scholarly journals System optimization of thermal management performance of fuel cell system for automobile

2021 ◽  
Vol 25 (4 Part B) ◽  
pp. 2923-2931
Author(s):  
Wenfeng Bai ◽  
Caofeng He
Keyword(s):  
Fuel Cell ◽  
Thermal Management ◽  
Management System ◽  
Surface Wind ◽  
Cooling Water ◽  
System Optimization ◽  
Cell System ◽  
Management Control ◽  
Thermal Management System ◽  
Bypass Valve

Vehicle fuel cell systems release a large amount of heat while generating electricity. The suitable thermal management system must be built to ensure system performance and reliability. Based on the analysis of the working principle of the vehicle fuel cell thermal management system, the paper establishes a control-oriented fuel cell thermal management. The stack, air cooler, hydrogen heat exchanger, bypass valve, heat sink, and cooling water circulating pump model are taking into account. System model, and the relationship between stack current, coolant flow rate, fin surface wind speed, bypass valve opening, and fuel cell temperature are in established in simulation experiments. The paper discusses their effects on system as a whole, air coolers, hydrogen heat exchangers, and the influence of the temperature difference between the inlet and outlet of the radiator. The simulation results can provide guidance and help to design the fuel cell thermal management control system.

Thermal Management System Analysis of Underwater Vehicle Fuel Cell Propulsion Unit

2013 ◽  
Vol 779-780 ◽  
pp. 857-860
Author(s):  
Hua Feng Li ◽  
Xiao Feng Wang ◽  
Xia Ming Kong ◽  
Xing Sheng Lao
Keyword(s):  
Fuel Cell ◽  
Thermal Management ◽  
System Performance ◽  
Management System ◽  
Cooling Water ◽  
Underwater Vehicle ◽  
Outlet Temperature ◽  
Fuel Cell Stack ◽  
Thermal Management System ◽  
Propulsion Unit

A lumped parameter model is developed to study thermal management system performance of underwater vehicle equipping large power proton exchange membrane fuel cell propulsion unit. Fuel cell voltage current characteristic and heat release characteristic are represented by models which take effect of cooling water temperature into considered. Fuel cell stack performance models are validated against experimental data. Cooperated with experimental based models of water pump and heat exchanger, thermal management system performance is analyzed while fuel cell stack fresh cooling water outlet temperature is set to be at a certain value. The results show that inlet seawater temperature variation has little effect on opening of regulating valve, but engine power output variation results in notably regulating valve opening fluctuation. Modeling results would be employed in design of a underwater vehicle 300kW fuel cell engine system..

A Thermal Management System for a PEM Fuel Cell System in Commercial Vehicles

2010 ◽  
Author(s):  
Jong-Woo Ahn ◽  
Song-Yul Choe
Keyword(s):  
Fuel Cell ◽  
Thermal Management ◽  
Management System ◽  
Pem Fuel Cell ◽  
Cell System ◽  
State Feedback Control ◽  
Fuel Cell System ◽  
Commercial Vehicles ◽  
Coolant Pump ◽  
Thermal Management System

Polymer electrolyte membrane (PEM) fuel cell operating in commercial vehicles produces a relatively high amount of heat. In order for securing durable operations, the produced heat should be rejected to keep the temperature in the cell under the limit. High temperature increases the rate of electrochemical reactions and mobility of water vapor. However, a thermal stress imposing on the thin layers of catalysts and membranes can accelerate degradation processes. Therefore, proper design of a thermal management system (TMS) and the associated control is required for ensuring highly reliable and efficient operations of the system. A typical thermal circuit consisting of a radiator, a fan, a reservoir and a coolant pump has been used to reject the excessive heat from the fuel cell. However, the capability of heat rejection is limited by sizes of the components that cannot be employed in heavy duty vehicles. In this study, we used two coolant loops, where the inner circuit consists of a bypass valve, a heat exchanger, a reservoir and a water pump and the outer circuit includes a radiator, a fan, a reservoir and a coolant pump. A state feedback control for the two loops was designed. Objectives for the controls were to maintain the temperature at the set value and to reduce the parasitic loss of the system. The controllers were tested on a dynamic model of a stack developed in the laboratory. Included is analysis of dynamic performance of the designed controllers at multiple step currents and FUDS. As a result of the proposed thermal management system, the size of radiator and the capacity of the pumps for proposed design become 10% smaller than those for the typical one. In addition, the overall net power of the fuel cell system increases to 5%.

