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学者姓名：刘忠宝
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Abstract ：
The efficiency of household dehumidifiers is affected by air temperature and the temperature used for regeneration. A regeneration temperature that is too high can lead to increased energy use, heat build-up in the desiccant wheel, and lower dehumidification efficiency. In this study, we developed a LiCl@Al-Fum composite material and evaluated it through physical characterization and module testing. The results show that the LiCl@Al-Fum composite with a 20% mass fraction is particularly effective as a desiccant material. Additionally, a 15% volume concentration of neutral silica sol was identified as the optimal binder concentration. A comparative analysis of the effects of glass-fiber desiccant wheels (GF DWs), aluminum desiccant wheels (Al DWs), and commercial desiccant wheels (CM DWs) on household dehumidifier performance revealed that the Al DWs outperformed the CM DWs, showing a 13% improvement in the dehumidification rate and a 12.56% increase in the DCPP. An increase in the dehumidifier structure led to increases in the dehumidification rate by 11.8%, 11.9%, and 10% and in the DCPP by 11.6%, 12.1%, and 10%, respectively. Moreover, the modifications resulted in a 3.85 degrees C, 3.34 degrees C, and 3.8 degrees C decrease in the temperature.
Keyword ：
energy saving energy saving metal-organic framework metal-organic framework composite material composite material household dehumidifier household dehumidifier desiccant wheel desiccant wheel
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| GB/T 7714 | Liu, Zhongbao , Kong, Fanzhao , Zhao, Zhi et al. Performance Investigation and Optimization of Composite Materials in Household Dehumidifiers [J]. | BUILDINGS , 2024 , 14 (5) . |
| MLA | Liu, Zhongbao et al. "Performance Investigation and Optimization of Composite Materials in Household Dehumidifiers" . | BUILDINGS 14 . 5 (2024) . |
| APA | Liu, Zhongbao , Kong, Fanzhao , Zhao, Zhi , Wang, Zepeng , Liu, Yimo , Qie, Zhipeng . Performance Investigation and Optimization of Composite Materials in Household Dehumidifiers . | BUILDINGS , 2024 , 14 (5) . |
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Abstract ：
Although absorption technology is environment-friendly and energy-saving, the coefficient of performance (COP) of absorption systems is comparatively low. The absorber, a crucial component of these systems, is one of the important factors that influence the absorption system COP, and its efficiency significantly influences the system's overall performance. Therefore, absorber performance needs to be improved to increase the COP. Generally, these four approaches are adopted to increase the absorber performance: enhancing heat and mass transfer by upgrading the structure, shape, and surface of the heat exchanger tubes, adding additives in the working solution, increasing absorption interface area by employing an atomizer and ultrasound inside the absorber, and applying a magnetic field around the absorber. This paper reviews the absorption enhancement by a magnetic field. The configurations of absorption experimental setups employing a magnetic field, the methods to build a magnetic field in absorption systems, and the influence of magnetic field intensity and its direction on absorption performance are all thoroughly reviewed. Insights about working solutions and nanoparticles employed in magnetized absorption systems are presented. Furthermore, the numerical modeling of absorption enhancement by an external magnetic field and the prospective research direction are also discussed. It is expected that this work will help in a more profound understanding of absorption enhancement by the magnetic field and provide a base for further improvements.
