Heat exchanger AB-E oil / water system: single tube. 1 Area of application. 2 Model. Company standard. Replaces: Issue

Transcription

1 Company standard oil / water system: single tube AB-E Replaces: Issue Area of application The coolers to this standard are suitable for cooling the following fluids: Mineral oil HLP to DIN Oil-water emulsion HFA-E to VDMA Water emulsion HFC to VDMA Phosphate ester HFD-R to VDMA Fresh, river, sea and brackish water may be used as cooling medium (see table 3). 2 Model Oil Cooling water Oil Oil Cooling water Bosch Rexroth AG Department: BRI/TDV3 Industrial Hydraulics Created: C. Ewald Zum Eisengießer 1 D Lohr am Main Examined: E. Wiesmann Tel.: ( ) 18-0 Fax: ( ) Technical responsibility: BRI-AB/PMT Page 1 / 7

2 Page 2 / 7 AB-E : Type code Example: Waermetauscher AB32-09 / 056 G / F AB standard Nominal size 56 = = = = 132 Connection type Thread = G Tube stack length 190 = = = = = = = = = = = = 091 Material code (see table 1) 1 = 01 2 = 02 Clamp Without clamp With feet = without designation = F 4 Ordering example nominal size 56 with threaded connection, tube stack length 370 and clamp with feet: WAERMETAUSCHER AB32-09/056G /F Material no. R Selection table Table 1 Designation: Waermetauscher AB32-09/056G /F AB32-09/056G /F AB32-09/056G /F AB32-09/080G /F AB32-09/080G /F AB32-09/080G /F AB32-09/110G /F AB32-09/110G /F AB32-09/110G /F AB32-09/132G /F AB32-09/132G /F AB32-09/132G /F Material no. R R R R R R R R R R R R Note: Further options see material master.

3 Page 3 / 7 AB-E : Dimensions d 3 d 3 h 1 h 3 h 2 h 3 h 2 d 3 l 7 d 2 l 8 l 6 l 2 l 3 l 4 d 4 Rotatable clamp h d d 1 l 5 d 2 l 1 d 2 l Table 2 Tube Dimenisons DN stack l d d length 1 d 2 d 3 d 4 h h 1 h 2 h 3 l l 2 l 3 1 min. max. 56 1) ,6 3/4 1/4 8, , ) ,9 1 1/2 8, , ) ,4 1 1/4 1/2 9, , ,8 1 1/2 3/4 9, , l 4 l 5 l 6 l 7 l , DN Tube stack length Capacity Empty weight kg in the tubes l around the tubes l 56 1) 190 1,7 0,15 0, ,4 0,18 0, ,1 0,22 0,5 80 1) 210 3,5 0,30 0, ,9 0,40 0, ,3 0,50 1, ) 250 7,0 0,80 1, ,1 1,00 2, ,2 1,30 3, ,0 1,80 3, ,0 2,30 5, ,6 2,80 6,4 1) Fixing of the cooler is with a clamp

4 Page 4 / 7 AB-E : Material code Table 3 Water type Water quality Source of supply Material code Drinking water Municipal waterworks, springs Fresh water Industrial water Cooling tower circuits, 01 factory wells Stream and river water Sea water High sea Brackish water Mixture of sea and river Coastal areas, mouths of 02 water rivers, harbours 7.1 Remark The material codes shown in table 3 are recommendations. Other combinations may be necessary according to the application. When using the cooler with well, stream, river or brackish water, a water analysis must be requested. Table 4 Material code Pipe SF-Cu CuNiFe Tube base Plastic Casing AlSi 12 Water chamber GG Regulation On/off control of the cooling water by means of solenoid valve and thermostat is preferred to proportional control. Proportional control of dirty water causes floating particles to be desposited due to the low water velocity in the partial load range leading to corrosion. If river, sea or brackish water are used for cooling, a dirt trap with a mesh size of approx. 0,5 mm should be fitted in the supply line. 8 Calculations Table 5 The minimum requirements to enable calculations are: From these it follows that: Oil flow V OIL (l/min) ETD = t OIL - t KE (K) Power loss P V (kw) Inlet temperature difference Inlet temperature (oil) T OIL ( C) P 01 = P V (kw/k) ETD Inlet temperature (cooling water) t KE ( C) Specific cooling capacity at ETD = 1K HLP/HFD HFC HFA 36 x P V 17,2 x P V 14,7 x P V Cooling t OIL = t = t = (K) V OIL V V 14 x P V Heating H 2 O t K = (K) Cooling water requirements to table 8 V K Example: Given: Selected: P V = 14 kw; V OIL = 50 l/min; t OIL = 60 C; t KE = 20 C Type AB 32-09/08G (see diagram 1) x x 14 ETD = = 40 K; P 01 = 40 = 0,35 kw/k t OIL = 35 =14,4 K; t K = 17 = 11,5 K

