BIM for Economic Green Retrofitting based on LEED- EBOM
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The current situation of global warming requires many actions to reduce the GHG emissions and resources depletion so the governments around the world defined several visions and plans to be achieved within long term and short-term programs. Built environment is considered as one of the main participants in the global warming since it releases 40% of the total GHG in the planet. Green retrofitting can be an effective solution to reduce the negative impacts of the existing built environment through optimizing the energy efficiency, reduce the energy and water consumption, maintain the internal comfort level, eliminate the usage of non-environmentally friendly building materials and many other practices that can be very effective. The proposed solutions should be evaluated based the green retrofitting standards like LEED-EBOM and should be costly viable since the owners are normally looking for minimum cost and shortest payback period. In the UAE, there are many projects were retrofitted and achieved significant savings through applying different strategies and initiatives to reduce the GHG emissions and resources consumptions. This research aims to check the potentials of green retrofitting actions that can be applied to upgrade an existing Nursery building to be LEED-EBOM certified and to reduce the cost of energy and water consumption by using Revit model for each retrofitting option which will help to calculate the amount of energy and water saving, the cost reduction, the payback period and the LEED-EBOM credits for each retrofitting options which include exterior wall insulation, double glazing windows installation, roof insulation, new AC system, air quality system, new lights with sensors, new solar water heaters and condensation system. The total energy reduction of the proposed retrofitting options is 43% (135987kW/year) and the reduction of water consumption is 56% (1022 m3/year) besides these savings, the internal environment will be better by adding fresh air unit and the AC will be unified for all spaces with minimum noise level and the building will be LEED-EBOM certified.