闭式热泵干燥系统回热方式设计及热力学分析

doi:10.13733/j.jcam.issn.20955553.2024.12.032

摘要/Abstract

摘要： 针对水稻烘干的应用场景，为提升闭式热泵干燥CHPD系统的单位能耗除湿量SMER，设计2种回热方式，通过配置回热器对干燥室出口湿空气和辅助冷凝器出口制冷剂进行预冷和余热回收。建立各式CHPD系统的热力学模型，计算其热力学特性，并进行敏感性分析和对比分析。结果表明，2种回热方式使得无回热的CHPD系统的SMER分别提升0.46kg/kWh和0.50kg/kWh。此外，二者能够实现良性的耦合，在不同的干燥室入口和出口温度组合下，耦合2种回热方式的CHPD系统的SMER平均提升量为0.85kg/kWh。

关键词: 水稻烘干, 闭式热泵干燥, 热力学建模, 回热方式

Abstract:

In order to improve the specific moisture extraction rate (SMER) of the closed-cycle heat pump drying (CHPD) system, two heat recovery methods are designed for the application scenario of rice drying, which are equipped with a regenerator to pre-cool and recover waste heat from the moist air at the outlet of the drying chamber and the refrigerant at the outlet of the auxiliary condenser. The thermodynamic models of various CHPD systems were established, their thermodynamic characteristics were calculated, and sensitivity analysis and comparative analysis were conducted. The results show that the two heat recovery methods improve the SMER of the CHPD system without heat recovery by 0.46 kg/kWh and 0.50 kg/kWh, respectively. Moreover, the two can achieve a benign coupling, and the average SMER improvement of the CHPD system coupled with the two heat recovery methods is 0.85 kg/kWh at different drying chamber inlet and outlet temperature combinations.

Key words: rice drying, closed-cycle heat pump drying, thermodynamic modeling, heat recovery method

中图分类号:

TK123

张茜颖, , 王迪, 袁俊球, , 邓中诚, 秦斌, 孙立. 闭式热泵干燥系统回热方式设计及热力学分析[J]. 中国农机化学报, 2024, 45(12): 216-223.

Zhang Xiying, , Wang Di, Yuan Junqiu, , Deng Zhongcheng, Qin Bin, Sun Li. Design and thermodynamic analysis of heat recovery method for closed-cycle heat pump drying system[J]. Journal of Chinese Agricultural Mechanization, 2024, 45(12): 216-223.

