H2Tech - Electrolyzer Handbook 2022 - 112

2022 ELECTROLYZER HANDBOOK
PRODUCT CATEGORIES
COMPANY INDEX
PROTON EXCHANGE MEMBRANE (PEM) ELECTROLYZER
HyLYZER® Series
DESCRIPTION: Cummins' HyLYZER® uses state-of-the-art proton exchange
membrane (PEM) technology and provides highly efficient and compact plugand-play
solution for onsite hydrogen generation. The HyLYZER® system is
adaptive to continuous or flexible hydrogen production in both indoor and outdoor
environments. The Cummins' systems connect to standard power and water
connections and come equipped with standard water purification, power conditions,
hydrogen purification and remote servicing options. Operating flexibly at higher
current densities, HyLYZER® can be applied to projects where dynamic operation
is valuable, such as in combination with renewables.
Efficiency values for Cummins' electrolyzer products are expressed at the
product boundaries, at rated pressure, nameplate capacity, hydrogen purity and at
the beginning of life. Cummins' electrolyzer efficiency degrades by less than 1%/yr
(assuming 8,500 hr of annual operation). After 80,000 hr, stacks can be easily
refurbished to as-new efficiency.
Large MW scale plans include:
* Central water purification system: Converts tap water into clean deionized
water suitable for the cell stacks.
* Electrical substation: Transformer and switchgear, where high voltage
from the grid is converted to medium voltage AC.
* Rectifier and transformer: Medium voltage AC is converted into DC power
for the cell stacks.
* Electrolyzer system: Breaks water molecules into hydrogen gas and oxygen
gas, separated from water in gas-liquid separators. Enclosed, monitored
and 1-2-3-4 ventilated hydrogen production means building does not need
to be classified as a hazardous area. The result: 99.99% pure hydrogen
produced at 30 bar.
* Optional hydrogen purification system: If required, hydrogen can be
further purified to fuel cell quality (99.998%).
* Central cooling system: Cools water circulating through the cell stacks
to optimize electrolysis efficiency. Control room centralized plant logic
and safety control system
Continued 
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ADVANTAGES/KEY FEATURES:
* MW scale stacks: 2.5-MW scale stacks, modular design scalable
for larger demands.
* Compact design: Lower land, site preparation and building costs
and shorter installation time.
* Responsive: Fast responses to changes in hydrogen demand or power input
* Pressurized stacks: High output pressure (30 bar) without compressors.
* Long, maintenance-free lifecycle: Limited and optimized maintenance,
minimal degradation, 80,000 hr between stack membrane refurbishments
and fast stack swap-out when required.
* High efficiency and advanced control systems: Low power usage
and low annual maintenance costs, with integrated safety sensors
for safe plant operations.
* Leading operational expense and low levelized cost of hydrogen.
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H2Tech - Electrolyzer Handbook 2022

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