Keyword ：
Absorption enhancement Absorption enhancement COP COP Working solution Working solution Nanoparticles Nanoparticles Magnetic field Magnetic field Absorption systems Absorption systems
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| GB/T 7714 | Kumar, Suresh , Liu, Zhongbao , Sun, Han . Application of magnetic field in the absorption systems: A review [J]. | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS , 2024 , 610 . |
| MLA | Kumar, Suresh et al. "Application of magnetic field in the absorption systems: A review" . | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 610 (2024) . |
| APA | Kumar, Suresh , Liu, Zhongbao , Sun, Han . Application of magnetic field in the absorption systems: A review . | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS , 2024 , 610 . |
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Abstract ：
Rotary dehumidification, a key method for continuous solid adsorption dehumidification, is extensively utilised in various industrial and practical applications. The performance of the adsorbent within the desiccant wheel is a major determinant of its energy efficiency in practical applications. While studies on Metal Organic Frameworks (MOFs) and polymer desiccant wheels exist, the majority of rotary dehumidification systems continue to employ traditional adsorbents like silica gel and zeolite, which are plagued by low dehumidification capacity and high energy consumption issues. Super hygroscopic hydrogel, enhanced with a hygroscopic agent, has gained prominence in air treatment because of its outstanding hygroscopicity and low regeneration temperature. With the goal of integrating advanced materials into practical engineering applications and mitigating the heat and mass transfer loss and adsorption/desorption performance degradation due to volume expansion and viscous agglomeration post-water uptake in large-scale super hygroscopic hydrogel applications, this study successfully developed a hydrogel wheel, measuring 350 mm in diameter and 200 mm in thickness, using a honeycomb-shaped glass fibre paper substrate. Experimental findings demonstrate that the hydrogel desiccant wheel outperforms both the MOF and commercial low-temperature silica gel wheels under all tested environmental conditions. This advantage is particularly noticeable at 15 degree celsius and 30 % Relative Humidity (RH), where the moisture content differential (Delta d) in the hydrogel system is 2.96 g/kg, 1.89 times greater than the MOF system's 1.56 g/kg and 5.19 times higher than the silica gel's 0.57 g/kg. Furthermore, the controlled variable method was used to assess the impact of each operational parameter on the hydrogel wheel's performance in both low and high moisture conditions, offering design insights for engineering applications.
Keyword ：
Desiccant wheel Desiccant wheel Efficiency optimisation Efficiency optimisation Hydrogel Hydrogel Rotary dehumidifier Rotary dehumidifier Performance comparison Performance comparison
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| GB/T 7714 | Liu, Yimo , Liu, Zhongbao , Wang, Zepeng et al. Experimental evaluation of a hydrogel composite desiccant wheel for dehumidification with high water uptake and low regeneration temperature [J]. | APPLIED THERMAL ENGINEERING , 2024 , 257 . |
| MLA | Liu, Yimo et al. "Experimental evaluation of a hydrogel composite desiccant wheel for dehumidification with high water uptake and low regeneration temperature" . | APPLIED THERMAL ENGINEERING 257 (2024) . |
| APA | Liu, Yimo , Liu, Zhongbao , Wang, Zepeng , Sun, Weiming , Kong, Fanzhao . Experimental evaluation of a hydrogel composite desiccant wheel for dehumidification with high water uptake and low regeneration temperature . | APPLIED THERMAL ENGINEERING , 2024 , 257 . |
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Abstract ：
本实用新型涉及光伏发电装置散热技术领域，提供一种基于辐射制冷的光伏发电装置，包括工质泵以及制冷发电组件，制冷发电组件包括依次叠层设置的辐射制冷涂层、导热箱、载冷剂箱和光伏板；辐射制冷涂层设于导热箱的外表面；载冷剂箱用于容纳载冷剂，载冷剂箱与导热箱连通，载冷剂箱和导热箱均与工质泵连通，工质泵用于驱动载冷剂在载冷剂箱以及导热箱之间循环流动。本实用新型的基于辐射制冷的光伏发电装置，通过工质泵驱动载冷剂在导热箱与载冷剂箱之间循环流通，以及辐射制冷涂层的辐射散热，使载冷剂积攒冷量，并通过积攒的冷量对光伏板进行降温，有效解决了现有技术中冷却效果不佳、冷却成本较高以及难以大规模使用的问题。
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| GB/T 7714 | 刘忠宝 , 赵建勋 , 柳鑫宇 et al. 基于辐射制冷的光伏发电装置 : CN202320579597.4[P]. | 2023-03-22 . |
| MLA | 刘忠宝 et al. "基于辐射制冷的光伏发电装置" : CN202320579597.4. | 2023-03-22 . |
| APA | 刘忠宝 , 赵建勋 , 柳鑫宇 , 张浚麟 , 胡浩然 , 王沛贤 . 基于辐射制冷的光伏发电装置 : CN202320579597.4. | 2023-03-22 . |
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Abstract ：
A single-bed finned tube adsorption refrigeration system model was established to compare the adsorption characteristics of three metal organic framework materials, MIL-101(Cr), MIL-101(Cr)/CaCl2-10%, MIL-101(Cr)/ CaCl2-20%. The change of material properties under different thickness/length/number of fins was characterized, and the most suitable adsorption bed structure for different materials was obtained. The results show that the number of fins has little effect on the COP and specific cooling power of the material in the system. Choosing thinner fins can improve the COP of the system. With the increase of fin height, the COP showed a trend of increasing first and then decreasing. The three materials, MIL101(Cr), MIL-101(Cr)/CaCl2-10%, MIL-101(Cr)/CaCl2-20%, obtained the highest COP when the fin heights were 50 mm, 60 mm, and 70 mm, respectively. The maximum specific cooling power was obtained when the fin heights were 20 mm, 60 mm, and 70 mm, which were 21.7 W/kg, 90.1 W/kg, and 174.5 W/kg, respectively. The height of the fin has a great influence on the performance of the system. When designing the adsorption bed, the appropriate fin height should be selected for the specific adsorbent.
