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Energy Upgrade of the Administration Building of C.R.E.S

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The Energy Upgrade of the Administration Building of C.R.E.S addresses the issue of energy upgrading the existing building stock. Specifically the project focuses on retrofitting techniques for the external envelope of buildings.

I. GENERAL CHARACTERISTICS OF THE PRACTICE

1. TITLE OF THE PRACTICE

Energy Upgrade of the Administration Building of C.R.E.S

2. LOCATION OF GOOD PRACTICE

Pikermi, Greece.

3. PRECISE THEME/ISSUE TACKLED BY THE PRACTICE

The Energy Upgrade of the Administration Building of C.R.E.S addresses the issue of energy upgrading the existing building stock. Specifically the project focuses on retrofitting techniques for the external envelope of buildings.

4. KEY WORDS

Retrofitting, building envelope, awareness, sponsorship.

5. OBJECTIVES OF THE PRACTICE

The project aims to demonstrate and promote, among engineers, building owners and contractors, options of energy saving techniques for the external envelope of existing buildings.

6. DETAILED DESCRIPTION OF THE PRACTICE

6.1 Origin/background

In the framework of the implementation of the Energy Performance of Buildings Directive in Greece, the Center for Renewable Energy Sources and Saving (CRES) completed a study for the energy upgrade of its existing administration building. Established manufacturers of building materials were informed of the study and offered to fully sponsor the realization of the project. The Division of Development Projects has undertaken the management of the project.

6.2 Timescale

Completion of energy study                                 April – June 2008

Construction phase                                              June – October 2009

Educational and promotional activities  October – December 2009

6.3 Bodies involved

The Center for Renewable Energy Sources and Saving (CRES) is the Greek national entity for the promotion of renewable energy sources, rational use of energy and energy conservation, monitored by the Ministry of Development. CRES is the owner of the project and has also undertaken its general management and scientific support.

The practice is fully sponsored by the following companies:

Polykem: distributor and supplier of insulation products and other building materials.

Alumil: aluminium extrusion group and manufacturer of aluminium systems for architectural use.

Dow: manufacturer of insulation products and a wide range of building materials.

Isomat: manufacturer of building chemicals and insulation products.

6.4. Problem tackled

The Administration building of CRES was constructed in the early ‘80s. Similarly to many buildings of the same period its external envelope was characterised by low thermal properties and several defects. Specifically, insulation on external walls was insufficient, no thermal insulation was used on any part of the roof and windows allowed extreme air leakage. In addition there was no provision for solar control in the majority of openings. All the above resulted in high energy consumption for conditioning the building throughout the year.

Another problem addressed by the practice is the low rate of energy upgrades in existing buildings across the country. Building owners, engineers and contractors are not aware of the available energy saving systems and materials or are reluctant to use them as they are unfamiliar with the processes involved or the expected benefits. 

6.5 Target of the practice

The practice aims to educate and sensitise the public on the issue of energy saving in buildings through demonstrating available and mature solutions and technologies. The completion of the project also coincides with the launch of a subsidy programme by the Ministry of Development for energy upgrades on existing buildings. In this way the practice will function as a pilot project. In addition the promotion of benefits linked with energy saving building solutions will lead to a greater demand of such products and services thus stimulating, in the long-term, the sustainable building sector.

6.6 Target groups

The groups targeted through the practice are building owners as well as engineers and contractors working in the building sector.

6.7. Detailed content of the practice (incl. process and methods used)

With EPDB coming into force in Greece CRES decided to proceed with a pilot project setting the example of a good practice for the energy upgrade of an existing building. The Administration building was selected as the oldest building owned by CRES and also the one with the highest energy needs. It is also a building open to the public that is often visited by representatives of the state, engineers and school students attending events organised by CRES.

The project started with an energy audit monitoring the building’s current behaviour, followed by an energy study that examined the optimum upgrades on the envelope of the building. State of the art thermal simulation software was used for the study. The final proposal included:

– the application of 5cm of extruded polystyrene (XPS) on all external walls (external thermal insulation composite system – ETICS)

– the addition of 10 cm of XPS on all roofs,

– the replacement of all windows and doors with new units featuring aluminium frames with thermal break and double, low-e glazing offering both insulation and solar control

– the construction of a small green roof

After the study was finalised a group of building material manufacturers offered to implement the project following the specifications given in the study. The sponsors provided all the materials needed and covered all labour costs. During several meetings the engineers of both CRES and the participating companies collaborated and exchanged know – how in order to determine the optimum solutions and detailing for a range of practical problems. All the techniques used should be based on mature technologies, readily available in the market so that the practice could be easily reproduced in a wide scale.

After construction is finalised a number of dissemination activities are planed in order to inform the public including:

– seminars and presentations

– printed material

– publication of technical articles

– presentation through CRES’ website

6.8. Financial framework

The cost of the construction is sponsored by the companies Polykem, Isomat, Dow and Alumil.

7. EVALUATION

7.1. Results and outputs of the practice

Average energy saving for cooling and heating of the building 40%

7.2. Main strengths

Among the strengths of the project is that it served as an opportunity for both research and application engineers to interact and share resources adding to the know-how and experience of all parties involved. In addition the practice will reach a wide part of the public due to CRES’ experience on dissemination and educational activities and to the fact that it involves a building open to the public.

7.3 Lessons learned from the practice

Through the project the importance of full scale pilot projects was once again proven. Many building owners and engineers had heard of energy saving measures in buildings but never had the chance to see an application up close and be informed about it and other available options.

7.4 Recommendations for improvement:

The upgrade of the building can be completed in a second phase by implementing energy saving measures through the retrofitting of building systems such as the lighting and HVAC systems.

OTHER RELEVANT INFORMATION

http://www.cres.gr

II. TRANSFERABILITY OF THE PRACTICE

8. KEY FACTORS ASSOCIATED WITH THE REGIONAL CONTEXT

The Energy Upgrade of the Administration Building of C.R.E.S was successful as it refers to a market were mature technological solutions are available, however, the groups involved still lack in awareness and experience.

9. OTHER KEY FACTORS FOR THE SUCCESS OF THE GOOD PRACTICE

The necessary applications should be readily available in the market of the region in question, along with engineers and contractors familiar with the principles of sustainability and the techniques involved.

10. GENERAL JUDGEMENT OF THE PRACTICE

10.1. Degree of Innovation   +

10.2. Transferability              ++

10.3. Cost/benefit ratio        ++

11. CONTACT

Regional Content Manager

a) Chrysostomos Stylios

Tel: +30 2610911553

E-mail: stylios@psp.org.gr

b) George Tsovolos

Tel: +30 2610911560

E-mail: tzovolos@gmail.com

Additional Contact Persons

a) Ms Vicky Sagia

Tel: +302106607427

E-mail: vsagia@cres.gr

b) Mr Kostas Laskos

Tel:+302106607413

E-mail:  klaskos@cres.gr

c) Dr Dimitris Papastefanakis

Tel:+302106603245

E-mail: dpapas@cres.gr

May, 31 2010 Comments Closed | Good Practices, Western Greece

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