THERMAL SCIENCE
International Scientific Journal
COST-OPTIMAL ENERGY RETROFIT FOR SERBIAN RESIDENTIAL BUILDINGS CONNECTED TO DISTRICT HEATING SYSTEMS
ABSTRACT
Buildings are significant energy consumers and provide a notable potential to reduce primary energy consumption and increase energy efficiency. Cost-effectiveness of energy efficiency projects is of crucial importance for their implementation. Cost-optimality of different packages of energy retrofit measures is studied across the European Union, but Serbia mostly lacks such information. This paper analyzes cost-optimal solutions for Serbian residential buildings connected to district heating systems, considering three different scenarios related to the economic input parameters. Additionally, it considers the potential for primary energy savings beyond cost-optimality and associated costs. The optimal solutions, that correspond to minimal global cost or minimal primary energy consumption, are determined as the results of the combinatorial optimization problems. These problems are solved using the genetic algorithm and local search. The results are compared against the ones obtained with the sensitivity analysis. The global cost can be reduced by 8-43% in the cases of cost-optimal solutions, simultaneously saving 30-76% of primary energy. The potential to save primary energy is higher - it exceeds 70% in all the analyzed cases, but also requires higher global cost, sometimes larger than in the absence of the retrofit. The paper also emphasizes high dependencies of the results on very uncertain economic inputs.
KEYWORDS
PAPER SUBMITTED: 2018-03-08
PAPER REVISED: 2018-07-18
PAPER ACCEPTED: 2018-08-21
PUBLISHED ONLINE: 2018-09-29
THERMAL SCIENCE YEAR
2019, VOLUME
23, ISSUE
Supplement 5, PAGES [S1707 - S1717]
- ****, Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast), Official Journal of the European Union, L 153 (2010), pp. 13-35
- ****, Cost Optimality. Discussing methodology and challenges within the recast Energy Performance of Buildings Directive, Buildings Performance Institute Europe, 2010
- ****, Implementing the Cost-Optimal Methodology in EU Countries. Lessons Learned from Three Case Studies, Buildings Performance Institute Europe, 2013
- ****, Directive 2012/27/EU of the European Parliament and of the Council of 25 October 2012 on energy efficiency, amending Directives 2009/125/EC and 2010/30/EU and repealing Directives 2004/8/EC and 2006/32/EC (Text with EEA relevance), Official Journal of the European Union, L 315 (2012), pp. 1-56
- ****, Energy Sector Development Strategy of the Republic of Serbia for the period by 2025 with projections by 2030, Ministry of Mining and Energy of the Republic of Serbia, 2016
- Turanjanin, V.M. et al., Different Heating Systems for Single Family House. Energy and Economic Analysis, Thermal Science, 20 (2016), Suppl. 1, pp. S309-S320, doi: 10.2298/tsci150616225t
- Almeida, M., Ferreira, M., Cost effective energy and carbon emissions optimization in building renovation (Annex 56), Energy and Buildings, 152 (2017), pp. 718-738, doi: 10.1016/j.enbuild.2017.07.050
- Congedo, P.M. et al., Cost-optimal design for nearly zero energy office buildings located in warm climates, Energy, 91 (2015), pp. 967-982, doi: 10.1016/j.energy.2015.08.078
- Niemelä, T. et al., Energy performance and environmental impact analysis of cost-optimal renovation solutions of large panel apartment buildings in Finland, Sustainable Cities and Society, 32 (2017), pp. 9-30, doi: 10.1016/j.scs.2017.02.017
- Ascione, F. et al., CASA, cost-optimal analysis by multi-objective optimisation and artificial neural networks: A new framework for the robust assessment of cost-optimal energy retrofit, feasible for any building, Energy and Buildings, 146 (2017), pp. 200-219, doi: 10.1016/j.enbuild.2017.04.069
- Ortiz, J. et al., Cost-effective analysis for selecting energy efficiency measures for refurbishment of residential buildings in Catalonia, Energy and Buildings, 128 (2016), pp. 442-457, doi: 10.1016/j.enbuild.2016.06.059
- Bonakdar, F. et al., The Implications of Climate Zones on the Cost-Optimal Level and Cost-Effectiveness of Building Envelope Energy Renovation and Space Heat Demand Reduction, Buildings, 7 (2017), 39, doi: 10.3390/buildings7020039
- Samuelson, H., et al., Parametric energy simulation in early design: High-rise residential buildings in urban contexts, Building and Environment, 101 (2016) pp. 19-31, doi: 10.1016/j.buildenv.2016.02.018
- Ascione, F. et al., A new methodology for cost-optimal analysis by means of the multi-objective optimization of building energy performance, Energy and Buildings, 88 (2015), pp. 78-90, doi: 10.1016/j.enbuild.2014.11.058
- Ramallo-González, A.P., Coley, D.A., Using self-adaptive optimisation methods to perform sequential optimisation for low-energy building design, Energy and Buildings, 81 (2014), pp. 18-29, doi: 10.1016/j.enbuild.2014.05.037
- Ascione, F. et al., Multi-stage and multi-objective optimization for energy retrofitting a developed hospital reference building: A new approach to assess cost-optimality, Applied Energy, 174 (2016), pp. 37-68, doi: 10.1016/j.apenergy.2016.04.078
- Ascione, F. et al., Resilience of robust cost-optimal energy retrofit of buildings to global warming: A multi-stage, multi-objective approach, Energy and Buildings, 153 (2017), pp. 150-167, doi: 10.1016/j.enbuild.2017.08.004
- Stojiljković, M.M. et al., Greenhouse gases emission assessment in residential sector through buildings simulations and operation optimization, Energy, 92/3 (2015), pp. 420-434, doi: 10.1016/j.energy.2015.05.021
- Dedinec, A. et al., Optimization of Heat Saving in Buildings Using Unsteady Heat Transfer Model, Thermal Science, 19 (2015), 3, pp. 881-892, doi: 10.2298/tsci140917037d
- Ashrafian, T. et al., Methodology to define cost-optimal level of architectural measures for energy efficient retrofits of existing detached residential buildings in Turkey, Energy and Buildings, 120 (2016), pp. 58-77, doi: 10.1016/j.enbuild.2016.03.074
- Corrado, V. et al., Refurbishment of the Residential Building Stock toward the Nearly-Zero Energy Target Through the Application of the Building Typology, Energy Procedia, 101 (2016), pp. 208-215, doi: 10.1016/j.egypro.2016.11.027
- Ramallo-González, A.P. et al., New optimisation methodology to uncover robust low energy designs that accounts for occupant behaviour or other unknowns, Journal of Building Engineering, 2 (2015), pp. 59-68, doi: 10.1016/j.jobe.2015.05.001
- ****, Rulebook on energy efficiency of buildings, Official Gazette of the Republic of Serbia, 61 (2011) (In Serbian)
- ****, International Standard ISO 13790, Energy performance of buildings — Calculation of energy use for space heating and cooling, ISO copyright office, 2008
- ****, Serbian Standard SRPS EN 15459, Economic performance of buildings — Economic evaluation procedure for energy systems in buildings, Institute for Standardization of Serbia, 2012