Product Categories

- Rooftop Packaged Unit
- Energy Recovery Rooftop Packaged
- Free Cooling Rooftop Packaged
- Rooftop Packaged Unit With Economizer
- Explosion Proof Rooftop Packaged
- Rooftop Packaged Unit With Hot Water Coil
- Rooftop Packaged Unit With Gas Burner
- Tent Packaged Unit
- Rooftop Packaged Unit For Rent
- Tropical Rooftop Packaged Unit
- Split Rooftop Unit
- Ducted Split Unit
- Portable Rooftop Packaged Unit

- Water Chiller
- Air Cooled Water Chiller
- Water Cooled Chiller
- Glycol Water Chiller
- Modular Water Chiller
- Scroll Water Chiller
- Screw Water Chiller
- Mini Chiller
- Low Temperature Water Chiller
- Dairy Water Chiller
- Brine Water Chiller
- Brewery Water Chiller
- Injection Machine Water Chiller
- Plastic Machine Water Chiller
- Food Water Chiller

Online Service

- Contact Person: Mr. Richard Lee
- View Contact Details

News

Choosing the right size recirculating chiller adds to the economies of its use. The optimum size needed is based on the amount of heat your application is generating, plus additional power to maintain temperature under varying loads.

Normally the manufacturer of the equipment you are cooling will supply heat removal information, which will include BTU/hr or watts to be removed along with flow rate and desired and inlet and outlet temperatures for the equipment.

If information isnt available, heres how to calculate the heat load of your system:

BTU/hr = (T1-T2) x gpm x 60 min/hr x 8.33 lb/gal x Cp

T1 = temperature of coolant leaving the equipment, deg F

T2 = temperature of coolant entering the equipment, deg F

gpm = gallons per minute of coolant flowing through the equipment

Cp = specific heat of coolant; Water = 1.0

Measure temperature with the same thermometer if possible of with two thermometers of known accuracy. Measure gpm using a flowmeter of by collecting the coolant in a known volume for a given period of time.

Additional Considerations

If ambient temperature of the cooling location is above 68°F, add 1% to the calculated BTU/hr for each 0.9°F above 68°F.

If operating at 50Hz, add 20% to the calculated BTU/hr.

If line voltage is consistently below rated voltage, or if you work at high altitude, add 10% to the calculated wattage.

Future growth cooling needs or variability of heat output of existing unit.

Conversions

Watts = BTU/hr / 3.413

Tons = (BTUs / hr) / 12,000

Choosing the right size recirculating

Watts

= [DT° x (K)] / S

Where

:

DT= The difference (D) between incoming and outgoing tap water temperature (T) of your instrument. Measure carefully using the same thermometer for both locations. You may measure in Celsius or Fahrenheit.

S = The number of seconds to fill a one liter container.

K = Conversion constant for density and specific heat of water.

Measured in

:

Celsius: Watts = [DT°C (4,186)] / Seconds

Fahrenheit: Watts = [DT°F (2,326)] / Seconds

Additional Considerations

:

If ambient temperature of the cooling location is above 20°C, add 1% to the calculated wattage for each 0.5°C above 20°C.

If operating at 50Hz, add 20% to the calculated wattage.

If line voltage is consistently below rated voltage, or if you work at high altitude, add 10% to the calculated wattage.

Future growth cooling needs or variability of heat output of existing unit.

Conversions

:

BTUs / hr = (watts) * 3.413

Tons = (BTUs / hr) / 12,000

Calculating Process Heat Loads

Below are some basic methods for calculating the heat load of various industrial processes. In order to use the heat load calculations some general definitions need to be addressed. The calculations will reference the following basic definitions and formulas:

One Ton of Refrigeration = 12,000 Btu per Hour

One Refrigeration Ton = 3,025 kg calories per hour

Btu/hr for Water = GPM x 500 x Delta-T

Btu/hr for other fluids = Lbs. Per Hr. x Specific Heat x Specific Gravity X Delta-T

Btu/hr for Solids = Lbs. Per hour x Specific Heat x Delta-T

Btu/hr = kW x 3,413

Btu/hr = HP x 2,544

PSIA = PSIG 14.7

Btu/hr = kW x 1000 / .293

kW = Btu/hr / 1000 x .293

Lbs/Hr = GPM x Density x 8.022

Lbs/Hr = GPM x 501.375 x Specific Gravity

Specific Gravity = Density / 62.4

GPM of Water = Btu/hr / Specific Heat / Specific Gravity / Delta-T / 500

Heat Rejection for Common Industrial Machinery

Air Compressors 1,500 Btu/hr per HP

Air Compressor Aftercooler 1,500 Btu/hr per HP

Vacuum Pump Cooling 1,500 Btu/hr per HP

Hydraulic Cooling 2,544 Btu/hr per HP x .6

Hot Runner ..3,420 Btu/hr pr kW

If component heat loads cannot be learned from customer supplied data, multiply the total input Hp or kW times the appropriate conversion factor. This represents the maximum possible heat load.