Rozwiązania konstrukcyjno-instalacyjne budynku a zapotrzebowanie na energię cieplną
Artykuł w czasopiśmie
| Status: | |
| Warianty tytułu: |
Influence of modernization activities on demand of thermal energy in buildings
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| Autorzy: | Dumała Sławomira, Skwarczyński Mariusz |
| Rok wydania: | 2011 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | polski |
| Numer czasopisma: | 2 |
| Wolumen/Tom: | 13 |
| Numer artykułu: | 116 |
| Strony: | 1795 - 1808 |
| Web of Science® Times Cited: | 3 |
| Bazy: | Web of Science |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| European Union Member States, including Poland, undertaken efforts to fulfill Kyoto Protocol limitation and energy consumption and increased par-ticipation of renewable energy resources in the overall production. Building construction and exploitation is among the most energy consuming activities. Absorption of energy in buildings is limited by Directive 2002/91/EC, which regulates either existing buildings and directions of their improvement or new buildings to be designed. In Poland guidelines from directive have been defined by package of legal acts, which includes the Ordinance of the Ministry of Infrastructure, issued January 21, 2008 regarding methodology of calculate characteristic of energy in buildings. This ordinance suggest, that index of primary energy EP compared with reference index evaluate power consumption in buildings. Existing building (heated area Af = 136.56 m2 and volume V = 520 m3) without basement, was considered for modernization decreasing energy con-sumption. As the starting point for the calculation was the coal-fired furnace controlled manually. Three different insulation materials groups, distinct type of additional installations (i.e: solar and ventilation system with heat recovery coefficient η = 0.8) as well as three different energy sources and their combination were con-sidered in simulations. The impact of modernization activities on the primary energy index (EP), final energy index (EK) and estimated annual cost of total consumption of energy building was considered. Based on simulations obtained that the change in isolation class build-ing with isolation 1 to 2 causes an average rate of EP reduction for coal-fired furnace, gas furnace and condensing boiler of 20.5% and the biomass boiler by 11.1%. Changing the thickness of the isolation of the option 2 for Isolation 3 will be reducing respectively the rate of EP by 14.3% and 6.8%. The final energy demand of buildings was used to calculated estimated annual cost because only EK index take into account the size of usable energy. For example, in the case of the coal-fired furnace with the ventilation system and isolation 3 EP was 212.74 kWh / (m2·year) with an annual estimated cost of energy consumption 2298 zł/year. For comparison, the installation equipped with a biomass boiler and isolation 1 EP was 114.34 kWh /(m2 ·year) but the estimated annual cost of energy consumption was 5118 zł/year. Summarizing, only combination of biomass as a fuel and energy saving via proper insulation allows to achieve the reference index. Moreover reduction of EP index is not proper indicator of low annual cost of energy building con-sumption. |
