Context - Energy efficient housing is influenced by a number of attributes that describe the key players involved in its production. Stakeholders’ levels of interest, motivation, awareness and power to impose their decision can have an impact on housing energy performance. Understand-ing these stakeholder attributes can help resolve barriers to energy efficiency performance.
This conference series was initiated in Sendai, Japan in 2000 and has played a significant role in the development of Energy and Environment of Residential Buildings. It is well attended by researchers and academics from Asia, Europe and North America. The conference series offers an exciting program that not only facilitates research exchange between academics, but supports and facilitates dialogue with industry (housing providers) and government (housing regulators).
In 2016 the conference took place in Brisbane, Australia, adopting an overarching theme of Healthy Housing.
Purpose / Context –The purpose of this study is to investigate indoor environment and energy saving performance of houses, which employ passive ventilation systems, built in mild climate region and hot humid region in Japan.
Byron Shire, NSW, Australia, aims to transition to zero emissions within ten years in five sectors - energy, buildings, transport, land use and waste. This study investigates the potential of Geodesign to effectively map the shire during this transition. A contextual study of the shire's residential pockets is initiated using open source Geographic Information System (GIS) data and a typical case study site selected based on demographic information. CO2 equivalents from current electricity usage and offsets from renewable energy systems are added to the database and visualized in ArcGIS software. Site specific benchmarks are derived as the first step of developing a Regenerative Sustainability Design (RSD) strategy using Geodesign tools. The tenets of RS require each building to use systems that enhance overall ecosystem health by achieving positive outcomes for energy, waste, water, biodiversity, etc. ArcGIS is a system for designing built and natural environments in an integrated process. It enables evaluation of RSD alternatives against their impacts, collaborative decision making and community engagement (via apps, online surveys). Vector data can be directly quantified, multiple parameters accounted for and the onground situation presented to stakeholders in a legible and easy to understand format. Complex datasets can be quickly accessed and visualized in order to identify opportunities for positive contributions to the community. This work shows the value of Geodesign for community planning processes to drive positive change. ArcGIS can assist in holistic assessments to identify the most effective retrofit opportunities, monitor the transition to zero emissions over time and inform policy.
Problem: Roofs receive the most intense solar heat load among all building envelope surfaces in Equatorial-region. Solar heat gain through roof contributes to a significant portion of building heat load. In tropics where building cooling is needed all-year-round, passive methods to reduce heat gain through roof could provide significant cooling energy-savings.
Approach: Currently, the most widely adopted practices to curb the heat flux through roof include using thick building material-layer (30-40 cm-thick concrete) or insulation (5-10 cm-thick). This study investigates the thermal performance of emerging methods: cool roof and green roof. Cool roof works by applying a coating-layer having high-solar-albedo. Green roof works by adding a soil-layer and vegetation. This study numerically compares the heat curbing performances of these technologies under the tropical climate using an experimentally-calibrated EnergyPlus model.
Results and discussion: Cool roof performs best in reducing annual net heat gain in tropical climate of Singapore, which receives abundant irradiation. Cool roof reduces heat gain during day-time and promotes heat loss during night-time. Insulation and green roof are effective in curbing heat gain during day-time but they prevent heat loss during night-time.
Research limitations: This paper reports the investigation on a flat concrete roof as the base. Investigations on other roof base materials, e.g., metal roof, will be reported in future.
Originality: This is the first study that compares performances of cool roof, green roof and insulation against original concrete roof in tropical climate.
Purpose / Context – Energy efficiency measures/ private home-owners/ decision process
Methodology / Approach –Explorative research/ qualitative interviews/ content analysis
Results – Decisions towards energetic renovation measures can be characterized as a strategic consumer decision rather than the often assumed purely investment decision. Emotionally shaped motives seem to displace rational determinants such as financial savings and amortization.
Purpose: This paper set out to uncover the advice available to help people take effective action within our home to improve mental health. The literature and professions are virtually silent on the issue. The professional advice is often the opposite suggesting we should get out of our homes - go for a walk, exercise, play sport, go to the cinema, meet friends, socialise and don’t isolate yourself. There is nary any advice about what we can do to our homes to help maintain our mental health.
Purpose / Context - Many developed countries experience late afternoon or evening electricity peaks. In summer peak demand regions, these peaks are most likely the results of residential air conditioning demand. Methodology / Approach - This research is to investigate the air conditioning peak demand reduc-tion potential from a variety of building and operational improvement options in a community centre case. Scenarios of increased thermal mass (rammed earth), more efficient glass sliding door options and control methods are simulated. Results – Building improvement with integrated control performs best at reducing air conditioning peak demand and energy consumption. However, the control method is the most cost effective way of reducing the peak demand. Key Findings / Implications – The integrated design and operation strategy for the community centre would significantly alleviate the peak demand pressure on electricity network infrastructure and energy so as to lower the carbon footprint onto the environment. Originality – This study examined a residential community centre case from both design and opera-tion aspects. The simulation is completed in half hourly intervals under real world tariffs. Keywords - building improvement; thermal mass; operational strategy; air conditioning control; de-mand side management