BSEE INSTALLATION NEWS
Fresh air cooling solution for computer room cuts energy costs for hospital
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Continuous flow hot water units for caravan site
Rinnai, the manufacturer of continuous flow water heating systems, has transformed the hot water delivery
Creature comforts for Edinburgh Zoo’s tigers
ndangered species are feeling snug at RZSS Edinburgh Zoo thanks to Heat Mat’s inset electric heating. Heat Mat was asked to advise on the best heating system for the new Tiger Tracks home, which houses Jambi and Baginda, an adult breeding pair of rare Sumatran tigers. Four bespoke 200W heating mats have been laid on top of concrete plinths beneath bonded sand and soil inside the tigers’ house and another in the main enclosure. The new enclosure features a ground level viewing tunnel, covered pathways, high-level viewing area, feeding post and cubbing den, as well as climbing structures and
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splash pool and a heated rock to relax on, supplied by Heat Mat.
The tigers are not the first to benefit from Heat Mat technology. The zoo’s meerkats are also feeling toasty thanks to Heat Mat inset systems.
The zoo’s electrician, Stephen McNamee, sourced the underfloor heating system from local wholesalers, Ross Electrical. Branch Manager, Fiona Lothian, spoke to Heat Mat Project Engineer, Chris Palmer, who travelled to the zoo to discuss the best system.
Chris recommended a series of 160W heating mats – 2sq m, 11.6sq m and 5.2sq m for the enclosure, controlled by an NGT intelligent touch thermostat.
www.heatmat.co.u
REHAU used for district heating pipework replacement project
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heffield City Council has long led the UK in its commitment to the concept of district heating and many of its civic buildings are heated by district heating networks powered by waste energy.
The council’s commitment goes back to the 1970s and the pipework in some of its original networks is now in need of renewal. In one of the first
replacement projects of this kind, the original steel pipework at two social housing developments in the city has been replaced with REHAU’s RAUVITHERM pre- insulated polymer pipework. Deteriorating pipes had caused leaks at both sites in recent years, so the council decided to replace them to eliminate further leaks, which are costly to repair and inconvenient for residents. REHAU’s RAUVITHERM PE-Xa pipe was used because of
the long-term benefits of polymer over steel, including the corrosion resistance of PE-Xa and the ease and speed of installation. The system is supplied in continuous flexible lengths up to 330m so there are fewer joints required; and those that are fitted use the renowned REHAU EVERLOC leak free compression sleeve technology, already successfully installed more than 850 million times worldwide.
The Sheffield project involved the replacement of pipework in two separate networks feeding nearly 170 properties. On one of the projects, all of the distribution pipework from the plant room into the individual properties has been replaced, using a variety of pipe sizes from the RAUVITHERM range.
The installers were RJ Utility Services and the main contractors were Denton and Nickels.
www.rehau.co.uk/districtheating 8 BUILDING SERVICES & ENVIRONMENTAL ENGINEER DECEMBER 2016
mechanical cooling for a computer server room at Salisbury District Hospital. The computer room was previously cooled by two traditional CRAC units, originally designed for indoor application, but installed outside and partially weatherproofed. The system proved inefficient, with simple on-off operation, irrespective of the size of the load or ambient conditions. Fans were also beginning to fail due to long-term operation.
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Klima-Therm’s brief was to design a more energy efficient system to reduce energy running costs and provide reliable cooling for the servers.
The hospital was also keen to have improved control and monitoring, as part of its wider energy efficiency drive. The new system comprises two vertical air handling units (AHUs) equipped with EC fans, chilled water cooling coils and a fresh air mixing box. The model ADV-B 3512-4025 AHUs are connected to high efficiency Rhoss variable speed chillers, model TCAIY 150, based on scroll compressors The chiller-AHU combination provides 46.5kW of cooling capacity, which is augmented by fresh air cooling when ambient temperatures permit. An intelligent
lima-Therm has delivered a high efficiency cooling solution that uses fresh air to augment
control system maintains temperatures at the pre-set limit, and optimises efficiency by introducing cool fresh air.
