June 28, 2021 – Skyhaven Systems was awarded a contract from the Department of Energy to develop a hydrogen cooling system to support fuel cell vehicle hydrogen re-filling operations. The Department of Energy is soliciting advancements in the pre-cooling hydrogen at medium-and heavy-duty (MD/HD) filling stations. Hydrogen fuel cells for MD/HD vehicles have great potential in enabling high-power, long range, and zero emission operation. However, filling MD/HD vehicles requires a fill rate of up to 5 times faster than those of current fueling stations for light-duty (LD) vehicle fueling stations while still requiring the -40 °C pre-cooling temperature. Pre-cooling of hydrogen is necessary during the filling process because there is a significant increase in the vehicle tank temperature due to the Joule-Thompson effect. The main objective for this program is to develop a phase change material (PCM) heat exchanger to enable filling stations to meet the increased flowrate and cooling capacity demands associated with MD/HD vehicles. The PCM heat exchanger is being tested in a system composed of the phase change material (PCM) heat exchanger, a commercial low temperature chiller system, and a hydrogen-heat transfer fluid (HTF) heat exchanger.