Where there are uniforms there are burrsThe rally was of short duration for the rugbySpecial dishes and a menu is planned from 25Behind meat and fish suffer no criticismIssue of ease of use with the customer andEverybody knows the history of online brokersIt will take years and will leave deep trace said Anton BrenderThis British example is currently snowballInside plants are not homework on volumesConsumption in this country has fallen by 6If it is a polar Cold this winter, this should not obscure that meteorological experts predict a resurgence of the scorching summers in connection with climate change. However, the use of air conditioning is often denounced as a source of additional energy, not to mention the refrigerants which leaks frequent contribute to the greenhouse effect. Hence the interest of the techniques that avoid the use of these fluids and minimize energy use, as is the case that developed by the French company Delta Neu.
Based on the principle of cooling by evaporation known since antiquity with porous pottery which evaporation of surface refreshes the content, the Delta Neu cooling method is "green" insofar as it is consumer of natural resources (water, electricity). The hot air to the outside, through a medium of type nid-d'abeilles, made wet by a water runoff. This causes evaporation decreases in the order of 10 degrees, the temperature of the air coming in the building "the quantities of water and energy required for this system are low, says Jean-François Merle, Director of marketing and development of Delta Neu." Cool 10,000 m3 of air per hour, to about 40 litres of water per hour and in terms of the energy 1.5 kWh. On the basis of 0.002 euro per litre of water and 0.033 euro, per kWh, the cost of cooling of a room of 1,000 m2 that it wants to pass 35 to 28 degrees is 0.13 euro now. "This represents a savings of more than 70 the cost of operating a traditional air conditioning", he concludes.
Low initial investment
Little consumer resource, this cooling requires in addition, as a low initial investment. Elsewhere this asset, is more, it said, that sustainable development concerns, which explain the success of Delta Neu to its customers. "We had studied conventional air conditioning solutions, says Nigel Storr, Director logistics NAF Naf Chevignon, which operates a large warehouse of 2.000 m2 in Epinay-sur-Seine (Seine-Saint-Denis) now equipped with air conditioning Delta Neu." But in view of the characteristics of the building, it would have assumed investment exorbitant hundreds of thousands of euros and high operating costs. "Built in concrete and sheet, in the 1970s, the building offers a poor or even non-existent insulation, a situation compounded by the fact that its doors are held open to the outside. "These past years, in the Paris area, we had several summers particularly hot." "The temperature exceeded 40 C in the upper part of our warehouse", says Nigel Storr. In Naf Naf Chevignon, is aware that such working conditions favor little productivity. "It was really too hard for handling staff to realize pretty physical work," says Nigel Storr. It therefore decides to cool the building. Ecartant solutions of air-conditioning, too costly, Nigel Storr is then talk of another warehouse of the Vivarte Group which owns Naf Naf Chevignon from the Halles to the shoes, whose air conditioning seems to give satisfaction. "It is as we made contact with the company Delta Neu and finally dealt with it", he, concludes with an investment of the order of 150,000 euros.
Ease of adjustment
It is also the effectiveness of the technique for low-cost who convinced the leadership of Vallourec Oil & Gas, at Aulnoye Aymerie plant, in the North, which manufactures metal pipe without welding, to opt for the Delta Neu conditioning. Here the problem was different. It was refreshing both relatively small spaces containing electrical substations with equipment high and low voltage generating high heat. "Previously we used external fans, says Jean-Philippe Desfossez, technician electrical distribution in Vallourec Oil & Gas, but it reached despite all sometimes 40 degrees. In addition to the low cost, the order of 45.000 euros ease of adaptation of air conditioning to the existing ventilation system which has been instrumental in the choice of this system.
Currently, Delta Neu competitors are Spanish and British, and soon they will be also Asian. "The development of this technique has been arrested so far by resorting to the traditional air conditioning which decrease temperature evenly, while evaporative cooling provides instead a bubble of comfort", explains Jean-François Merle. But the current ecological concerns him opens up new perspectives.