Keyword ：
performance performance adsorption adsorption MIL-101(Cr) MIL-101(Cr) adsorbent adsorbent simulation simulation
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| GB/T 7714 | Liu, Zhongbao , Li, Shijie , Zhao, Banghua et al. NUMERICAL STUDY ON THE PERFORMANCE OF ADSORPTION REFRIGERATION SYSTEM WITH FINNED BED STRUCTURE PAIRED WITH MOF-WATER AS WORKING FLUID [J]. | THERMAL SCIENCE , 2023 , 27 (4A) : 2723-2738 . |
| MLA | Liu, Zhongbao et al. "NUMERICAL STUDY ON THE PERFORMANCE OF ADSORPTION REFRIGERATION SYSTEM WITH FINNED BED STRUCTURE PAIRED WITH MOF-WATER AS WORKING FLUID" . | THERMAL SCIENCE 27 . 4A (2023) : 2723-2738 . |
| APA | Liu, Zhongbao , Li, Shijie , Zhao, Banghua , Sun, Han . NUMERICAL STUDY ON THE PERFORMANCE OF ADSORPTION REFRIGERATION SYSTEM WITH FINNED BED STRUCTURE PAIRED WITH MOF-WATER AS WORKING FLUID . | THERMAL SCIENCE , 2023 , 27 (4A) , 2723-2738 . |
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Abstract ：
With the development of the economy, improving energy efficiency and saving energy have become important issues that need to be addressed. In terms of building energy efficiency, combining phase change heat storage material with floor radiation heating is an effective way to improve energy utilization efficiency. In this paper, a composite phase change heat storage material used in radiant floor heating was introduced. Based on the selected materials, experiments on floor radiation heating system based on heat storage in different environments during the heating season were conducted. The results showed that thermal conductivity of composite phase change heat storage material increased by a maximum of 97.2%, and the maximum heat release time can be obtained 6 h. By using this radiant floor heating system, a balance between heating comfort and economy has been achieved, so this system will have a good applied foreground.
Keyword ：
Building energy conservation Building energy conservation Phase-change heat storage material Phase-change heat storage material Thermal energy storage Thermal energy storage
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| GB/T 7714 | Liu, Zhongbao , Wei, Ziyan , Teng, Ruonan et al. Research on performance of radiant floor heating system based on heat storage [J]. | APPLIED THERMAL ENGINEERING , 2023 , 231 . |
| MLA | Liu, Zhongbao et al. "Research on performance of radiant floor heating system based on heat storage" . | APPLIED THERMAL ENGINEERING 231 (2023) . |
| APA | Liu, Zhongbao , Wei, Ziyan , Teng, Ruonan , Sun, Han , Qie, Zhipeng . Research on performance of radiant floor heating system based on heat storage . | APPLIED THERMAL ENGINEERING , 2023 , 231 . |
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Abstract ：
本文采用白金板法测定了正辛醇浓度及温度对不同溴化锂浓度水溶液表面张力的影响，使用静态池吸收实验系统测定了含正辛醇的溴化锂水溶液的吸收率。研究结果表明，随溴化锂浓度的增加，无添加剂时，溶液表面张力增加，有添加剂时，溶液表面张力降低；随温度升高，无添加剂时，溶液表面张力减小，有添加剂时，正辛醇添加浓度小于100 mg/kg时，溶液表面张力增加，添加浓度大于100 mg/kg时，溶液表面张力减小。随着正辛醇浓度的增加，小于临界胶束浓度（CMC）时，溴化锂水溶液的吸收率急剧增加，大于CMC时吸收率值变化很小。质量分数为55%的溴化锂水溶液，正辛醇的添加浓度为300 mg/kg时，水蒸气的吸收率比未添加正辛醇时提高了27.6%。临界胶束浓度CMC点和水蒸气平均吸收率峰值点都随溴化锂浓度的增加向正辛醇浓度减小的方向移动。
Keyword ：
吸收率 吸收率 表面张力 表面张力 临界胶束浓度 临界胶束浓度 溴化锂水溶液 溴化锂水溶液
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| GB/T 7714 | 王鲁宁 , 孙晗 , 刘忠宝 et al. 添加正辛醇对溴化锂水溶液表面张力及吸收率的影响 [J]. | 制冷技术 , 2023 , 43 (01) : 23-29 . |
| MLA | 王鲁宁 et al. "添加正辛醇对溴化锂水溶液表面张力及吸收率的影响" . | 制冷技术 43 . 01 (2023) : 23-29 . |
| APA | 王鲁宁 , 孙晗 , 刘忠宝 , 张晓亮 . 添加正辛醇对溴化锂水溶液表面张力及吸收率的影响 . | 制冷技术 , 2023 , 43 (01) , 23-29 . |
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Abstract ：
