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| Brand Name: | Gold |
| Model Number: | GD-ISO 12567 |
| MOQ: | 1 |
| Price: | negotiation |
| Delivery Time: | 60 works days |
| Payment Terms: | L/C,D/A,D/P,T/T |
The Thermal Insulation Performance Testing Equipment for Doors and Windows is independently developed by our company in accordance with the latest national standard GB/T 8484-2020 Test Method for Thermal Insulation Performance of Exterior Building Doors and Windows (officially implemented on March 1, 2021), combined with our years of practical experience in equipment design and manufacturing. It is applicable for testing the heat transfer coefficient and anti-dewing factor performance of various exterior building doors and windows.
In component selection and system design, we adhere to the principle of safety and stability and focus on the accuracy of system testing. The equipment adopts a computer automatic control system with a unique control algorithm, featuring high control precision, stability and reliability. The entire control process is fully automated by the computer, and test results as well as original record reports can be generated and printed.
This testing equipment is manufactured in compliance with GB/T 8484-2020 Classification and Test Method for Thermal Insulation Performance of Exterior Building Doors and Windows, which is theoretically based on the calibrated hot box method specified in GB/T 13475-2008 Thermal insulation - Determination of steady-state thermal transmission properties - Calibrated and guarded hot box methods. Based on the one-dimensional steady-state heat transfer principle, it simulates the heat transfer condition of exterior window components in winter by placing the components between two chambers with different temperature fields. The hot box simulates the indoor air temperature field and radiation conditions, while the cold box simulates the outdoor air temperature field, wind speed and radiation conditions. After several hours of operation, the entire device reaches a stable state with a steady temperature field and velocity field. The heat transfer coefficients of the window specimen, window frame specimen and glass can be calculated by measuring key parameters such as the air temperature on both sides of the specimen, heat loss of the hot box outer wall and specimen frame, metering area of the specimen, and electric heater power input into the hot box.
•ISO 12567-1 Thermal performance of windows and doors — Determination of thermal transmittance by the hot-box method — Part 1: Complete windows and doors.
•GB/T 8484-2020 Test method for thermal insulating performance for building exterior doors and windows.
4.1 Main Performance Parameters
1. Hot chamber temperature control range: Arbitrary setting within 10～50℃
Measurement accuracy: 0.2℃
Temperature control fluctuation range: 0.01～0.1℃
2. Cold chamber temperature control range: Arbitrary setting within -10～-21℃
Measurement accuracy: 0.2℃
Temperature control fluctuation range: 0.01～0.2℃
3. Hot chamber power measurement and control range: 10～1100W, Accuracy: Class 0.5
4. Hot chamber steady-state power fluctuation range: ≤0.2～1W
5. Testing efficiency:
(1) Intermittent specimen testing: Total time for testing one specimen intermittently: about 8～10 hours/piece
(2) Continuous specimen testing: Total time for testing the same or different specimens continuously: about 7～9 hours/piece
6. Hemispherical emissivity:
The surfaces of the chamber and cold chamber guide plate adopt non-hygroscopic, corrosion-resistant color steel plates coated with milky white paint, with a hemispherical emissivity of over 0.93;
The hot chamber guide plate is made of PVC material with white double sides, with a hemispherical emissivity of over 0.92.
Note: The hemispherical emissivity of white object surfaces can all reach over 0.9.
7. Maximum dimension of exterior door/window specimen: 1800×2100 mm
8. Opening dimension: 2200×2500 mm
9. Overall dimension of equipment: Length×Width×Height (mm) = 3900×3300×3800
10. Installation and usage space for equipment: Length×Width×Height (mm) = 4900×4800×4300
11. Power supply: AC 380V, Power ≤9kW, Three-phase five-wire system
4.2 Key Points of the Testing System
(1) The environmental chamber adopts a new type of thermal insulation material - polyurethane sandwich color steel plate with hook lock connection and one-time compression molding. It has the advantages of excellent thermal insulation performance, non-aging, non-deformation, corrosion resistance, and easy disassembly and assembly. The thermal conductivity of polyurethane material is 0.020 W/(m·K), saving more than 35% energy compared with EPS board.
(2) Independently developed high-precision acquisition and control modules are adopted to realize accurate signal acquisition, I/O output and D/A conversion, with anti-electromagnetic interference capability to eliminate testing errors caused by electromagnetic interference.
(3) DC power regulation is adopted, with power measurement accuracy ≤2% and test repeatability ≤5%.
(4) Imported digital temperature sensors with advanced and high-quality temperature sensing elements are used to improve the measurement accuracy and ensure the stable and reliable operation of the system:
a. High precision: Total measurement error <0.5℃ within -30℃~35℃; Measurement resolution: 0.0625℃; Repeat accuracy <0.1℃.
b. Low power consumption: Standby power consumption of temperature sensor <0.005mW; Average power consumption of temperature conversion <0.01mW.
c. High sensitivity, stable performance, no loss and long service life.
(5) The system is standard equipped with 152 temperature sensors in a bus configuration, allowing for convenient addition or replacement of sensors.
(6) Specimen sensors, specimen frame sensors and filling plate sensors are uniformly numbered for free selection and use by users as required.
(7) Compared with similar domestic products, it has a shorter test cycle, reduced power consumption and lower inspection cost. The test for door and window heat transfer coefficient takes 8～10 hours.
(8) The independently developed measurement and control software with a human-machine interface is adopted, which is flexible and convenient, greatly reducing the work intensity and difficulty of test personnel, and truly realizing long-time unattended operation with one-click full automatic control.
(9) Real-time and historical temperature curve monitoring and storage, which can be retrieved at any time to visually observe the dynamic temperature changes of the hot chamber, cold chamber and environmental chamber.
