Water Cooled Oil Cooler

Transcription

1 Water Cooled Oil Cooler HOW Series Iron particle type: HOWF series FH Copper particle type: HOW series HOW Series Heat transfer area (Inside pipe) (m ) Heat exchange (kw) Flow rate (L/min) Oil side side age Oil Cooler: Iron particle type (Fixed pipe type) HOWF series 0.0, 0., 0., , 0.8, Oil Cooler: Copper particle type (Floating pipe type) HOW series 0.08, 0., 0., ,

2 Fixed ipe Type Oil Cooler HOWF Series Water Cooled: Iron article Type High heat transfer coefficient through the effects of turbulence The metal particles reliably generate turbulence by agitating the fluid, resulting in effective cooling without unevenness. Compact design requiring less installation space The compact design is only / /5 the size of current oil coolers. Installation requires very little space. Large heat transfer area The metal particles firmly welded the outer surface of the heat transfer pipes provide several times the heat transfer performance of fin tube configurations. Flexible installation orientation U-bolts are used mount the oil cooler, providing plenty of flexibility with regard the mounting orientation and method. Simple structure The baffle is also welded a metal particle layer, a design that eliminates problems that previously tended occur at the joins between the heat transfer pipes and baffles in current oil coolers. Minimal pressure drop The single-baffle structure increases the fluid path area, and the metal particles are mm in diameter and pose no clogging danger. Specifications Max. operating pressure (Oil and Water sides).0 Ma roof pressure (Oil and Water sides).5 Ma Fluid temperature Oil side: Max. 0 C/Water side: Max. Industrial water, Tap water Fluid cooled General petroleum-based hydraulic fluid, Lubricating oil, Non-flammable oil (water-glycol) Heat transfer medium Copper tube and iron particles (iron particles surface treated with copper alloy) Connection Note) Oil side: Threaded or Flange/Water side: Threaded Note) Refer Dimensions. Threads conform JIS B 0 parallel female thread (oil side) and tapered female thread (water side). Flanges conform JIS B (JIS OK FF). Heat transfer Oil side Note ) side Note ) area Heat exchange (inside pipe) Note ) Flow rate range Flow rate ressure drop (m ) (kw) (L/min) (L/min) (Ma) HOWF-0 HOWF- HOWF- HOWF Note ) Conditions: Turbine oil Class (ISO VG), oil outlet temperature, water inlet temperature C Note ) Increasing the cooling water flow greater than the rated flow will increase the heat transfer and provide better cooling, but should be avoided as the increased flow speed within the pipe can cause corrosion. Note ) Use an oil-side flow rate within the range indicated above. (The product cannot be used with flow rates exceeding this range.) HOWF 0 Oil side port size 0 08 How Order Rp (S) / Rp (S) / B flange B flange Weight (kg) Symbol Basic size (Equivalent hydraulic mor kw).5 Conditions In case of % heat loss of hydraulic mor kw Oil outlet temperature Water inlet temperature C Turbine oil Class (ISO VG) 5

3 Water Cooled Oil Cooler / Iron article Type HOWF Series Selection To select the appropriate model for your application, use the data at right and follow the steps below. Item Type (brand) Flow rate Inlet Temperature Outlet Heat exchange Step Fluid cooled Turbine oil Class (VG5) L/min 5 kw () L/min C : No Cooling Water Flow Rate Specified q From, calculate the oil type heat correction coefficient. Example: = 0.9 w From, calculate the water temperature heat correction coefficient. Example: B =. e Using the correction coefficients obtained in q and w, calculate the converted heat exchange. 5 Example: Q = =.9 kw 0.9 x. r Select the appropriate model from the model performance graph. Example: Oil outlet temperature, selected model HOWF In this case, the oil pressure drop can be calculated as follows. t From the model performance graph, determine the oil pressure drop. Example: = 0.0 Ma y From, calculate the oil type pressure drop correction coefficient. Example: D =. u Using t and y, calculate the corrected oil pressure drop. Example: = 0. x. = 0.05 Ma (Result) : HOWF, Oil pressure drop: = 0.05 Ma, : L/min Step : Cooling Water Flow Rate Specified q From, calculate the oil type heat correction coefficient. Example: = 0.9 w From, calculate the water temperature heat correction coefficient. Example: B =. e From the model performance graph, locate the intersection of the oil flow rate and heat exchange lines make a provisional model selection. Note that the rated water for the selected model can be determined from the specifications. Oil outlet temperature, provisional model selection HOWF, rated water L/min. r Divide the actual water by the rated water from e. If the calculated water is or greater, treat it as. Example: = 0. t From, calculate the water heat correction coefficient. Example: C = 0.85 y Using the correction coefficients obtained in q, w, and t, calculate the converted heat exchange. 5 Example: Q = = kw 0.9 x. x 0.85 u Select the appropriate model from the model performance graph. Example: Oil outlet temperature, selected model HOWF In this case, the oil pressure drop can be calculated as follows. i From the model performance graph, calculate the oil pressure drop. Example: = 5 Ma o From, calculate the oil type pressure drop correction coefficient. Example: D =.!0 Using i and o, calculate the corrected oil pressure drop. Example: = 0.5 x. = 0.09 Ma (Result) : HOWF, Oil pressure drop: = 0.09 Ma, : L/min erformance Graph q: Oil Outlet Temperature C Conditions Oil outlet temperature: C Water inlet temperature: C Fluid: Turbine oil Class (ISO VG) Oil side pressure drop:,, 0.05, 0. Ma indicated HOWF Oil pressure drop (Ma) HOWF HOWF HOWF HOWF HOWF HOWF L/min HOWF-0 HOWF- HOWF- HOWF Oil flow rate (L/min) performance values include an allowance (approx. %) for water deposits (Oil type/heat correction coefficient) Water-glycol etroleum Oil viscosity coefficient (mm /s ( C)) (Water temperature/heat correction coefficient) Oil outlet temperature C C Water inlet temperature ( C) 0. C C 55 FH HOW