5 Page 5 / 7 AB-E : Technical data 9.1 Diagram (12) (11) (10) (7) (9) (8) P 01 (kw/k) (3) (2) (1) (6) 2.0 (5) (4) p Oil (bar) v = 36 mm 2 /s (cst) Basis: T AOil 50 C 3.0 T EW 20 C ISOVG 32 C Table 6 Code in diagram 1 AB 32-09/056G (1) AB 32-09/056G (2) AB 32-09/056G (3) AB 32-09/080G (4) AB 32-09/080G (5) AB 32-09/080G (6) v Oil (l/min) Code in diagram 1 AB 32-09/110G (7) AB 32-09/110G (8) AB 32-09/110G (9) AB 32-09/132G (10) AB 32-09/132G (11) AB 32-09/132G (12)

6 Page 6 / 7 AB-E : Conversion of oil side pressure drop to other viscosities Table 7 Viscosity mm 2 /s Factor f 1 0,6 0,7 0,8 0,9 1,0 1,1 1,2 1,4 1,6 4,0 9.3 Conversion of oil side pressure drop for other water temperatures Table 8 Water temperature tw Factor f 2 1,0 0,97 0,94 0,91 0,88 Formula: px = p 36 x f 1 x f 2 Example: Selected type: AB32-09/080 G /F V OIL = 50 l/min with 40 mm 2 /s t KE = 20 C p OIL = 0,7 x 1,1 x 1,0 = 0,77 bar 9.4 Max. permissible working pressure Casing area (oil) 16 bar Tube area (water) 8 bar 9.5 Permissible operating temperature Casing area (oil) 100 C Tube area (water) 100 C 9.6 Technical data Table 9 Cooling water requirement v w [l/min] in relationship to oil flow Max. and min. flow 2) Oil Water V ÖL [l/min] P [kw] [l/min.] [l/min.] max. min. max. min. AB32-09/056G /F AB32-09/056G /F AB32-09/056G /F AB32-09/080G /F AB32-09/080G /F AB32-09/080G /F AB32-09/110G /F AB32-09/110G /F AB32-09/110G /F AB32-09/132G /F AB32-09/132G /F AB32-09/132G /F ) Max. cooling power P [kw] at ETD 40 and max. oil- and water flow 9.7 Water side pressure drop Table 10 Coolers AB32-09/056G AB32-09/080G AB32-09/110G AB32-09/132G l/min bar 0,23 0,40 0,90 0,10 0,14 0,20 0,06 0,12 0,25 0,44 0,18 0,31

7 Page 7 / 7 AB-E : Installation The cooler may be mounted horizontally or vertically as required. Pipe assembly (general rules) The cooling water may only flow in and out via the covers, and the warm fluid only via the casing flanges. When connecting the water connections, no force should be used. The use of tapered fittings are not recommended. Direction of flow Due to the 4 way cooling water flow path, the direction of the oil and water flow can be selected as required. It is however recommended that the flow direction is as shown in the following diagram. Warm medium Cooling water 11 Spare parts Table 11 DN O-ring FKM Dimensions Material no ,0 x ,5 x ,0 x ,0 x ,0 x ,0 x ,0 x ,0 x 5 R Qty. per cooler 1 12 Assembly guidelines For mounting the cooler onto the reservoir wall see AB sheet For other standards see AB-E Coolers and heaters