(10) The test records are stored throughout the test process, and the test data can be viewed and printed at any time after the test.
(11) The upper computer software is more humanized with an elegant interface and simple operation. The original test records and reports can be imported into Office software for seamless connection, and the report template format can be independently modified by customers.
(12) The overall design has the advantages of wide adaptability, simple operation, stable performance, high control precision and low comprehensive noise.
(13) The hot and cold chambers can be opened simultaneously, facilitating specimen installation and sensor arrangement, avoiding cold and heat exchange and chamber frost crack caused by specimen access through the cold chamber.
(14) Refrigeration: Copeland high-end compression unit is adopted, featuring high refrigeration efficiency, low failure rate and stable year-round operation.
1. Temperature control system: Adopts DC power regulation PID control.
The computer output signal controls the corresponding executive components through I/O and D/A conversion to realize temperature control, calculation, temperature acquisition, test report printing, process curve display and other functions.
The human-machine dialogue window can display the temperature value of each point one by one and has a self-diagnosis function: if any temperature probe fails, the computer can automatically eliminate the impact of the faulty point, display its location, and not affect the normal progress of the entire test process.
The independently developed temperature acquisition module is adopted with anti-electromagnetic interference capability for more accurate and reliable data acquisition.
(1) Number of temperature point arrangements:
a. Hot chamber (99 points in total):
Inner surface: 9 points on each wall, 45 points for 5 walls;
Hot chamber space (between the guide screen and the specimen): Divided into upper, middle and lower layers, 3 points per layer, 9 points in total;
Outer surface: 9 points on each wall corresponding to the inner surface, 45 points for 5 walls.
b. Specimen frame (48 points in total):
Hot side surface: 24 uniformly distributed points;
Cold side surface: 24 uniformly distributed points.
c. Exterior window specimen (14 points in total):
Hot side surface: 14 points for detecting the surface temperature and frosting of the specimen frame during heat transfer coefficient testing.
d. Filling plate around the exterior window specimen (18 points in total):
Hot surface: 9 uniformly distributed points (also used for anti-dewing factor point arrangement);
Cold surface: 9 uniformly distributed points.
e. Cold chamber space (9 points in total):
Divided into upper, middle and lower layers, 3 points per layer, 9 points in total.
Total: 188 points
(2) Temperature point arrangement technology:
a. Space temperature point arrangement:
Adopts American DALLASS integrated digital temperature sensors;
Diode sleeves are used as thermal radiation shields.
b. Temperature point arrangement for the test surface of exterior window specimens (or standard specimens during calibration) and filling plates around the specimens:
Adopts American surface-mounted DALLASS integrated digital temperature sensors;
All probe parts are pasted on the corresponding test surfaces with tinfoil adhesive paper.
c. Temperature point arrangement for the test chamber surfaces (inner and outer surfaces of the hot chamber outer wall, hot and cold surfaces of the specimen frame):
Adopts American DALLASS integrated digital temperature sensors;
All probe parts are pasted on the corresponding test surfaces with tinfoil adhesive paper, and the lead wires are fastened in the wire troughs.
2. Electric cabinet: Realizes the conversion between strong and weak current of the microcomputer system and executive components, and is equipped with corresponding switch buttons.
3. Cold chamber: Its function is to form a stable and uniform temperature field and wind speed field lower than that of the hot chamber on the other side of the specimen, so as to form a constant temperature difference on both sides of the specimen. It consists of five chamber walls, a refrigeration evaporator, a guide screen, an electric heater, a cold air fan and an air temperature sensor.
(1) Material: Made of polyurethane color steel plate;
(2) Inner cavity dimension: 1300×2400×2700 mm;
(3) Structural features: The integrated structure of evaporator, air heating pipe, axial flow fan and accumulated water discharge pipeline not only improves the temperature control precision and stability, but also facilitates equipment maintenance and saves usage space. A stepless speed regulation fan is adopted to fully meet the wind speed requirements of the new standard.
4. Refrigeration unit:
Since the refrigeration system is greatly affected by the ambient temperature and the specifications of door and window specimens, the refrigeration power is determined only according to the test requirements of the minimum temperature and considering the cooling rate. A 5P Copeland refrigeration compression unit is adopted, which can reduce the cold chamber temperature to -22℃ within 50～90 minutes. The shunt refrigeration control technology is used to expand the multi-working condition operation range (-10℃～-21℃) of a single refrigeration unit. This type of refrigeration unit is energy-saving and low-noise, with multiple self-diagnosis protection functions such as overpressure, overheating and low-temperature start, thus achieving lifelong maintenance-free and long-term trouble-free continuous operation in any natural environment.
5. Hot chamber:
(1) Material: Made of 150mm-thick polyurethane sandwich color steel plate;
(2) Inner cavity dimension: 2000×2400×2700 mm;
(3) Main components: It is used to simulate and maintain a constant indoor thermal environment on the hot side of the specimen, consisting of five chamber walls, an electric heater, inner and outer surface temperature sensors, an air temperature sensor and lighting lamps;
(4) Structural features: A thermal insulation door is set on the side of the hot chamber, through which the specimen can be easily put into the hot chamber and placed in the specimen frame. A special electric heater is adopted to avoid excessive temperature fluctuation caused by other electric heating elements with strong thermal inertia.
6. Specimen frame:
(1) Material: Made of 300mm-thick polyurethane sandwich color steel plate (bulk density 40kg/m³);
(2) Opening dimension: 2200×2500 mm;
(3) Structural features: Adopts on-site installation and is integrated with the hot and cold chambers to avoid the influence of heat and cold bridges and improve the thermal insulation effect of the equipment.
7. External environment system: 1 or 2 sets of 1.5P DC inverter air conditioners are used to ensure the temperature fluctuation within ±0.5℃.
(This system is prepared by the user)