4 HOWF Series erformance Graph w: Oil Outlet Temperature erformance Graph e: Oil Outlet Temperature C Conditions Oil outlet temperature: Water inlet temperature: C Fluid: Turbine oil Class (ISO VG) Oil side pressure drop:,, 0.05, 0. Ma indicated HOWF HOWF HOWF HOWF HOWF 0. HOWF HOWF HOWF-0 HOWF- HOWF- HOWF- L/min Oil pressure drop (Ma) Oil flow rate (L/min) performance values include an allowance (approx. %) for water deposits. Conditions Oil outlet temperature: C Water inlet temperature: C Fluid: Turbine oil Class (ISO VG) Oil side pressure drop:,, 0.05, 0. Ma indicated Oil pressure drop (Ma) HOWF HOWF HOWF HOWF HOWF HOWF HOWF 0 0 Oil flow rate (L/min) HOWF-0 HOWF- HOWF- HOWF- performance values include an allowance (approx. %) for water deposits. 0 L/min (Water /Heat correction coefficient) Table for calculating required heat exchange from hydraulic mor output Water used/rated water (Oil type/ressure drop correction coefficient) C Oil outlet temperature C Heat loss 0% Mor output (kw) Note) If the hydraulic pump mor output is kw and the heat loss is %, the required conversion is.5 kw. (Select the heat loss percentage based on the hydraulic circuit.) 0% % Oil viscosity coefficient (mm /s ( C))

5 Water Cooled Oil Cooler / Iron article Type HOWF Series Construction/Component arts!0 u o w t r e y q i The HOWF series employs a multi-pipe design with the heat transfer pipes arranged in a circular pattern. The area between the pipes is filled with porous metal particles. flows through the heat transfer pipes. Fluid flows in through the inlet on the side of the cooler and passes among the metal particles outside the heat transfer pipes, finally reaching the open cavity in the center. It then flows axially though the center cavity, once again passes among the metal particles, and flows out through the outlet. The cooling water inlet and outlet can be reversed. However, the oil inlet and outlet cannot be reversed, and the cooling water and oil flow paths cannot be switched. FH HOW Component art Materials Description No. q w e r t y u Body ipe plate Metal particle cover Heat transfer pipe Metal particles Baffle Water chamber cover Material STK SS0 Stainless steel CT SS Stainless steel FC0 Note Copper-plated Component arts No. Description Material Quantity HOWF-0 HOWF- HOWF- HOWF- i Gasket NBR 8 o Gasket B NBR 8!0 Corrosion-resistant zinc Zn 0 5

6 HOWF Series Dimensions HOWF- C E T (.C.D) x R øj øg x Rc S K N H F X B D Z L M Y U HOWF- W Mounting hole C E T (.C.D) x R x Rc S øg N F X D Z L M HOWF-0 HOWF- HOWF- HOWF B C D E F 5 5 øg H øj 8 8 K L 0 0 Y øj H K B øu Mounting hole M N R Rp (S) / Rp (S) / Rp (S) Rp (S) / B flange / B flange B flange (mm) S / / / / / HOWF-0 HOWF- HOWF- HOWF- T 0 0 U ø W X Y Z Note) Threads conform JIS B 0 parallel female thread (oil side) and tapered female thread (water side). Flanges conform JIS B (JIS OK FF). B dimensions are maximum values. The only is equipped with a fluid drain plug directly below the. Since foot and U-bolts are not pre-mounted, they should be mounted during installation. 58