How to Drive Zero Emissions
in Commercial Vehicles?
Control of thermal management systems for hydrogen fuel cells
Effective control of thermal management systems for hydrogen cell powered drivetrains will improve overall performance, reliability, and efficiency, and help in the mission to drive down emissions within the commercial vehicle sector.
A reduction in the level of vehicle emissions is at the top of transportation businesses agendas as it is now a legislative requirement in most countries.
How to increase hydrogen fuel cell efficiency
The use of electric powertrains powered by hydrogen as a fuel source is set to play an increasingly crucial role in helping commercial vehicle sectors address the ongoing environmental challenges they face and drive attainment of vital net reductions in CO2 emissions from heavy duty vehicles and buses. Indeed, developments in hydrogen fuel cell technology and performance now offer companies a pathway to be able to successfully operate zero emission vehicles going forward.
However, with continuous investment into the technological advances seen in fuel cell systems, the importance of thermal management solutions has increased. They help to improve the overall efficiency of the types of fuel cell, batteries and electric motors which are now more commonly used in alternative powertrain vehicles which are designed to enhance environmental performance.
While the impact on emission reduction and diesel engine efficiency are the key metrics for thermal management systems in conventional powertrains, alternative powertrains have a different set of requirements. These include improvements in range and charging times, as well as a reduction in overall system size, mass and subsequently, a reduction in total cost of ownership.
When control is key
When a powertrain system uses a hydrogen fuel cell, a catalyst at the anode separates hydrogen molecules into electrons and protons. Passing through an external circuit the electrons create a flow of electricity which powers the vehicle. However, during this process, heat transfer occurs which means that thermal management systems, which use air or liquid coolants, are needed to ensure the performance of the fuel cell is optimised, while also ensuring the vehicle operates within its safety parameters.
With the requirement for cooling, also comes the need for precise control of the valves within the fuel cell process which open and control the amount of coolant entering the system.
Norgren Motorised Valves
- High volume flow capabilities
- Compact design and chemically compatible with a range of coolants
- Higher level of precision control
ECE R10 requirements for electromagnetic compatibility in emissions
This sets requirements for electromagnetic compatibility in emissions, regarding the control of unwanted radiated and conducted emissions to protect the intended use of electrical or electronic equipment from nearby or adjacent vehicles, and the control of electrical disturbances from accessories that may be retrofitted to the vehicle.
Better temperature applicability
This is particularly important with commercial vehicles given the high voltages used to drive the electric motors. Additionally, the valve’s ability to operate efficiently within large temperature ranges and withstand high pressure peaks makes it the ideal solution for commercial vehicle applications that operate in harsh environments, such as heavy-duty truck, buses, and rail.
The Norgren Motorised Valve in Action
Norgren has been partnering with global commercial vehicle manufacturers and operators for more than 30 years. During this time, we have worked closely with customers to develop the solutions which address their specific business needs.
Sinosynergy: A high-tech enterprise that specialises in the manufacture of hydrogen fuel cells.
Recently, we worked with the business to deliver motorised valves for fuel cell systems specified on a fleet of more than 500 buses. The proportional valves supplied included 3/2-
way motorised valves and 2/2-way motorised valves. They were used within the fuel cell temperature management system to proportionally control the heating and cooling of
the fuel cell, while the second valve was installed at the fuel cell air process to control air supply proportionally into the fuel cell.
One stop shop
As part of our commitment to support customers with a one-stop-shop for their motion and fluid controls needs, in addition to the Motorised Valve solutions, Norgren also offers a broad portfolio for on and off-highway vehicles, including valve actuators which are ECE R10 approved and available in 12 and 24 VDC options.