Energy grade improvement cycle of exhaust airflow and optimization of heat recovery system operation

ZHONG Faqing; ZHANG Yicai; CHEN Shiqiang; JIANG Jiachuan; WU Peng

Safety in Coal Mines > 2023 > 54(1): 94-100.

ZHONG Faqing, ZHANG Yicai, CHEN Shiqiang, JIANG Jiachuan, WU Peng. Energy grade improvement cycle of exhaust airflow and optimization of heat recovery system operation[J]. Safety in Coal Mines, 2023, 54(1): 94-100.

Citation:

PDF (2003 KB)

Energy grade improvement cycle of exhaust airflow and optimization of heat recovery system operation

More Information

Published Date: January 19, 2023

Graphical Abstract

Abstract

Abstract

How to improve the thermal performance of exhaust airflow heat recovery system of mine fan diffuser is a frontier problem in green mine technology. In order to solve this problem, based on finite-time thermodynamics, the air heat pump used to improve the heat and humidity energy grade of exhaust air was used to obtain the cycle equations of ininvertible temperature and heat source, and the analytical expression of exergy profit rate about ambient temperature was derived and the expression of dimensionless exergy profit rate was defined. Used this expression and combined with the actual working conditions in period of the most difficult supply, the exergy profit rates of 6 cities are compared by every day and every hour. The results show that the suitable region of exhaust airflow heat recovery system is characterized by climate division. Especially, this system is suitable for temperate continental climate areas. In the subtropical monsoon climate areas, the change curve of exergic profit margin function in a single day is similar to the shape of “M”, and it is implacable that the revenue generated in the operation of exhaust airflow heat recovery system should be unstable. To avoid losses caused by continuous operation, it is necessary to formulate the start-stop strategy of heat recovery system, and a start-stop control method is proposed, and the benefits of the system throughout the application are calculated numerically. By comparison, the economic return is significantly improved after adopting this control method, and the maximum dimensionless exergy profit rate can be increased from -0.33 to 0.02, by an increment of 0.35.
- exhaust airflow,
- thermal energy,
- Brayton cycle,
- exergeoeconomic profit,
- ambient temperature

FullText(HTML)

References (24)

