内热型超声雾化溶液再生系统最优内热量的研究

doi:10.11949/0438-1157.20190697

摘要/Abstract

摘要：

基于质量守恒、能量守恒定律，建立了内热型超声雾化溶液再生系统（IH-UARS）的再生性能预测模型并进行了充分的实验验证，通过研究不同内热量下IH-UARS的再生性能及其变化规律，寻求系统所需的最佳内热量并明确其可能的影响因素。结果表明：IH-UARS系统存在最优的内热量范围，使其再生系统性能最佳；所需最优内热量随着再生溶液流量增大呈显著的对数增长，但受空气流量的影响较弱；在该研究中的标准工况下，IH-UARS所需最优内热量约为275~350 W。此外研究发现：内热量的增长有益于促进初始浓度较高的溶液进一步浓缩再生，如当IH-UARS中内热量增至800 W时，其初始浓度为36%的溶液比24%的溶液浓度增量指标改善幅度高37%。研究所得结果可对提高溶液再生性能及经济性提供积极参考。

关键词: 超声雾化, 溶液, 再生, 内热量, 最优, 建筑节能

Abstract:

Based on the laws of mass conservation and energy conservation, the regeneration performance prediction model of IH-UARS is established and verified by experiments. Besides, experimental runs were conducted to verify the feasibility of the developed model. The results show that there exists an optimal range of internal heating, which makes the regeneration system present the most energy-efficient regeneration. The optimal heating power was found increasing logarithmically with the growth of the flow rate of the desiccant solution but is weakly affected by the flow rate of the scavenging airflow. Under the standard operating conditions of the present study, the optimal heat power for IH-UARS was around 275 to 350 W. Furthermore, it was also found that the internal heating seems to be more beneficial for regenerating the dilute desiccant solution with a higher initial mass fraction. For instance, by increasing the internal heating power to 800 W, the $D M F I G l$ of the desiccant solution, with inlet concentration of 36% was better than the desiccant solution with inlet concentration of 24%, with the improvement of $D M F I G l$ amplitude reached 37%. The study may help realize the optimal running of the internally-heated desiccant regeneration system.

Key words: ultrasonic atomization, solution, regeneration, internally-heating power, optimal, building energy efficiency

中图分类号:

TU 834.9

倪辉, 杨自力, 钟珂, 陶睿杨, 谷雨倩. 内热型超声雾化溶液再生系统最优内热量的研究[J]. 化工学报, 2020, 71(3): 1035-1044.

Hui NI, Zili YANG, Ke ZHONG, Ruiyang TAO, Yuqian GU. Study on optimal heating power for internally-heated ultrasonic atomization liquid desiccant regeneration system[J]. CIESC Journal, 2020, 71(3): 1035-1044.

图/表 12

图1 内热式超声雾化再生器结构示意及内部热质传递过程

Fig.1 Schematic of IH-UARS regenerator and regeneration principle

表1 IH-UARS验证实验运行工况

Table 1 Operation conditions for experimental verification study of IH-UARS

参数	额定工况	变化范围
进口溶液流量G_l_,i/(kg·h^-1)	45	13.5~69.5
进口溶液温度t_l_,i/℃	60	35~65
进口溶液浓度n_i/%	26	24~32
进口空气流量G_a,i/(kg·h^-1)	92.5	68~115.5
进口空气温度t_a,i/℃	32	26~36
进口空气含湿量d_i/(g·(kg 干空气)^-1)	18	10~22
液气比G_l_,i/G_a,i	0.49	0.15~0.75

图2 内热式超声雾化溶液再生系统示意图

Fig.2 Schematic of IH-UARS

图3 预测模型的实验验证结果

Fig.3 Experimental validation of prediction model

表2 IH-UARS模型运行工况

Table 2 Operation conditions for simulation of IH-UARS

参数	额定工况	变化范围
进口溶液温度t_l_,i/℃	60	35~65
进口溶液浓度ω/%	26	22~36
进口空气流量G_a,i/(kg·h^-1)	90	11.25~180
进口空气温度t_a,i/℃	32	22~40
进口空气含湿量d_i/(g·(kg 干空气)^-1)	18	10~28
液气比G_l_,i/G_a,i	0.5	0.25~4

图4 不同空气流量下内热量与再生性能的关系

Fig.4 Effects of internal-heating power on regeneration performance at different air flow rates

