Condenser Selection

Condenser Selection

Selection Factors

There are five factors that are required to enable the selection of a suitable condenser:

1)	Refrigerant type
2)	Application (Low, medium or high temperature)
3)	Total heat rejection
4)	Condensing temperature
5)	Entering water temperature

Selection Procedure

1)	Determine system compressor capacity at the design conditions.
2)	Refer to hermetic compressor power curve chart or open compressor power curve chart to find the total heat rejection factor.
3)	Multiply the compressor capacity by the total heat rejection factor to obtain the THR.
4)	Air conditioning applications - use the THR as above.
	Medium temperature refrigeration applications - use the following formula: Compressor capacity x THR factor x 1.05 = THR
	Low temperature applications - use the following formula: Compressor capacity at design suction and condensing temperature x THR factor x 1.10 = THR

Condenser Approach Temperature

U.S. Standard Measurement (Metric Equivalent on Page 13)

Note: The approach temperature is the difference between the condensing temperature and the leaving water temperature.


Model S-2 S-2R CN2 Parallel Flow


Model S-2 S-2R CN2 Series Flow


Model S-3 S-3R CN3 Parallel Flow


Model S-3 S-3R CN3 Series Flow


Model S-4 S-4R CN4 Parallel Flow


Model S-4 S-4R CN4 Series Flow

In the interest of continuous product improvement, specifications or performance data may change without notice.

U.S. Standard Measurement


Model S-5 S-5R CN5 Parallel Flow


Model S-6 S-6R CN6 Parallel Flow

Note: The approach temperature is the difference between the condensing temperature and the leaving
water temperature.


Evaporator Performance Data

Application.
The curves shown are for fresh water cooling duties with water leaving temperatures between 35°F and 50°F. Entering liquid refrigerant temperature at T.X. valve 90°F. Suction superheat 10°F.

Approach Temperature.
The approach temperature is the difference between the refrigerant evaporating temperature and leaving water temperature.

Water Temperature Drop.
Water temperature drop will vary with flow rate. The curves opposite are for average Temperature Drop of 9°F at the design conditions. During pull down the temperature drop through the evaporator will vary.

Installation.
The "S" series evaporators are counterflow water to refrigerant. They should be adequately vapor sealed and thermally insulated to prevent condensation or ice forming on the evaporator shell or performance will be affected.

Equipment Selection.
When selecting compressor, use Suction Temperature 5°F below evaporating temperature to allow for suction line Pressure Drop and 10°F when suction accumulator is not used.

Pressure Drop


Parallel Flow


Series Flow

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