Heat transfer coefficient of enclosure structure

The heat transfer coefficient of the building envelope is the core parameter for measuring the thermal performance of the building envelope. It is defined as the amount of heat transferred per unit area of the envelope per unit time at a unit temperature difference (1 ℃ or 1K), measured in W/(m # 178; # 183; ℃). The calculation needs to comprehensively consider factors such as material thermal conductivity, structural layer thickness, surface heat transfer coefficient, and thermal bridge effect. ‌‌

　　Overview of building envelope heat transfer coefficient detector:

The TR70B wall heat transfer coefficient inspection instrument adopts the heat flow meter method supported by most experts for testing, which meets the technical parameter requirements of GB/T 23483-2009 and JGJ/T 132-2009 standards. We have adopted a microcontroller mode and an instrument amplifier with high stability, low drift, and low noise. At the same time, we use high-precision platinum resistors as temperature measuring elements and have developed control and acquisition software. With the help of a computer, we can achieve automatic acquisition, automatic channel, automatic calculation, and report generation functions. The TR70B wall heat transfer coefficient inspection instrument adopts two channel types, 32 channel and 64 channel. The heat flow meter and temperature sensor can be freely switched, making matching more convenient and achieving higher efficiency at the same time.Heat transfer coefficient of enclosure structure

　　Technical parameters of heat transfer coefficient detector for building envelope structure：

1. Temperature measurement range: -100.00~+100.00 ℃, measurement accuracy: ± 0.5 ℃, resolution: 0.1 ℃, heat flow range: 0.3~200.00 mV;

2. Acquisition speed: 200ms/channel, parameter dependent;

3. Collection accuracy: Pt1000 basic error less than ± 0.1 ℃, heat flux: ± 0.1 mV;

4. Number of channels: 32 temperature and heat flow channels can be freely switched

5. Working environment: temperature: -20 ℃~50 ℃, humidity: less than 90% R · H;

6. Output relay contact capacity: AC 250V 2A (resistive load);

7. Specification: Length 420 x Width 320 x Height 170 mm;

8. Weight: 7kg;

9. Power supply: AC220V 100W;

　　Heat transfer coefficient of enclosure structureProduct Features

1. Using platinum resistors as temperature sensing elements, with high accuracy and good stability; Adopting TFT LCD screen display;

2. 3 types of alarms, 2-point common alarm relay output;

3. Each input channel is equipped with surge and overvoltage protection, and unused channels can be closed at will;

4. Strict anti-interference design, suppressing fast pulse group interference and other electromagnetic interference generated by relays, contactors, etc. on site, with anti-interference ability reaching level III;

5. Automatic compensation for time drift and temperature drift;

6. Each channel independently sets a digital filtering time constant to improve display stability, and each channel independently sets zero and full-scale correction to improve system measurement accuracy;

7. The measurement and control software can be used for both heat flow meter detection and calibration hot box detection.