Buildings|   Industry

Twin Wheel® System

Maximized climate control with minimized energy costs

Related documents  

 
 

Energy efficient humidity control

The integrated system utilizes Fläkt Woods unique Twin-Wheel® AHU low-energy technology and high efficiency free-cooling chillers, combined with a precisely matched selection of chilled beams and an option of individual room monitoring of temperature and humidity.

Integrated advantages
Fläkt Woods has designed the Twin Wheel® system to provide advanced cooling and humidity control versus other solutions on the market. The purpose is to produce cool and dry air while lowering the cost for these processes compared to conventional systems.

At the heart of the system lies advanced hygroscopic wheel technology, perfectly matched to the low humidity requirements of the chilled beams, eliminating the risk of condensation whilst achieving class-leading levels of energy recovery.


Maximised climate control with minimised energy costs

Air quality
Today we demand a comfortable environment when inside a building. One important parameter for a good indoor environment is the air quality. Good indoor air quality in turn is a combination of factors like oxygen level, humidity, absence of odor and pollution - and obviously the right temperature.

Energy costs
Cooling and heating processes typically demand high levels of energy supply. In modern buildings air treatment is often the biggest consumer of power. This fact together with constantly increasing global energy prices, call for systems optimized for best overall efficinecy. At Fläkt Woods we combine our experience with advanced technology to achieve intelligent system solutions. They are sound investments providing a short payback and dramatic savings in the long run.

Environment
The environment is also a winner with our solutions. For nature, regardless of energy source, the least harmful kilowatt of energy is the one saved and never produced.

Controlled humidity
Control over the humidity content of the air is one factor to reach good indoor air quality. Humidity control is also essential for use of chilled beams, an air cooling technique with good efficiency and high levels of comfort.


 
 

Akropolis shopping center, Kaunas, Lithuania
Kaunas AKROPOLIS will be the biggest shopping centre in Kaunas and in central Lithuania, with a wide selection of national and international stores. The AKROPOLIS shopping centre in central Lithuania will attract customers from all over Lithuania and neighbouring countries.
The Akropolis shopping centre in Kaunas, Lithuania includes an ice rink. To avoid fog in the area around the rink it is necessary to supply air at a temperature of 16°C and an absolute humidity of 8 g/kg. The outdoor design condition is 27°C and 55% relative humidity (12.3 g/kg).
Two EU air handling units each equipped with two rotary heat exchangers supply a total of 15.4 m3/s. The total cooling demand is 448 kW and the reheat demand is 53 kW. By means of the twin rotor system the cooling demand on the chiller is reduced by one third to 300kW and the reheat demand is eliminated. Not only is the running cost reduced but also the size of the chiller plant.

Greenwich Peninsula, London, England
As part of what is believed to be one of the largest chilled beam contracts in the London area, Fläkt Woods has supplied the complete £1.25 million ventilation solution for the Peninsula Central office development, part of the Terry Farrell’s Greenwich Peninsula master plan in London. In addition to Fläkt Woods supplying over 2,300 active chilled beams, they are also providing air-handling units, VAV boxes and displacement terminals.

At 196,000sq ft the first of two developments 14 Pier Walk was opened in June 2009 and will form one of 3 new head offi ce hubs for Transport for London. TFL have taken a 20 year lease on the building with the fi rst of 1800 staff already at work at the-state-of-the-art green office. The second building Mitre Passage comprising115,000 sq ft will be ready for occupation at the end of 2009.
The new twin wheel technology is expected to reduce energy costs on summer cooling.

Further references
Unilever, Kingston, UK
Manchester Metropolitan University, UK
Fitzrovia, London, UK
M W Kellog, London, UK
227 Tottenham Court Road, London, UK
Bidborough House, London, UK
John Dalton Building, Manchester, UK