References

[1]	贺艳红．矿井通风在煤矿安全生产中的重要性[J]．当代化工研究，2020（11）：88－89. HE Yanhong. The importance of mine ventilation in coal mine safety production[J]. Modern Chemical Research, 2020（11）: 88-89.
[2]	陈明生，陈伯辉，沈斐敏．矿井通风优化评价指标体系权重确定[J]．中国安全生产科学技术，2011，7（3）：22－25. CHEN Mingsheng, CHEN Bohui, SHEN Feiming. Weight determination of evaluation index system in mine ventilation optimization[J]. Journal of Safety Science and Technology, 2011, 7（3）: 22-25.
[3]	王从陆，伍爱友．深部高温高湿矿井热平衡及热舒适评价研究[J]．矿业工程研究，2009，24（2）：34－37. WANG Conglu, WU Aiyou. Study of thermal equilibrium and thermal comfort on deep high temperature and humidity mine[J]. Mineral Engineering Research, 2009, 24（2）: 34-37.
[4]	杨帅，撒占友，王相君，等．基于环境监测的矿井通风三维仿真辅助决策系统设计[J]．中国安全生产科学技术，2020，16（1）：80－84. YANG Shuai, SA Zhanyou, WANG Xiangjun, et al. Design of 3D simulation assistant decision-making system for mine ventilation based on environmental monitoring[J]. Journal of Safety Science and Technology, 2020, 16（1）: 80-84.
[5]	杨如辉，邹声华，张帝．矿井次生热能资源的利用方式研究[J]．矿业工程研究，2010，25（4）：59－61. YANG Ruhui, ZOU Shenghua, ZHANG Di. Use patterns study of mine secondary heat energy resources[J]. Mineral Engineering Research, 2010, 25（4）: 59-61.
[6]	鲍玲玲．矿井回风热能回收热湿传递研究[D]．天津：天津大学，2013.
[7]	陈世强，陈友明，崔海蛟．上喷式矿井排风热回收装置内液滴运动模型及其优化计算[J]．安全与环境学报，2015，15（4）：78－82. CHEN Shiqiang, CHEN Youming, CUI Haijiao. Optimized calculation model for the moving droplets sprayed via an up-jet diffuser and a heat-retriever attached to the mining ventilator[J]. Journal of Safety and Environment, 2015, 15（4）: 78-82.
[8]	崔海蛟，陈世强，郑旭，等．上喷式扩散塔喷淋装置热回收与除尘理论模型构建及求解[J]．煤炭学报，2021，46（11）：3590－3598. CUI Haijiao, CHEN Shiqiang, ZHENG Xu, et al. Establishment and solution of heat recovery and dust removal model of the upper spraying device attached to a mine fan diffuser[J]. Journal of China Coal Society, 2021, 46（11）: 3590-3598.
[9]	崔海蛟，王海桥，陈世强．矿井扩散塔喷淋换热装置热质传递模型及参数优化[J]．煤炭学报，2014，39（10）：2047－2052. CUI Haijiao, WANG Haiqiao, CHEN Shiqiang. Parameters optimization and theoretical model of heat-mass transfer in a spray heat exchanger attaching to a main fan diffuser[J]. Journal of China Coal Society, 2014, 39（10）: 2047-2052.
[10]	孟杰，王建学，王晋宇．矿井回风扩散塔内气－水雾热交换数值模拟[J]．煤矿安全，2015，46（6）：4－7. MENG Jie, WANG Jianxue, WANG Jinyu. Numerical simulation for gas-water mist heat transfer in mine return air diffusion tower[J]. Safety in Coal Mines, 2015, 46（6）: 4-7.
[11]	田康，张蕊红，牛明明．大风量矿井乏风热回收蓄热井筒防冻技术研究[J]．能源与节能，2016（7）：179. TIAN Kang, ZHANG Ruihong, NIU Mingming. Study on the regenerative thermal shaft antifreezing techniques of ventilation air methane heat in the large air volume mine[J]. Energy and Energy Conservation, 2016（7）: 179-180.
[12]	刘云霞，刘咸定．用空气作工质的制冷系统研究概况[J]．制冷与空调（四川），2006（1）：105－107. LIU Yunxia, LIU Xianding. Status of research for refrigeration system using air as refrigerant[J]. Refrigeration & Air Conditioning, 2006（1）: 105-107.
[13]	BI Y, CHEN L, SUN F. Heating load density and COP optimizations for an endoreversible air heat pump[J]. Applied Energy, 2008, 85（7）: 607-617.
[14]	BI Y, CHEN L, SUN F, et al. Exergy-based ecological optimizations for an endoreversible air heat pump cycle[J]. Int. J. Ambient Energy, 2009, 30（1）: 45-52.
[15]	BI Y, CHEN L, SUN F. Optimum allocation of heat exchanger inventory of irreversible air heat pump cycles[J]. Int. J. Sustainable Energy, 2010, 29（3）: 133.
[16]	张翼，陈林根，柴国钟．恒温热源中冷回热式空气制冷机的■经济性能优化[J]．低温工程，2014（3）：54 -61. ZHANG Yi, CHEN Lingen, CHAI Guozhong. Exergoeconomic optimization of an irreversible inter-cooled regenerated air refrigerator with constant-temperature heat reservoirs[J]. Cryogenics, 2014（3）: 54-61.
[17]	张翼，陈林根，柴国钟．不可逆恒温热源空气制冷机的■经济性能优化[J]．真空与低温，2014，20（4）：213－218. ZHANG Yi, CHEN Lingen, CHAI Guozhong. Exergoeconomic optimization of an irreversible air refrigerator with constant-temperature heat reservoirs[J]. Vacuum and Cryogenics, 2014, 20（4）： 213-218.
[18]	张翼，陈林根，柴国钟．不可逆回热式变温热源空气制冷机的利润率优化[J]．太阳能学报，2016，37（4）：924－931. ZHANG Yi, CHEN Lingen, CHAI Guozhong. Profit rate optimization of irreversible regenerated air refrigerator with variable-temperature heat reservoirs[J]. Acta Energiae Solaris Sinica, 2016, 37（4）: 924-931.
[19]	屠友明，陈林根，孙丰瑞．变温热源不可逆布雷顿制冷循环制冷率和制冷系数优化[J]．低温工程，2005（3）：16－22. TU Youming, CHEN Lingen, SUN Fengrui. Optimization of cooling load and COP for an irreversible Brayton refrigerator with variable temperature heat reservoirs[J]. Cryogenics, 2005（3）: 16-22.
[20]	CHEN L, NI N, SUN F, et al. Heating load versus COP characteristics for irreversible air-hert pump cycles[J]. International Journal of Power and Energy Systems, 2001, 21（1）: 105-111.
[21]	余建祖．换热器原理与设计[Ｍ]．北京：北京航空航天大学出版社，2005.
[22]	毕月虹，陈林根，孙丰瑞．不可逆空气热泵循环供热率密度优化[J]．华北电力大学学报（自然科学版），2010，37（1）：96. BI Yuehong, CHEN Lingen, SUN Fengrui. Optimization of heating load density for an irreversible air heat pump cycle[J]. Journal of North China Electric Power University(Natural Science Edition), 2010, 37（1）: 96.
[23]	陈世强，张艺才，刘刚，等．矿井排风热回收装置中循环水量优化与数值分析[J]．安全与环境学报，2021， 21（5）：2006－2012. CHEN Shiqiang, ZHANG Yicai, LIU Gang, et al. Optimization and numerical analysis of circulating watervolume in exhaust heat recovery device of mine fan diffuser[J]. Journal of Safety and Environment, 2021, 21（5）: 2006-2012.
[24]	张艺才，陈世强，朱文霞，等．一种热回收系统中排风能量提取装置的启停控制器：CN214747453U[Ｐ].2021－11－16．

