure for optimal cost calculation

• no already certified PASSIVE building constructed in Romania

• no national strategy according to provisions of EU/27&31 Directives

• approx. 10 green office/coomercial buildings LEED or BREEAM

• only one research about bioclimatic buildings

• 3 national programmes for the refurbishment of residential buildings

(OUG 69/2010, OUG 63/2012 and HG 1160/2012 POR) – success rate volatile !!!

• average energy consumption of RO building stock twice at least compared to the EU average level

• approx. 2bln Euro funds for 2014-2020 to be spent for energy efficiency in RO

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1b. RO-NZEB CONSORTIUM

?! NOT YET COMPANIES FOR MECHANICAL EQUIPMENT ?!

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2. Architecture concept (1)

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• footprint ~ 200-250 sqm

• height: U+GF+5S

• ventilated double-skin facade

• outside opaque walls with YTONG,

rockwool and alubond

• three-layers windows

(U=0,9W/m2K, g=0,6, float, e-low)

• green roof

• green-house emmbeded

• light inside walls (open spaces)

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NORTH-WEST VIEW

N

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NORTH VIEW

N

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SOUTH-WEST VIEW

N

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EAST VIEW

N

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GROUND FLOOR

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CURRENT FLOOR

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Vth (LAST) FLOOR

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Superstructure - metal frame with

metal pillars and metal beams,

cross-beams against wind, rein-

forced concrete floors, shaped on

pleated metal sheet.

Infrastructure – reinforced

concrete with general foundation.

(recycling principle)

2. Structural concept (5)

M1-0,503s M2-0,474s M3-0,295s

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3. Energy consumption-estimation

Building component type RO-NZEB C107

U’ [W/m2K]

U’min [W/m2K]

Outside walls (YTONG, min wool) 0,10 0,56

Double skin glass (g=0,59) 0.68 1,30

Terrace (green roof or concrete+rockwool) 0,10 0,20

Underground floor (heated underground) 0,18 0,21

Exterior walls under ground 0,10 0,35

Calculation hypothesis:

Useful area: 1400sqm

Inside volume: 4600 m3

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Arch. Mădălina IORDĂCHESCU Eng. Ionela ION 16 16

Time Set point

Heating

Monday-Friday => 7-19 20

Monday-Friday => 19-7 15

Friday-Monday => 19-7 15

Cooling Monday-Friday => 7-19 26

Monday-Friday => 19-7 Off

Friday-Monday => 19-7 Off

Mechanical Ventilation 24h On

HVAC equipment functioning schedule

3. Energy consumption-estimation (cont.)

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Arch. Mădălina IORDĂCHESCU Eng. Ionela ION 17 17

Min Max Avg

Text (0C) -15,4 35,4 20,6

Qheat (kW) 87

Qcool (kW) 159

Heating period (hour) 1869

Cooling period (hour) 1730

TRNSYS

3. Energy consumption-estimation (cont.)

Qheating=46kWh/sqm/y Qcooling=85kWh/sqm/y

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4. Proposals for mechanical equipment (3)

CHP (1)

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CHP(2)-Stirling Advantages

-can be used with many fuel sources,

including low-temperature souces

-the source is external to the engine, so

Stirling engines can be coupled to a

biomass combustion unit

-Stirling operatesvery quietly because there

is no exhaust of the gas

-very efficient

-reversible

Disadvantages

-higher capital costs

-not so widely used till now (only few

applications)

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CHP(2)-Stirling Exemple of a 55 kW (electrical) generator set for combined heat and power applica-tions. The total enclosure length is about 2.5 metres, and this assembly has a mass of about 1300 kg.

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• ~ 3,5kW

• HEX refrigerant-water-soil

• cooling or heating

• Borehole of approx. 7 m deep and 70cm in diameter


GEOCOLUMN

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SOLAR TUBES

• Super Silver SunPipe • 75…6300 lux depending on diameter and natural light outside (7,5…70sqm) • reflectance 0,95 • combined with LED

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Other complementary solutions for RO-NZEB :

• thermodinamic solar collectors

• Canadian tube (earth-to-air heat exchangers-EAHX) for ventilation combined with ventilation through double-skin facades

• absorbtion chiller

• used water cleaning devices

• rain water storage

• PV pannels

• microturbines with vertical axle

• BMS

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5. Financial estimations

1,1

0,4

1,3

0,4

1,8

0

0,2

0,4

0,6

0,8

1

1,2

1,4

1,6

1,8

RO-NZEB COST ESTIMATION

Enveloppe 1,1

Structure 0,4

Mechanical equips 1,3

Field refurbishment 0,4

Laboratories 1,8

Cost (Mil Euro)

AVERAGE CONSTRUCTION COST 2078 Euro (VAT excluded)

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6. Conclusions

• AIIR initiative gathering 2 Universities and 6 private companies

• proposal for a public NZEB building (model)

• RO-NZEB will be also green (BREEAM) and bioclimatic building

• for research (itself for monitoring), with laboratories and offices

• heating 40-50kWh/sqm/y, cooling 80-90kWh/sqm/y, lighting 5kWh/sqm/y

• 2078 Euro/sqm construction cost (included field rehabilitation, excluded research equipment, excluded design cost)

• RO-NZEB promoting the companies in the consortium (50-50)

• RO-NZEB for high-tech technology visiting tour in Bucharest

• RO-NZEB searching now for EU financing funds

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Assoc.prof.dr.eng. Cătălin Lungu www.aiiro.ro

www.instalatii.utcb.ro Tel/fax +4021.252.42.95 [email protected] [email protected]

Contact info:

Thank you for your questions !

http://www.aiiro.ro/

http://www.instalatii.utcb.ro/

mailto:[email protected]



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Associate Professor Cătălin LUNGU PhD, FII-UTCB & AIIR · Prof.ass.dr.eng. Cătălin LUNGU...

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