scholarly journals Primary energy and CO2 emissions for a district city and a suburb

2018 ◽  
Vol 13 (1) ◽  
pp. 59-69
Author(s):  
Anton Pitonak ◽  
Martin Lopusniak ◽  
Miloslav Bagona

Abstract In countries of the European Union, the proportion of buildings in the overall energy consumption represents 40% and their proportion in CO2 emissions 35%. Taking into account dependence of the European Union on import of energy, this represents large quantity of energy and CO2 emissions, in spite of the fact that there exist effective solutions for reduction of building energy demand. In Directive 20-20-20, the European Union adopted three main commitments of fulfillment criteria by 2020. On the basis of this directive, the Slovak Republic declares support of renovation of apartment dwelling houses. Taking into account the fact that state subsidy can be obtained only once, and energy requirements of the European Union are increasingly stricter, a comprehensive approach to renovation of buildings is inevitable. At the same time, it is inevitable to propose the renovation of buildings taking into account requirements stated for buildings for year 2020. Two areas were compared within the case study taking into account primary energy and the quantity of CO2 emissions. Both areas have the same built-up area, but one of them is a district city and the second is a suburb. From results it is obvious that the quantity of primary energy is lower by 88% in the district city than in the suburb. The quantity of CO2 emissions is lower by 69% in the district city than in the suburb.

2016 ◽  
Vol 32 (3) ◽  
pp. 5-22 ◽  
Author(s):  
Katarzyna Stala-Szlugaj

Abstract Due to the important role of hard coal in the Polish residential sector, the article traced the changes that have occurred in the use of this fuel in the European Union and in Poland in the years 1990–2014. Throughout the European Union, hard coal has an important place in the structure of primary energy consumption. In the years 1990–2014, primary energy consumption in the European Union (calculated for all 28 Member States) has changed between 1507 and 1722 million toe. Between 2014 and 1990, there was a decrease of primary energy consumption, and the average rate of decline amounted to −0.2%. According to Council Directive 2013/12/EU, by the year 2020 energy consumption throughout the EU is expected to be no more than 1483 Mtoe of primary energy, and already in 2014 total primary energy consumption in the EU28 was higher than assumed by this target by only about 24 million toe (2%). Actions taken to protect the climate result in reducing the consumption of hard coal in the European Union. Between 1990 and 2014, the consumption of hard coal decreased by 41% (a decrease of 126 million toe), and the average rate of decline in consumption of this fuel amounted to −2.1%. Throughout the EU, households are not as significant a consumer of hard coal, as in Poland. Although EU28’s coal consumption in this sector in the years 1990 to 2014 varied between 6.5–15.8 million toe, its share in the overall consumption of this fuel usually maintained at around 3–5%. The changing fuel mix, closing of mines or gradual extinction of coal mining, environmental policy of the individual countries meant that coal has lost its position in some of them. Analyzing the structure of hard coal consumption by households in the EU28 countries in the years 1900 to 2014, one may notice that the leaders are those countries that have their own coal mines. Due to the structure of consumption of hard coal by the customers, the article discussed two countries: Poland and Great Britain in greater detail. In 1990, Poland (50%) and Britain (18%) were close leaders, and twenty-five years later, only Poland has remained in first place (84%) and Great Britain has fallen to fourth place (4%). Between 2014 and 1990, the consumption of hard coal by the British residential sector decreased by 88% to only 0.3 million toe. In the case of Poland, it admittedly decreased by 6%, but still exceeds 6 million toe. The decrease in hard coal consumption in Great Britain was largely a consequence of The Clean Air Act introduced in 1956. In Britain, the process of replacing coal with other fuels (mostly natural gas) lasted several decades. Domestic coal was replaced with another mainly domestic resource – natural gas which ensured the security of its supply. The article also describes the households in the European Union and in Poland. The overall housing stock was taken into account, together with the distribution of population according to the degree of urbanization. Regulations that have a significant impact on the consumption of energy in the European Union were also discussed.


2016 ◽  
Vol 861 ◽  
pp. 198-205
Author(s):  
Anton Pitonak ◽  
Martin Lopusniak

In the members states of the European Union, portion of buildings in the total consumption of energy represents 40%, and their portion in CO2 emissions fluctuates around 35%. The European Union is trying to protect the environment by reducing energy demand and releasing CO2 emissions into the air. Energy performance is the quantity of energy, which is necessary for heating and domestic hot water production, for cooling and ventilation and for lighting. Based on results of energy performance, individual buildings are classified into energy classes A to G. A global indicator (primary energy) is the decisive factor for final evaluation of the building. The new building must meet minimum requirements for energy performance, i.e. it must be classified to energy class A1 since 2016, and to energy class A0 since 2020. The paper analyses effect of the use of different resources of heat in a family house designed according to requirements valid since 2020, and its subsequent classification into an energy class.


Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 2123 ◽  
Author(s):  
Lamberto Tronchin ◽  
Kristian Fabbri ◽  
Chiara Bertolli

Indoor air quality (IAQ) of buildings is a problem that affects both comfort for occupants and the energy consumption of the structure. Controlled mechanical ventilation systems (CMVs) make it possible to control the air exchange rate. When using CMV systems, it is interesting to investigate the relationship between the useful thermal energy requirements for ventilation and the energy consumption of these systems. This paper addresses whether there is a correlation between these two parameters. The methodology used in this work involves the application of equations of technical Italian regulations UNI/TS 11300 applied to a case study. The case study is represented by a 54 m3 room, which is assumed to have three CMV systems installed (extraction, insertion, insertion and extraction) for twenty different devices available on the market. Afterwards, simulations of useful thermal energy requirements QH,ve and primary energy EP,V were performed according to the electrical power of each fan W and the ventilation flow. The results show that the two values are not linearly correlated: it is not possible to clearly associate the operating cost for CMV systems according to building requirements. The study also shows that CMV systems are particularly efficient for high-performance buildings, where there is no leakage that can be ascribed to windows infiltrations.


2020 ◽  
Vol 12 (9) ◽  
pp. 3566
Author(s):  
Byung Chang Kwag ◽  
Sanghee Han ◽  
Gil Tae Kim ◽  
Beobjeon Kim ◽  
Jong Yeob Kim

The purposes of this study were to overview the building-energy policy and regulations in South Korea to achieve energy-efficient multifamily residential buildings and analyze the effects of strengthening the building design requirements on their energy performances. The building energy demand intensity showed a linear relationship with the area-weighted average U-values of the building envelope. However, improving the thermal properties of the building envelope was limited to reducing the building-energy demand intensity. In this study, the effects of various energy conservation measures (ECMs) on the building-energy performance were compared. Among the various ECMs, improving the boiler efficiency was found to be the most efficient measure for reducing the building-energy consumption in comparison to other ECMs, whereas the building envelope showed the least impact, because the current U-values are low. However, in terms of the primary energy consumption, the most efficient ECM was the lighting power density because of the different energy sources used by various ECMs and the different conversion factors used to calculate the primary energy consumption based on the source type. This study showed a direction for updating the building-energy policy and regulations, as well as the potential of implementing ECMs, to improve the energy performances of Korean multifamily residential buildings.


2021 ◽  
Vol 7 ◽  
pp. 2775-2783
Author(s):  
Bojan Pejović ◽  
Vesna Karadžić ◽  
Zdenka Dragašević ◽  
Tamara Backović

2014 ◽  
Vol 20 (6) ◽  
pp. 819-828 ◽  
Author(s):  
Vytautas Stankevičius ◽  
Jūratė Karbauskaitė ◽  
Arūnas Burlingis ◽  
Jolanta Šadauskienė ◽  
Romaldas Morkvėnas

Energy saving has become one of the foremost priorities in the European Union and a great deal of attention is directed towards the sector of sustainable building. However, the EU members that have an extensive Soviet heritage now face a great difficulty in reducing energy consumption. Since many apartment buildings are in especially poor thermal condition, and the heat supply infrastructure is morally and physically outdated, energy consumption for heating is significant. The modernization (renovation) of such old buildings is impeded not only by legal and technical factors, but also financial and social aspects in regard to the residents. Thus, this paper provides new model of investments and modernization of apartment buildings on the basis of the calculation of energy input per one degree-day of the heated floor area. The presented degree-days calculation method enables the calculation and inter-comparison of data gathered in all European Union member states without taking into account specific climate parameters of each.


Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4864
Author(s):  
Axel Bruck ◽  
Santiago Díaz Ruano ◽  
Hans Auer

Urban areas have been responsible for the majority of the European Union (EU)-wide primary energy demand and CO2 emissions. To address this issue, the European Union introduced the concept of Positive Energy Districts (PEDs). PEDs are required to have an annual positive primary energy balance. However, if directly addressed in the literature, this energy balance only includes annually fixed primary energy factors and often neglects grid impacts. To bridge this gap, this work proposes a mathematical optimisation approach for PEDs, working towards an open-source model. The model’s main novelty is an hourly primary energy balance constraint. The performed case study on the island La Palma for both an urban and a rural neighbourhood show that the PED concept has a higher net present value (NPV) than solely buying electricity from the grid in all feasible cases. Depending on the space available for PV installations, the NPV increases between 29 and 31% and 25–27% for the rural and urban PED scenarios, respectively. However, in the scenarios with reduced grid impact, the NPV decreases due to the expensive battery installations. Comparing the significantly fossil-based electricity grid mix of La Palma with the renewable-based one of El Hierro shows that the primary energy-based optimisation has more room for flexibility in the high renewable mix. While the dynamic primary energy balance constraint appears promising for operational optimisation, the allocation of correct primary energy factors is crucial.


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