Thermal Wind Tunnel

LW–9185-1500 Air Flow Rate and Pressure Measurement Apparatus

LW-9185-1500 thermal wind tunnel is a tool for fan performance rating. This machine is applicable to resistance and thermal test of systems, modules and components. Providing high-efficiency and user-friendly interface to help engineers develop and research better designs, manufactures and QC quality.

Apparatus Features

  1. Automatic system control and data acquisition by PC
  2. Nozzle’s flow rate report prior to delivery is issued by Long Win, which can be traced to an accredited lab for long-term trace-ability.

Based on following Standards:

• ISO 5801-2007
• AMCA 210-07
• ASHRAE 51-2007
• IEC 61591-2005
• GB/T 1236-2000

Experimental Items:

  1. Fan or fan tray’s PQ performance
  2. System Impedance Curve (SRC)
  3. Thermal Module’s RQ Performance

Principle

 

This apparatus is according to AMCA210-07 Standard structures. The air flow rate and pressure measurement methodology:

  1. Fan static pressure measurement:
    1. In Fig. 12 structure, the fan static pressure is the differential pressure between static pressure in PL7 and barometric pressure.
    2. In Fig. 15 structure, the fan static pressure is the differential pressure between total pressure in PL8 and barometric pressure.
  2. Flow rate measurement:
    • By Bernoulli equation, the velocity in nozzle is calculated from the air density and differential pressure between PL5 and PL6.

Nozzles and Airflow Rate Range

ModeNozzle Diameter mmMinimum Airflow Rate CFMMaximum Airflow Rate CFM
1104.07.4
2165.818.9
32615.449.8
44240.1130
56699321
62*66198642
7All Nozzle5601500

Finding Airflow Rate (Q):

 

 

 
 

Thermal Wind Tunnel Specifications

The thermal wind tunnel has 2-in-1 AMCA 210-07 structures including:

  • 6 sets of stainless steel settling devices
  • 9 nozzles made of aluminum alloy
  • 2 auxiliary axial blowers for supplying of air flow

Flow rate range: 4 CFM ~ 1500 CFM,

INFS: Indicated Nozzle Full Scale

The maximum airflow rate (1500 CFM) can reach at 0 mmAq.

 

Accuracy

10 mm nozzle4.7 ~ 7.4 CFM3.5% INFS
16 mm nozzle5.8 ~ 18.9 CFM3% INFS
26 mm nozzle15.4 ~ 49.8CFM2.5% INFS
42 mm nozzle40.1 ~130 CFM2% INFS
66 mm nozzle99 ~ 321 CFM2% INFS
2 x 66 mm nozzle198 ~ 642 CFM2% INFS
All nozzles560 ~ 1500 CFM2% INFS

Static Pressure: 0 ~ 150 mmAq

Cylinders that control sealing covers for nozzles.

Measurement Meters: with SGS Calibration Reports

  • Temperature: 0°C ~ 50°C; Accuracy ±0.5°C; Reading 0.1 °C
  • Pressure Transducers’ Accuracy: ±0.25%
    • The pipes for static pressure measurement are made of stainless steel
    • 4 Sets of Different Pressure Transducers:
      1. Static pressure fan P1: Range 0 ~ 12.7 mmAq
      2. Static pressure fan P2: Range 0 ~ 63.5 mmAq
      3. Static pressure fan P3: Range 0 ~ 254 mmAq
      4. Differential pressure of two sides of nozzles P56 (Dp): Range 0 ~ 127 mmAq
  • Atmosphere Pressure: one set of atmosphere pressure transducer, Range 450 ~ 825 mm Hg. Accuracy ±0.25%
  • DC Fan Voltage, Current, RPM Measurement:
    • Voltage: Accuracy ±0.5%, Range 0 ~ 100 V with 1 set digit display and RS485 interface
    • Current: Accuracy ±0.5%, Range 0 ~ 10 A with 1 digit display and RS485 interface
    • RPM: Accuracy ±1%, Range 100 ~ 99999 rpm, with a set of laser tachometer and digit display with RS-485 interface and can be switched with FG signal
  • Environment:
    • Ambient Temperature 4 ~ 40°C
    • Relative Humidity: <65% RH
    • Room Temperature avoid direct sunlight
    • Noise Reduction:
      • Max. noise is around 110 Db without noise reduction device
      • Max. noise is around 85 dB with noise reduction device on both sides of auxiliary fan
      • Total length increases 3 m and width increases 2 m with noise reduction devices
  • Overall Dimension:
    • Overall Dimension: 1.8 (W) x 5.6 (L) x 1.9 (H) m (Ref.)
    • Chamber Cross dimension: 0.96 (W) x 0.96 (H) m
    • Main Structure: 1.8 (W) x 3.0 (L) x 1.9 (H) m (Ref.)
    • Minimum Operation Space Required: 2.8 (W) x 9 (L) x 2.2 (H) m
    • Net Weight: 1300 kg (Ref.)
    • Movable Platform, 2 Sets: 1.2 (W) x 1.0 (L) x 0.73 (H) m

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