A, this
This instrument can be in an experiment measured at the same time different moisture state of materials of the regenerative heat coefficient, the coefficient of thermal conductivity temperature coefficient and specific heat, the simple device, high accuracy, test speed (a test ten minutes or so), the reference standard: JGJ51-2002 (light weight aggregate concrete technology procedures), etc.
The main technical performance
1, application scope:
This device can be used for determination in dry or wet conditions with different quality, and the plate colloidal, powder, granule shape the thermal conductivity of materials and heat storage coefficient, the temperature coefficient and specific heat. Measured material accumulation of heat transfer coefficient in 0.1 range 30 W/M2K.
2, sample size: thin specimen a 20 "x 20... (1.5 ~ 3) cm
Thick specimen two pieces of 20 "x 20... (4 to 10) cm
3, electricity source ~ 220 V, 50 HZ ac
4, shape dimension (long x width × high) 600 x 440 x 720 (mm)
5, working conditions
(1) the environment temperature 10 ~ 35 ℃ (2) more than 80% relative humidity
(3) requires steady at more than + /-1.5 ℃
6, the result of the measurement accuracy plus or minus 5%
7, connect PC, realize the automatic computer test, data printing output.
Three, the basic principle
With the principle of thermal stability based in short time, experimental materials heat, the experiment the temperature of the material changes, according to its change features through thermal conductivity of the solution of differential equation, can calculate the accumulation of heat coefficient test materials, heat conduction coefficient, the temperature coefficient and specific heat.