The Queens Hospital in Burton offers a wide range of facilities that utilise many different types of equipment. Some of the services offered include is a full complement of Accident and Emergency, outpatient and direct access services. All specialties are supported by a comprehensive range of clinical services in therapies, pharmacy, pathology, and radiology. In addition, there are two MRI Scanners, two CT Scanners, a dedicated endoscopy suite, a breast care unit, stroke facilities and modern maternity units.
The Out Patients department at Burton Hospitals NHS Trust is located on an upper floor. Although the Queens Hospital is not an old building no provision was made for ventilation or cooling of these areas. As a direct consequence of this, temperatures exceeding 33C were routinely experienced during the summer months.
The hospital reached out to EcoCooling for a fresh air cooling solution to provide natural fresh air to the patients as well as provide a cost effect and environmentally friendly solution this particular section of the hospital.
EcoCooling were able to install two side discharge EcoCoolers, in conjunction with sound attenuation, these were installed on the flat roof over the out-patients area.
Each of the units are linked to an extraction fan to provide a balanced ventilation system. An automatic control system, linked to a thermostat, sets the fan speed and cooling mode to maintain a set point temperature.
A key consideration by the Hospital Facilities Management was the legionella safety of the EcoCoolers.
Legionnaires’ disease is a form of pneumonia. It is contracted by breathing in very small droplets of water contaminated by Legionella bacteria. It is estimated that there are over 40 million evaporative coolers worldwide and there has never been a case of Legionnaires’ disease attributed to a wetted media evaporative cooler.
UK legislation regarding Legionnaires’ disease is contained in an HSC guide called Approved Code of Practice (ACOP) Legionnaires’ Disease: The control of legionella bacteria in water systems L8.
The risk at each stage of the pathway to Legionella infection is analysed. The low-risk status is achieved through the EcoCooler design and process controls which reflect the ACOP guidelines.
Avoidance of stagnant water: An EcoCooler drains when not in cooling mode. When in cooling mode the water is continuously circulating.
Low water operating temperature: The water in an EcoCooler circulates at the ‘wet bulb temperature’ of the ambient air. In the UK this is normally below 20C where legionella bacteria are considered dormant.
Avoidance of corrosion and scaling: The all-plastic construction, together with an automatic water control system, prevents corrosion or scale formation
No production of aerosols: The ‘wetted media’ cooling pads provide pure evaporation without production of droplets.
Maintenance: All EcoCooling units are maintained at regular intervals.
A unique four level water probe provides continuous monitoring of the status of a cooler and validates the hygienic operation of the EcoCooler.