Photovoltaic (PV) power generation, which converts sunlight into electricity, stands as a pivotal mode of solar energy utilization. The thermal effect poses a significant challenge for all types of PV panels under real operating conditions, as it diminishes both the photovoltaic conversion efficiency and the lifespan of the PV panels. This paper presents a novel passive cooling approach for silicon-based photovoltaic panels, employing night-time hygroscopic hydrogel adsorption, daytime desorption, and subsequent water evaporation for cooling. Both laboratory and outdoor experiments were conducted to validate this strategy. Experimental results reveal that under simulated laboratory light of 1 kW m- 2, the hydrogel cooling layer delivers an average cooling power of 288.2 W m- 2. It lowers the PV panel temperature by 9.9 degrees C and enhances both the maximum power and effi-ciency at equilibrium by 5.92% and 5.93%, respectively. Outdoor experiments in Beijing, China, during summer demonstrated that this method reduced the average daytime temperature of the PV plate by 7.1 degrees C and increased the average maximum power by 5.21%. The hydrogel layer's high hygroscopicity enables it to support passive cooling effectively all day. Passive cooling strategies for PV panels, leveraging the atmospheric water harvesting cycle, face fewer application constraints. They offer the potential to increase power generation and reduce CO2 emissions from PV plants both now and in the future.
Keyword ：
Panel temperature Panel temperature Solar energy Solar energy Water vapor sorption and evaporation Water vapor sorption and evaporation PV passive cooling PV passive cooling Hydrogel Hydrogel
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| GB/T 7714 | Liu, Yimo , Liu, Zhongbao , Wang, Zepeng et al. Photovoltaic passive cooling via water vapor sorption-evaporation by hydrogel [J]. | APPLIED THERMAL ENGINEERING , 2023 , 240 . |
| MLA | Liu, Yimo et al. "Photovoltaic passive cooling via water vapor sorption-evaporation by hydrogel" . | APPLIED THERMAL ENGINEERING 240 (2023) . |
| APA | Liu, Yimo , Liu, Zhongbao , Wang, Zepeng , Sun, Weiming , Kong, Fanzhao . Photovoltaic passive cooling via water vapor sorption-evaporation by hydrogel . | APPLIED THERMAL ENGINEERING , 2023 , 240 . |
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Abstract ：
Reducing the consumption of high-grade energy on the regeneration side is crucial to decreasing the energy consumption of the desiccant wheel system. Metal-organic framework desiccants exhibit superior moisture ab-sorption performance. However, there has been no research on the application of metal-organic framework materials in desiccant wheel systems for low-grade heat source regeneration. To address this research gap, this study applied a composite adsorbent of the metal-organic framework in a heat pump-desiccant wheel system and experimentally evaluated the performance of the heat pump-metal-organic framework desiccant wheel system using low-grade heat sources under different operating conditions. A comparison was made with electrically heated desiccant wheel systems and heat pump-desiccant wheel systems using traditional silica gel adsorbents. The results showed that the optimal desiccant wheel rotational speed was 8.63 r & sdot;h-1, and the optimal airflow was 300 m3 & sdot;h-1. The energy consumption of the heat pump-metal-organic framework desiccant wheel system was only 42.77% of that of the electrically heated desiccant wheel system, and its dehumidification energy factor was 2.07, which is higher than that of the heat pump-silica gel desiccant wheel system. This demonstrates the feasibility and efficiency of utilizing low-grade heat sources for regeneration using metal-organic framework desiccants in practical applications.
