Pump

Electromagnetic pumps have been used for decades and have been seen in a variety of high tech applications. From space crafts and satellites to nuclear-driven submarines and land based nuclear reactors. They have also been used in various industrial cooling applications.

Typically electromagnetic pumps for cooling purposes have been used in applications where possible leeks needs to be totally eliminated or where unlimited MTBF needed to be ensured or a combination of these. Nuclear reactor cooling is a great example of this.

An electromagnetic pump has several advantages over typical mechanical pump designs. It contains no moving parts such as shafts or blades. Following this, it does not emit any noise or vibration. The lifetime of an electromagnetic pump is almost unlimited and there is no performance degrading over time.

Typically electromagnetic pumps have had the drawback of a high current requirement. This has been in the range from in the hundreds to even ten-thousands of amperes. In the environment where the electromagnetic pumps have been used, however this was not a major problem.

The high current requirement is caused by a handful of powerful physical phonemes occurring in the electromagnetic pump chambers. Many of these are actually greatly reducing the efficiency of electromagnetic pumps by its very nature. These phenomena's has been a major road block in many miniature electromagnetic pump designs studies in the past and a very limiting factor in using the technology in consumer products. 

This has also been a very tough challenge for Danamics as the current requirement needed to be reduced greatly. However the goal has been reached. Danamics has developed a unique, patent pending technology design which consists of a unique geometrical design method combined with high tech material science in order to counter or even reverse some of these phonemes.

The result is a several order of magnitude current reduction effect for the same liquid propulsion which further enables a dramatically scaling towards ultra low pump size. Due to the small size and low power requirements, Danamics pump designs makes a liquid metal cooler suitable for use in smaller applications such as home computers, workstations and even laptops.

The charts below shows an electromagnetic pump curve for a multistring device with five pump chambers in parallel and a total volume of 1,47 cm3. The device is using just below 1 W. The pump medium used is NaK 78 - the same as used by Danamics.

For comparison we have included a curve for a miniature centrifugal device which consumes 3.5W.

As it can be seen in the graphs above, the electromagnetic pump is able to deliver a very high flow-rate - even at a very low power-requirement. The high-flow is very important in a setup, where rapid removal of heat is necessary.