series MULTINOZZLES Multinozzles diffusers

Multinozzle Diffuser Multinozzle Diffuser DF49MT3 __________________________________ 4 Types and sizes _____________________________________________ 5 Key to symbols ______________________________________________ 9 Technical data _______________________________________________ 10 Example of selection _________________________________________ 18 Coding ____________________________________________________ 19

INTRODUCTION Due to the growing demand in the market for building large spaces in hotels, shopping malls, theatres, etc., we have developed a diffuser which is able to combine design and efficiency. The long range offered by the DF49MT3 multinozzle diffusers coupled with their low noise level and their aesthetics make this diffuser a benchmark in the current marketplace. The long-range multinozzle diffusers of the DF49MT3 series comprise a rectangular faceplate in steel sheet where 3 to 10 nozzles can be incorporated per row in a maximum of 3 rows in a standard execution. The nozzles are manufactured...

l (m) ax(O) L(m) X (m) Y(m) H (m) K (m) Hc(m) H, (m) HR(m) Q (m3/h o l/s) Ak (m2) Vx(m/s) VH(m/s) VK (m/s) VHR (m/s) AT0(oC) ATX(oC) ATx(oC) qx / qo Apest (pa) Lwa dB(A) X„,- x.- x„ Distance travelled from the equipment to the impact point of the air jet (with another air jet or the wall) in isothermal conditions. Discharge angle. Horizontal distance from the equipment to the impact point of the air jet (with another air jet or the wall). Air jet range. Deviation in the air jet caused by the difference in temperature between the supplied air and the environment. Equipment location height. Height...

Multinozzle DiffuserSelection table By using the quick selection table, we can obtain data on range, pressure drop and sound power in isothermal conditions and for different end speeds. The data are for different lengths and for one row of nozzles. For a larger number of nozzles, apply the constants on the table. Table of correction quotients for noise output (FL) and range (FX), static pressure does not have to be corrected.

Multinozzle DiffuserSelection Graphs The graphs which are shown bellow all correspond to 1 row of nozzles. If you would like to make a study of 2 or 3 rows, you must choose the air flow volume corresponding to 1 row and then apply the correction quotients which appear on the respective tables which are shown with the graphs. For example, if we have an air flow volume of 1000 m3/h and we want to install a 2-row multinozzle diffuser, on the graph we must select an air flow volume of 500 m3/h (the volume which would correspond to one row) and apply the corresponding correction quotient, in this...

Multinozzle Diffuser Graph 2. Maximum vertical penetration Correction quotient table Nº f ows Fy

Multinozzle Diffuser Graph 3. Speed of the air jet within the range Correction quotient table

Multinozzle Diffuser Graph 4. Vertical deviation of the air jet 0,01 Correction quotient table Nº f ows Fd

Multinozzle Diffuser Graph 5. Relationship between air flow speeds

Multinozzle Diffuser Graph 6. Induction rate Correction quotient table Nº f ows Fq

Multinozzle Diffuser Graph 7. Temperature quotient X (m) Correction quotient table Nº f ows FT

Multinozzle Diffuser Example of selection Input data: L = 15 m H = 6 m (Height of location above the floor) QMULTINOZZLE = 500 m3/h Supply temperature = 19 OC Ambient temperature = 25 OC ΔTO = - 6 OC HH = 1,8 m (Height of the habitability area) We must make a selection in order to obtain: - A maximum speed in the habitability area of 0,2 m/s. - The vertical temperature gradient must not exceed 3 OC. - The noise output level must not exceed 35 dB(A). Selection: With the air flow volume we have and on the basis of the noise output limit, on the quick selection table we obtain a multinozzle diffuser...

Multinozzle DiffuserCoding. Example The coding describes the model ordered by the customer. Multinozzle without frame With frame For ceiling or plaster wall With mounting frame With screw holes Example of coding: DF49MT3 - CB - 1 - 05 - Ral 9005 Long-range multinozzle diffuser, with frame, with 1 row and 5 nozzles per row, painted in Ral 9005 Diffuser finish

Multinozzle Diffuser

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