参考文献

［1］　王教领, 宋卫东, 任彩红, 等. 我国香菇干燥技术研究进展［J］. 中国农机化学报, 2021, 42(7): 76-83.
Wang Jiaoling, Song Weidong, Ren Caihong, et al. Research on the drying process of lentinus edodes in China ［J］. Journal of Chinese Agricultural Mechanization, 2021, 42(7): 76-83.
［2］　王桂英. 粮食热风干燥冷凝增效节能机理与技术的研究［D］. 吉林: 吉林大学, 2022.
Wang Guiying. Study of the energy saving mechanism and technology of hot air drying condensation increasing efficiency of Grain ［D］. Jilin: Jinlin University, 2022.
［3］　左逢源, 张玉琼, 赵强, 等. 计及源荷不确定性的综合能源生产单元运行调度与容量配置两阶段随机优化［J］. 中国电机工程学报, 2022, 42(22): 8205-8215.
Zuo Fengyuan, Zhang Yuqiong, Zhao Qiang, et al. Twostage stochastic optimization for operation scheduling and capacity allocation of integrated energy production unit considering supply and demand uncertainty ［J］. Proceedings of the CSEE, 2022, 42(22): 8205-8215.
［4］　肖雄峰, 方壮东, 李长友. 我国粮食干燥机械化装备技术发展研讨［J］. 中国农机化学报, 2018, 39(5): 97-101, 110.
Xiao Xiongfeng, Fang Zhuangdong, Li Changyou. Discussion on development of grain drying mechanization equipment technology in China ［J］. Journal of Chinese Agricultural Mechanization, 2018, 39(5): 97-101, 110.
［5］　张紫恒, 张吉军, 唐正, 等. 北方粳高粱微波干燥特性试验与仿真分析［J］. 中国农机化学报, 2021, 42(11): 65-71.
Zhang Ziheng, Zhang Jijun, Tang Zheng, et al. Experiment and simulation analysis of microwave drying characteristics of northern japonica sorghum ［J］. Journal of Chinese Agricultural Mechanization, 2021, 42(11): 65-71.
［6］　Saniso E, Swasdisewi T, Soponronnarit S, et al. Methods of producing parboiled rice by hot air and combined microwavehot air fluidized bed drying ［J］. Drying Technology, 2022, 40(10): 1980-1993.
［7］　阚明琪, 王庆惠, 郭俊先, 等.基于响应面法的哈密瓜片热风干燥工艺优化研究［J］. 中国农机化学报, 2023, 44(3): 94-100.
Kan Mingqi, Wang Qinghui, Guo Junxian, et al. Optimization of hot air drying process for Hami melon slice based on response surface methodology［J］. Journal of Chinese Agricultural Mechanization, 2023, 44(3): 94-100.
［8］　刘攀, 张虎, 张玉龙, 等. 粮食干燥机的现状及发展趋势［J］. 现代农业装备, 2019, 40(3): 16-18.
Liu Pan, Zhang Hu, Zhang Yulong, et al. Development status and prospects of grain dryers ［J］. Modern Agricultural Equipment, 2019, 40(3): 16-18.
［9］　沈文龙, 宋镇, 张波, 等. 杏鲍菇热泵干燥特性及工艺参数优化［J］. 中国农机化学报, 2019, 40(10): 135-141, 168.
Shen Wenlong, Song Zhen, Zhang Bo, et al. Drying characteristics and optimization of process parameters for heat pump drying of Pleurotus eryngi ［J］. Journal of Chinese Agricultural Mechanization, 2019, 40(10): 135-141, 168.
［10］　Zhang Weipeng, Chen Chang, Pan Zhongli, et al. Design and performance evaluation of a pilotscale pulsed vacuum infrared drying (PVID) system for drying of berries ［J］. Drying Technology, 2020, 38(10): 1340-1355.
［11］　杨鲁伟, 魏娟, 陈嘉祥. 热泵干燥技术研究进展［J］. 制冷技术, 2020, 40(4): 2-8, 27.
Yang Luwei, Wei Juan, Chen Jiaxiang. Research progress of heat pump drying technology ［J］. Chinese Journal of Refrigeration Technology, 2020, 40(4): 2-8, 27.
［12］　Ren Yan, Chen Zhongwei, Wu Weidong, et al. Study on the effect of circulating air volume on the performance of closed loop heat pump drying system ［J］. Applied Thermal Engineering, 2022, 210: 118362.
［13］　Duc V N, Tran N T Y, Le T D, et al. Kinetic model of moisture loss and polyphenol degradation during heat pump drying of soursop fruit (Annona muricata L) ［J］.Processes, 2022, 10(10): 2082.
［14］　钱睿, 吴达科, 杨明金. 基于Fluent的棉花烘房流场均匀性优化［J］. 中国农机化学报, 2023, 44(1): 152-161.
Qian Rui, Wu Dake, Yang Mingjin. Optimization of flow field uniformity in cotton drying room based on Fluent ［J］. Journal of Chinese Agricultural Mechanization, 2023, 44(1): 152-161.
［15］　Babu A K, Kumaresan G, Raj V A A, et al. CFD studies on different configurations of drying chamber for thinlayer drying of leaves ［J］. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019, 42(18): 2227-2239.
［16］　Ko瘙塂an M, Demirta瘙塂 M, Akta瘙塂 M, et al. Performance analyses of sustainable PV/T assisted heat pump drying system ［J］. Solar Energy, 2020, 199: 657-672.
［17］　Dong Xiaofei, Zhao Hongxia, Kong Fanchen, et al. Parameter optimization of multistage closed series heat pump drying system ［J］. Applied Thermal Engineering, 2022, 216: 119124.
［18］　Zhu Zhizhuang, Zhao Ya, Zhang Yuexiang, et al. Effects of ultrasound pretreatment on the drying kinetics, water status and distribution in scallop adductors during heat pump drying ［J］. Journal of the Science of Food and Agriculture, 2021, 101(15): 6239-6247.
［19］　Hao Wengang, Liu Shuonan, Lai Yanhua, et al. Research on drying Lentinus edodes in a direct expansion heat pump assisted solar drying system and performance of different operating modes ［J］. Renewable Energy, 2022, 196: 638-647.
［20］　Erbay Z, Hepbasli A. Assessment of cost sources and improvement potentials of a groundsource heat pump food drying system through advanced exergoeconomic analysis method ［J］. Energy, 2017, 127, 502-515.
［21］　黄才高. 水稻烘干机干燥作业工作要点［J］. 广西农业机械化, 2018(2): 32-33.
［22］　李浩权, 刘清化, 吴耀森, 等. 热泵干燥系统最大除湿量计算模型［J］. 中国农机化学报, 2017, 38(4): 94-98.
Li Haoquan, Liu Qinghua, Wu Yaosen, et al. Study on maximum dehumidification calculation model of heat pump drying system ［J］. Journal of Chinese Agricultural Mechanization, 2017, 38(4): 94-98.
［23］　赵星辰, 冯荣, 李旭杰, 等. 汽油发电机驱动的热泵干燥系统制热性能仿真［J］. 中国农机化学报, 2022, 43(1): 101-108.
Zhao Xingchen, Feng Rong, Li Xujie, et al. Heating performance simulation of a heat pump drying system driven by agasoline generator ［J］. Journal of Chinese Agricultural Mechanization, 2022, 43(1): 101-108.
［24］　李振博, 武卫东, 孔德军, 等. 辅助冷凝器冷却水进水温度对闭式热泵干燥系统性能的影响［J］. 制冷技术, 2020, 40(4): 55-61.
Li Zhenbo, Wu weidong, Kong Dejun, et al. Effect of cooling water inlet temperature of auxiliary condenser on performance of closed heat pump drying system ［J］. Chinese Journal of Refrigeration Technology, 2020, 40(4): 55-61.
［25］　叶祖樑, 王驿凯, 潘祖栋, 等. 空气源跨临界CO2热泵中回热器影响的研究［J］. 西安交通大学学报, 2019, 53(5): 1-8.
Ye Zuliang, Wang Yikai, Pan Zudong, et al. A study on the effect of the internal heat exchanger in an airsource transcritical CO2 heat pump system ［J］. Journal of Xian Jiaotong University, 2019, 53(5): 1-8.
［26］　余龙, 俞树荣, 李春玲. 地源热泵供热性能在粮食干燥中的特性研究［J］. 中国农机化学报, 2014, 35(2): 89-93.
Yu Long, Yu Shurong, Li Chunling. Supply heat and moisture absorption of ground source heat pump for grain ［J］. Journal of Chinese Agricultural Mechanization, 2014, 35(2): 89-93.