图5 不同空气流量下SRR及其变化率与内热量的关系

Fig.5 Relationships between SRR and slope of SRR and internal heat at different air flow rates

图6 不同溶液流量下内热量与再生性能的关系

Fig.6 Effects of internal-heating power on regeneration performance at different desiccant flow rates

图7 不同溶液流量下内热量与SRR及其变化率的关系

Fig.7 Relationships between SRR and slope of SRR and internal heat at different desiccant flow rates

图8 不同溶液流量下IH-UARS的最优内热量及其再生性能RR

Fig.8 Potential optimal heating power of IH-UARS and its corresponding RR at different desiccant flow rates

图9 不同溶液浓度下再生性能与内热量的关系

Fig.9 Effects of internal-heating power on regeneration performance at different desiccant inlet mass fractions

图10 不同加热量下RR与入口溶液浓度之间的关系

Fig.10 Relationships between RR and desiccant inlet mass fractions at different internal-heating powers

参考文献 31

1	刘晓华, 张涛, 江亿. 采用吸湿剂处理湿空气的流程优化分析[J]. 暖通空调, 2011, 41(3): 77-87.
	Liu X H, Zhang T, Jiang Y. Optimization of heat and mass transfer processes between desiccant and moist air[J]. Journal of HV&AC, 2011, 41(3): 77-87.
2	Ahmed H A, Ge G M, Carey J S. Performance analysis of a membrane liquid desiccant air-conditioning system[J]. Energy and Buildings, 2013, 62: 559-569.
3	刘晓华, 李震, 张涛. 溶液除湿[M]. 北京: 中国建筑工业出版社, 2014: 23-89.
	Liu X H, Li Z, Zhang T. Liquid Desiccant Dehumidification[M]. Beijing: China Architecture & Building Press, 2014: 23-89.
4	殷勇高, 潘雄伟, 陈瑶, 等. 顺流型溶液与空气热质交换性能[J]. 化工学报, 2012, 63: 26-31.
	Yin Y G, Pan X W, Chen Y, et al. Heat and mass transfer performance between liquid desiccant and air with parallel flow[J]. CIESC Journal, 2012, 63: 26-31.
5	彭冬根, 程小松, 李霜玲, 等. 一种新型溶液除湿装置数学模型及性能分析[J]. 太阳能学报, 2019, 40(2): 474-479.
	Peng D G, Cheng X S, Li S L, et al.Mathematical model and performance analysis of a new liquid desiccant dehumidifer[J]. Acta Energiae Solaris Sinica, 2019, 40(2): 474-479.
6	Zhang T, Liu X H, Jiang J J, et al. Experimental analysis of an internally-cooled liquid desiccant dehumidifier[J]. Building and Environment, 2013, 63: 1-10.
7	Lun W, Li K N, Liu B, et al. Experimental analysis of a novel internally-cooled dehumidifier with self-cooled liquid desiccant[J]. Building and Environment, 2018, 141: 117-126.
8	常晓敏, 刘晓华, 江亿. 内冷型溶液除湿器的热质交换分析及流型比较研究[J]. 太阳能学报, 2009, 30(2): 170-176.
	Chang X M, Liu X H, Jiang Y. Research on the heat and mass transfer performance and flow-pattern comparison of the internally-cooled liquid desiccant dehumidifers[J]. Acta Energiae Solaris Sinica, 2009, 30(2): 170-176.
9	张凡, 殷勇高. 一种低位热驱动除湿冷却空调系统的热性能分析[J]. 化工学报, 2016, 67: 275-283.
	Zhang F, Yin Y G. Thermal performance analysis of liquid desiccant evaporative cooling air-condetioning system driven by low-grade heat[J]. CIESC Journal, 2016, 67: 275-283.
10	高文忠, 柳建华, 章学来. 太阳能叉流溶液除湿空调除湿性能实验分析[J]. 太阳能学报, 2012, 33(9): 1547-1552.
	Gao W Z, Liu J H, Zhang X L. Experimental analysis of dehumidifier in the solar-driven cross-flow liquid desiccant air conditioning[J]. Acta Energiae Solaris Sinica, 2012, 33(9): 1547-1552.
11	彭冬根, 罗丹婷, 程小松. 热回收型太阳能分级溶液集热/再生系统模型及环境适用性分析[J]. 化工学报, 2017, 68(8): 3242-3249.
	Peng D G, Luo D T, Cheng X S. Modeling and environmental applicability of solar solution grading collector/regenerator system with heat recovery[J]. CIESC Journal, 2017, 68(8): 3242-3249.
12	程清, 张小松. 一种双级光电光热电渗析再生系统性能研究[J]. 太阳能学报, 2015, 36(8): 1890-1894.
	Cheng Q, Zhang X S. Performance analysis of double stage PV/T electrodialysis regeneration system[J]. Acta Energiae Solaris Sinica, 2015, 36(8): 1890-1894.
13	殷勇高, 潘雄伟, 陈瑶, 等. 热空气用于溶液再生实验研究与能效分析[J].工程热物理学报, 2013, 34(4): 596-600.
	Yin Y G, Pan X W, Chen Y, et al. Experimental study and energy efficiency analysis of liquid desiccant regeneration using hot air[J]. Journal of Engineering Thermophysics, 2013, 34(4): 596-600.
