Air Diffusers for direct conditioning
Type WDA/WDB
LTG Aktiengesellschaft D - 70435 Stuttgart, Grenzstraße 7 +49 (0711) 82 01-180, Fax +49 (0711) 82 01-696 Internet: http://www.LTG-AG.de E-Mail: [email protected] LTG Incorporated105 Corporate Drive, Suite E Spartanburg S.C., 29303 USA
+1 (864) 599--6340, Fax +1 (864) 599--6344 Internet: http://www.LTG-INC.net
E-Mail: [email protected]
LTG S.r.l. con socio unico
Via G. Leopardi 10 I--20066 Melzo +39 (02) 9 55 05 35, Fax +39 (02) 9 55 08 28 Internet: http://www.LTG-SRL.com E-Mail:[email protected] WDA/WDB-E-TP-01 (09/00) 451-33
ELTG Aktiengesellschaft⋅Grenzstraße 7⋅D-70435 Stuttgart⋅+49 (0711) 8201-180⋅Fax -696
Internet: http://www.LTG-AG.de⋅E-Mail: [email protected]⋅Printed in Germany⋅Ausgaben mit früherem
Datum werden hiermit ungültig⋅Technische Änderungen vorbehalten⋅Former editions are invalid⋅Subject to technical modifications.
Japan
Toho Engineering Co. Ltd.
14-11, Shimizu 3-Chome, Kita Ku Japan 462 Nagoya
(052) 9 91-10 40, Fax (052) 9 14-98 22 E--Mail: [email protected]
Axial--flow, centrifugal and tangential fans
LTG Collector System
Coarse and fine particles filration
Separating and compacting
Compressing and humidifying
The Program for Process Air Technology Components
Engineering services
Technical services for construction engineers and plant designers during develop-ment and operation of assembly groups, machines and plants.
Room Air Technology Germany
Frankfurt · Herborn · Berlin · Chemnitz · Düsseldorf
Europe
Ladendorf/Austria · Epône/France · Wick-ford/Great Britain · Ermelo/Netherlands · Krakow/Poland · Lissabon/Portugal · Ljubljana/Slowenia · Istanbul/Turkey
The Program for Room Air Technology Components
Air diffusers for walls, floors and ceilings · ”LTG System cleanR” · CoandatrolRand CoandaventRair diffu-sers · LTG cool waveRchilling fans · KlimaventRinduction units · RaumluftRfan coil units · Facade fan coil units ·
Airflow control units · labairRsystem
Engineering services
Technical services for investors, archi-tects, engineers and plant builders during design, construction and operation of buildings. Reliable and precise data rela-ting to the ventilation of air conditioning system are given already before realiza-tion of the project, determined by measu-rements, calculations, building simula-tions and experiments.
ELTG Aktiengesellschaft⋅Grenzstraße 7⋅D-70435 Stuttgart⋅+49 (0711) 8201-180⋅Fax -696 WDA/WDB-E-TP (09/00)
Internet: http://www.LTG-AG.de⋅E-Mail: [email protected]⋅Printed in Germany⋅Ausgaben mit früherem
Datum werden hiermit ungültig⋅Technische Änderungen vorbehalten⋅Former editions are invalid⋅Subject to technical modifications. 3
Air Diffusers Type WDA / WDB for direct conditioning
The stretching ability and the tensile strength, of natural fibers in particular, is dependent mostly on the moisture content of the yarn. During the production process the fi-bers are stretched to their limit because of the high proces-sing speed. If the yarn gets too dry, it breaks and these breaks interrupt production and lead to poor product qua-lity. It is therefore best to humidify the yarn directly at the machine, for example such as the warp area on weaving looms.
Systems for this purpose offer the following features: - exact control of humidity
- precisely directed airflow
- reduction of total energy consumption - low maintenance operation
The LTG air diffusers, type WDA and WDB, are equip-ped with adjustable deflectors for fine tuning the dity and accomplish these features within a large humi-dity and air volume range of 300 -- 1000 m3/hxm. Their robust design offers the highest degree of reliability and safety.
Application
LTG Air Diffusers Type WDA and WDB are especially useful for the direct conditioning of the yarn during pro-cessing on the loom. They are also useful in a variety of industries, such as
- knitting and hosiery mills - nonwovens industry - paper industry - cellulose industry
They find their special application in the LTG WeaveDi-rect system.
