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"Worldwide, buildings are responsible for over 40% of the total primary energy use and related greenhouse emissions - Leaving Cert Construction Studies - Question 10 - 2020
Question 10
"Worldwide, buildings are responsible for over 40% of the total primary energy use and related greenhouse emissions. Through standards and energy efficiency programs... show full transcript
Worked Solution & Example Answer:"Worldwide, buildings are responsible for over 40% of the total primary energy use and related greenhouse emissions - Leaving Cert Construction Studies - Question 10 - 2020
Step 1
Discuss the above statement in detail.
Answer
Buildings are a significant contributor to global energy consumption and greenhouse gas emissions, accounting for over 40% of total primary energy use. Therefore, enhancing the energy performance of buildings is crucial for mitigating climate change.
Several countries have taken steps to improve this performance through various programs, such as energy efficiency initiatives and standards. For instance, the introduction of the Building Energy Rating (BER) system has provided a framework for assessing and improving the energy efficiency of buildings in Ireland. This certification can inform potential occupants about the energy performance of buildings before they rent or purchase them.
Moreover, the implementation of stringent building regulations, like the 2019 Building Regulations in Ireland, has set minimum energy performance standards that all new buildings must meet. This is aimed at ensuring that energy use is minimized from the onset of construction. Furthermore, programs promoting retrofitting existing buildings can lead to substantial savings on energy costs and carbon emissions, with modifications often yielding reductions of 75-90% in annual energy requirements.
It is also essential that energy efficiency be considered throughout a building's life cycle, from design through operation and eventual deconstruction. By focusing on renewable energy sources and sustainable design practices, the built environment can drastically reduce its ecological footprint and contribute positively to combat climate change.
Step 2
Propose three best practice guidelines that would ensure all buildings are retrofitted in the most sustainable way possible to minimise their primary energy use and improve their energy performance.
Answer
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Retrofitting Existing Structures: Upgrading or renovating existing buildings significantly reduces their annual energy needs. By improving insulation, replacing windows, and incorporating energy-efficient systems such as heat pumps, buildings can achieve substantial improvements in energy performance.
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Adopt a Systematic Retrofit Approach: A whole-systems approach should be embraced in retrofitting, ensuring that all building elements (including the building envelope, heating systems, and appliances) work synergistically. This holistic strategy enhances overall performance and aligns with national energy standards.
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Integrate Renewable Energy Sources: Incorporating renewable energy technologies such as solar panels or wind turbines in building retrofits can further reduce reliance on fossil fuels, thereby minimizing energy use in the long run. This not only addresses energy performance but also supports sustainability goals.