Metal and textile perforated air ducts. ONEAIR SRL - All rights reserved. Unauthorized reproduction is forbidden.

Transcription

1 Metal and textile perforated air ducts ONEAIR SRL - All rights reserved. Unauthorized reproduction is forbidden.

2 OneAir Who we are OneAir Srl is a relative young company composed by a team of long experienced people in the field of ventilation and air condition and specifically skilled on the realisation of the perforated air ducts. The composed experiences inside OneAir Srl has allowed to develop immediately products based on high level technology with use of laser perforation and laser cut according the different materials at the base of the realization of its own products The deep knowledge in the textile realization has also brought the company to develop a specific technological branch inside the Company for the develop and realization of products for the transport sectors.

3 OneAir Products PERFORATED AIR DIFFUSERS - DHI Textile air ducts DHI Metal air ducts

4 OneAir DHI Textile Air Ducts The DHI TEXTILE AIR DUCTS are realized on Different types of fabric Standard Euroclass B,S1-d0 Euroclass A1 Several colours (8 different standard colours) Several shapes (circular, semi-circular, quarter circle) Large range of diameters (from 200 to mm) Different types of installations options Cable (single or double) Rails (single, double, suspended, at ceiling)

5 OneAir DHI Metal Air Ducts The DHI METAL AIR DUCT are realized on galvanized steel (8/10 or 10/10) on different Finishing (galvanized, pre-painted, painted) Shape (circular, demi-circular, quarter circle) Type of installation There are then available specific lines of product on Stainless steel Copper

6 OneAir DHI Metal Air Ducts The DHI Metal Ducts are produced in two different configurations Open circumference Closed circumference The first configuration (open circumference) has been designed for reducing the cost of transport of the ducts, and a simple system for closing the ducts allows to have an economic advantage without any efficiency lost.

7 The air distribution Perforated air ducts vs. Traditional systems

8 OneAir HIGH INDUCTION The principle used for the realization of the DHI Perforated Air Ducts it s based on the High Induction phenomenon Using a calibrated air speed, the air which exits from the perforation produces low-pressure areas, and these activate the mixing between the incoming air (primary air) and the existing air (room air), producing as result the movement of an air quantity bigger than 40 times than the primary air.

9 TRADITIONAL SYSTEMS DIFFUSION WITH CEILING DIFFUSERS With the most used diffusers, installed on ceiling, the air distribution and the level of comfort is influenced by the number of the installed diffusers and by the positioning of the exhaust lines. In this situation the level of comfort (defined with the rule UNI 10339) is exposed to problems for the homogeneity of the temperatures and the presence of air currents and furthermore the energy consumption is influenced by a presence of air stratification phenomenon (especially during the winter season heating functioning) and the time needed to reach a good working point of the air conditioning system ONEAIR SRL - All rights reserved. Unauthorized reproduction is forbidden.

10 OneAir DIFFUSION WITH CEILING DIFFUSERS Also if the ceiling diffusers are the nearest diffusers for reaching the optimal air diffusion in the rooms, these maintain some specific problems during the both functioning settings (heating and cooling) During the Cooling (summer season) the possibility to activate the high induction effect is strictly connected to the Coanda effect (also named ceiling effect ) which allows to the primary air to stay to the ceiling level avoiding to enter quickly in the occupation zone. In presence of wall or parts of the room exposed at the sun (e.g. for the presence of windows) this will influence the behavior of the primary air, which goes upwards. In this situation the primary air doesn t reach the wall sunny exposed and this bring to concentrate the air jet on the wall opposed and it is important that the air that reach this side of the room doesn t enter quickly in the occupancy zone (very difficult to regulate because the change of the temperature depends on the sun irradiation)

11 OneAir DIFFUSION WITH CEILING DIFFUSERS During the Heating (winter season) we will have the same conditions but with a situation of air stratification, that means different vertical temperatures inside the room.. This brings to have air currents inside the occupancy zone and a situation of discomfort for the people present inside the room.

12 OneAir DIFFUSION PERFORATED DIFFUSERS The perforated air ducts allow to maximize the high induction effect. This depends on the possibility to use the entire surface of the duct for diffusing the air inside the room. Through the high induction the whole air quantity present inside the room (primary air and existing air) has moved and this movement mixes these two components of the room air permitting to reach the temperature homogeneity and an high level of comfort through the control of the air speed in the occupancy area. The primary air in the perforated air diffuser is composed by several micro air jets and this allow to reach the comfort level because the air is not concentrate in few specific points but it's diffused on the entire room Heating Cooling

13 LIDL Application 1 Our solutions for LIDL FRANCE ONEAIR SRL - All rights reserved. Unauthorized reproduction is forbidden.

14 OneAir LIDL APPLICATION Starting from the standard configuration defined by LIDL, see the two pictures beside, we have shown how the use of the perforated air ducts can improve the level of comfort compared with the ceiling diffusers. According this it has been selected a configuration as that indicated in the second pictures The system for air diffusion inside the shops has been configurated dividing the primary air on 6 lines of diffusers, with diameter 550 mm and length in the range of mt, positioned with a paralel orientation to the angle of inclination of the roof of the shop. The perforated diffusers have been positioned inside the shop considering the products layout. Indeed for the open fridge expositors the presence of air diffuser above those has been avoided.

15 OneAir LIDL APPLICATION According the technical data of the AHU used and the space configuration, ONEAIR through its CFD Software (Computational Fluid Dynamics) and its experience has developed the configuration of the perforation to apply on the metal air diffusers. Here some detail of the technical specifications released by the CFD. The metal diffusers are painted with the selected colours (RAL 9010 for the diffusers and RAL 7024 for the air transport line)

16 OneAir LIDL APPLICATION The following graphs represent the air behaviour during the Cooling and Heating The details of the analysis it s also able to show also the speed of the air inside the duct ONEAIR SRL - All rights reserved. Unauthorized reproduction is forbidden.

17 OneAir LIDL APPLICATION Perforated air duct Elbow 45 for the adapting the positioning of the duct to the ceiling inclination Air transport line (not perforated air ducts with diameter reduction) ONEAIR SRL - All rights reserved. Unauthorized reproduction is forbidden.

18 OneAir LIDL APPLICATION List of some of the projects LIDL FRANCE with ONEAIR products Yvetot, Cherbourg, Valognes, Coutances, Harfleur, Mehun, Ecouis ONEAIR SRL - All rights reserved. Unauthorized reproduction is forbidden.

19 OneAir Srl Via Pacinotti Caselle di Sommacampagna (Verona) Italy