The following is an acoustic demonstration of Boyd's innovative air mover technology: The DWDI blower as compared to a traditional dual axial fan. The demonstration units simulate a 1U and 2U enclosure with a straight-through airflow configuration airflow.

Restrictions were set inside the enclosures so that both devices operate at the same airflow and pressure points as tested in our aerodynamics lab.

40mm measurements: 40 x 40 x 56 mm, representing a 1U server rack height.

(First sound) Axial Fan 40mm High Mode

(Second sound) Blower 40mm High Mode

Boyd's DWDI blower can reduce overall noise by four to as much as 12 decibels compared to a dual axial fan and depending on the system. Tonality is also much lower with Boyd's DWDI blower.

80mm measurements: 80 x 80 x 80 mm

(Third sound) Axial Fan 80 mm High Mode

(Fourth sound) Blower 80 mm High Mode

Results are consistent to the 40 millimeter version. Boyd's DWDI blower can reduce overall noise by 5 to as much as 12 decibels with much lower tonality. The acoustic advantages of Boyd's DWDI blower help our customers meet industry acoustic requirements such as NEBS. We've also shown great advantages in reducing airborne vibration to improve quality and reliability in systems like hard disk drives and storage applications.

We look forward to working with you to provide more information and to solve your system air cooling needs.

Two Phase Enhanced Air Cooling for Power Electronics

Heat Sink Base- access additional fin surface area for increased, high efficiency heat transfer from sources such as electronic devices.

Aluminum Skived Fin- one-piece construction has no base-to-fin thermal resistance and maximum cooling surface area with thinner fins and tighter pitch to dissipate more heat in a compact space.

IGBT (Heat Source)- extend air cooling innovation to enable higher performance and increase power density before transitioning to liquid cooling systems.

Vapor Chamber- spread heat quickly from high heat flux components over large areas to optimize cooling fin efficiency and maximize performance.

Two-phase enhanced air cooling enables higher heat capacity, less airflow, and more efficient energy use in compact air-cooled solutions for high power devices.

Boyd Corporation

Boyd’s DWDI blowers provide a lot of cooling airflow in a small package and were developed to air-cool densely populated electronics where low noise and vibration are critical requirements. Competing dual axial counter-rotating fans operate significantly louder with more airborne vibration and ear-piercing tones.

Axial Fan vs DWDI Blower 40 mm High Mode

This is a demo unit that contains both the 40mm DWDI blower and a competing 40mm dual axial fan

40 mm measurements: 40x40x56mm, representing a 1U server rack height

(First sound) Axial Fan 40mm High Mode

(Second sound) Blower 40mm High Mode

The 40mm DWDI blower operates at about 4-8 dBA lower than the axial fan and with much lower tonality.

Axial Fan vs DWDI Blower 80 mm High Mode

This is a demo unit that contains both the 80mm DWDI blower and a competing 80mm dual axial fan

80 mm measurements: 80x80x80 mm

(Third sound) Axial Fan 80 mm High Mode

(Fourth sound) Blower 80 mm High Mode

The 80 mm DWDI blower operates at about 5-9 dBA lower than the axial fan and with much lower tonality.

Customers have seen overall sound power reductions of 6-12 dBA with Boyd’s DDI blower vs. Competing dual axial fans.

Advantages- Reduced airborne vibration for sensitive systems like hard disk drive storage. Axial fan efficiency matched with good application engineering and system design implementation. Good performance in straight through airflow configurations with sidewalls close to blower inlets.

Boyd Corporation, One Company, Many Solutions

Two-Phase Enhanced Air Cooling extends the performance range of air by dissipating more power in a compact size, delaying the transition to liquid cooling as power levels increase.

Heat enters through high performance thermal interface materials to maximize heat transfer from the heat source to the heat sink base.

Evaporation condensation heat spreading moves heat over large distances with minimal temperature drop for creating design flexibility to optimize heat source layout, while cooling remotely weathers better access to airflow.

Fluid evaporates at the base plate and travels through heat pipes that are 100x more thermally efficient than copper or aluminum, condensing at the remote cooling region to release heat into fins.

Condensed fluid flows back to the evaporator though a wake, even against gravity to continuously repeat the heat transfer process with no moving parts for greater system reliability.

Fans pull hot air from the fins so they can absorb more heat. Two phase enhanced air cooling enables higher heat capacity, less airflow, and more efficient energy use in compact thermal management solutions for cooler components in high power devices.