SUSTAINABLE BUILDING DESIGN
lighting, it resulted in the use of circadian rhythm low-energy LED lighting to mimic natural daylight patterns internally. Examples of the sustainable approach
taken included incorporating guidance within the EPBD (Energy Performance of Buildings Directive) and NZEB (Nearly Zero Energy Buildings). Specifically, after a ‘fabric first’ approach to the building with air permeability, other elements included a full roof of integrated solar photovoltaics, reversible ground-source heat pumps for both heating and active cooling applications with desuperheaters for hot water generation. In addition, ground loops in excess of
100-metres deep that allow for passive cooling by rejecting the building’s heat into the ground during ideal conditions were included. All opportunities to improve sustainability of the building were considered, including ridge-mounted wind turbines, solar hot water generation, passive underfloor cooling and adaptive shading. As a result, ground-source heat pump
technology is generating approximately 215,000 kilowatt-hours (kWh) per annum of heat and offering a simple payback of approximately seven years due to 20-year fixed, government-backed Renewable Heat Incentives. The full roof of integrated solar photovoltaics also generates up to 147kWh per hour. By offering technology that provided
payback over its lifespan, i.e. ground- source heat pumps and photovoltaics, the initial capital costs could be stretched, this has resulted in a sizable reduction in carbon emissions emanating from the built environment and a standard that has been set for future developments of this kind with the local authority. Additionally, a high level of building
control and automation was provided to measure and optimise the energy efficiency, which included: energy sub- meter for gas, electrical and heat services, plant control and monitoring for all central plant along with fault indication and reporting. Metering of the renewable energy systems together with monitoring of energy consumption was necessary to allow the client to claim the applicable feed in tariffs and renewable heat incentive payments. As the project was nearing completion,
the commissioning and setting to work of all systems were carefully managed and demonstrated. The result was effective and efficient plant operation, with planned ongoing seasonal maintenance and commissioning to monitor performance. Regular monitoring of energy
consumption now takes place as part of the planned maintenance strategy. This information is fed back through the design team and influences future projects helping to inform and improve on published energy consumption guidance.
106 IFHE DIGEST 2022
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