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BUILDING CONTROLS


A challenge - but the guidance is out there


By Ian Ellis President of the Building Controls Industry Association


INSTALLATION NEWS


Delmatic transforms


Bosworth House


Delmatic has supplied a lighting control system that includes emergency testing and monitoring for Bosworth House, part of De Montfort University in Leicester. Throughout the building, a key criteria for the lighting was that it should be energy efficient whilst providing a comfortable and pleasant working environment for students and staff alike.


This is a £4.5m project that includes


stripping out, refurbishing and extending the 1970s-built Bosworth House, which lies to the north of the university’s city centre campus and transforming it into a new, state of the art teaching facility. A new eight storey tower has been constructed and the existing tower block and low rise building has been completely renovated and will be used to accommodate the new classrooms and lecture theatres. The design, by JS&P Architecture, will create a new focal point for Leicester’s inner ring road thanks to the inclusion of a decorated glazing system that incorporates a large tree pattern.


Design solution


Delmatic worked closely with JS&P to deliver a good design solution based on their experience within the education market, which would meet the needs of each space. Corridor lighting is controlled on a circuit basis whilst the luminaires in classrooms and offices are equipped with DALI addressable dimming ballasts. Presence detection has also been included in the classrooms and offices via multi- sensors to allow the switching on and off of


the luminaries, whether or not someone is in the room. The system also provides daylight linking so that illumination can be reduced in those areas when sufficient natural daylight is available.


The lecture theatre benefits from a Delmatic Metro Scene Set Panel which provides control of programmed lighting scenes, whilst allowing illumination levels to be raised or lowered to suit the function of the room. The system also provides users with the ability to programme differing light levels for the purposes of security, maintenance, cleaning and normal occupancy modes. Delmatic has provided a versatile system that can easily be reconfigured to suit the user. The lights turn off when not in use, providing substantial energy savings and longer lamp life is achieved due to the shorter burning times which, in turn, reduces maintenance costs and adds to the financial savings.


Heating the hub T


he big challenge for building designers and operators is to meet the demands of today's legislation on energy in buildings while ensuring occupant comfort. It is possible to achieve a balance by using controls


and building energy management systems (BEMS) sensibly, and in fact the current legislation and guidance can be a help, rather than a hindrance. For example, Part L of the Building Regulations is very clear on the need for controls: "Fixed building services (shall) be energy efficient and controlled effectively". Alongside this there is the all-important requirement to demonstrate full commissioning of the control systems and the building services they regulate. This column has addressed the need for commissioning and continuous commissioning several times. If a BEMS is not set up to run correctly at the start of its life, it is unlikely that occupants will see the benefits of that system either in terms of their comfort or in reduced energy bills. Unfortunately, commissioning is not currently covered in an in-depth technical way in the Building Regulations. But Part L does set out rules for giving end-users information on the operation of the controls and their building. Anyone looking for guidance on how this can be done will find excellent advice in the CIBSE publication on Building Log Books. Perhaps one of the most challenging aspects of any new-build or refurbishment project is to ensure good specification. For a BEMS, procurement is very important because it is the stage at which the aims of the building owner or operator can be clearly expressed. If the main aim is to create a highly energy efficient building, then setting this out at the procurement stage is vital. Again, guidance on this is available through an existing standard: BS EN 15232. Not only does this document provide figures on what energy savings can be expected from different generic types of control, it can also be used as a tool to enable clear procurement. By establishing what standard of BEMS is required (A to C) it is possible to identify what controls and control strategies should be employed in a building. Although the current legislation on energy use in buildings can seem intimidating, it does in fact offer a pathway to better procurement and use of controls for energy efficiency in the long-term. By complying with legislation and following guidance currently available it is possible to take a sensible route to design, installation and commissioning of a BEMS that can drive energy efficiency.


10 BUILDING SERVICES & ENVIRONMENTAL ENGINEER OCTOBER 2011


MHS Radiators has supplied 25 Carat contemporary flat panel radiators to The Hub, Edinburgh’s Festival Centre on the Royal Mile. The installation was part of the complete refurbishment of the heating system in the 19th century Grade A listed building. The Carat radiators were specified by Arup consulting engineers and installed by Paisley- based Taylor & Fraser Ltd, which has a long established and excellent reputation for working on historic buildings. The Carat’s flat panel design is


suitable for a variety of interiors - from houses and apartments to public sector buildings such as offices, schools or libraries. It has a strong geometric form which complements efficient and uncluttered environments, and provides an impressive heat output. There are six heights and seven widths in the Carat range, giving maximum scope for positioning the


radiator in keeping with the room’s overall décor. Single, double and triple radiator versions are available with lengths from 405 to 3005mm and heights from 250 to 950mm, giving a versatility not usually associated with minimalist radiators in this price bracket. Carat radiators also have six pipe connections (including two downward facing) which can utilise the fully featured Variocon valve and integral TRV arrangement. They also feature integrated top grilles and welded side panels on the doubles and renewable friendly triples giving ease of cleaning and an overall streamlined appearance.


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