Giedrius Šiupšinskas

Energy Efficiency Challenges in Multi-Apartment Building Renovation in Lithuania

Abstract The paper presents a position of the authors on the current setup of the multi-apartment renovation process in Lithuania. The conducted investigation includes the actual case study analysis of the group of residential buildings in Birstonas. The paper deals with three areas that have a major impact on the success of the overall renovation process. The areas include the currently applied mechanisms for identifying and evaluating energy efficiency measures, data analysis of measuring actual energy efficiency and determination of the economic feasibility of the renovation process. Research results clearly indicate that the current shape of the program scheme is far from completion. The paper produces recommendations and research findings that could be used for further improvement on the process.

An advanced multi-criteria evaluation model of the rational building energy performance

AbstractDifferent optimization methods generate a large variety of solutions that are suitable for achieving the sets of chosen objectives. The selection of appropriate design variables and objective functions are essential elements in the optimization process. However, the existing methodologies seem to be too complicated and designers seek to use simplified methods in order to evaluate the overall performance of the buildings. The advancement of information technology enables the use of Building Information Modelling and energy simulation tools for the integrated building design in an early stage. Thus, this article introduces a new evaluation method for analysis of the effective solution of the building performance and aims at determining the influence of a complex criteria (construction duration, construction cost, annual bill-based costs, annual primary energy demand, annual CO2 emissions of energy use, CO2 emissions of construction materials and works, thermal comfort) for the final decision making....

Data File of the Building Site’s Renewable Energy Characteristics

After choosing the engineering solution of Integrated whole Building Design Process (IWBDP) and Global Optimized Local Designed (G.O.L.D) one of the most important elements of the creative process becomes the input data. There is a lack of comprehensive approach to the locally disposed building site’s RE and higher overall exploitation of this potential. That is why there is a need to have a prepared data file presenting building site’s energy potential. The aim of the described work is to create the input data file, to present the file creation process and the key characteristics. Building site data must be handy not only for the initial conception creation stage, but also for the subsequent operating and maintenance of the building on going through the BIM systems. Data must be based on the long-term observations and target research of the building site. Data file is required to provide information about the standard nature processes occurring in the defined geometric boundaries of the site. The results of the work are the proposed forms of input data file, structure and main energy characteristics of the building site. When planning the development of the building site, creating the design concept, and selecting the combination of RE integration technologies, data array proposed in the article will allow a more objective selection of the optimal solution of RE integration.