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Understanding the Peltier Effect

The Peltier Effect and Thermoelectric Units The Peltier effect, or Thermoelectric effect, is the name given to the occurrence of heat when an electric current passes across a junction between two conductors. Thermoelectric units are designed to exploit this phenomenon. They are small static heat pumps which operate according to the principles of the Peltier effect, discovered by the French physicist Jean-Charles Peltier more than a century ago. The basic principles of thermodynamics can be applied to these devices just as is done with tradi...


Fans for Spray Booth Extracts

Manufacturers of spray booths need to ensure that they have effective ventilation for two main reasons; to protect spray booth operators by extracting paint fumes and to ensure the best paint finish possible by removing excess particles of the paint spray. During the spray process, paint particles are released into the atmosphere through the spray nozzle which increases the release of potentially hazardous vapours and paint particles. Professional spray paints and lacquers often contain volatile organic compounds which are emitted as gases. ...


ATEX Fume Extraction for Landfill Organic Waste

Landfill gas is a natural byproduct of the decomposition of organic materials which are put into landfill. The gas is composed of roughly 50% methane (CH4) and 50% carbon dioxide (CO2) and a small amount of non-methane organic compounds. Methane is a potent greenhouse gas and is harmful to the environment. When organic waste is first deposited into landfill, it goes through the initial stages of decomposition where small amounts of methane are generated. As the conditions change during the subsequent stages of decomposition, an increase ...


A Sweet Outcome: Stainless Steel ATEX Fan Case Study

Axair were recently tasked with finding an air movement solution for a major producer of throat and cough sweets. The customer, with a site based in the centre of a rural town, employs more than 200 people and was established over 200 years ago. The Problem A review of the company’s manufacturing processes revealed that the method of producing throat lozenges, using a powered starch mold process, has the potential to cause an explosion. Starch powder, like many food based powders used in the food processing industry, has the potentia...


6 Advantages of Multiple Fans in a Fan Grid / Fan Wall

Multiple fans in parallel vs. a single fan in ventilation systems In many cases, it is advantageous to use more than one fan running in parallel on a fan grid (or fan wall) in a ventilation system to achieve the benefits discussed below. 1. Efficiency Typically 40% of a commercial buildings energy use comes from heating, ventilating and cooling with 50% of the HVAC energy consumption coming from fans. Given the increasing cause for environmental concern, designers should look to select EC plug fans which will not only provide the necessary r...


Ecofit Ewheel – New EC Backward Curved Centrifugal Fan

Designed for low to medium pressure applications, Axair Fans are excited to launch the latest addition to our impressive range of backward curved centrifugal fans with the Ecofit EWheel. Developed and manufactured by supplier partner, Ecofit, the 250 diameter EC Ecofit EWheel supersedes the previous version in both aesthetic design and performance. Over the past few years, the importance of developing and producing energy efficient components and finished product has been a huge focus, particularly in the industrial market. Having develop...


Why Refurbish AHU’s with EC Plug Fans

Old buildings can often feature outdated and deteriorating ventilation systems. The first opinion may be to replace the entire air handling unit, but often refurbishing the components within the system can prove beneficial beyond financial gain. This week we look at the advantages of AHU refurbishment over replacing the entire system. One major problem in favour of refurbishment is that of the existing system. Ductwork and max air volume delivery are often governed by the existing ventilation system, so the new one must comply with these sp...


Industrial Fans for Dust & Solid Transportation

Industrial and manufacturing processes and procedures can often produce hazardous and combustible airborne particles such as dust. This particulate must be extracted out of the working environment in order to protect other processes and any susceptible personnel. Axair, in partnership with Casals Ventilation, can supply a range of fans that can be utilised in local extract or multi-point ducted systems to remove these particles safely and efficiently. Material handling fans are required where dust, solid and bulky materials need to be handle...


Noise Optimised Units for Fan Coil Units

Vibration induced noise can be a major problem in fan coil installations. It originates within the motorised impeller unit and cannot be entirely eliminated until new technology invents an induction motor that is free of electromagnetic vibration and an impeller that is perfectly balanced. Ecofit believe they have gone a long way towards solving the problem by introducing double inlet centrifugal fans that incorporate anti-vibration mountings between the fixed shaft and the scroll mounting arms. The fans, prefixed ‘GDS’, therefore achiev...


Effective Redundancy by Running Fans in Parallel

The air handling unit market is under constant pressure from all sides; pressure from the end user to improve indoor air quality, pressure from architects to provide more comfort and to produce more aesthetically pleasing units but also from energy consultants who demand manufacturers to deliver energy efficient units with higher airflow performance and pressures at lower installation and operating costs. Commercial heating and ventilating represent a major proportion of any construction budget, frequently comprising ten percent or more of t...