Energy certificate – tool for building renovation

Energy Performance Certificate for buildings is an European instrument for promotion of energy efficiency. Present work deals with the Energy Performance Certificate in Slovenia, as provided by current legislation. The first part deals with the methodology of calculation of energy indicators in the case of apartment building in Ljubljana. By comparing the calculated values with the measured ones the thesis tries to find the causes of deviations and offer solutions for improvement of certification protocol. Furthermore a comparison of results from different assessors is done, in terms of repeatability of the results, and some proposals for improvement are made. In the second part of the study possible improvement measures for more efficient energy use in buildings are investigated on the case of existing old apartment building. A simple life cycle cost analysis is performed and comparison between different renovation scenarios is done. It provides a proposal for the integration of the above recommendations in energy performance certificate of buildings

Scenario Analyses Concerning Energy Efficiency and Climate Protection in Regional and National Residential Building Stocks. Examples from Nine European Countries. - EPISCOPE Synthesis Report No. 3

This report documents methodological aspects and selected results of the scenario analyses to assess refurbishment as well as energy saving processes and project future energy consumption.. It covers scenario calculations conducted for regional residential building stocks in Salzburg/Austria, the Comunidat Valenciana/Spain, the Piedmont Region/Italy, the national non-profit housing stock in the Netherlands as well as the national residential building stocks in Germany, England, Greece, Norway, and Slovenia. Thereby, the objective of the scenario analysis is not a prediction of future energy demand in the respective building stock. Rather, the objective is to show the potential future impact of predefined assumptions. This may help respective key actors and policy makers to decide on strategies and policies for transforming building stocks towards carbon dioxide neutrality

Tracking of Energy Performance Indicators in Residential Building Stocks – Different Approaches and Common Results - EPISCOPE Synthesis Report No. 4

A central task of IEE EPISCOPE project was to carry out energy balance calculations and scenario analysis for national, regional or local residential building stocks against the background of energy saving and climate protection targets. The EPISCOPE Synthesis Report No. 4 documents the individual approaches of collecting information for the investigated residential building stocks as a foundation for building stock models and scenario calculations. Issues related to the availability of data and data quality are discussed, and concepts for a continuous monitoring (a regular data collection) are presented as a basis for a future tracking of energy performance in the observed building stocks

A Bottom-Up Building Stock Model for Tracking Regional Energy Targets—A Case Study of Kočevje

The paper addresses the development of a bottom-up building stock energy model (BuilS) for identification of the building stock renovation potential by considering energy performance of individual buildings through cross-linked data from various public available databases. The model enables integration of various EE and RES measures on the building stock to demonstrate long-term economic and environmental effects of different building stock refurbishment strategies. In the presented case study, the BuilS model was applied in the Kočevje city area and validated using the measured energy consumption of the buildings connected to the city district heating system. Three strategies for improving the building stock in Kočevje towards a more sustainable one are presented with their impact on energy use and CO2 emission projections up to 2030. It is demonstrated that the BuilS bottom-up model enables the setting of a correct baseline regarding energy use of the existing building stock and that such a model is a powerful tool for design and validation of the building stock renovation strategies. It is also shown that the accuracy of the model depends on available information on local resources and local needs, therefore acceleration of the building stock monitoring on the level of each building and continually upgrading of databases with building renovation information is of the utmost importance

Bottom-up modelling of continuous renovation and energy balance of existing building stock: case study Kočevje

A dynamic bottom-up model of the building stock is developed and implemented in a case study of Kočevje urban region. In the model, national register of real estate is cross-linked to data from other registers, e.g. the energy performance certificates (EPC) and the subsidized energy renovation measures. Regular updates of the data in registers enable continual improvement of the model. Therenovation potential is determined with respect to the age of building components after the last renovation, while the energy performance of the building stock is based either on the EPC for a particular building if available or on the energy indicators of corresponding building type from IEE EPISCOPE building typology and IEE RePublic_ZEB. Thus, the bottom-up model of the building stock (BuilS) enable a profound overview of the total heat demand, final energy use and CO2 emissions of the entire stock. In the case study Kočevje, various strategies for improving the buildings towards more sustainable ones are presented with projections to 2030. The strategies, reference and intensive renovation scenario, are compared with more ambitious strategy that the municipality is looking towards in the frame of Covenant of Mayors commitment. The bottom-up model was validated against the metered energy use of buildings connected to district heating. In the case study the model shows how the implementation of various strategies lead to different impacts and how the ambitious municipal plans are going to produce independence from fossil fuels by fostering the use of wood biomass as a locally available sustainable energy supply. The Kočevje case study analysis demonstrates, at the local level how a concept of increasing renewable energy sources utilisation and building energy efficiency stimulated by progressive measures can respond to low carbon society and sustainable energy selfsupply challenges