Temp-Troller Selection Procedure

ELECTRA-COOL INFORMATION
AC-COOL INFORMATION
APPENDIX

Temp-Troller Electra-Cool
Selection Procedure

Plotted pressure drop (PSID) values based on viscosity of 50 SSU. If viscosity is not 50 SSU, multiply PSID value by tabulated multiplier to obtain estimate of actual PSID:

Viscosity

PSID Multiplier
50 SSU 1
100 SSU 1.75
150 SSU 2.3
200 SSU 2.75
250 SSU 3.2

Step 1

System flow rate (GPM) of hot liquid

Step 2

Heat transfer requirement = input energy lost to heat 1 HP = 2545 BTU/HR

Performance curves based on Inlet Temperature Difference (ITD) of 50°F ITD = (Inlet temperature of hot liquid) - (Ambient temperature of air)

If ITD is not 50°F: Heat transfer requirement = Input energy lost to heat x 50°F/ITD

Step 3

Select curve for heat exchanger model at or above heat transfer requirement

Dimensional Data

Figure letter refers to the diagrams above. Dimensions are in inches. Performance Curve # refers to the Performance Charts below.

Performance Charts

Heat transfer performance based upon 50°F ITD with barrel style motor. See Selection Procedure for sizing heat exchanger.

Pressure Drops Indicated:

  • 5 PSID
  • 10 PSID
  • 15 PSID
  • 20 PSID

Temp-Troller AC-Cool
Selection Procedure

Plotted pressure drop (PSID) values based on viscosity of 50 SSU. If viscosity is not 50 SSU, multiply PSID value by tabulated multiplier to obtain estimate of actual PSID:

Viscosity

PSID Multiplier
50 SSU 1
100 SSU 1.75
150 SSU 2.3
200 SSU 2.75
250 SSU 3.2

Step 1

System flow rate (GPM) of hot liquid

Step 2

Heat transfer requirement = input energy lost to heat 1 HP = 2545 BTU/HR

Performance curves based on Inlet Temperature Difference (ITD) of 50°F ITD = (Inlet temperature of hot liquid) - (Ambient temperature of air)

If ITD is not 50°F: Heat transfer requirement = Input energy lost to heat x 50°F/ITD

Step 3

Select curve for heat exchanger model at or above heat transfer requirement

Dimensional Data

Figure letter refers to the diagrams above. Dimensions are in inches. Performance Curve # refers to the Performance Charts below.

Performance Charts

Heat transfer performance based upon 50°F ITD with barrel style motor. See Selection Procedure for sizing heat exchanger.

Pressure Drops Indicated:

  • 5 PSID
  • 10 PSID
  • 15 PSID
  • 20 PSID

APPENDIX

A.S.T.M. Standard Viscosity Temperature Chart & Fin CoolⓇ Air Static Pressure Drop - 12 FPI

*For viscosities less than 35 SSU use 35 SSU in sizing the heat exchanger.

Hose Diameter vs Fluid Flow

Hose I.D. (inches)

Flow - Return Line (GPM)

Flow - Pressure Line (GPM)
1/2 2 - 3 5 - 8
3/4 4 - 6 10 - 20
1 8 - 12 10 - 35
1 1/4 12 - 20 30 - 55
1 1/2 20 - 30 45 - 90
2 35 - 60 75 - 150

Air Velocity & Air Flow

To determine air velocity in Feet/Minute (FPM) through the heat exchanger from known air flow in Feet3/Minute (CPM):

Air Velocity (FPM) = Air Flow (CPM) / Heat Exchanger Finned/Core Area (Feet2)

Altitude Adjustment

Performance Curves are based on sea level conditions. Derate heat transfer performance for tube and fin heat exchangers by 2.5% for every 1000-foot gain in altitude.

FLOW

GPM = Displacement (Inches3/Rev) x RPM / 231

ENERGY

HP = Flow (GPM) x Pressure (PSI) / 1714