The Temporary HVAC Overlay project at the Lee Valley Olympic Basketball Courts
HVAC Overlay- ACR were contracted by Nussli Switzerland to supply a complete on-hire HVAC system to the temporary basket training structures built on the Lee Valley park.
The project was designed from the ground up by Advanced Climate Rentals. Cooling load was calculated at 220kw per court with an additional 150kw for the changing and mixed use areas. A marginal heating requirement was envisaged for early morning and evenings. A fabric air-sock distribution system was recommended- these distribute air evenly over large areas reducing drafts/ cold spots.
ACS 160.120 climate control air handling systems were specified for their high air volume, heating and cooling capabilities. Sophisticated on board electronic controls offered the capability to control the space temperature closely to the design of 22 Degrees. A centralised chilled water system was specified, including; 1x Carrier 700Kw water chiller, a 23kw twin head pump station and a reinforced rubber hose distribution system with stainless steel fittings. Chilled water flow was controlled locally at the AHU’s with a three port diverter valves.
The system was installed within 3 days and operational for a period of 3 months during the training and games periods. 24/7 engineering support ensured reliability at all times.
Overall this system offered exceptional service. Temperature control of 2 Degrees around set-point was achieved, well with the 8 degrees specified. In the hottest conditions with a 36 Degree outside ambient Temperature the system maintained a internal of 24 Degrees- a 12 degree differential.
Early in the project due to considerable rain-fall dehumidification was required- high levels of water were removed by reducing chilled water flow temps and using the AHU’s heaters to simultaneously reheat space supply air.
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