14	Liu X H, Jiang Y, Chang X M, et al. Experimental investigation of the heat and mass transfer between air and liquid desiccant in a cross-flow regenerator[J]. Renewable Energy, 2007, 32(10): 1623-1636.
15	Liu X H, Jiang Y, Yi X Q. Effect of regeneration mode on the performance of liquid desiccant packed bed regenerator[J]. Renewable Energy, 2009, 34(1): 209-216.
16	戴智超. 不同填料溶液除湿/再生器及热质传递性能研究比较[D]. 南京: 东南大学, 2015.
	Dai Z C. Study on different type of fillers liquid dehumidifer/regenerator and their comparison about heat and mass transfer performance[D]. Nanjing: Southeast University, 2015.
17	殷勇高, 郑宝军, 高龙飞,等. 一种新的Z型填料及其溶液再生性能[J]. 化工学报, 2014, 65: 280-285.
	Yin Y G, Zheng B J, Gao L F, et al. A novel Z-type packing used for desiccant regenerator[J]. CIESC Journal, 2014, 65: 280-285.
18	钱俊飞, 殷勇高, 潘雄伟, 等. 平板降膜溶液除湿再生过程实验研究及模型验证[J]. 化工学报, 2014, 65(6): 2070-2077.
	Qian J F， Yin Y G, Pan X W, et al. Experimental investigation and model validation for liquid desiccant dehumidification and regeneration in falling-film plate[J]. CIESC Journal, 2014, 65(6): 2070-2077.
19	姚晔, 连之伟, 刘世清. 超声波强化再生除湿的除湿空调装置: 200510110441.8[P]. 2005-11-17.
	Yao Y, Lian Z W, Liu S Q. Ultrasound-atomizing regeneration/ dehumidification for liquid desiccant air conditioning system: 200510110441.8[P]. 2005-11-17.
20	Wang L, Lian Z W. Improvement of conventional liquid desiccant dehumidification technology[J]. Journal of Southeast University, 2010, 26(2): 212-216.
21	Yao Y, Zhang W J, He B X. Investigation on the kinetic models for the regeneration of silica gel by hot air combined with power ultrasonic[J]. Energy Conversion and Management, 2011, 52(11): 3319-3326.
22	Yao Y. Research and application of ultrasound in HVAC field: a review[J]. Renewable and Sustainable Energy Reviews, 2016, 58: 52-68.
23	王俐, 连之伟, 刘蔚巍. 结合超声雾化技术的液体除湿系统分析[J]. 中南大学学报(自然科学版), 2011, 42(1): 240-246.
	Wang L, Lian Z W, Liu W W. Analysis of liquid-desiccant dehumidifying system combined with ultrasound atomization technology[J]. Journal of Central South University (Science and Technology), 2011, 42(1): 240-246.
24	Yang Z L, Zhang K S, Hwang Y, et al. Performance investigation on the ultrasonic atomization liquid desiccant regeneration system[J]. Applied Energy, 2016, 171: 12-25.
25	殷勇高, 李士强, 张小松. 绝热型和内热型再生过程热性能对比[J]. 化工学报, 2010, 61: 157-163.
	Yin Y G, Li S Q, Zhang X S. Comparative study on dynamic performance of internally heated and adiabatic regenerators [J]. CIESC Journal, 2010, 61: 157-163.
26	Yin Y G, Zhang X S. Comparative study on internally heated and adiabatic regenerators in liquid desiccant air conditioning system[J]. Building and Environment, 2010, 45(8): 1799-1807.
27	Yin Y G, Zhang X S, Peng D G, et al. Model validation and case study on internally cooled/heated dehumidifier/regenerator of liquid desiccant systems[J]. International Journal of Thermal Sciences, 2009, 48: 1664-1671.
28	Liu J, Zhang T, Liu X H, et al. Experimental analysis of an internally-cooled/heated liquid desiccant dehumidifier/regenerator made of thermally conductive plastic[J]. Energy and Buildings, 2015, 99: 75-86.
29	王琴, 吴薇, 刘松松. 内热型与绝热型溶液再生器再生过程性能[J]. 化工学报, 2016, 67: 186-194.
	Wang Q, Wu W, Liu S S. Performance of regeneration processes of internally heated and adiabatic regenerators[J]. CIESC Journal, 2016, 67: 186-194.
30	Conde M R. Properties of aqueous solutions of lithium and calcium chlorides: formulations for use in air conditioning equipment design[J]. International Journal of Thermal Sciences, 2004, 43(4): 367-382.
31	Wen T, Lu L, Yang H, et al. Investigation on the regeneration and corrosion characteristics of an anodized aluminum plate regenerator[J]. Energies, 2018, 11(5): 1209-1215.

