Effect analysis on the low-temperature preheating performance of a novel micro-combustor air preheater for the cold start of the Li-ion battery packs

被引：1

作者：

Li, Jintao ^{[1
]}

E, Jiaqiang ^{[1
,2
]}

Ding, Jiangjun ^{[1
]}

Cai, Lei ^{[1
]}

Luo, Bo ^{[1
]}

机构：

[1] Hunan Univ, Coll Mech & Vehicle Engn, Changsha 410082, Peoples R China

[2] Hunan Univ, Inst New Energy & Energy Saving & Emiss Reduct Tec, Changsha 410082, Peoples R China

来源：

ENERGY | 2024年 / 312卷

基金：

中国国家自然科学基金;

关键词：

Hydrogen; Micro-combustor; Premixed combustion; Air preheater; Li-ion battery preheating; ENERGY-CONSUMPTION; EMISSIONS; CAVITY; FIN;

D O I：

10.1016/j.energy.2024.133606

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this work, a micro-combustor (MC) air preheater as the heat source is developed. This novel air preheater has a compact size and outputs hot air with a wide range of temperatures with high temperature uniformity, which can well meet the preheating needs of Li-ion batteries in cold environments. Numerical studies are carried out to investigate the effects of baffle height, number of fins Nfin, hot air inlet velocity, cold air inlet velocity and combustor inlet velocity on the performance of the air preheater. The heating power of the air preheater can be adjusted by changing combustor inlet velocity Vcombustor, the outlet temperature can be easily adjusted by changing cold air inlet velocity Vcold and hot air inlet velocity Vhot, and the addition of baffles makes the outlet temperature very uniform. The results show that the height of the baffle of 20 mm and 30 mm makes Delta Tair not exceed 1.5 K. The air preheater performance is better with fin number 6, and the maximum air temperature of 309.8 K is obtained with fin number and Vhot of 6 and 0.3 m/s respectively. Tair can vary between 287.8 K and 309.8 K when Vcombustor = 12 m/s.

引用

页数：15