[1]	CHEN Tiehua. Concept definition and scale development of miners’ safety commitment[J]. Safety in Coal Mines, 2023, 54(8): 258-264.
[2]	TIAN Shuicheng, ZHAO Zhaoying, FAN Binbin, CAI Xinfu, SUN Wen, GAO Ling. Research on fatigue and unsafe behavior of miners based on SEM[J]. Safety in Coal Mines, 2022, 53(6): 247-251.
[3]	YANG Xue, YANG Juan, ZHANG Hanyuan. Study on emotional evolution mechanism of miners based on system dynamics[J]. Safety in Coal Mines, 2021, 52(1): 252-256.
[4]	QI Hui, ZHANG Mingyang, CHEN Hong. Mechanism of Group Norms on Miners’ Violation Behaviors[J]. Safety in Coal Mines, 2018, 49(9): 293-296.
[5]	YANG Xue, TIAN Yang, TONG Fengming. Research on Miners’ Emotional Supervision and Unsafe Behavior Based on Evolutionary Game[J]. Safety in Coal Mines, 2018, 49(8): 299-302.
[6]	LI Hongxia, LI Siqi. Research on Relationship Between Safety Cognition and Unsafe Behavior of Coal Miners[J]. Safety in Coal Mines, 2017, 48(11): 233-236.
[7]	GAI Lili. Research on Miners' Unsafe Behavior Based on Dynamic Game Theory[J]. Safety in Coal Mines, 2016, 47(9): 251-253.
[8]	TIAN Shuicheng, KOU Meng, XUE Jianwen. Test Measurement on Miners' Capacity of Safety Behaviors[J]. Safety in Coal Mines, 2015, 46(12): 245-248.
[9]	MAN Shen-gang. Analysis and Control Countermeasures of Miner Unsafe Behaviors[J]. Safety in Coal Mines, 2013, 44(12): 217-220.
[10]	TIAN Shui-cheng, ZHAO Xue-ping, HUANG Xin, LI Ting-jun, LI Guang-li. Research on Miner Unsafe Behavior Intervention Based on Evolutionary Game Theory[J]. Safety in Coal Mines, 2013, 44(8): 231-234.

Cited By

Get Citation

PDF

XML

Article views (25) PDF downloads (12)

Turn off MathJax

Article Contents

Abstract

References

Energy grade improvement cycle of exhaust airflow and optimization of heat recovery system operation

Abstract

References

Related Articles

Catalog

Energy grade improvement cycle of exhaust airflow and optimization of heat recovery system operation

Abstract

References

Related Articles

Catalog

Export File

Citation

Format

Content