Brighouse, West Yorkshire -- (SBWIRE) -- 02/05/2010 -- Halifax Fan Ltd (http://www.halifax-fan.co.uk) with its long experience of serving the requirements of the power generation industry, has recently supplied a batch of 12 fans from their new Flexible Bespoke range which, drawing on manufacturing and scheduling techniques developed in the automotive industry, enabled Halifax to meet their client's exact specification, but on a very tight delivery schedule from their Shenzhen factory.

Baltec Inlet & Exhaust Systems ordered the fans for a major power generation project in Thailand. Baltec IES is an Australian owned and operated company providing a wide range of services to the gas turbine power industry and offers a variety of products such as gas turbine inlet filtration systems (filter houses),inlet cooling or fogging systems and complete exhaust systems with diverter dampers.

Although not previously having dealt with Halifax Fan, Baltec selected them from a vendor list supplied by their client, Hyundai Engineering Co., for this latest project.

The fans, rated up to 11kW, with narrow impellers complete with 12 full and 12 half backward inclined blades which boost the pressure while maintaining high efficiency, will be used to provide a 'seal air' system for Baltec's diverter dampers which in turn are used to control the flow of high temperature exhaust gas from a gas turbine.

Using the diverter damper, gas flow can be split in any proportion between the heat recovery steam generator (HRSG) downstream of the diverter and a waste heat bypass. The diverter consists of a flanged and braced plenum chamber which is internally lined with stainless steel and insulated with ceramic fiber. This ensures, for safety and reliability reasons, that the equipment has an exterior temperature typically less than 50°C, even with exhaust gas temperatures in excess of 600°C.

Contained within the plenum, an insulated blade assembly contains two rows of seals around its perimeter; one to provide a seal on the HRSG side and the other to provide a seal on the bypass side.

The electrically-driven blade assembly pivots from the top in a 90-degree arc, providing any amount of opening from closed to fully diverted to the steam generator.

The seal air system operates in both the fully closed and fully open positions and supplies air, through inter-connecting pipe-work, to the inter-space between the two rows of seals at a pressure above that existing within the plenum, usually at least 250Pa above the plenum pressure. This ensures that any gas Baltec gas-turbine exhaust and heat recovery systemleakage is into the plenum, not out of it, providing 100% isolation of the gas turbine exhaust gases. The differential pressure is measured by pressure transmitters and monitored by a PLC control system.

Halifax Fan's Shenzhen factory completed the order for the 12 Brighouse designed Flexible Bespoke fan assemblies to Baltec's specification and on-time in only 8 weeks from receipt of order. Phil Dart, Senior Project Manager of Baltec remarked.

"It was a pleasure dealing with everyone at Halifax Fan. Response to any query, technical or commercial, has always been prompt and comprehensive. We're now looking forward to a long relationship between our two companies".

About Halifax Fan,
Established in 1965 to serve local industry, Halifax Fan Limited now supplies most industries throughout the world from its manufacturing site at Brookfoot, Brighouse.

Contact:
Malcolm Staff – Halifax Fan, Managing Director

Address:-
UK : Halifax Fan Limited, Mistral Works, Unit 11, Brookfoot Business Park, Elland Road, Brighouse, West Yorkshire. United Kingdom, HD6 2SD
Phone: U.K +44 1484 475123
CHINA: Halifax Fan (Shenzhen) Co Ltd. 1 and 2f, No.4 Building, Creative Industrial Park,. Shang Xia Wei, ShaJing, ShenZhen, GuangDong Province.
Phone: China +86 755 81490059
Email: sales@halifax-fan.co.uk
Web: http://www.halifax-fan.co.uk
Email: malcolm@halifax-fan.co.uk

Press release circulated by BMS Marketing Services Ltd. http://www.bmsmarketingltd.co.uk.

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm

Industrial Centrifugal Fan Manufacturer Halifax Fan Ltd Employs Fine Element Analysis for Long Term Reliability, Greater Efficiency and Competitive Costs.

Brighouse, West Yorkshire -- (SBWIRE) -- 09/25/2009 -- The Finite Element Method, more commonly known today as FEA, was originally developed in the 1940s by pioneers such as Richard Courant and is a mathematical tool for examining the elasticity and strength of complex structures by mathematically breaking the structure or domain down into a mesh of discrete sub-domains or elements.

However, only with the evolution of the computer, has FEA today become a cost-effective tool for studying fabrication designs in great detail. Halifax Fan's FEA software interfaces with their CAD system and simplifies anad speeds the creation of the mesh structure to be analysed. FEA greatly improves the application of stress analysis and, using graphical methods, quickly and clearly, shows on the computer screen, areas of high stress to pinpoint where a different or thicker material might be needed to meet the specified operating conditions.

Finite Element Analysis (FEA) enables Halifax's fan designers to assess not only the rotating elements of the fans but also the stresses on high pressure and explosion-proof fan20casings and the motor and bearing pedestals. Vibration analysis and the identification of natural resonant frequencies can also be analysed and thus catered for the most common use of FEA at Halifax Fan is to examine the stresses on fan impellers, especially for more critical models such as high speed fans and those subject to high cyclic stress and temperatures.

In the case of high pressure and explosion-proof fans, FEA also facilitates a detailed stress analysis of the fan casings and their explosion containment capabilities. Case deflection studies ensure that when working with mechanical seals there is minimal case movement ensuring pressure integrity.

Recently, where high efficiency, variable speed operation is required, FEA has been invaluable for calculating the natural frequencies of the bearings and motor pedestals to help with the avoidance of potentially damaging mechanical resonance FEA can also be used to examine the natural frequency on the bearing and motor pedestal.

About Halifax Fan:-
Yorkshire based Halifax Fan Ltd is rightly regarded as one of the world's foremost manufacturers of industrial centrifugal fans.

For more information please contact:

Malcolm Staff – Managing Director
Halifax Fan Limited,
Mistral Works,
Unit 11,
Brookfoot Business Park,
Elland Ro ad,
Brighouse
West Yorkshire
United Kingdom
HD6 2SD

Tel: U.K +44 1484 475123
Tel: China +86 755 81490059

Email: sales@halifax-fan.co.uk
Website: http://www.halifax-fan.co.uk

Press release circulated by BMS Marketing Services Ltd http://www.bmsmarketingltd.co.uk.
Tel: 0044 (0) 1274 878770.

For more information on this press release visit: http://www.releasewire.com/press-releases/release-3.htm