Design of a zero energy office building
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- Julian Thomas
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1 Design of a zero energy office building at Haakonsvern, Bergen Client and Project leader: Forsvarsbygg PRL: Stema Rådgivning ARK: LINK Arkitektur RIV, RIE og RIB: Multiconsult Special consultant energy: ZEB-centre Authors: Inger Andresen, Frode T. Haanshuus, Jan Hoel, Ivar Jonassen, Nils Ivar Nilsen, Mads Mysen, Svein Nytræ, Berit Time
2 Goals 000 m usable floor area 97 occupants Mainly office work with some special functions Normal architecture Cost efficient Robust and user friendly Energy class A, Passive House and Zero Energy Pilot project ZEB (
3 Process Integrated energy design Schematic design Preliminary design Des 0 May 0 Okt 0 ZEB workshop no : Concept Goal: The building should be assessed as zero energy on a yearly basis, including energy use for space heating, hot water, cooling, lighting, fans and pumps. alternative concepts
4 Process Integrated energy design Schematic design Preliminary design Des 0 May 0 Okt 0 ZEB workshop no : Concept ZEB workshop no : Techical systems ZEB workshop no 3: Heating / ventilation
5 Strategy 8 steps towards zero energy
6 Step Location, orientation and form
7 Step Location, orientation and form Calculated yearly energy demand, kwh/m BRA
8 Step Insulation and air tightness Avoid thermal bridges Interior structural system Two layers of insulation Moisture barrier protected Continuous wind barrier
9 Step Insulation and air tightness Calculated yearly energy demand, kwh/m BRA
10 Step 3 Daylight and sun Average daylight factor > 5% in offices Calculated with DIAL+Lighting
11 Step 3 Daylight and sun Daylight autonomy: Number of hours when daylight alone provides sufficient lighting In % of working hours Statistical weather data: only overcast days Requirement for offices: 500 lux Calculated with DIAL+Lighting based on statistical weather data for Bergen
12 Step 3 Daylight and sun Daylight autonomy: Number of hours when daylight alone provides sufficient lighting In % of working hours Only overcast days Requirement for offices: 50 lux Calculated with DIAL+Lighting based on statistical weather data for Bergen
13 Step 3 Daylight and sun
14 Step 3 Daylight and sun Calculated yearly energy demand, kwh/m BRA
15 Step Efficient lights and equipment Calculated yearly energy demand, kwh/m BRA
16 Step 5 Thermal mass Temp. [ C] Light weight Temperaturer Utetemperatur Lufttemperatur i sone 3 Operativtemperatur i sone Tilluftstemperatur Ventilasjon (ventilasjon) 3 Tid [h] Heavy weight Temp. [ C] Temperaturer Tid [h] Utetemperatur Lufttemperatur i sone 3 Operativtemperatur i sone Tilluftstemperatur Ventilasjon (ventilasjon)
17 Step 5 Thermal mass Calculated yearly energy demand, kwh/m BRA Preliminary - alone
18 Step 6 Passive climatization Summer: Night cooling via windows or ventilation system W 3 ' q Cd (8gH ) 0,5 [Allard 998] 3 hvor: q: luftmengde i (m 3 /s) C d : trykkstapskoeffisient W: Vindusbredde (m) H: Vindushøyde (m) ' i i 0,33 3 [ ( ) ] o ( o i )
19 Step 6 Passive clmatization Temp. [ C] 7 Temperaturer Tid [h] Utetemperatur Lufttemperatur i sone 3 Operativtemperatur i sone Tilluftstemperatur Ventilasjon (ventilasjon)
20 Step 6 Passive climatization Phase Change Materials (PCM) Have the potential to give similar effects as thermal mass Laboratory test showed a peak temperature shaving of ca C
21 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 6:00 :00 8:00 0:00 tempertauture [ C] Step 6 Passive climatization Operative temperature - hourly profile - lightweight structure 7 NO PCM PCM_ in partitions PCM_6 in Partitions Time Calculated with Energy Plus for a warm week in August
22 Step 6 Passive climatization Active air supply units Provides very efficient demand control of temperature and air volumes Very low SFP low energy use for fans Possibility to eliminate radators
23 Step 6 Passive climatization Calculated yearly energy demand, kwh/m BRA
24 Step 7 Local renewable heating and cooling Calculated yearly energy demand, kwh/m BRA Sea water based heat pump system COP-heating = 3.0 COP-cooling = 0.0
25 Step 8 Local renewable electricity Beregnet årlig levert energi, kwh/m BRA Photovolatic system: 30 m photovoltaic modules 7% system efficiency Produces ca kwh/yr (statistically)
26 Summary Nearly zero energy in 8 steps 6 kwh it is as simple as that! 65 kwh
27 Thank you!
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Building Integrated Combined Solar Thermal and Electric Generation Demonstration Project at Concordia University Summary An innovative solar energy installation has been installed at Concordia University
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