The Dynamic Modeling of PEMFC System for Automotive Application

2008 ◽  
Author(s):  
Sanggyu Kang ◽  
Kyoungdoug Min
Keyword(s):  
Energy Balance ◽  
Thermal Management ◽  
Dynamic Modeling ◽  
Management System ◽  
Mass Conservation ◽  
Cell System ◽  
Operating Conditions ◽  
Automotive Application ◽  
Thermal Management System ◽  
Control Volumes

Water and thermal management are crucial factors in determining the performance of PEMFC for automotive application. In order to investigate the effect of cell humidity and temperature on the performance of PEMFC, a dynamic model of a PEMFC system for automotive application has been developed by using Matlab/Simulink®. The model is composed of a PEM unit cell, membrane humidifier, and thermal management system (TMS). At first, fuel and air are well hydrated by the shell and tube humidifier, then humidified fuel and air flow into the PEMFC for electrochemical reaction. PEMFC temperature was maintained at a constant level by the thermal management system. The active area of PEM model is 240 cm2. The cell was discretized into several control volumes in the through-plane to resolve energy balance and species diffusion. The membrane humidifier model is also discretized into three control volumes in the through-plane to resolve the mass conservation and energy balance. Fuel and air are hydrated by the diffusion of the water through the membrane. The thermal management system consists of radiator, fan and pump. De-ionized water cools down the temperature of PEMFC. In order to validate the model, the model was compared with a corresponding experiment. Comparison shows that simulation results are in good agreement with experiments. And the dynamic response of PEMFC with regard to the change of current was also investigated. The model is useful to elucidate the relationships between operating conditions such as air relative humidity, temperature, etc. It is expected that this dynamic modeling of PEMFC system can contribute to the design optimization of PEM fuel cell system for vehicle application.

Modelling and control of vehicle integrated thermal management system of PEM fuel cell vehicle

Energy ◽  
2020 ◽  
Vol 199 ◽  
pp. 117495
Author(s):  
Jiamin Xu ◽  
Caizhi Zhang ◽  
Ruijia Fan ◽  
Huanhuan Bao ◽  
Yi Wang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Thermal Management ◽  
Management System ◽  
Pem Fuel Cell ◽  
Fuel Cell Vehicle ◽  
Thermal Management System ◽  
And Control

Thermal Management System Modeling and Simulation of a Full-Powered Fuel Cell Vehicle

2019 ◽  
Vol 142 (6) ◽  
Author(s):  
Yiping Wang ◽  
Jing Li ◽  
Qi Tao ◽  
Mohamed H. S. Bargal ◽  
Mengting Yu ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Thermal Management ◽  
Management System ◽  
Operating Temperature ◽  
System Modeling ◽  
Load Condition ◽  
Proton Exchange ◽  
Fuel Cell Vehicle ◽  
Thermal Management System ◽  
Stack Model

Abstract Thermal management is an important factor in securing the safe and effective operation of a fuel cell vehicle (FCV). A parameterized stack model of a 100 kW proton exchange membrane fuel cell (PEMFC) is constructed by matlab/Simulink to design and asses the thermal management characteristics of a 100 kW full-powered FCV. The cooling components model, with parameters obtained by theoretical calculation based on the cooling requirement, is developed in the commercial solver GT-COOL. A thermal management simulation platform is constructed by coupling the stack model and cooling components. The accuracy of the modeling method for the stack is validated by comparing with the experimental data. The relationship between the operating temperature and output performance of the fuel cell stack is revealed based on the simulation model. The simulation results show that the operating temperature has a considerable influence on stack performance under high-current operation, and the inlet and outlet temperatures of the stack change nearly linearly with the increasing environmental temperature. The heat dissipation potential of the thermal management system under the high-load condition is also verified. The temperatures and coolant flow of core components, including the stack, DC/DC, air compressor, and driving motor, can meet the cooling requirements.

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