Sustainable Design of a University Building in Xanthi, Greece

Democritus University of Thrace

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Christos Mytafides . Sustainable Design

SUSTAINABLE DESIGN OF A UNIVERSITY BUILDING IN XANTHI, GREECE In this study of a university building in Xanthi, Greece, energy analysis has been conducted to assess the energy evaluation of the building’s existing condition and to estimate the energy upgrade of the building, calculating the contribution of passive heating and cooling techniques. In addition, a solar analysis has been conducted so it could be imprinted the energy channeled to the building surfaces through solar radiation during the year, according to the climatic conditions of the region, in order to study the performance and effectiveness of passive heating and cooling techniques

at the particular building. In order to achieve better energy performance of the building, a daylight diffusion analysis at the interiors was conducted with the building's existing transparent surfaces, resulting the replacement to have both the desired thermal performance and optimal optical daylight diffusion resulting to less power consumption during the diurnal operation of the building's lighting systems. Furthermore, a study with CFD software, to analyze and imprinting of the contribution of Trombe walls has been conducted.

Christos Mytafides - Sustainable Design

South view

West view

North view

East view Christos Mytafides - Sustainable Design

Christos Mytafides - Sustainable Design

Sketch 3D view

Building Spaces Analysis

Building Elements Analysis

Lighting Analysis

Christos Mytafides - Sustainable Design

Glazing replacement

Christos Mytafides - Sustainable Design

Lighting Analysis

Christos Mytafides - Sustainable Design

Annual Solar Path of the Building

Christos Mytafides - Sustainable Design

Solar Analysis 10 September - 10 October

10 December - 10 January

10 June - 10 July

Christos Mytafides - Sustainable Design

Democritus University of Thrace

Christos Mytafides . Sustainable Design

Democritus University of Thrace

ZERO ENERGY BUILDING

Christos Mytafides . Sustainable Design

Photovoltaic modules

Christos Mytafides - Sustainable Design

Monthly energy generation from photovoltaic modules in kWh Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Total

Solar Radiation (kWh)

74

90

110

130

153

181

160

142

126

99

78

61

1404

6,853

8,335

10,187

12,040

14,170

16,763

14,818

13,151

11,669

9,169

7,224

5,649

130,027

PV Energy Production (kWh)

INTERIOR

Christos Mytafides - Sustainable Design

Christos Mytafides - Sustainable Design

Christos Mytafides - Sustainable Design

Christos Mytafides - Sustainable Design

Christos Mytafides - Sustainable Design

Christos Mytafides - Sustainable Design

Christos Mytafides - Sustainable Design

CFD simulation in the classroom during winter

Surface temperature distribution and air temperature in the classroom

Maximum air temperature distribution in the classroom

Range of air velocity within the classroom

Three dimensional representation of the airflow within the classroom

Christos Mytafides - Sustainable Design

CFD simulation during winter introducing fresh air

Surface temperature distribution and air temperature in the classroom

Maximum air temperature distribution in the classroom

Range of air velocity within the classroom

Three dimensional representation of the airflow within the classroom

Christos Mytafides - Sustainable Design

CFD simulation in the classroom during summer

Surface temperature distribution and air temperature in the classroom

Minimum air temperature distribution in the classroom

Range of air velocity within the classroom

Three dimensional representation of the airflow within the classroom

Christos Mytafides - Sustainable Design

Annual energy consumption, specific energy consumption and annual carbon dioxide emissions of building’s existing condition Energy Lighting Equipment HVAC Electricity Fossil fuels Total

Percentage

kWh

Cost

20% 9% 6% 35% 65% 100%

86,749 41,579 24,636 152,964 288,278 441,242

€13,012 €6,237 €4,271 €22,945 €32,589 €56,109

Energy

9% 6%

58 109 167

151 76 227

Energy use over 30 years

20%

65%

Specific energy consumption Metric tons CO2/ year per year (kWh/m2/yr)

Lighting Equipment HVAC Fossil Fuels

kWh

€

Electricity 4,588,920 €688,350 Fossil fuels 8,648,340 €977,670 Total 13,237,260 €1,683,270

Christos Mytafides - Sustainable Design

Annual energy consumption, specific energy consumption and annual carbon dioxide emissions after building’s energy upgrade Energy

Percentage

Cost

kWh

26% 38% 36% 100% 0% 120% 0%

27,998 41,579 38,750 108,327 0 -130,027 -21,700

€4,200 €6,237 €5,812 €16,249 €0 -€2,170*

Lighting Equipment HVAC Electricity Fossil fuels Photovoltaics Total

Specific energy consumption Metric tons CO2/ year per year (kWh/m2/yr) 41 0 49 -8

107 0 -129 -21

* pricing of electricity produced by photovoltaics equals to 100 €/MWh (Greek Ministry of Environment, 2015)

Energy use over 30 years

36%

Energy

26%

38%

Lighting Equipment HVAC Fossil Fuels

kWh

€

Electricity

3,249,810

€487,470

Fossil fuels

0

€0

-3,900,810

-

-651,000

-€65,100

Photovoltaics Total

Christos Mytafides - Sustainable Design

WEATHER STATION OF THE REFERENCE BUILDING Red color: Reference Building Orange Color: Weather Station* *The weather station was selected according to altitude and the relevance of climate data for the desired study area.

Christos Mytafides - Sustainable Design

Monthly Design Data

Diurnal Weather Averages

Annual Temperature Bins

Humidity Christos Mytafides - Sustainable Design

Annual Frequency Wind Rose Annual Speed Wind Rose Monthly Wind Rose Frequency Christos Mytafides - Sustainable Design

Democritus University of Thrace

Christos Mytafides . Sustainable Design

Christos Mytafides - Sustainable Design

Democritus University of Thrace

Christos Mytafides . Sustainable Christos Mytafides - SustainableDesign Design