Keyword ：
Energy saving Energy saving Dehumidification Dehumidification Metal-organic framework Metal-organic framework Low-grade thermal energy Low-grade thermal energy Desiccant wheel Desiccant wheel
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| GB/T 7714 | Liu, Zhongbao , Gong, Haohui , Cheng, Chaojie et al. Experimental evaluation of metal-organic framework desiccant wheel combined with heat pump [J]. | APPLIED THERMAL ENGINEERING , 2023 , 236 . |
| MLA | Liu, Zhongbao et al. "Experimental evaluation of metal-organic framework desiccant wheel combined with heat pump" . | APPLIED THERMAL ENGINEERING 236 (2023) . |
| APA | Liu, Zhongbao , Gong, Haohui , Cheng, Chaojie , Qie, Zhipeng . Experimental evaluation of metal-organic framework desiccant wheel combined with heat pump . | APPLIED THERMAL ENGINEERING , 2023 , 236 . |
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Abstract ：
The water sorption and desorption properties of solid adsorbent materials are crucial in rotary dehumidification systems. Metal organic frameworks (MOFs) and hydrogels are mostly at the laboratory stage due to factors like the synthesis process and yield. In this study, we utilized an eco-friendly and large-scale synthesis method to prepare polyacrylamide (PAM) hydrogels (yielding approximately 500 mL from a single polymerization). Subsequently, PAM was then coated onto glass fiber paper (GFP), which serves as a commonly employed substrate in desiccant wheels. By incorporating the hygroscopic salt LiCl and optimizing the content of each component, the water sorption performance of the composite was notably improved. The water sorption and desorption performances, as well as cycling stability, were evaluated and compared with composites containing aluminum fumarate, LiCl, and GFP (AlFum-LiCl&GFP). The results revealed that PAM-LiCl&GFP outperformed AlFum-LiCl&GFP in terms of sorption capacity throughout various relative humidity (RH) levels. It achieved a water uptake of 1.06 g center dot g-1 at 25 degrees C and 30% RH, corresponding to a water sorption rate coefficient K of 15.32 x 10-4 s-1. Furthermore, the lower desorption temperature (60 degrees C) resulting in a desorption ratio of 82.6%, along with the excellent cycling stability and effective performance as a desiccant wheel module, provide evidence for the potential application of PAM-LiCl&GFP in desiccant wheels.
Keyword ：
dehumidification dehumidification polyacrylamide polyacrylamide aluminum fumarate aluminum fumarate desiccant wheel desiccant wheel water sorption water sorption
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| GB/T 7714 | Liu, Yimo , Liu, Zhongbao , Wang, Zepeng et al. Enhanced Water Sorption Performance of Polyacrylamide & Glass Fiber Paper Composites: Investigation and Comparison of Application in Desiccant Wheels [J]. | POLYMERS , 2023 , 15 (18) . |
| MLA | Liu, Yimo et al. "Enhanced Water Sorption Performance of Polyacrylamide & Glass Fiber Paper Composites: Investigation and Comparison of Application in Desiccant Wheels" . | POLYMERS 15 . 18 (2023) . |
| APA | Liu, Yimo , Liu, Zhongbao , Wang, Zepeng , Sun, Weiming . Enhanced Water Sorption Performance of Polyacrylamide & Glass Fiber Paper Composites: Investigation and Comparison of Application in Desiccant Wheels . | POLYMERS , 2023 , 15 (18) . |
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