摘要
空气取水能够有效解决野外作业期间的供水问题.本文建立由常微分方程组构成的分布参数除湿转轮模型,搭建柴油机余热回收空气取水模型,研究柴油机工况变化过程中取水系统的动态工作状况.结果表明:在柴油机目标转速提高时,转轮取水量和吸附剂吸附率较再生空气和吸附剂温度稳定所需时间更长,需转轮循环工作6~7个周期后重新稳定;取水量受再生空气温度影响较大;在转轮环境空气流量较大时,系统变工况下运行稳定性更好.为保证系统高取水速率与稳定性,环境空气流量应维持在800~1000 m 3/h.本文模型可用于进一步研究转轮空气取水系统的控制与运行优化.
Atmospheric water harvesting is an effective way to solve the problem of water supply during field operations.In this paper,a distributed parameter desiccant rotary wheel model composed of ordinary differential equations is established,and an atomospheric water harvesting model using diesel engine waste heat recovery is established to study the dynamic characteristics of water harvesting system during the change of diesel engine working conditions.The results show that the water harvesting amount and the adsorption rate of the adsorbent in the rotary wheel have a longer stable time than the temperatures of the regenerated air and the adsorbent in the rotary wheel in the process of increasing the target speed of diesel engine,requiring the rotating wheel to work for 6-7 cycles to reach a stable stage.The water harvesting amount is greatly affected by the regenerated air temperature.When the environmental air flow of the rotary wheel is greater,the stability of the system is better under off-design conditions.In order to ensure a high water harvesting rate and stability of the system,the environmental air flow rate should be maintained at 800-1000 m 3/h.The model in this paper can be used to further study the control and operation optimization of the rotary wheel atmospheric water harvesting system.
作者
徐璐瑶
周登极
贾星云
何颖雪
XU Luyao;ZHOU Dengji;JIA Xingyun;HE Yingxue(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第5期856-861,共6页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金(51706132)。
关键词
余热利用
除湿转轮
分布参数
动态特性
热力系统仿真
waste heat utilization
desiccant rotary wheel
distribution parameter
dynamic characteristic
thermal system simulation
