Infrastructure Engineering - Research Publications

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    A multi-layered energy resilience framework and metrics for energy master planning of communities: A university campus case study
    Charani Shandiz, S ; Rismanchi, B ; Foliente, G ; Aye, L (Society of Risk Analysis, 2021-12-05)
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    Lessons Learned from PCM Embedded Radiant Chilled Ceiling Experiments in Melbourne
    Mousavi, S ; Rismanchi, B ; Brey, S ; Aye, L (Instituto Superior de Engenharia do Porto, 2021-09-14)
    Buildings are responsible for over a third of energy consumption worldwide, particularly for the increasing demand of air-conditioners in response to the more extreme heat around the globe. It is imperative to move towards more energy-efficient space cooling alternatives. The integration of phase change material (PCM) with a radiant chilled ceiling (RCC) is a promising technology due to its benefits regarding energy efficiency and indoor environmental quality. This article presents a field study conducted on a newly-developed PCM embedded radiant chilled ceiling (PCM-RCC) installed in a stand-alone cabin located in Melbourne. The study evaluates the thermal and energy performance of the system through investigation of the transient thermal behaviour of PCM panels in charging-discharging cycles, the indoor comfort conditions, and the electricity peak demand. It was observed that the proposed PCM-RCC can provide satisfactory comfort conditions and contribute to load shifting if a refined operating strategy is applied. The efficiency of PCM recharge overnight depends on several factors that need to be carefully considered in design. The challenges related to the implementation of optimal operating dynamic schedules in response to the thermal behaviour of PCM-RCC, and accurate weather forecasting should be addressed to realise the full potential of this technology.
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    Lessons Learned from PCM Embedded Radiant Chilled Ceiling Experiments in Melbourne
    Mousavi, S ; Rismanchi, B ; Brey, S ; Aye, L (Elsevier, 2022-06)
    Buildings are responsible for over a third of energy consumption worldwide, particularly for the increasing demand of air-conditioners in response to the more extreme heat around the globe. It is imperative to move towards more energy-efficient space cooling alternatives. The integration of phase change material (PCM) with a radiant chilled ceiling (RCC) is a promising technology due to its benefits regarding energy efficiency and indoor environmental quality. This article presents a field study conducted on a newly-developed PCM embedded radiant chilled ceiling (PCM-RCC) installed in a stand-alone cabin located in Melbourne. The study evaluates the thermal and energy performance of the system through investigation of the transient thermal behaviour of PCM panels in charging-discharging cycles, the indoor comfort conditions, and the electricity peak demand. It was observed that the proposed PCM-RCC can provide satisfactory comfort conditions and contribute to load shifting if a refined operating strategy is applied. The efficiency of PCM recharge overnight depends on several factors that need to be carefully considered in design. The challenges related to the implementation of optimal operating dynamic schedules in response to the thermal behaviour of PCM-RCC, and accurate weather forecasting should be addressed to realise the full potential of this technology.
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    Dataset on validation of double U-tube borehole and seasonal solar thermal energy storage system TRNSYS models
    Shah, SK ; Aye, L ; Rismanchi, B ( 2021-08-09)
    This dataset includes data from the validation of double U-tube borehole and seasonal solar thermal energy storage system TRNSYS models. The simulated transient temperatures at various points of the systems were compared with the measured ones. To quantify the agreement between each simulated and measured temperature of interest, mean bias error (MBE), root mean square error (RMSE) and correlation coefficient (CC) were applied.
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    Alternative Heating and Cooling Systems for the Retrofit of Medium-Rise Residential Buildings in Greece
    Panagiotidou, M ; Aye, L ; Rismanchi, B (WILEY-V C H VERLAG GMBH, 2021-09-12)
    The European Union recently set the target of doubling building retrofit rates through the European Green Deal. Currently, more than half of the households’ energy consumption is accounted for space conditioning, with southern European countries experiencing increasing demand for cooling systems over the past decade. This article compares the performance of market-available heating and cooling systems that can replace the existing low-efficiency systems in multi-residential buildings in Greece. The study objectives are to minimize the operating greenhouse gas emissions and the life-cycle cost. Results demonstrate that air-to-air heat pumps have the lowest life-cycle cost. In areas where natural gas is not available, the replacement of the diesel-oil boiler with a biomass boiler leads to a 48% to 73% decrease of the operating greenhouse gas emissions. In areas where natural gas is available, the gas absorption heat pump has the lowest operating greenhouse gas emissions, demonstrating a reduction between 40% and 54% when compared to a conventional gas boiler; however, it dramatically increases the life-cycle cost, making it less attractive than heat pumps and condensing gas boilers. The findings are in line with the current residential space conditioning market, while indicating the potential of biomass boilers and gas absorption heat pumps.