Nocera Francesco, Giuffrida Salvatore, Trovato Maria Rosa, Gagliano Antonio
Department of Civil Engineering and Architecture, University of Catania, 95123 Catania, Italy.
Department of Electric and Computer Engineering, University of Catania, 95125 Catania, Italy.
Entropy (Basel). 2019 Jun 28;21(7):639. doi: 10.3390/e21070639.
The paper addresses an important long-standing question in regards to the energy efficiency renovation of existing buildings, in this case hotels, towards nearly zero-energy (nZEBs) status. The renovation of existing hotels to achieve a nearly zero-energy (nZEBs) performance is one of the forefront goals of EU's energy policy for 2050. The achievement of nZEBs target for hotels is necessary not only to comply with changing regulations and legislations, but also to foster competitiveness to secure new funding. Indeed, the nZEB hotel status allows for the reduction of operating costs and the increase of energy security, meeting the market and guests' expectations. Actually, there is not a set national value of nZEBs for hotels to be attained, despite the fact that hotels are among the most energy-intensive buildings. This paper presents the case study of the energy retrofit of an existing historical hotel located in southern Italy (Syracuse) in order to achieve nZEBs status. Starting from the energy audit, the paper proposes a step-by-step approach to nZEBs performance, with a perspective on the costs, in order to identify the most effective energy solutions. Such an approach allows useful insights regarding energy and economic-financial strategies for achieving nZEBs standards to highlighted. Moreover, the results of this paper provide, to stakeholders, useful information for quantifying the technical convenience and economic profitability to reach an nZEBs target in order to prevent the expenses necessary by future energy retrofit programs.
本文探讨了一个长期存在的重要问题，即现有建筑（在此指酒店）向近零能耗（nZEBs）状态进行能效改造的问题。将现有酒店改造以实现近零能耗（nZEBs）性能是欧盟2050年能源政策的首要目标之一。酒店实现nZEBs目标不仅是为了遵守不断变化的法规，也是为了提升竞争力以获得新的资金。事实上，nZEB酒店状态有助于降低运营成本并提高能源安全性，满足市场和客人的期望。实际上，尽管酒店是能源密集型建筑之一，但并没有设定一个全国性的酒店要达到的nZEBs值。本文介绍了意大利南部（锡拉库扎）一家现有历史酒店的能源改造案例研究，以实现nZEBs状态。从能源审计开始，本文提出了一种逐步实现nZEBs性能的方法，并考虑成本因素，以确定最有效的能源解决方案。这种方法能够突出关于实现nZEBs标准的能源和经济金融策略的有用见解。此外，本文的结果为利益相关者提供了有用信息，以便量化实现nZEBs目标的技术便利性和经济盈利能力，从而避免未来能源改造计划所需的费用。
