Diesel Radiator Company(DRC) has developed Heat Transfer Web(HTW) for our customers and potential customers, to aid in the selection of a cooling package that meets your cooling requirements.
HTW is for anyone needing to incorporate a piece of heat transfer equipment, such as a radiator, charge air cooler, oil cooler, or a combination of these, for use in their products or applications to provide the required cooling.

Getting Started

Once you have completed the sign up, you will have access to the HTW program.
Initially when you open the program, you are presented with the Home page, listing some standard, off-the-shelf, with a procedurefor determining which will meet your design and cooling needs. If a standard product does not meet your needs, a DRC application Engineer will be happy to assist in identifying a product to meet your needs. Click here to contact Engineering.

Prediction Input

The following information is required to generate each report:

Field Description
Reference The standard product number or quote number.
Engine Enter information regarding the Engine for which this quote is applicable. You may select from a list of already available engines using the drop down. This entry is informational only but is useful for identification of future uses.
Enclosure Type Select a type from the drop down. Informational only.
Description Use the description block to detail pertinent information about this application or quote.
Customer Notes Enter any specific information about the customer or information provided by the customer that pertains to this quote.
Elevation The elevation is expressed in ft. above sea level
Entering Air Temp. Air at core, on blower. Application will include pre-heat.
Heat Load The amount of heat to be removed from the source (i.e.,an engine). Heat load uses units of BTU, which is the imperial system and defines the amount of energy required to raise one pound of water one degree Fahrenheit.
GPM/CFM The flowrate of the fluid to be cooled. For liquids, the units are gallons per minute (GPM). For air (i.e., from a turbocharger) the units are standard cubic feet per minute (SCFM). SCFM meansthat these are the conditions of air at 70 deg. F., and at atmospheic pressure of 29.92" of mercury as specified by the Air Movement and Control Association (AMCA). These conditions produce an air density of .075 lbs. / cubic ft.

Prediction Output

The following is the information contained in the basic report output:

Field Description
Face Area The frontal area of each core of the cooling package, in units of square ft.
Heat Rejection The amount of heat to be dissipated by the cooling package (see Heat Load). For liquids, heat rejection is the same as heat load, and does this by determining the actual temperature of the fluid from the heat source. For air (i.e., from a compressor) the temperature from the source is fixed, and the heat rejection of the cooling package may be different from the heat load.
Fluid In The temperature of the fluid from the heat source to the cooling package.
Fluid Out The temperature of the fluid leaving the cooling package after removal of heat.
Fluid PD The pressure drop (PD) or change in pressure of the fluid between the inlet and exit connections of the cooling package. The units are pounds per square inch gage (PSIG).
Fluid Velocity The speed at which the fluid is traveling through the core of the cooling package. The units are feet per second (FPS).
Air In The temperature of the external air as it enters the cooling package which removes the heat from it, in degrees Fahrenheit.
Air Out This is the temperature of the external air as it leaves the cooling package after absorbing the heat that was rejected in degrees Fahrenheit.
Air to Liquid This is the maximum temperature of the external air entering the cooling package, that is capable of removing the heat load, when the coolant is at a stated maximum allowable temperature as it leaves the heat source.
Boost Pressure Applies to the increase in pressure of air between the inlet and outlet of a compressor or turbocharger. Units are PSIG.
Fan Properties
RPM Fan revolutions per minute
Type Fans are either sucker or blower. Sucker fans draw the external air through the cooling section before entering the fan. Blower fans draw air into the fan, then blow it through the cooling section.
Shroud Dia. The diameter of the opening for the fan. The closer the fan is to the shroud diameter, the better the performance of the fan, but some fan tip clearance must be allowed to prevent the fan from contacting the shroud assembly.
Par Vel. Heads A multiplier of velocity pressure to account for external resistance to air flow that adds to the resistance produced only by the core.
Fan/Core Space Distance between fan edge and core
# of Blades Number of fan blades.
PW/DEG Fan blade pitch is normally specified in degrees, or sometimes in projected width(PW) in inches. In either case the pitch or the projected width is normally specified at a specific radius relative to the hub. This is especially true for air foil style propellers.
Fan HP This is the horsepower that is required for the fan to move the air at the desired speed against the total resistance in the air stream. This power is supplied either by the engine or by a motor attached to the fan blade.
Shroud Derate A proprietary means of establishing a derate for a specific fan application that is applied to the manufacturers fan curve. The derate makes adjustments for air density, fan swept area of the core, and tip clearance of the fan blades to the shroud hole.