Year: 2015
Type: conference-paper
Abstract: Relatively mature methanol reforming PEMFC products have been produced domestically, and power generation efficiency of the whole system can reach 30%, but most of the waste heat is not used.Based on an experiment table of methanol reforming PEMFC system, a large mount of data about the internal temperature, pressure, electric current, voltage of the whole system running under different output power is collected, and the actual waste heat generated by the system at different output power is calculated.Then the theoretical calculation of waste heat is compared with the actual value of waste heat of the system.The direction of waste heat utilization and optimization of the whole system is proposed. RESEARCH BACKGROUNDProton exchange membrane fuel cell (PEMFC) is currently the most mature fuel cell, has a wide application in power, mobile power, distributed power and power in the family vehicle [1].In actual operation, some directly use a hydrogen storage tank to provide hydrogen fuel for the cell stack, some use reformer system to reform natural gas, methanol or other fuels into hydrogen.The way of getting hydrogen by methanol reforming has many features such as better economy, low power consumption, low reforming temperature (about 300˚C), easy to store and transport, convenient and safety to charge fuel and so on.Because of these futures, methanol reforming is attracting more and more attention [2].Barelli et al. [3] simulated and compared kilowatt cogeneration systems with ASPEN, which are based on SOFC and low-temperature PEMFC.The results show that PEMFC cogeneration system working at a state of low temperature and atmospheric pressure is a more efficient system, tough the power generation efficiency of SOFC(40%) is slightly higher than the power generation efficiency of low-temperature PEMFC(up to 32%).PEMFC cogeneration system is still the first choice for residents.Borja et al.[4] developed thermodynamics, geometry and economic models, which can be used for multi-unit housing and multi-generation proton exchange membrane fuel cell system.The results obtained by using the above models show that the power generation efficiency in the synthesis/design point reaches 39%, and the efficiency of cogeneration reaches 72%.China now has more mature methanol reforming proton exchange membrane fuel cell products, the power generation efficiency of these systems are around 30%, but the aspect of the waste heat utilization of system does not attract enough attention, there is a large room for improvement for the overall efficiency of the system.In academic research, there are more simulations about internal
Authors: Jialin Zhao, Yongwen Yang, Hong Yang, Yanan Li, Guihai Jiao, Lei Zhang, Jingjing Xu
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2186089714