CONSTRUCTION
acoustic concerns due to current and projected noise levels did not allow for natural ventilation, a variable mechanically ventilated system was proposed which emulates natural ventilation by varying supply air, rather than providing conditioned air to a set-point in summer.
On-site energy production Feasibility studies were undertaken into LZCT and low carbon on-site energy production. Combined heat and power systems were not considered viable, due to the building’s relatively low hot water and low heating demands, and CHP’s poor carbon footprint. Further, a decision was made to follow an electric hot water route to reduce the risk of ceiling void heat gain, and its impact on cold water distribution. There were no district heating networks close to the site feasible for connection, so the obvious low carbon route was heat generation by electric fuel systems only. This was further considered the most appropriate strategy due to decarbonisation of the electricity grid, which will mean that in future years the building will be ‘carbon neutral’. Ground source heat pumps were not
considered feasible due to costs and associated risks, and the system only needing to provide heat, and thus not allowing the ground to ‘recharge’. The feasibility report concluded that air source
On the top floor, a contrasting elevation of metal and glass to reduce the building’s perceived scale, and create interest on the skyline, will contribute to a new community building which Parkhead can be proud of.
heat pumps were the most viable low energy heating system, and would be combined with roof-mounted photovoltaic panels.
Developed design Stage – RIBA 3/4 Through the RIBA 3/4 design period the team worked to develop a building form to optimise the passive design philosophy established in the pre-design stages. This included refinement of solar shading, window opening requirements for natural ventilation, and refinement of high-efficiency construction materials. Refinement of mechanical services strategies was undertaken in tandem with operational energy analysis – used as a strategy to interrogate the impact
of adjustments to the services strategies to overall building energy usage using dynamic simulation modelling. As part of this operational energy analysis, stakeholder workshops analysed how similar buildings have been used, as a basis for operational profiles of building areas. Unregulated electrical loads were defined by the client in line with these operational profiles to give annual building energy consumption, helping inform the ‘Scope 2’ emissions.
Post-occupancy measures The difference between simulated and real-world energy performance depends on several difficult-to-predict factors. Case studies show that one key factor causing
Precise airflow for a healthy return to normal! Exacta Boost
Exacta-Boost: designed for a post pandemic world to provide boosted airflow in parts of the ventilation system where needed - ensuring increased airflow, air quality, and system accuracy. Ideal for use in primary care facilities, assisted living communal areas and waiting rooms.
IMPROVED VENTILATION - SUSTAINABILITY - FLEXIBILITY
www.sensing-precision.com -
info@sensing-precision.com - 01494 363333 September 2022 Health Estate Journal 37
Used courtesy of Hoskins Architects
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