2005 February


Damper actuators

21 February, 2005
Only three types of electronic damper actuator from Siemens’ OpenAir range are needed to cover every normal HVAC application. They are available in types for small, medium and large positioning forces. All incorporate the Siemens cats-eye indication system to provide instant visual conformation of damper position, even if auxiliary switches are fitted. A self-centring system clamps the shaft on all sides, eliminating the risk of slippage.
The expanded Econoflame range of boilers from Stokvis covers heating requirements from 100 to 600 kW. Features include high efficiency and reliability, low noise output and relatively light weight — combined with high construction standards.

Non-trip earth-loop tester

21 February, 2005
Reliable earth-loop measurements in electrical circuits with tripping circuit beakers can be achieved using Martindale’s EZ2100 tester, designed to meet the requirements of the 16th edition of the Wiring Regulations.
§steam traps

Steam traps have extended life

21 February, 2005
One of the UK’s best-selling range of steam traps, Spirax Sarco’s FT ball float series, has been extended with the FTGS14 version having a stainless-steel base for longer life. It has an extended 5-year warranty.
Oil-free centrifugal chillers using R134a and with cooling capacities from 210 to 2400 kW have been launched by Powermaster. TECS chillers are available as both air-cooled and water-cooled units.
close control unit
Airedale has extended its EasiCool range of compact close-control air-conditioning systems with a multi-configured upflow version designed for greater versatility and efficiency.
fabric ventilation
This unusual-looking ventilation system serving the premises of Imagelinx is based on fabric ductwork dyed to blend with the interior of the building. Fabric Air supplied two separate systems, each with an airflow of 3.5 m3/s. The channels have linear slot diffusers to deliver air at low velocity. Each system comprises 710 mm-diameter heads 13 m long, with six 12 m channels 350 mm in diameter feeding from the main duct. The complete system provides year-round cooling, heating and air conditioning to maintain accurate conditions in the space.
Historic Sopwell House Hotel in St Albans has recently refurbished its 42 bedrooms with a Fujitsu VRF air-conditioning system to provide both heating and cooling.
Accurate temperature control for an environmental chamber to train athletes in the challenging conditions they could face elsewhere in the world is provided by a Bitzer cooling system. The facility at Nottingham Trent University was used by several athletes as part of their preparations for the recent Olympic Games in Athens. It can accommodate several athletes training on various ergonometers, while doctors carry out physiological studies. The chamber provides accurate control of temperature, humidity and simulated altitude. Temperatures can range from -20 to +40°C.
Plantation Place
McQuay UK has completed two major R134a-based cooling contracts in London worth over £750 000. The project includes seven Easdale air-handling units.
Jerwood Centre

Koolduct is poetry in ductwork

21 February, 2005
Built to preserve the works of William Wordsworth and his contemporary English poets, the 3-storey Jerwood Collections Centre incorporates the Kingspan KoolDuct system as part of environmental control to protect fragile documents. Built near Dove Cottage at Grasmere in the Lake District, where Wordsworth lived for nine years during his most creative period, this vbisitor centre attracts 75 000 visitors a year.
NUS Consulting
The use of Emerson Network Power air-conditioning systems protects IT equipment in the new office of NUS Consulting at Redhill.
aerial view
Over 120 wall-hung condensing boilers from Broag’s Quinta range will provide heating and hot water for the biggest development of student accommodation in Europe. The £120 million project will provide 2272 beds in 20 buildings. Facilities include a self-contained laundry and social block.
Major reductions in installation time have been achieved using Oventrop’s Cocon 4 control valves on 60 fan-coil units providing air conditioning for a distribution and office building on Kitescroft Business Park in Fareham. They were installed by Encon Special Projects.
EWS residential engineers play a key role at the energy-efficient campus of Cable & Wireless at Bracknell by supplying HVAC service and maintenance expertise.
Carbon Trust
The potential to reduce the electricity consumption of the offices of the Carbon Trust in London by 25% has been provided by the installation of an automatic lighting-control system. Carbon Trust is the company set up by the Government to help the UK meet its climate-change obligations.
Sainsbury’s has reduced its refrigeration energy use by 15%, amounting to over £4 million a year, across 456 of its stores. The savings have been obtained by using Parasense energy-monitoring, optimisation and exception equipment. The savings represent 5% of Sainsbury’s total energy use.
Total power failures in a Wetherspoon pub at Wimbledon have been overcome using a solution put together from Sanyo’s GHP gas-power range of VRF equipment.
The ability of computer science to learn from experience and anticipate events can be put to good use in building-management systems, says JAMES PALMER.
roof terminations

Putting lightpipes to the test

21 February, 2005
Lightpipes that bring daylight into the heart of a building are an effective way to use renewable energy. Their efficiency has increased to over 50%, and moves are afoot to combine lightpipes with PV energy to provide lighting day and night, as TERRY PAYNE explains.

New boilers for old radiators

21 February, 2005
Condensing boilers can be installed into existing heating systems without having to change the radiators. PETER GAMMON explains how.
buffer store
The ability of heat pumps to extract renewable energy from the ground continuously for relatively little energy input gives them a key role to play in the future of space heating. STEWART PURCHASE explains.
AC unit
Air conditioning can be provided more efficiently simply by designing it not to remove so much water vapour from the air — as PHILLIP ORD explains
David Pepper
DAVID PEPPER examines the issues solved by considering direct-gas-fired water heaters.
Eden Project
Customised air conditioning can be an insurance policy worth taking out says ROGER PALAMARCZUK
St Pancras

Partners in open systems

21 February, 2005
Not only do the communications protocols BACnet and EIB provide the potential for linking controls and sensors from different manufacturers, but thay can also communicate openly with each other. CHRIS GLASOW has the details.
With the higher temperatures associated with climate change, the traditional approach of using outside air for cooling buildings cannot be relied on. DR JALE HAKER and PROF MICHAEL HOLMES consider how buildings can be adapted.
Donald Leeper
The benefits of partnering come more from relationships than from business processes argues DONALD LEEPER.

Tank-in-tank calorifiers

21 February, 2005
A range of six calorifiers from MHS Boilers starts with a 60 litre unit with a high-performance output of 290 l/h and goes up to a 500 litre model with a capacity of 1475 l/h at 50°C.
Denco’s plans to focus on its core air-conditioning business include moving to new purpose-built factory and office facilities in Hereford and disposing of non-core businesses.

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