ForceRed SeriesHome » Industrial Infrared Heaters » Tube Heaters
What Is ForceRED?
The ForceRED Series is Space-Ray’s next generation infrared tube heater designed to provide the maximum Radiant Output at a ﬁxed emitter tube length, and can provide up to 30% more fuel savings than Standard models. This new series of tube heaters is especially engineered to take the efficiency of infrared tube heaters to the next level of fuel savings.
Space-Ray’s new ForceRED Series was designed by a team of engineers using both computational heat transfer modeling and the advanced European Radiant Output measurement system. The next generation infrared tube heater is here now. ForceRED Series is the future of extra high radiant efficiency infrared tube heaters.
Why Is ForceRED The Next Generation Infrared Tube Heater?
The ForceRED Series pushes radiant energy delivery to the next level by offering 30% more Radiant Output and 30% more fuel efficiency compared to other Standard tube heaters. ForceRED delivers more radiant energy to theﬂoor level thus helping maintain thermal mass in the ﬂoor which offers a quicker recovery when the doors are opened and closed frequently.
For background, infrared tube heaters generate Radiant Output as well as convective output and ﬂue losses. The Radiant Output is the key to producing fuel savings. It is the usable heat that is transferred directly to the ﬂoor level. Convective output rises ﬁrst to the ceiling and will eventually stratify down to the ﬂoor level, but there will be wasted heat trapped at the building’s ceiling which is not useful or fuel efficient.
The remaining energy (i.e. products of combustion) is discharged outside the building normally through the vent and is sometimes referred to as the ﬂue loss.
Below is a depiction of how Space-Ray’s new ForceRED Series maximizes Radiant Output while reducing the amount of heat energy lost to both convection and ﬂue losses.
A New Measurement -Setting The Standard With The Infrared Factor (IF)
A new term called the Infrared Factor (IF) is part of a AHRI 1330P standard titled "Performance Rating Standard for Radiant Output of Gas Fired Infrared Heaters". The Infrared factor is a linear scale of values from 7 to 15, where the factor is calculated from the measured Radiant Output of the heater versus the gross energy input in the fuel. The basis for the scale is that the minimum value of 7 represents the equivalent of the minimum permissible Radiant Output required in the ANSI Standard Z83.20 that is needed to be classed as a radiant heater. Infrared Factor values of 9 and 10 represent the average, standard heater values available on the market today.
How Do You Measure Radiant Output?
Until recent years there was no repeatable test methodology to determine the Radiant Output of tube heaters. Two previous major efforts by tube heater manufacturers and nationally recognized testing laboratories resulted in a test methodology with mixed results.
A new, reliable method has recently been developed in Europe which is documented in the European Standard EN416-2. In this standard, the Radiant Output is measured from a distance of 4" (100mm) below the heater to minimize the transmission losses. Measurements are taken with a water cooled thermopile in a grid with points of 4" x 4" (100mm x 100mm) across the width of the heater as well as along the entire length of the heater. The measurements are recorded using a computer data acquisition system. The data points are then integrated to give measurements per square decimeter and a calibration constant is applied to the measured mV values to convert to w/dm^2 . Thanks to the precision of this measurement system, Space-Ray engineers were able to use the results of experimentation with both heater design and heat input to maximize the heat output and get the highest Radiant Output for each model length.
What Is Different About ForceRED?
ForceRED is designed to maximize Radiant Output for a given emitter tube length (15’, 20’, 30’, 40’ etc…) at maximum emitter tube temperatures.
ForceRED is designed for maximize Radiant Output with the use of a unique dual reﬂector system − individual Asymmetric Reﬂectors & Outer Shield Reﬂector.
ForceRED is designed for Maximum Thermal Efficiency through the extensive use of special turbulators at the ﬁring leg as well as exhaust leg.
ForceRED is designed to only be installed horizontally to maximize Radiant Output radiant energy transfer to the ﬂoor level (as whenever tube heaters are angle mounted, they increase their convective losses which reduces the tube temperatures, and in turn reduces Radiant Output as much as 30%).
ForceRED is designed to produce lower levels of CO2 based on the lower ﬁring rates needed to heat equivalent sized buildings with a lower Btu/Hr input.
Why Does ForceRED Use Aluminum Reﬂectors With A Dual Reﬂector Design?
Aluminum reﬂectors are widely used by infrared heater manufacturers due to their high reﬂectivity rating of 0.97*. We asked our Engineers to start with a clean slate and consider other materials when designing the ForceRED Series. They reviewed polished Stainless Steel (430 2BA) material which has a lower reﬂectivity rating of 0.85*. Results showed that when subjected 3 days of operation, the stainless steel reﬂectors discolored and the Radiant Output declined by 3.1%. They also explored the use of Aluminized Steel (aluminum silicate hot bonded steel reﬂectors with a reﬂectivity of 0.80** and on initial operation they found that the Radiant Output was 6.3% lower than Aluminum reﬂectors. This solidiﬁed our decision to incorporate only aluminum reﬂectors on the new ForceRED series. Given the decision to utilize aluminum reﬂectors due to their high reﬂectivity rating of 0.97, our Engineering determined via Radiant Output tests that an air gap between the dual aluminum reﬂectors was superior to less reﬂective materials (e.g. stainless steel or aluminized steel) with a rigid or rolled insulation material sandwiched between the two reﬂectors. The result was a new, unique dual reﬂector design utilizing the insulating properties of an air gap in between two highly efficient aluminum reﬂectors which results in a substantial gain in overall Radiant Output.
*Sopp and Brandt, Reﬂectivity and Emissivity of Bare and Coated Aluminum, Finishes Division of Alcoa, Research Laboratories, 1975, P10
**Atlas Steel Products, Aluminized Steel Type 1, ASTM463-A. (www.atlassteel.com website article)