What is

Biomimetic Technology?

Biomimicry is the emulation of various models and systems found in nature for the purpose of solving complex human problems. At Bimitech we call this biomimetic technology. Learn more at the Biomimicry Institute.

The Hummingbird

Lessons from the world’s most efficient flyer

After millions of years selection and evolution, flyers like hummingbirds and insects have evolved to have a near perfect system of flight and aerodynamic efficiency. Research has found that most hummingbirds are about 25% more efficient than the best drones developed to date.

Unlike any other bird’s wings, hummingbirds flap their wings in much the same way as insects do. This means their wings rotate around their long axis during transitions between upstrokes and downstrokes. This design enables their hyper-efficient displacement of air. 

Introduction to

Biomimetic Cooling

The core innovation of Bimitech’s biomimetic cooling technology is the introduction of a flapping membrane, or biomimetic “wing”. 

Biomimetic piezo actuator cooling fan flow

Existing Inefficiencies

Current problems facing traditional rotary fan-based cooling solutions

Heavy

Due to copper motors and stators.

Inefficient

Overall efficiency is about 30%.

Unreliable

2-3 year lifespan. Require maintenance.

Noisy

High RPM creates high frequency noise levels.

Biomimetic Cooling's

Key Advantages

High Efficiency

Computational Fluid Dynamics (CFD) simulations in conjunction with experimental measurements have been used to optimize various design parameters such as size, aspect ratio and angle of attack. “Clap and fling” flow rate mechanisms have also been investigated ensuring the fan has the highest aerodynamic efficiency. Additionally, energy loss has been minimized due to the lack of friction from traditionally used ball bearings. The fan is powered by a piezo actuator with high electrical-mechanical energy conversion. The piezo actuator generates almost zero heat during operation, allowing the fan to achieve up to 2x more overall efficiency. 

Optimized

Uniform Flow Profile

Removing the “dead air zone”

Rotary Fan

A typical rotary fan has a hub at its center where the motor resides and which the blades rotate around. This creates a “dead air zone” in the center of the fan without any air flow, resulting in the hottest region of the heat sink in many applications. 

Biomimetic Fan

In our biomimetic fans, the air profile is uniform due to the single flapping wing design. This results in no “dead air zone”. The design can be further customized higher air flow velocity and better efficiency. 

Quiet

Our biomimetic fans contain no motors, which result in no motor-generated noise. In a traditional rotary fan, noise pitch is principally proportional to the number of blades present. As the biomimetic fan contains only a single “blade” (wing), the frequency of the noise generated is lower, resulting in a lower tone of noise. This lower tone noise is more comfortable to the human ear. 

Other

Additional Advantages

Removing the “dead air zone”

Reliable

Unlike a traditional rotary fan, the biomimetic fan consists of only a few simple components. There are no moving parts, no bearings, oil leakages or maintenance required. It is powered by our ultra reliable Python actuator.

Fan efficiency

Lightweight

Designed with aerospace grade lightweight materials, there are no heavy copper coils or motors present in our biomimetic fans. This makes the biomimetic fan up to 5x lighter than a traditional rotary fan of similar cooling capacity.

Fan form factor

Customizable

Our biomimetic fan does not require the restrictive round format present in rotary fans. Its shape can be flexibly customized to fit specific applications and optimized according to the required form factor. In addition, multiple fans can be used in parallel.

Thermal Solution

Comparative Analysis

with other commercial cooling solutions

Bimitech Inc.

San Jose, CA 95123 USA

contact@bimitech.com

+1 408 490 0945

 

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