5% Accuracy ASTM E1623 Intermediate Scale Calorimeter

ASTM E1623 Intermediate Scale Calorimeter

1.Product Introduction

Intermediate Scale Calorimeter,used to measure the combustion characteristics of samples vertically exposed to a specific radiation source

2.Technical parameters

• 2.1 The equipment includes a radiant plate, a sample mounting bracket, a flue gas collection and sample gas collection system, a gas analysis and data processing system, and a gas supply system;
• 2.2 The radiant panel mounting bracket is welded by a 50*50mm square tube, and the surface is coated with a black coating, which can effectively increase the service life. The square tube can be cooled by cooling water to prevent thermal deformation;
• 2.3 The radiation plate is composed of a high temperature resistant ceramic plate, and the surface can form a fire-free infrared radiation source, and the intensity is not less than 50kw/m2;
• 2.4 The size of a single ceramic disc is 95*158mm, 4 pieces form a module, a total of 27 modules form a radiation source with a size of 1524*1330mm;
• 2.5 Equipped with pilot burner, which is ignited by electric spark ignition device;
• 2.6 Each 3 modules are individually equipped with blowing device, natural gas control device and Venturi mixer;
• 2.7 The sample mounting bracket is welded by carbon steel, which can withstand high temperature and stably support samples up to 152mm thick;
• 2.8 The sample mounting bracket is installed on the trolley, and the test sample can be quickly positioned and removed by the rail on the ground;
• 2.9 Equipped with weighing device, the accuracy is as low as 1g;
• 2.10 Equipped with a water-cooled protective cover to protect the sample from a surface temperature of less than 100°C before being exposed to radiation, and can be moved away from the water-cooled protective cover within 2 seconds through a pneumatic device;
• 2.11 Equipped with a pyrometer to measure the surface temperature of the radiant plate, with an accuracy as low as 1℃;
• 2.12 Electric heating wire igniter, installed at the bottom and top of the sample, used to ignite the test sample;
• 2.13 Schmidt-Boelter water-cooled heat flow meter, measuring range 0-50kw/m2, accuracy ±3%;
• 2.14 Heat flow calibration panel, made of 740kg/m3 silicic acid cover plate, size 1000*1000*12.7mm, 5x5 total 25 calibration holes arranged on the surface, used to calibrate radiant heat;
• 2.15 The conical flue gas collector is installed directly above the weighing table and the sample. The bottom size is 2440mm*2440mm and the height is 1000mm. The top of the conical flue gas collector is a square of 900mm*900mm*900mm. *900mm steel plate is installed in the top square to form a flue gas homomixer;
• 2.16 The shortest length of the stainless steel exhaust pipe is not less than 5000mm, the diameter is 400mm, and both ends are equipped with flue gas mixing devices;
• 2.17 The smoke exhaust system has sufficient capacity to collect all the flue gas generated in the combustion test, the exhaust volume of the fan is continuously adjustable, and the smoke exhaust capacity is not less than 8000m3/h;
• 2.18 The exhaust fan is a centrifugal fan, the inner tank is made of stainless steel, the temperature is not less than 300 degrees, and the frequency conversion fan is used to adjust the speed;
• 2.19 The ignition of the sandbox burner adopts the surface ignition method, and does not use spark ignition and other ignition methods with low ignition success rate.
• 2.20 Imported mass flow controller, the range is 0g/s-7g/s, the reading accuracy is not less than 1.5%, and the maximum output power is 300KW;
• 2.21 A pipe with a length of 500mm has three built-in thermocouples, and the thermocouple installation position is at least 400mm away from the collector;
• 2.22 The pipeline with a length of 2155mm in the comprehensive measurement area is equipped with a pressure probe, three thermocouples, and a gas sampling probe device;
• 2.23 The flue gas sampling system, consisting of soot filters, cold traps, drying columns, pumps and waste liquid regulators, should be able to ensure effective collection of flue gas samples and removal of waste liquid;