It enables up to 15 per cent ambient fresh air to be introduced into the AHU airstream, reducing the load on the chillers and cutting demand for mechanical cooling.
Significant savings
Variable speed scroll chillers also cut running costs due to their high part-load efficiency. As the chiller is operating at part- load most of the time, this can result in significant savings.
In combination, the fresh air cooling and variable speed scroll chillers can deliver savings of up to 30 per cent in energy running costs compared with a conventional DX CRAC system.
Space restrictions on site meant that the new vertical AHUs had to match the size of the original CRAC units, in order to allow for maintenance and inclusion of the fresh air inlet.
Jerry Henderson, Estates Project Officer at the hospital, said: “The dual approach, using fresh air cooling plus variable speed chillers, gives a double win in terms of reducing energy running costs. And because the design is based on proven technology, it is not only highly efficient but very reliable.”
www.klima-therm.co.uk
Thorn provides all the toppings for Papa John’s lighting upgrade
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horn Lighting has provided an energy efficient LED lighting upgrade for restaurant franchise Papa John's new Milton Keynes HQ. In addition to offices, the facility houses a £5m dough plant and quality control centre, supplying over 400 outlets.
Thorn’s brief was to achieve the upgrade to energy efficient, low maintenance LED lighting whilst improving illumination with the required maintained illuminance and 80% uniformity.
The target was to provide a building lighting efficiency of not be less than 60 luminaire lumens/circuit watt and provide various lux levels for different areas. Automatic detection with a daylight link facility has also been provided where natural daylight is available.
The Milton Keynes facility, which covers nearly 50,000sq ft, has undergone a £2.1million refurbishment which included a new reception and atrium,
internal finishes, lighting, ceilings, carpets, partitioning, electrical installation, air conditioning, ventilation, toilets and external areas. Thorn worked closely with Halligan Associates, Birmingham, and came up with a design that included 600 x 600 Omega PRO LED recessed luminaires and Chalice LED recessed downlights to provide 450 lux throughout the office areas. Other Thorn products used in Papa John’s upgrade include Glacier LED, modern and efficient decorative LED pendant luminaire with high lumen packages, in the Reception area and Surface Aquaforce IP65 rated LED luminaires in the dough room to provide the required 500 lux via low energy lighting in this damp, dusty environment. Thorn luminaires have been used throughout the building and additionally installed in the board room, meeting rooms, plant rooms, server room’s staircases, kitchens and toilets.
www.thornlighting.co.uk VISIT OUR WEBSITE:
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arrangements at Malvern Hills Caravan Club after the site’s old, traditional system could not cater for campers on 210 pitches. The decision was taken to install four Rinnai HDC1500i gas fired continuous flow heaters to provide a never- ending supply of temperature-safe hot water for even the busiest of times. The site now benefits from energy and cost savings.
Metsec provides framing solution for Unite development When student
accommodation provider Unite
announced plans for its latest development in Coventry, the curved, complex shape of the building – as well as the confined location, meant that the project would require a bespoke solution. Light gauge structural steel specialist voestalpine Metsec was chosen to deliver its Metframe system to meet the building’s design and performance
requirements. Off-site manufacture of the panels was crucial in helping to streamline the build and reduce activity on the busy, restricted site.
New lighting improves learning environment Chalmor provided new
suspended ceilings, LED lighting and automatic lighting controls for Danesholme Junior Academy, part of the Greenwood Dale Foundation Trust. The old lighting was dingy with unsightly surface wiring systems. Budgets to improve the learning environment were invested in new LED lighting, with
replacement suspended ceilings to brighten up the site. Chalmor safely disposed of the
fluorescent lamps and the old lighting equipment which resulted in 1.1 tons of metal being recycled.
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