GRA
Well-known member
Via GCC (mentioned in a previous post):
http://www.greencarcongress.com/2015/12/20151217-hystep.htmlDOE’s HyStEP device will accelerate hydrogen refueling station commissioning
. . . The primary purpose of the HyStEP Device is to be used by a certification agency to measure the performance of hydrogen dispensers with respect to the required fueling protocol standard. Specifically, the device has been designed to carry out the test methods of CSA HGV 4.3 to measure that stations follow the fueling protocols standard SAE J2601-2014 including IrDA communications per SAE J2799.
The HyStEP Device includes three Type IV 70 MPa tanks capable of storing a total of 9 kg H2 that are instrumented with pressure and temperature sensors. The tanks are connected to a 70 MPa receptacle equipped with pressure and temperature sensors as well as IrDA communications integrated with a data acquisition, analysis, and control system.
A valve near the receptacle attached to a vent manifold can be used to both simulate a leak for fault detection tests and for controlled defueling. A nitrogen purge system is also included. Additional temperature sensors record ambient temperature near the receptacle and various external system temperatures.
The HyStEP Device is capable of performing key tests defined in CSA HGV 4.3. These include IrDA communication tests, fault detection tests, and communication and non-communication fills at 35 and 70 MPa. . . .
The current practice of commissioning hydrogen refueling stations is slow because each automotive manufacturer performs its own validation tests to measure the performance of hydrogen dispensers with respect to fueling protocol standards. Each test takes one to two weeks, so commissioning can take months.
HyStEP acts as a surrogate for vehicles, eliminating the need for each automotive manufacturer to test separately. HyStEP is equipped with modular tanks and all of the instrumentation that automotive manufacturers would use in performing their own tests.
—Sandia mechanical engineer Terry Johnson, project lead for HyStEP
- HyStEP addresses the two primary concerns of automotive manufacturers: keeping their testing data proprietary and ensuring the performance of the hydrogen dispenser.
Since automotive manufacturers must trust the device’s ability to provide the same results they’d achieve with their own test vehicles, manufacturers needed to be involved from the start. In addition to Sandia and NREL, the project team included Air Liquide, Boyd Hydrogen, the California Air Resources Board and Toyota Motor Corp.
HyStEP recently underwent validation testing at NREL’s Energy Systems Integration Facility in Golden, Colorado, and is now undergoing pre-deployment testing at refueling stations at California State University Los Angeles and the South Coast Air Quality Management District headquarters. Early in 2016, the Air Resources Board in collaboration with other state agencies will begin using HyStEP to support the commissioning of new stations. Additional automotive manufacturers, including Daimler AG, BMW and Honda, are contributing to that effort.
HyStEP will help California meet its ambitious goal of commissioning up to 35 new refueling stations by the end of 2016—one new station every one to two weeks. The target is a hydrogen-refueling network of more than 50 retail stations in this timeframe, primarily in the Los Angeles metro area, Orange County and the Bay Area. . . .