FORTHCOMING EVENTS:
We regularly attend trade shows and environmental events - any forthcoming events will appear below - we look forward to meeting you there
ECOBUILD EXHIBITION
London, Earls Court
Stand 2103
2nd-4th March 2010
BEST PRACTICE LOW CARBON INNOVATION FORUM
National Motorcycle Museum
10th March 2010
NEMEX 2010
part of Sustainability Live
NEC Birmingham
20-22 April, 2010
Stand N29
Low Carbon Best Practice Exchange
10 June 2010
Olympia Conference Centre, London
THE ENERGY EVENT 2010
National Motorcycle Museum - Stand 54
8th-9th September 2010
ENERGY SOLUTIONS EXPO
London, Olympia
Stand F80
6th-7th October2010
Alan Beresford
MANAGING DIRECTOR OF ECOCOOLING
is on the CIBSE steering committee for the design of data centre Cooling
How Evaporative Cooling Works
Principle of Evaporative
Cooling
Cooling is provide by Evaporative heat exchange which takes advantage of the principles of the latent heat of evaporation where tremendous heat is exchanged when water evaporates. It makes use of the free latent energy in the atmosphere. Compared to air-conditioning which uses mechanical refrigeration, the operating cost of heat evaporative exchanging are 90% less than air conditioning.
Water is brought into the cooler from the mains water supply and is pumped up to the top of the unit using a circulation pump. The water is then dispersed over the Celdek pads using a water distribution system which allows the water to flow continually over the pad.
The pads become saturated, air is drawn through the pads and the water evaporates causing the air to cool. The cool air is then ducted round the building to provide cooling by means of an axial fan.
The hotter the outside temperature and the lower the humidity, the greater will be the cooling effect.
(see graph) On the hottest day in the UK up to 15°C of cooling can be achieved through this process. The air off temperature of an EcoCooler in the UK is always below 23°C, thus providing excellent comfort cooling for most building requirements.
Services Requirement
An evaporative cooler requires mains water
and 240v electricity supply.
With an evaporative cooler you are basically turning a hot summer day into an April day. If the building does not suffer from a humidity problem in April it will not in the summer. Humidistats can be fitted if humidity is critical
For more details on humidity please
click here
When to use
Evaporative
Cooling
Ventilation systems can provide comfort cooling for most of the year. During prolonged periods of high temperatures they are unable to maintain internal temperatures below 25°C. It is at this point that evaporative cooling is brought in. Using Evaporative cooling as an integral part of a balanced ventilation system means that the temperature of a building can be controlled even on the very hottest days.
Why is it cheaper
than
Air Conditioning?
The economics of using evaporative cooling are surprising to most people. An 85% reduction in energy used compared to a conventional air conditioning unit seems too good to be true. This is achieved because in the UK it is cold most of the time! Why do we need to run an air conditioning system when there is an ambient temperature of 10C ? In a modern, well insulated and air tight building with even a light occupancy the air conditioning is running almost continuously. By simply bringing in ambient air this will keep a building cool most of the year. By using a control system to minimise energy usage of fans coupled with evaporative cooling, relatively low flow rates of air are required. The only significant energy use is in the fan for the air movement. Typically a 1KW evaporative cooling system can manage a 20KW load in the UK
