Greening Existing Buildings [GEB] Strategies - A New Green Performance Assessment [GPA] Approach

現有建築物綠化策略 ─ 以新綠建評審法進行

Student thesis: Doctoral Thesis

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Award date25 Mar 2021

Abstract

Existing buildings have been causing adverse environmental effects with greenhouse gas emissions in the range of about 40% and consuming energy of about 35% in 2018 in the developing countries (Global alliance for buildings and construction, 2019).
This study gives a systematic approach to developing strategies for effectively greening the existing buildings [GEB] to combat this adverse environmental effect. The findings concluded that using the above GEB strategies can achieve a total of 40%-60% energy-savings. This high energy savings will contribute to carbon intensity reduction in the range of 20%-30%.

Green potentials of an existing building are the guidelines for the setup of GEB strategies to convert the EB into a green building. Assessment of the green potentials in an EB is rarely discussed in past literature. This research presents the development of a new Green Performance Assessment [GPA] rating tool to assess the green potentials of an EB/a group of buildings with similar functions under a single developer. Relevant literature and existing green assessment rating tools are reviewed to identify methods and green performance indicators that can be modified due to the lack of existing tools for assessing the green potentials of an EB. The next step of the research is to test and validate the GPA rating tool using a field study on a block of existing buildings with similar functions under a single developer, such as the estate residential buildings developed by the Housing Authority. Green refurbishments of large building blocks in this approach can offer more promising impacts on reducing the carbon footprints. A research model with hypotheses is set up to explore the effects of GPA on the GEB through the mediator of GEB strategies. The hypotheses were tested and validated on a field study of Hong Kong Housing Authority’s six residential buildings. The results show that the new GPA rating tool is sufficient as a simple and cost-effective method to assess the green potentials of a group of EBs with similar functions under a single developer. Apart from filling the knowledge gap, the findings will also assist policymakers, building owners, developers, planners, and other stakeholders in strategizing their efforts efficiently towards greening the large building stocks such as an estate of residential buildings or university campus.

    Research areas

  • Greening Existing Buildings Strategies, Green Performance Assessment, Green Performance Certification