The 2-storey centre houses the radiology academy, which trains doctors in diagnostic imaging such as X-rays, CT and MRI scans, and the hospital’s pathology department.
Consultant Integrated Building Services of Cambridge specified three 300 kW Ultramax floor-standing boilers and three Gemini 500 high-recovery calorifiers.
A key feature in the low emissions of Ultramax boilers is the downward-firing pre-mix, water-cooled burner, which achieves precise mixing of gas and air.
Because system water circulates inside the burner, the combustion temperature is 1200 to 1300°C. This is lower than the normal 1500°C and reduces NOx emissions to a yearly average figure of less than 32 mg/kWh.
Heat output can be modulated to 25% of full output.
Gemini high-performance calorifiers use the tank-in-tank system. The domestic hot water is heated and stored in a stainless-steel vessel within an indirectly heated primary tank. This system provides a very large surface area for heat exchange, which achieves high performance and rapid recovery and also eliminates the cool zone where bacteria can breed.
