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How to program energy efficiency improvement of public real estate – a case of a small municipality

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The initiative has been conducted within Alterenergy, a Strategic Project funded within the cross-border Cooperation Programme IPA-Adriatic 2007-2013.

It regards Agnone, a municipality in Molise Region ( population: 5,028 inhabitants, altitude: 830 m a.s.l ). Eight municipal buildings in town have been selected (town hall, schools and historical buildings) together with a reference meteorological station.

The aim was to test a methodology to obtain, in short time and at low cost, a preliminary package of interventions for the energy efficiency improvement of buildings; the municipal real estate has been considered as whole and on the base of empirical data evidence.

Once the building stock and a preliminary package of interventions have been identified, professionals and ESCOs can be involved for detailed design and implementation according to standard procedures at national and regional level.

The initiative has been split into three phases.

Phase 1: Building Modelling and Configuration Buildings Site Survey.

Collection of building drawings, dimensions, equipment characteristics, space utilization. Installation and start-up of Planergy™ Information System. Set up of a data base on buildings qualitative and quantitative characteristics focused on operational usage and on energy behavior.

Phase 2: Energy operational assessment

Data metering collection from invoices (period 2011-2013). Energy consumption metering (i.e. weekly measurements from energy meters in buildings and from meteo station). Data recording, analysis and processing. Usage and energy performance indicators have been computed based on building characteristics (e.g. volumes, dimensions, envelope surfaces, usage, energy flows behaviour) and on measured energy consumption.

Phase 3: Definition of a portfolio of energy efficiency Improvement measures on real estate

Adoption of a catalogue of feasible solutions to be considered for the building stock under investigation. Interventions not compatible with existing zoning ordinances have been discarded. Assessment of expected impacts of each measure on each building and estimation of their related costs. Selection of those measures which are convenient in terms of cost benefit ratio.

The selected investment package regards 32 energy efficiency measures on eight buildings. Expected results from the initiative:

  • Expected reduction on annual energy expense: -18,7%;
  • Investment Pay Back Time: 11 years.

 

 

Lessons learnt

Before investing on energy efficiency of the municipal buildings, a preliminary assessment on effective usage and on energy behaviour of the overall real estate stock is highly desirable and can be achieved at low-cost and with internal resources. To preliminary assess the actual building behaviour, municipal personnel can regularly and easily collect metering data with the aid of suitable ICT support. Based on collected evidence, it was then possible to identify an integrated and cost-effective package of interventions on several public buildings. The initiative is preparatory to involvement of technicians and/or ESCO not on particular buildings but on the real estate stock as a whole. The introduced independent monitoring procedure will be useful also in the future to control the effectiveness of interventions which will be implemented.

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Start date - End date

środa, 1 Styczeń, 2014 do poniedziałek, 30 Czerwiec, 2014

Comment

The test case has been conducted with the support of Planergy™, a methodology and a software application to monitor actual usage and energy behavior of buildings and to register environmental conditions. Main features: Web Application (Cloud solution); Smartphone Apps to remotely collect data; monitoring of buildings and of their in-use performance; processing of Linked Open Data Set according to a specifically designed domain ontology. Planergy™ evaluation algorithms follows the “Operational Rating” approach. For more information visit the web site: www.planergy.it

References

“An Innovative Social Model to Monitor Usage and Energy Performance of Public Real Estate based on ICT Applications” C. Laurenti, B. Lo Re, V. Mangano - Euro Mediterranean Dialogue on Public Management Conference, MED 7 on “Societal government and innovative public management: Challenges for the Euro-MENA area” Rome – Italy Tor Vergata University October 9th 2014
Report "Analisi e confronto tra le procedure di affidamento più innovative, anche a livello internazionale, di servizi finalizzati al miglioramento dell'efficienza energetica per alcune tipologie di edifici" Rome 2011. Available at: http://www.buildup.eu/publications/24077