Protective plate heat flux meter is an instrument used to measure the thermal conductivity of materials. Its working principle is based on the protective plate heat flux method, which calculates the thermal conductivity of a material by measuring the heat flow through it.
Specifically, the instrument mainly includes the following parts:
Heating element: The heating element is the core part of the instrument and is used to generate heat and transfer it to the material being measured. Heating elements are usually made of materials such as heating wires or heating films.
Temperature Measuring Element: The temperature measuring element is used to measure the temperature of the material to be measured and convert the temperature signal into an electrical signal for data processing. Temperature measuring elements are usually made of materials such as thermocouples or RTDs.
Protective plate: The function of the protective plate is to prevent heat loss and the influence of external heat on the test results, and at the same time reduce the measurement error. It is usually made of insulating materials, such as aluminum silicate fiber paper, etc.
Fixture: The fixture is used to fix the material to be measured and ensure that the material to be measured is in close contact with the heating element and the temperature measuring element to reduce the measurement error. Fixtures are usually made of metal or non-metallic materials.
Data processing system: The data processing system is used to process the measured electrical signals and calculate the thermal conductivity of the measured material. Data processing systems are usually implemented using computer software or hardware circuits.
When using this instrument for measurement, it is necessary to place the measured material in a fixture and ensure that the measured material is in close contact with the heating element and the temperature measuring element. Then, the parameters such as the heating power of the heating element and the sampling frequency of the temperature measuring element are set by the instrument control system, and the test program is started. The instrument automatically records temperature changes and heat flow data, and calculates the thermal conductivity of the measured material through a data processing system.
It should be noted that since the instrument involves high temperature and electrical systems, it is necessary to follow the safety operation procedures when using it and ensure that the instrument is well grounded to prevent the occurrence of safety accidents such as electric shock and fire. At the same time, in order to obtain accurate measurement results, the instrument needs to be calibrated and maintained regularly.
Main parameters: Control system: PLC+Windows system, desktop computer.
Operation interface: color 7-inch touch screen, Chinese and English switching;
Thermal conductivity range: 0001-5W mk and cylindrical 3-1000W mk;
Test accuracy: better than 5%.
Hot plate temperature control: standard room temperature - 9999C, others are optional room temperature -15000C and room temperature -30000c, greenhouse 15000C or room temperature 30000c
Cold surface temperature: thermostat 5--90C (optional according to temperature).
Test surface size: 150*150mm,60 (or.)80) mm, clamping sample width 60 mm
Experiment time: about 3 hours.
Heat Flow Range: 05-2000W m2, resolution 025 w/m2
Power supply: 220V;50hz;
Heat Flow Meter: WPY Heat Flow Meter, Heat Flow Parameter 2326w/m2*mv。
Bath temperature range: 15L---0-99 degrees.
The plexiglass draft shield allows direct observation of the experimental process.
The protective plate heat flux method is a method used to determine the thermal conductivity of materials, which has several advantages:
aHigh accuracy: The protective plate heat flow meter method can provide high measurement accuracy, and can measure materials from low to high thermal conductivity. This method is based on the principle of heat conduction, and calculates the thermal conductivity by measuring the heat flow and temperature difference on the material, and has high accuracy.
bWide measuring range: The protective plate heat flux method is suitable for the measurement of thermal conductivity of various materials, including solids, liquids and gases. Whether it is an insulating material with a low thermal conductivity or a conductive material with a high thermal conductivity, this method provides accurate measurements.
cNon-destructive testing: The protective plate heat flow meter method is a non-destructive testing method that does not require any physical or chemical changes to the material. This makes the method ideal for sequential, multiple measurements of a sample without concerns about material integrity or usability.
dRapid measurement: Compared with other traditional thermal conductivity measurement methods, the protective plate heat flow meter method has a faster measurement speed. It can complete measurements in a relatively short time, which increases work efficiency.
Easy to implement: The operation of the protective plate heat flow meter method is relatively simple and does not require complex equipment or extensive sample preparation. This makes the method easy to implement and operate in both laboratory and industrial settings.