Two important issues concerning NZEB development are: from one side to guarantee specific heating-cooling balance for each climatic condition, taking into account thermal comfort and indoor environmental quality, and from the other side to enhance the reduction of construction and management costs, ensuring the fulfillment of NZEBs standard requirements. In this paper these two aspects have been analyzed. Numerical analyses under transient thermal conditions demonstrated that passive design (night ventilation and shadings) allow to minimize the overheating risk in summer season and consequently to avoid the installation of an active cooling system: up to 65% average cooling demand reduction can be obtained; 1.5 air change rate of night ventilation allowed to reduce the overeating risks to 16 hours only. Furthermore, the development of low-cost technical solutions in the construction phase guarantees up to 25% reduction of investment costs and high final savings, considering operational costs over the entire building life cycle (50 years). The Net Present Value of the four scenarios range from 63 €/m 2 to 140 €/m 2

On the cost reduction of a nearly zero energy multifamily house in Italy: Technical and economic assessment / Zinzi, M.; Mattoni, B.; Roda, R.; Ponzo, V.. - In: ENERGY PROCEDIA. - ISSN 1876-6102. - (2018), pp. 3774-3781. ((Intervento presentato al convegno 10th International Conference on Applied Energy, ICAE 2018 tenutosi a Honk Kong [10.1016/j.egypro.2019.01.877].

On the cost reduction of a nearly zero energy multifamily house in Italy: Technical and economic assessment

ZINZI, MICHELE;Mattoni B.;
2018

Abstract

Two important issues concerning NZEB development are: from one side to guarantee specific heating-cooling balance for each climatic condition, taking into account thermal comfort and indoor environmental quality, and from the other side to enhance the reduction of construction and management costs, ensuring the fulfillment of NZEBs standard requirements. In this paper these two aspects have been analyzed. Numerical analyses under transient thermal conditions demonstrated that passive design (night ventilation and shadings) allow to minimize the overheating risk in summer season and consequently to avoid the installation of an active cooling system: up to 65% average cooling demand reduction can be obtained; 1.5 air change rate of night ventilation allowed to reduce the overeating risks to 16 hours only. Furthermore, the development of low-cost technical solutions in the construction phase guarantees up to 25% reduction of investment costs and high final savings, considering operational costs over the entire building life cycle (50 years). The Net Present Value of the four scenarios range from 63 €/m 2 to 140 €/m 2
File allegati a questo prodotto
File Dimensione Formato  
Zinzi_On-the-cost-reduction_2018.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 946.38 kB
Formato Adobe PDF
946.38 kB Adobe PDF Visualizza/Apri PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/1274987
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 3
social impact