Calorimeter-Temperature Sensor

C-3500 Flame Intensity Calorimeter

Signal

Model C-3500 Flame Intensity Calorimeter

ITI Model C-3500 Flame Intensity Calorimeter is a Temperature Sensor: Designed to be inserted directly into a flame front, for the instantaneous determination of impinging heat energy. Applications range from Power Generation, Hotbox Flame Control, Jet Exhaust Output, Natural Gas Energy Content, Reactor Output, Furnace Intensity and several ASTM Flame Test Evaluations.

Inlet-Outlet-THUMBSensor-THUMB

 

 

The Model C-3500 Flame Intensity Calorimeter probe is applied to the determination of the total heat flux (Radiation plus Convection) in high temperature combustion of gases.The Model C-3500 Flame Intensity Calorimeter probe is applied to the determination of the total heat flux (Radiation plus Convection) in high temperature combustion of gases.The model C-3500 Flame Intensity Calorimeter provides a total (convection plus radiation) heat flux measurement of the intensity of combustion gases. Designed for direct immersion in flame fronts, this water-cooled instrument thermoelectrically transduces a signal, which is calibrated in accordance with an Absolute Heat Flux Standard.

The primary application for which this probe was developed, is the measurement of combustion chamber heat fluxes in power generating facilities, allowing the direct and instantaneous power evaluation of combustion chamber gasses for best stoichiometric fuel/air mix. Additionally, the calorimeter is widely used in verifying heat source intensities at different cracking tower stations along the complete oil refinery process, which assures process repeatability. Another important application is applied to the flame testing of materials and components under Federal Aviation Regulations.

The flame intensity sensor is a 1.00 – 2.00 inch diameter, refractory metal rod that is placed in direct contact with the heated gasses. The signal generated is directly proportional to the local heat flux; a radial traverse of the source yields a measure of the total power output. The sensor yields D.C. millivolt signals that can be measured with conventional millivolt meters or recorders.

FEATURES

  • Heat Fluxes to 500 kW/m2
  • Linear signal

APPLICATIONS

  • Standardization of high temperature heat sources
  • Combustion chamber heat flux determinations
  • Rocket/Jet Plume power output
  • Fire/Flame testing
  • Boiler/Flame Box power output

SPECIFICATIONS

Temperature (max) ………… Depends on cooling
Max Flux Density ……………………. 108 Watts/M2
Nominal Sensitivity …………… 100 Watts/M2, uV
Accuracy ………………………………………….. 5%
Response Time …………………………..< 0.1 Sec.
Probe Diameter ………………………. 25 – 50 mm
Probe Length ………………… 1 m Std. (Variable)
Cooling…………………………………………. Water
Materials …………………….. 316 Stainless Steels
Manufactured in Flow Through or Re-flow Geometries.

Max Flux Density depends upon the flow rate of cooling water.


 

How the Calorimeter Works

The ITI C-3500-3600 Flame Calorimeter is to be inserted through a port directly into the combustion gas stream. The ITI HT-50 High Temperature Heat Flux Transducer has been welded and heat sunk to a location 50mm from the tip of the C-3500 Probe(C-3600 has sensor at tip of probe). The location of this sensor is on the same side as the water discharge port and has been temporarily marked for your convenience. This location should be noted and situated so that the combustion gasses impinge directly upon it.  The greatest detected fluxes will occur when the sensor location is at 900 or at a stagnation point to the flame front.

The calorimeter includes an inner water feeding tube within the hollow cylindrical probe. Cool water enters through the inner tube and flows out through the annular gap between the inner tube and inner wall of the outer probe tube. A control system varies the rate of flow of water to maintain the inside temperature of the probe wall at a constant value. Water coolant should be supplied to the probes rear inlet at a flow rate of 10 – 20 Liters/Minute. Boiling of the cooling water must never be allowed, for very high thermal flux rates, the water/coolant flow rate must be increased until the exit water temp is tepid. The average heat flux is calculated by multiplying the C-3500-3600 Calibration Constant by the measured DC micro-voltage.