[1]	常明慧, 王林, 苑佳佳, 曹艺飞. 盐溶液蓄能型热泵循环特性研究[J]. 化工学报, 2023, 74(S1): 329-337.
[2]	金正浩, 封立杰, 李舒宏. 氨水溶液交叉型再吸收式热泵的能量及分析[J]. 化工学报, 2023, 74(S1): 53-63.
[3]	车睿敏, 郑文秋, 王小宇, 李鑫, 许凤. 基于离子液体的纤维素均相加工研究进展[J]. 化工学报, 2023, 74(9): 3615-3627.
[4]	程小松, 殷勇高, 车春文. 不同工质在溶液除湿真空再生系统中的性能对比[J]. 化工学报, 2023, 74(8): 3494-3501.
[5]	文兆伦, 李沛睿, 张忠林, 杜晓, 侯起旺, 刘叶刚, 郝晓刚, 官国清. 基于自热再生的隔壁塔深冷空分工艺设计及优化[J]. 化工学报, 2023, 74(7): 2988-2998.
[6]	卫雪岩, 钱勇. 微米级铁粉燃料中低温氧化反应特性及其动力学研究[J]. 化工学报, 2023, 74(6): 2624-2638.
[7]	陈科, 杜理, 曾英, 任思颖, 于旭东. 四元体系LiCl+MgCl₂+CaCl₂+H₂O 323.2 K相平衡研究及计算[J]. 化工学报, 2023, 74(5): 1896-1903.
[8]	刘尚豪, 贾胜坤, 罗祎青, 袁希钢. 基于梯度提升决策树的三组元精馏流程结构最优化[J]. 化工学报, 2023, 74(5): 2075-2087.
[9]	潘煜, 王子航, 王佳韵, 王如竹, 张华. 基于可得然-氯化锂复合吸附剂的除湿换热器热湿性能研究[J]. 化工学报, 2023, 74(3): 1352-1359.
[10]	陈瑞哲, 程磊磊, 顾菁, 袁浩然, 陈勇. 纤维增强树脂复合材料化学回收技术研究进展[J]. 化工学报, 2023, 74(3): 981-994.
[11]	周璇, 李孟亚, 孙杰, 岑振凯, 吕强三, 周立山, 王海涛, 韩丹丹, 龚俊波. 添加剂对氨基酸晶体生长的影响[J]. 化工学报, 2023, 74(2): 500-510.
[12]	黄宽, 马永德, 蔡镇平, 曹彦宁, 江莉龙. 油脂催化加氢转化制备第二代生物柴油研究进展[J]. 化工学报, 2023, 74(1): 380-396.
[13]	鲁文静, 李先锋. 液流电池多孔离子传导膜研究进展[J]. 化工学报, 2023, 74(1): 192-204.
[14]	李彬, 宋文明, 杨坤龙, 姜爽, 张天永. 水系有机液流电池活性材料的分子工程研究进展[J]. 化工学报, 2022, 73(7): 2806-2818.
[15]	陈永安, 周安宁, 李云龙, 石智伟, 贺新福, 焦卫红. 磁性MgFe₂O₄及其核壳催化剂制备与煤热解性能研究[J]. 化工学报, 2022, 73(7): 3026-3037.