Photovoltaic module dust and sand blowing test chamber

Dimensions (approximately)

Approximately 6500 × 2400 × 3400 mm (W × H × D) (subject to actual dimensions)

temperature range

RT ± 10-70 ℃ (adjustable) RT refers to room temperature

Fine dust

Below 75um

Coarse dust

Below 150um

humidity range

Humidity range ≤ 30% RH (humidity) display is not adjustable

Horizontal dust and sand blowing velocity

1.5-29m/s (adjustable)

dust blowing

concentration

The dust concentration inside the box and pipeline is 10.6g±7

Dust blowing speed

1.5～8.9m/s

Sand blowing concentration

Sand blowing concentration

For equipment that may work near helicopters flying over unpaved roads: 2.2 ±

0.5g/m3;

2. Will not be used or exposed near flying aircraft, but may be unprotected while operating ground vehicles

Equipment working or stored near the vehicle: 1.1 ± 0.3g/m3;

For equipment that is only affected by natural conditions 0.18±0.15g/m3

Due to low concentration measurements

It's quite difficult, so there's a big margin of error here.

Sand blowing speed

18m/s~29m/s

Sand blowing time

90min

Sample preservation

After taking out the sample, blow off the sand on the surface of the sample with wind, then rinse it with distilled water and let it dry in a natural environment.

airflow velocity

When using according to the diagram When using a dust collection chamber, the density of the air/dust mixture should be (52) g/m, and a flow rate of 1 m/s should be maintained according to IEC 60068-2-68 (unless otherwise agreed).

Hua stone powder dosage

2-5kg/m ³ (equipped with 25kg)

meet the standard

IEC 61300-2-27

GJB 150.12A-2009

GB/T 2423.37-2006 Test Methods

power supply

380V ± 10% V (three-phase five wire, separately make an 80A air switch, the air switch should have wiring terminals, and the power cord should be over 10 square meters)

Pollution, electromagnetic radiation

Must comply with relevant standard requirements

Test steps

process 1

Measure the photovoltaic transmittance before the experiment and calculate the average photovoltaic transmittance of each sample.

process 2

Place the coated surface of the sample towards the direction of sand and dust blowing, and maintain a 45 ° angle with the horizontal plane during installation. Conduct experiments in three stages: blowing dust, blowing sand, and reducing dust.

a) Dust blowing stage: Maintain a dust blowing test concentration of 10.6g/m+7gm and a dust blowing speed of 8.9m/s. Conduct a 6-hour dust blowing test at 23 ℃, followed by a 6-hour high-temperature storage or high-temperature working dust blowing test at 60 ℃.

b) Sand blowing stage: Blow sand at a high temperature of 60 ℃, with a sand blowing concentration of 1.1g/m ± 0.3g/m 'or 2.2g/m ± 0.5cm, a sand blowing speed of 18m/s~29 m/s, and a sand blowing time of 180 min and 300 min.

c) Dust reduction stage: The test temperature is controlled at 23 ℃ ± 2 ℃, the dust settling rate is 6g/(m '· d), and the test time is 3 days.

process 3

After the test is completed, take out the sample, clean the surface of the sample with deionized water and anhydrous ethanol, and let it dry for at least 4 hours in an environment with a temperature of 23 ℃ ± 2 ℃ and a relative humidity of 50 ± 5%. Observe the condition of the sample film layer, measure the photovoltaic transmittance again, and calculate the attenuation of the average photovoltaic transmittance of each sample.

Box structure characteristics

structural approach

1. The bottom of the chamber is funnel-shaped, and the bottom shaking dust motor assists in the recovery of dust

2. The test chamber is approximately cubic, and its side length in the cross-section of the airflow is at least the same as the cross-section of the sample perpendicular to the airflow direction

The maximum value of the vertical or horizontal edge length of a surface Triple, the test chamber has heating function;

3. The test box has a pre-treatment box, and two boxes have the same airflow cross-section. Air deflectors are installed behind the entrance of the airflow channel leading to the front box to generate horizontal laminar airflow through an overall arrangement. A blower device for generating airflow is arranged behind the test box to extract air from the test box and send it into the pre-treatment box through the airflow channel; External dust blowing device, connected by air ducts

Outer wall material

premium SUS304 stainless steel

Inner box material

SUS304 stainless steel.Size is The 300mmX300mm sample is the sample, with a quantity of 3 pieces

observation window

There is a large observation on the box door

air duct

The unique Te air duct design ensures the concentration of laminar airflow generated by the box

basic structure

Pre treatment box, test box, suction port, dust collection box, circulating dust blowing device, vacuum system, dust storage tank

Composed of flow valve, heating system, reverse flow blade, sample turntable, protective mesh, concentration meter dust return pipe, etc.

observation window

There is a gate with 1 observation window, resistance film heating anti frost observation window

lighting

The top of the studio is equipped with LED strong light illumination, projected into the studio through the transparent window on the top of the box; Independent switch control;

control system

touch screen

PLC and touch screen intelligent control system (independently developed)

concentration meter

Using analog control signals to transmit PLC module for precise control

Real time monitoring of dust concentration, automatic replenishment of dust if the amount is insufficient

heating system

316 stainless steel heating wire

Vacuum pumping system

Pressure regulating valve, suction nozzle, pressure regulating three piece set, connecting pipe, vacuum pump

controller

Adopting a programmable controller (this controller has various control functions with arbitrary settings)

a. Dust blowing time (stop, blow) h/m/s adjustable

b. Cycle period: arbitrarily adjustable

c. Pre set test time: 0s to 999h99m99s, adjustable at any time

d. Power on: off on off

Metal mesh size

Nominal wire diameter 50um， The nominal spacing between lines is 75um

hair dryer

All plastic centrifugal fan

The control box and test box are integrated

1. The bottom of the chamber is funnel-shaped, and the bottom shaking dust motor assists in the recovery of dust

2. The test chamber is approximately cubic, and its side length in the cross-section of the airflow is at least three times the maximum vertical or horizontal side length of the sample cross-section perpendicular to the airflow direction. The test chamber has a heating function;

3. The test box has a pre-treatment box, and two boxes have the same airflow cross-section. Air deflectors are installed behind the entrance of the airflow channel leading to the front box to generate horizontal laminar airflow through an overall arrangement. A blower device for generating airflow is arranged behind the test box to extract air from the test box and send it into the pre-treatment box through the airflow channel; External dust blowing device, connected by air ducts

Safety protection function

1

Reliable grounding protection device

2

Leakage/circuit breaker protection;

3

Heater short circuit protection;

4

Overload protection for blower motor;

5

Studio independent overheating, sound and light alarm;

6

Power undervoltage, overvoltage, and phase loss protection