ABSTRACT

Drastic reductions in energy consumption within existing buildings are required to achieve climate change mitigation targets. However, a portion of existing buildings have important historic values that need to be conserved. The goal of this paper is to present a methodology and decision-framework for deep energy retrofit analyses that balances trade-offs between conservation and sustainability. This methodology includes historic recording, documentation, a detailed energy model, and calibration to monthly data. An historic house in Ottawa, Canada is studied to demonstrate the use of the methodology. The energy retrofit analysis suggests 67% energy savings are achievable by increasing envelope thermal resistance to 4.1 m²-K/W, reducing air infiltration by 70% to 4.2 ACH at 50 Pa through air sealing and an air-vapour barrier, rehabilitating windows to be triple-pane low-E assemblies, using an air-source heat pump to supplement the existing gas boiler, daylight sensors and controls, and solar PV panels.

摘要

为了实现减缓气候变化的目标，需要大幅减少现有建筑物内的能源消耗。然而，部分现有建筑具有重要的历史价值，需要加以保护。本文的目的是提出一种用于深度能源改造分析的方法和决策框架，以平衡保护和可持续性之间的权衡。这种方法包括历史记录、文档、详细的能源模型和每月数据的校准。研究了加拿大渥太华的一座历史悠久的房子，以展示该方法的使用。能源改造分析表明，将外壳热阻增加到 4.1 m ^{2可实现 67% 的节能}-K/W，通过空气密封和空气蒸汽屏障，在 50 Pa 下将空气渗透减少 70% 至 4.2 ACH，将窗户修复为三层低辐射组件，使用空气源热泵补充现有的燃气锅炉、日光传感器和控制装置以及太阳能光伏板。