Energy-efficient retrofitting of historic housing stock requires methodical approach, in-depth analysis and case-specific regulatory system, yet only limited efforts have been realized. In large scale rehabilitation projects, it is essential to develop a retrofit strategy on how to decide energy-efficient solutions for buildings providing the most energy saving in a short time. This paper presents a pilot study conducted at a neighborhood scale, consisting of 22 pre-, early-republican and contemporary residential buildings in a historic urban fabric in the Mediterranean climate. This study aims to develop an integrated approach to describe case-specific solutions for larger scale historic urban fabric. It covers the building performance simulation (BPS) model and numerical analysis to determine the most related design parameters affecting annual energy consumption. All the case buildings were classified into three main groups to propose appropriate retrofit solutions in different impact categories. Retrofit solutions were gathered into two retrofit packages, Package 1 and 2, and separately, three individual operational solutions were determined, considering a five-levelled assessment criteria of EN 16883:2017 Standard. Energy classes of case buildings were calculated based on National Building Energy Regulations. Changes in building classes were evaluated considering pre- and post-retrofit status of the buildings. For the integrated approach, the most related design parameters on annual energy consumption were specified through Pearson correlation analysis. The approach indicated that three buildings, representing each building group, can initially be retrofitted. For all buildings, while maximum energy saving was provided by Package 2 with 48.57%, minimum energy saving was obtained from Package 1 with 19.8%.

中文翻译：

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地中海气候下历史悠久的城市结构能源效率的改进策略

对历史悠久的房屋进行节能改造需要采取有条理的方法，深入的分析和针对具体案例的监管系统，但仅能实现有限的努力。在大规模的修复项目中，必须制定一种改造策略，以决定如何在短时间内提供最大的节能量的建筑节能解决方案。本文介绍了一项在邻里规模上进行的试点研究，该研究由22座前，共和早期和现代的民居建筑组成，构成了地中海气候下具有历史意义的城市结构。这项研究旨在开发一种综合方法来描述针对大型历史城市建筑的案例解决方案。它涵盖了建筑性能模拟（BPS）模型和数值分析，以确定影响年度能耗的最相关设计参数。将所有案例建筑物分为三个主要类别，以针对不同的影响类别提出适当的改造解决方案。改造解决方案被收集到两个改造软件包中，分别是软件包1和2，并分别考虑了EN 16883：2017标准的五级评估标准，确定了三个单独的运营解决方案。案例建筑的能源等级是根据《国家建筑能源法规》计算的。考虑到建筑物的改造前和改造后状态，评估了建筑类别的变化。对于集成方法，通过皮尔逊相关分析，确定了与年度能耗最相关的设计参数。该方法表明，代表每个建筑物组的三座建筑物可以首先进行改造。对于所有建筑物，套餐2的最大节能量为48.57％，而套餐1的最小节能量为19.8％。