• 2.24 Imported diaphragm pump, flow rate: 33L/min, vacuum: 700 ㎜Hg, pressure: 2.5 bar;
• 2.25 The filter head of the American PARKER soot filter is made of solid PTFE, with 0.5um PTFE filter material inside;
• 2.26 The filter head of the moisture filter is made of solid PTFE, and the bottom liquid can be drained through the trap;
• 2.27 Compressor type condenser, cooling capacity 320KJ/h, dew point stability 0.1 degree, dew point static change 0.1K, protection grade IP20;
• 2.28 Imported rotameter with a range of 0-1L/min.
• 2.29 Three OMEGA thermocouples, all of which are 0.5mm diameter armored insulated K-type thermocouples. The contacts should be located on a circular arc with a radius of (87±5) mm from the axis, with an included angle of 120 °;
• 2.30 Two sets of two-way probes are connected with imported pressure sensors with a range of at least (0-100) Pa and an accuracy of ±2Pa. The response time of 90% output of the pressure sensor is at most 1s;
• 2.31 The gas sampling probe is connected with the gas regulator and the O2 and CO2 inlet gas analyzer. The accuracy of the oxygen analyzer is 0.02%, and the response time is no more than 12 seconds;
• 2.32 The imported oxygen analyzer should be of paramagnetic type and can measure at least 16%-21%(V/V) 02. The response time of the oxygen analyzer should not exceed 12s. Within 30min, the drift and noise of the analyzer No more than 100×10-6. The output of the analyzer to the data acquisition system should have a maximum resolution of 100×10-6;
• 2.33 The imported carbon dioxide analyzer should be IR type and can measure CO2 with a concentration of at least 0%-10%, and the linearity of the analyzer should be at least 1% of the full scale. The response time of the analyzer should not exceed 12s. The output of the analyzer to the data acquisition system should have a maximum resolution of 100×10-6;
• 2.34 The optical attenuation system is an incandescent light type, which is installed on the side pipe of the smoke exhaust pipe with a flexible joint and includes the following devices:
• 2.35 The lamp is an incandescent lamp and is used at a color temperature of (2900±100)K. The power supply is a stable direct current, and the current fluctuation range is within ±0.5% (including temperature, short-term and long-term stability);
• 2.36 Lens system, used to concentrate light into a parallel beam with a diameter of at least 20mm. The light-emitting hole of the photocell should be located at the focal point of the lens in front of it, and its diameter (d) should depend on the focal length (f) of the lens so that d/f is less than 0.04;
• 2.37 Detector and imported silicon photodiode probe, the photoelectric detection room has 0.1% linear stability, 10-bit measurement range, the spectral distribution responsivity of silicon photodiode is consistent with CIE (illumination curve), the standard function V(γ) can Achieve at least ±5% accuracy;
• 2.38 The 90% response time of the optical attenuation system should not exceed 3s;
• 2.39 Data acquisition system (used to automatically record data), for O2 and CO2, the accuracy is at least 100×10-6 (0.01%), for temperature measurement, the accuracy is 0.5℃, for all other instruments, the instrument's full-scale output value 0.1% of 0.1S for time. Adopt Taiwan Advantech's acquisition module;
• 2.40 The data acquisition system records and stores the following relevant values ​​at least every 3s:
• Time, s;
• Mass flow rate of propane gas passing through the burner, mg/s;
• The pressure difference of the bidirectional probe, Pa;
• O2 concentration, (V oxygen/V air)%;
• CO2 concentration, (V carbon dioxide/V air)%;
• The three-point temperature value of the comprehensive measurement area, K.
• 2.41 Standard test software, including various sensor calibration, system calibration, and software interface for technical instructions.
• What are calorimeters used?
• Calorimeters are used to measure the volume and heat produced during a certain time interval. The flow is passed through a tank partly filled with water whose thermal capacity and weight are known before the beginning of the experiment.