Abstract
Energy consumption in the world increases, so the measures in order to improve energy efficiency must be found. The aim of 2012/27/EU Energy Efficiency Directive targets is to decrease energy consumption for a final energy consumer by 1.5% every year, but there is no definition how these targets could be achieved by an individual member state. This article presents the analysis how these targets could be achieved by the means of individual heat metering by heat cost allocators for every flat thus decreasing an energy consumption for a final consumer. Statistical analysis of identical buildings with individual metering by heat cost allocators and without them is presented. Heat cost allocators do not decrease energy consumption by themselves, so this article presents a technical solution and a set of additional equipment, i.e. thermostatic valves, balance valves, hot water meters and remote data collection system that must be installed. The final results show that the targets of 2012/27/EU Energy Efficiency Directive in Lithuania can be reached, because the buildings with individual heat cost allocators consume about 20–30% less of heat energy. Pasaulyje energijos vartojimas auga, todėl turi būti rastos energetinio efektyvumo pagerinimo priemonės. 2012/27/ES Energijos Efektyvumo Direktyvos tikslas yra sumažinti galutinio energijos vartotojo energijos suvartojimą kasmet po 1,5 %, tačiau nėra nurodyta, kaip kiekviena valstybė narė šiuos tikslus galėtų įgyvendinti. Šis straipsnis pristato analizę, kaip šie tikslai galėtų būti pasiekti, kiekviename bute įrengiant individualios šilumos apskaitos šilumos daliklius, kad sumažėtų energijos vartojimas atskiruose butuose. Pateikta statistinė identiškų pastatų su šilumos dalikliais ir be jų analizė. Šiluminei energijai taupyti neužtenka vien tik šilumos daliklių, todėl straipsnyje pateiktas techninis sprendimas – būtinų įdiegti techninių priemonių paketas, kurį sudaro tokios priemonės: termostatiniai ventiliai, balansiniai ventiliai, karšto vandens skaitikliai, belaidė reguliaraus duomenų nuskaitymo sistema. Galutiniai analizės rezultatai rodo, kad 2012/27/ES Energijos Efektyvumo Direktyvos tikslai Lietuvoje gali būti pasiekti, nes pastatai su individualia šilumos apskaita ir įrengtais šilumos dalikliais vartoja apie 20–30 % mažiau šiluminės energijos nei pastatai be tokios apskaitos.
Highlights
The role of final customer in energy efficiency processWorld fuel prices have advanced and global warming still is increasing, so the attention is paid not to how to extract ever greater amounts of energy, but how to use extracted primary energy more efficiently
The European Union aims to deal with this problem, and to increase the efficiency of primary energy use, the European Parliament and of the Council on 25 October 2012 has approved the 2012/27/EU Energy Efficiency Directive which replaces Directives 2009/125/ EC and 2010/30/EU and repealing Directive 2004/8/EC and 2006/32/EC
As a private house has the possibility to select the free type of fuel and does not have a necessity to heat by expensive gas, can keep the desired temperature comfort level according to their income level, decrease temperature for the night, weekend or other desired time period of day, the multi-apartment buildings do not have such flexible options
Summary
World fuel prices have advanced and global warming still is increasing, so the attention is paid not to how to extract ever greater amounts of energy, but how to use extracted primary energy more efficiently. This task is more complex not from the point of view of technical or engineering solutions, but taking a look from our country’s legal framework, which precisely and unequivocally does not identify the entities responsible for the heat consumption in buildings This legal framework was made by the European Parliament in the Efficiency Directive, which aims that energy distributors and retail energy sales companies would get for end-consumers annual new energy savings equivalent to 1.5%. This article presents the analysis how 2012/27/EU Efficiency Directive targets can be achieved by the means of individual heat metering – by installing heat cost allocators for every final customer (flat) that decreases energy consumption for a final consumer. Independent heat substation for heat and hot water preparation (the analysed 1. buildings almost have reconstructed heat substations, so if heat substation is not reconstructed, the potential energy savings will be much more higher)
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