Architects Paul Davis + Partners working with PHA Consult have won the Royal Society of Ulster Architects competition for 70 social and affordable houses to Code level 5 of the Code for Sustainable Homes at Carryduff, Northern Ireland. The competition attracted submissions from 61 practices from the UK, the RoI and mainland Europe.
The judging panel unanimously agreed the design submitted by PHA Consult and Paul Davis +Partners to be the winning entry. The Chairman’s report referred to the strong presentation by PHA Consult’s Tomas Selva.
Part of the focus of the Environmental Design involved using thermal modelling to optimise the orientation and sunspace specification of each of the homes.
The challenging natural contours of the landscape required careful planning to manage surface water runoff. Community tanks harvest rainwater collected from the roofs, which then supplied the water to each of the homes down the hill and avoid the need for energy intensive pumping. These strategies allowed the community to meet the stringent Code Level 5 water efficiency requirements whilst reducing costs.
A comparison of community heating schemes such as ground source and air to water heat pumps, as well as biomass and CHP followed; and attention was drawn to their relative advantages compared to single home integrated solutions.
The findings were used to assemble an integrated system using solar hot water and drainage heat recovery to maximise the efficiency of a heat exchanger connected to a single unit air to water heat pump concealed in the rear garden. Well positioned roof mounted PV panels provided renewable electrical energy to power a full house ventilation heat recovery unit. The system was designed to, in future, offer occupants the opportunity of grid independent zero carbon living.
Article in BD magazine (requires registration)