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CIB TG66 South America Webinar 2010-11-04 1 Nastia Almao
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CIB TG66 South America Webinar 2010-11-04 1 Nastia Almao

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The South American session of the international webinar series,"THE IMPLEMENTATION OF ENERGY EFFICIENT BUILDINGS POLICIES IN 5 CONTINENTS" was held on November 4, 2010, 10 pm - 12:30 pm, Brasilia …

The South American session of the international webinar series,"THE IMPLEMENTATION OF ENERGY EFFICIENT BUILDINGS POLICIES IN 5 CONTINENTS" was held on November 4, 2010, 10 pm - 12:30 pm, Brasilia time.

The agenda for the free 2.5-hour webinar was:

· 10:00 Introduction - Jean Carassus, TG 66 Coordinator

· 10:10 "The Ordinance on Buildings Thermal Quality for the City of Maracaibo-Venezuela" - Nastia Almao, Emeritus Professor, University of Zulia

· 10:30 "Energy efficiency in buildings in Colombia" - Carlos Valles, UPME (Energy Planing Unit), Ministry of Mines and Energy

· 10:50 "Energy efficiency in buildings in Argentina" - Gautam Dutt

· 11:10 "Barriers to Energy Efficiency in Buildings in Emerging Economies. Strategies to start actions: The case of Uruguay." - Alfonso Blanco, Mechanical and Industrial Engineer of UdelaR University

· 11:30 "Chilean Building Thermal Performance regulations: what we´ve done and what we haven´t." - Waldo Bustamante, Professor at the School of Architecture. P. Catholic University of Chile (PUC)

· 11:50 "The Brazilian Energy Efficiency Label for Buildings" - Roberto Lamberts, UFSC, Professor, Federal University of Santa Catarina, South Brazil

