Ventilation systems
It was imperative that the hospital reduce its
power load, as we were getting very close to
reaching our available electrical capacity
and energy usage for each. Our team also provided a full technical and financial analysis of the three chiller options (see Fig. 1), presenting the Hospital with the complete picture, and enabling it to make a fully informed decision, having compared capital costs, annual running costs, total annual power consumption, and annual CO2
emissions. The hospital was also provided with the
10-year costs for basic preventative and full comprehensive maintenance, and these costs were incorporated into the 10-year costing for capital equipment and power.
Engineering thinking With its comprehensive range of ‘green’ specialisms, Henderson Green is committed to the innovative, yet common sense, design of sustainable buildings, and the engineering services that serve
them. It offers its clients sound mechanical and electrical engineering services design advice based on a holistic approach that utilises passive design techniques wherever possible. The chiller replacement project at
Basingstoke and North Hampshire Hospital is a prime example of a holistic approach, with the both capital and lifecycle costs taken into consideration, along with the environmental impact of the solutions. In this instance the Hospital
took the long-term view, and once in possession of the full facts, it was able to make the best investment decision. Firstly, being critical to the continued
operation of the theatres, it is essential that the chilled water plant is robust and reliable, and can be easily maintained. It was agreed, therefore, that the new plant should be floor mounted for ease of maintenance. Secondly, the very high efficiency and correspondingly low running costs of the air-cooled magnetic motor drive Turbocor chillers was enough to persuade the Hospital to opt for this option, even though they required a higher initial capital investment.
Henderson Green’s Managing Director, Russ Pitman; his healthcare expertise includes work in both clinical environments and the estate.
Magnetic drive technology The new Airedale TurboChill is a high capacity unit offering innovative technology designed around revolutionary centrifugal Turbocor compressors integrated with cutting edge components. It boasts low maintenance, low cost in use, low carbon emissions, and has a long life expectancy. The units are practically silent in operation, which was one of the key factors in the Hospital’s final decision. The machines feature permanent magnetic motor chillers with oil-free compressors and very high seasonal efficiencies, and, to meet the 1,200 kW demand, two 600 kWunits were selected. The ‘TurboChill’ is designed and
AylesburyŒ
IHEEMHealthcare Estates Exhibition
Stand B14
Health Estate Journal September 2013
61
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