Advantages
•constant and even temperature and humidity distribution •changing of humidity level possible when changing
material
•optimum dust and heat removal through the air stream from above
•change to the WDA/WDB diffuser makes a larger A/C system unnecessary
Function
The supply air is diverted from the duct into the air diffu-ser by guide vanes.
A perforated grid distributes the air evenly over the entire length of the diffuser.
The specially formed deflectors produce a flat, low--tur-bulence air stream that is induced with room air. The deflectors are adjustable. The induction ratio can be adjusted over the entire row of machines and the humidity distribution can be kept even at the required level. The desired humidity can be obtained by a mixing ratio.
Air Diffusers Type WD..installed into the duct
Shipping
The Air Diffusers Type WDA and WDB are available as individual complete diffusers for installation into an exi-sting duct system.
ELTG Aktiengesellschaft⋅Grenzstraße 7⋅D-70435 Stuttgart⋅+49 (0711) 8201-180⋅Fax -696 WDA/WDB-E-TP (09/00)
Internet: http://www.LTG-AG.de⋅E-Mail: [email protected]⋅Printed in Germany⋅Ausgaben mit früherem
Datum werden hiermit ungültig⋅Technische Änderungen vorbehalten⋅Former editions are invalid⋅Subject to technical modifications. 4
Application Example: The LTG weave di-rect system for weaving mills
During the weaving process, warp yarn is subjected to very high tensile strain. If the yarn is too dry, excessive yarn breaks result, disrupting production and reducing product quality. For cotton and other natural fibers, humi-dity is crucial: the moisture content of the yarn increases the tensile strength and stretching ability of the yarn. For today’s high--efficiency processing it is very difficult to provide the necessary relative humidity through regu-lar room air conditioning. High capital expenditures and energy costs are involved to accomplish this task. The LTG weave direct system delivers the humidity in the correct dosage exactly to the area where it is most needed -- the shedding area of the loom.
The LTG weave direct system consists of a dedicated duct system with special air diffusers, type WDA and WDB that is installed approx. 0.8 -- 2.1 m above the loom. The air is either supplied by the room airwasher, or it is condi-tioned by its own dedicated airwasher. The air diffusers have adjustable deflectors. The relative humidity can be fine--tuned across the whole system and the even humi-dity distribution can be maintained along the entire row of looms at the desired level.
LTG weave direct system, installed directly above the loom
Advantages
•the number of warp stops can be reduced by up to 20% •increase in efficiency (up to 5% has been achieved in
existing installations) •quality improvement
•large reduction in energy consumption by reducing the size of the airwasher system
•increased cleanliness at the loom due to the increased number of air changes in the area where most of the dust and fiber fly is created
•better working conditions for the operators due to lower room humidity
•the diffusers can be installed above or below the trave-ling cleaner
•no maintenance required at the diffuser (since there are no wear parts)
LTG weave direct system, flow of the air stream
Air stream made visible through the use of a smoke cartridge: The humid air is directly guided to the shedding area of the loom
ELTG Aktiengesellschaft⋅Grenzstraße 7⋅D-70435 Stuttgart⋅+49 (0711) 8201-180⋅Fax -696 WDA/WDB-E-TP (09/00)
Internet: http://www.LTG-AG.de⋅E-Mail: [email protected]⋅Printed in Germany⋅Ausgaben mit früherem
Datum werden hiermit ungültig⋅Technische Änderungen vorbehalten⋅Former editions are invalid⋅Subject to technical modifications. 5
Air Diffusers Type WDA / WDB for direct conditioning
Technical Data
Type Air volume Pressure drop Length x Width x Height [m3/hxm] [Pa] [mm] WDA 300 -- 550 40 -- 110 1 000 -- 2 400 x 65 x 440 WDB 600 -- 1 000 40 -- 115 1 000 -- 2 400 x 105 x 440 200 100 0 -100 -200 200 400 600 800 50,0 55,0 60,0 65,0 70,0 75,0 80,0
Distance from the center of the air stream [mm] re la ti ve hu m id it y [% ]
distance from diffuser [mm]
Distribution of relative humidity leaving the diffuser
Type WDA Typ WDB
Dimensions min .2 50 ca. 19 0