· 12:10 Conclusions - Jean Carassus, TG 66 Coordinator

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  • 1. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” “The Ordinance about the Thermal Quality ofbuildings for the City of Maracaibo-Venezuela ” Nastia Almao A., Professor, Ch. Eng., Mech. Eng. MSc Consultant Maracaibo, Venezuela. 2010
  • 2. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” Maracaibo urban external conditions: • Maximum outdoor temperature: 35 C • Minimum outdoor temperature: 25.3 C • Minimum urban outdoor temperature: 24 to 30 C • Annual average temperature: 29.6 C • Daytime relative humidity: 50 to 65% • Night relative humidity: 75 to 92% • Average maximum wind velocity : 2.3 m/s • Annual average wind velocity: 1.5 m/s Geographic Location: • Pollution levels: moderate Zulia is located in the • Height above sea level: 30 m north west of Venezuela. • North Latitude: 10.65° Maracaibo is the capital of Zulia State. It currently has three million These daily hygrothermal values (temperature inhabitants, and humidity) characterizes its climate as hot approximately. and humid, being all year out of the thermal comfort zone. Maracaibo, Venezuela. 2010
  • 3. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” What was the energetic situation of Maracaibo when ENELVEN (Maracaibo’s electricity supply Company) decided to structure a Commission to study solution alternatives?1. Energy Consumption Trend (1998) kWh/d/year Comparison of annual electric consumption for dwelling (kWh/d/year) for the state of Zulia, Venezuela and other South American countries. Maracaibo, Venezuela. 2010
  • 4. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”Energy Consumption Trend (1998) IRONING OTHERS LAUNDRY 2% 7% 2% LIGHTING 6% REFRIGERATOR INDUSTRIAL 11% 21% RESIDENTIAL 49% OTHERS 3% AIR CONDITIONING 76% COMMERCIAL 23%Maracaibo distribution of electricity consumptions among sectors where 49% isresidentialDistribution of residential sector electricity consumptions, where 76%is from air conditioning usage, 11% refrigerators, and 6% lighting.2. Wrong Habits of Electrical energy use.3. Low cost and subsidy of energy (0.032 USD/kWh). Maracaibo, Venezuela. 2010
  • 5. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”4. In the last decades, the urban development of the City of Maracaibo, was characterized by a violent unplanned expansion, resulting in profound changes in the environmental and aesthetic quality of the urban area.5. The architecture of the city was not consistent with local climatic conditions, with the subsequent installation of mechanical air conditioning units of high cooling capacity.6. Absence of laws regulating the thermal quality of buildings. Maracaibo, Venezuela. 2010
  • 6. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” Commission for the Improvement of the Thermal Quality of Buildings and Urban Space 1996 The project was led by the local electricity supply company’s center for energy optimization (ENELVEN-COE), who invited the following organizations: The University of Zulia Municipality of Maracaibo Chamber of Construction Real State Chamber of Commerce Social and Economic Development Institute Engineers and Architects Association Energy and Mines Ministry Environmental Ministry. Maracaibo, Venezuela. 2010
  • 7. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” HANDBOOK FOR HANDBOOK FORTHERMAL QUALITY IMPROVEMENT OF URBAN SPACE THERMAL QUALITY IMPROVEMENT OF BUILDINGS (1997) (1999)Ordinance about Buildings Thermal Quality for the city of Maracaibo Project (2001)National Fund for Science, Technology and Electricity Supply Company of Zulia State Innovation of Venezuela (currently CORPOELEC national electricity (under the Ministry of Science and corporation). Technology). Maracaibo, Venezuela. 2010
  • 8. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”Ordinance on Buildings Thermal Quality for the city of Maracaibo Approved by Municipality Chamber on February 2th, 2005 Published in the Municipality Gazette on July 20th, 2005 Taking effect on January 20th, 2006. Being the first regulation of this nature in Venezuela, a communication and outreach program was set up in order to: Inform, educate and capacitate the architecture and construction community, through frequent talks at local universities and audio-visual media, forums, conferences, workshops . Train those officials of the municipality, responsible for verifying compliance with the Ordinance. Maracaibo, Venezuela. 2010
  • 9. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” Ordinance Development MethodologyOBJECTIVE To ensure that the conditions of design and construction of the building envelope (roof and walls) in the Municipality of Maracaibo complies with the limits of the Global Thermal Transfer Value (VTTG), in order to guarantee thermal comfort conditions and to diminish electricity consumption due to air conditioning use. Quantitative Evaluation of handbook recommended alternatives. Research about related regulations at international level on which to frame and build up the new regulation. Calculation Method Selection. Development of required databases. Calculation of variables. Establishment of limit values to comply with the ordinance. Establishment of requirements for a friendly software achievement. Writing the ordinance text as a mandatory legal instrument. Maracaibo, Venezuela. 2010
  • 10. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” The Ordinance presents a methodology to evaluate the energy efficient design of a building’s envelope taking into account: Local climate Physical and thermal properties of local construction assemblies for walls and roofs Envelope external finishing Type, number of panes and dimension of window glass, Fenestration external solar protection and, Internal design temperature. Maracaibo, Venezuela. 2010
  • 11. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” These variables are considered in the VTTG (Global Heat Transfer Value) calculation. The Global Thermal Transfer Value (VTTG) represents the maximum heat gain through each of the outer surfaces of a building, setting an internal temperature of twenty five degrees centigrade (25 C). It is evaluated under extreme weather conditions of Maracaibo and it is determined separately for walls and roofs, per unit of total area. Requirement VTTG for Compliance 25 W/m2 Roof requirement 25 W/m2 (opaque and transparent portions) Walls requirement 60 W/m2 60 W/m2 (opaque and transparent portions) Maracaibo, Venezuela. 2010
  • 12. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” It was established as mandatory for new commercial and residential buildings. All variables involved to VTTG calculation should be considered during the design process of a building. Architects and Constructors can get the ordinance with the software (named PROCATED) to preliminary assess the building envelope thermal quality. The building project should be reviewed and evaluated by the local authority (Oficina Municipal de Planificación Urbana, OMPU*) before a construction permit is granted. (*) Municipal Urban Planning Bureau Maracaibo, Venezuela. 2010
  • 13. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”Incentive Scheme Urban Incentives Tax Incentives Special qualifications awarded in Total or partial exemptions of buildings recognition for the contruction taxes are given as a benefit contribution to energy savings. for achiving a special qualification: Thermal Quality Thermal Quality Thermal Quality Gold Seal Silver Seal Bronze Seal Maracaibo, Venezuela. 2010
  • 14. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ” “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”Ordinance Implementation Results (2006 – 2010)Statistic of the Project Evaluated Special Qualifications 2006-2009 Bronze Year Requested 18% Approved Permission 25% Silver 2006 69 15% 2007 70 2008 124 2009 18 Total Construction 281 Permits Gold 42% 76% residential and 24% non residential Datos: Arq. E. Amador 2010. Según datos del CPU Alcaldía de Maracaibo Maracaibo, Venezuela. 2010
  • 15. “The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”“The Ordinance about Buildings Thermal Quality for the City of Maracaibo-Venezuela ”Concluding Remarks:• The Ordinance has brought benefits to: building end user; promoters;state and municipality; electricity company and the environment.• It has been important having established an incentive regime.• It has served to acquaint architects, engineers and contractors todesign buildings with energy conservation criteria.Projects in process:To extend this ordinance application to other municipalities ofVenezuela.Stepping forward, including regulations for the others energysystems of the building.Certification of Energy Efficiency in Buildings. Maracaibo, Venezuela. 2010

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