The goal of this challenge is to design a water trap that can remove moisture from the hydrogen stream of anion exchange membrane (AEM) electrolyser in a continuous process.
Enapter is the only manufacturer of the anion exchange membrane (AEM) electrolyser. The standardized modular AEM electrolyser can produce 500 NL of green hydrogen per hour from water and renewable energy source. The core of the device, the AEM stack, consists of two half-cells
separated by an AEM. During the electrolysis process, the electrolyte (potassium hydroxide solution) circulates through the anode half-cell at ambient pressure, while hydrogen is produced in the cathode half-cell at a pressure of 35 bar. The separate half-cell design allows the AEM electrolyser to produce hydrogen with a high purity. The main impurity of the hydrogen from the AEM stack is 12000 ppm of water. For the principle of AEM electrolysis see: https://www.enapter.com/aem-water-electrolysis-how-it-works.
To meet the requirement of common hydrogen fuel cells, the water content in the hydrogen needs to be reduced from 12000 ppm to 10 ppm. Enapter’s current AEM electrolyser model EL 2.1 has a water trap (see images below) on the hydrogen pipeline, which can reduce the moisture in the hydrogen produced by the AEM stack from 12000 ppm to 1000 ppm via simple condensation. The water is accumulated in the water trap during hydrogen production and periodically released to the
purge line. The remaining 1000 ppm of water in the hydrogen output of the EL 2.1 is later removed in
a separate dryer module (DRY 2.1) with moisture absorption beads. When the beads become
saturated with water, they need to be regenerated by heating and drying.
Enapter is challenging the GrabCAD Community to design the water trap for the AEM electrolyser that can remove as much moisture as possible from the hydrogen without manual maintenance. The performance of the new water trap should be better than the current design, which is 1000 ppm of water in the hydrogen output. The goal is to have a hydrogen output from the AEM electrolyser that can be fed to fuel cells directly, which requires a water content of 10 ppm or less. In this way, we may eventually eliminate the dryer from the hydrogen generation system, making the system more compact and efficient. For maximizing the energy efficiency of the system, the water trap design should consume as little power as possible.
The temperature of hydrogen stream flowing into the water trap: 55 °C
Ambient temperature of the water trap inside the AEM electrolyser: 30 °C
Flow rate of the hydrogen: 500 NL/h
Pressure of the hydrogen: 35 bar
Water content of the hydrogen input: 12000 ppm (vol.)
Target water content of the hydrogen output: less than 1000 ppm (vol.), aiming for 10 ppm (vol.)
Specifications process connection: in and out both ¼’’ stainless steel pipes
Dimension of the current water trap design: ø26x124 mm
Specific dimensions can be found in the pipeline CAD file of the current water trap. Download the Stp file here!
The design will be judged on the amount of water that it can potentially remove.
The water trap should be free from manual maintenance, and regular maintenance should be performed via the build-in program. It should support a continuous process of hydrogen production.
The dimension of the water trap should be minimized. A target size of <26*80*160 mm (the available space in the current model of EL 2.1) is preferred.
The design should maximize the overall energy efficiency of the AEM electrolyser by minimizing any additional power input.
The design should minimize the loss of hydrogen during water removal.
The water trap should be suitable for low-cost mass manufacture.
The water trap should be at least as reliable and robust as our electrolyser system, meaning a lifetime of 10-20 years.
Specifications for file submission
A brief but clear description of the working principle and rationale of your water trap design should be submitted together in PDF format.
Renderings: renderings are not mandatory, but they can earn bonus points from the jury.
Any supplementary documents should be in PDF format.
If the files are zipped, the file compression should be compatible with Windows 10 and should not require any special software to unzip.
Download The stp file below
ENTERING THE COMPETITION:
SUBMITTING AN ENTRY
AWARDING THE WINNERS
The sum of the Awards is the total gross amount of the reward. The awarded participant is solely liable for the payment of all taxes, duties, and other similar measures if imposed on the reward pursuant to the legislation of the country of his/her residence, domicile, citizenship, workplace, or any other criterion of similar nature. Only 1 award per person. Prizes may not be transferred or exchanged. All winners will be contacted by the GrabCAD staff to get their contact information and any other information needed to get the prize to them. Payment of cash awards is made through PayPal. All team awards will be transferred to the member who entered the Challenge.
We will release the finalists before the announcement of the winners to give the Community an opportunity to share their favorites in the comments, discuss concerns, and allow time for any testing or analysis by the Jury. The Jury will take the feedback into consideration when picking the winners.
Up to $2000 in Prizes
Green hydrogen is the oil of the 21st century. Enapter designs and builds one of the most efficient electrolysers for green hydrogen production. We strive to make electrolysers a commodity - a modular and scalable product just like the solar panel. Our product is demonstrated and readily available in the market. We are currently scaling production to deliver low-cost devices that will produce hydrogen for industrial and commercial purposes, energy storage, transport, or fuel for heating.
The energy sector is slow to respond to digital change. We believe successful energy players of the future think energy in terms of hardware and software being inseparable. With a strong background in software in our team, we use this opportunity: Enapter’s software-defined Energy Management System (EMS) is a decentralized energy system controller. It is capable to configure, control and monitor energy systems and as well as individual (hydrogen) components. Our approach is to build the EMS as an operating system for any energy system that offers core functionality and can easily be built upon to accommodate for individual needs via open collaboration tools.
Our goal at Enapter is to make green hydrogen cheaper than fossil fuels. Find a brief overview here.
Find more about us here: https://www.enapter.com/