NZEB Renovation Definition in a Heating Dominated Climate: Case Study of Poland
Szymon Firląg , Michał Piasecki
AbstractThe main objective of this article is to propose possible requirements for NZEB (nearly zero-energy buildings) renovation definition in heating dominated climate. A survey was carried out on potential approaches and indicators that could be used for the NZEB definition of existing single-family houses in Poland. The process of determining requirements for the NZEB renovation definition was divided into two stages. The cost-optimal U-values of the building’s envelope were initially calculated and, based on them, the energy demand for heating (QH) and the reduction of non-renewable primary energy demand (QP) were estimated. The calculations were made for different energy prices, locations, and two building models. Based on them the requirements for cost-optimal renovation (QH ≤ 60 kWh/(m² year), QP reduction ≥ 75%) and NZEB renovation (QH ≤ 40 kWh/(m² year), QP reduction ≥ 80%) were proposed. In contrast to definitions using only a maximum level of QP, two indicators were used. Such a solution is appropriate for existing buildings because it prevents the situation in which only renewable energy sources (RES) (with a low primary energy factor) will be applied in order to decrease the primary, non-renewable energy demand.
|Journal series||Applied Sciences-Basel, ISSN 2076-3417|
|Publication size in sheets||1.2|
|Keywords in English||NZEB renovation; cost-optimal; single family house|
|ASJC Classification||; ; ; ; ;|
|Score||= 25.0, 20-04-2020, ArticleFromJournal|
|Publication indicators||= 4; = 5; = 15.0; : 2018 = 0.985; : 2018 = 2.217 (2) - 2018=2.287 (5)|
|Citation count*||16 (2020-05-11)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.