2019 Vol. 34, No. 5
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2019, 34(5)
:1-9.
doi: 10.3969/j.issn.2096-1553.2019.05.001
Abstract:
Potato protein microgel (PPM2,PPM4,PPM6,PPM8) were prepared at different mass fractions (2%, 4%, 6%, 8%).The particle size, Zeta-potential, fluorescence characteristic, emulsifying activity, emulsion stability and microstructure of of microgel were investigated. The effect of potato protein microgel on the emulsification characteristics of Pickering emulsion was studied. The results showed that the particle size of the microgel particles increased significantly (116.31~181.99 nm) with the increase of protein fraction during microgel preparation. The Zeta-potentials of PPM2, PPM4 and PPM6 were about 30 mV and higher than that of the control group. The fluorescence intensity of PPM2, PPM4 and PPM6 was higher than that of the control group, while the fluorescence intensity of PPM8 was lower than that of the control group. Compared with the control group, the microgel significantly improved the emulsion activity and emulsion stability of the Pickering emulsion.The microstructure results showed that the surface of the control group and all potato protein microgel were smooth, the control group was spherical, the potato protein microgel was aggregated in a sheet form, and the aggregation unit was larger with the increase of the potato protein mass fraction.
Potato protein microgel (PPM2,PPM4,PPM6,PPM8) were prepared at different mass fractions (2%, 4%, 6%, 8%).The particle size, Zeta-potential, fluorescence characteristic, emulsifying activity, emulsion stability and microstructure of of microgel were investigated. The effect of potato protein microgel on the emulsification characteristics of Pickering emulsion was studied. The results showed that the particle size of the microgel particles increased significantly (116.31~181.99 nm) with the increase of protein fraction during microgel preparation. The Zeta-potentials of PPM2, PPM4 and PPM6 were about 30 mV and higher than that of the control group. The fluorescence intensity of PPM2, PPM4 and PPM6 was higher than that of the control group, while the fluorescence intensity of PPM8 was lower than that of the control group. Compared with the control group, the microgel significantly improved the emulsion activity and emulsion stability of the Pickering emulsion.The microstructure results showed that the surface of the control group and all potato protein microgel were smooth, the control group was spherical, the potato protein microgel was aggregated in a sheet form, and the aggregation unit was larger with the increase of the potato protein mass fraction.
2019, 34(5)
:10-19.
doi: 10.3969/j.issn.2096-1553.2019.05.002
Abstract:
Wheat starch was used as the research object,and ultrasonic treatment was carried out at different times (0 min,10 min,20 min,30 min) so as to investigate the effect of ultrasonic treatment on its aggregation structure,solubility,swelling degree,pasting properties and rheological properties.The results showed that ultrasonic treatment disrupted the granular structure,crystalline structure and short-range ordered structure of wheat starch,inducing the amorphization of starch aggregation structure were deeper.And these transformations were more obvious with the increase of ultrasound time.Moreover,due to the destruction of starch aggregation structure,the solubility,swelling degree,peak viscosity,final viscosity and setback value increased,but the disintegration value reduced and the rigidity of starch gel decreased.
Wheat starch was used as the research object,and ultrasonic treatment was carried out at different times (0 min,10 min,20 min,30 min) so as to investigate the effect of ultrasonic treatment on its aggregation structure,solubility,swelling degree,pasting properties and rheological properties.The results showed that ultrasonic treatment disrupted the granular structure,crystalline structure and short-range ordered structure of wheat starch,inducing the amorphization of starch aggregation structure were deeper.And these transformations were more obvious with the increase of ultrasound time.Moreover,due to the destruction of starch aggregation structure,the solubility,swelling degree,peak viscosity,final viscosity and setback value increased,but the disintegration value reduced and the rigidity of starch gel decreased.
2019, 34(5)
:20-26.
doi: 10.3969/j.issn.2096-1553.2019.05.003
Abstract:
Bamboo shoot dietary fiber was added into dough to study the processing characteristics and moisture distribution of the repeated freeze-thaw dough.The results showed that the hardness of the dough in the control group increased first and then decreased,the viscosity and the chewiness increased,the elasticity became smaller.However,the hardness,viscosity and elasticity of the dough added with BSDF had not been significantly affected during the process of repeated freezing and thawing.When the number of repeated freeze-thaw cycles exceeded one time,the modulus of elasticity and viscosity of the BSDF dough increased,and the loss angle tangent decreased.During the process of repeated freezing and thawing,the deep layer bound moisture content of the dough in the control group decreased,while the weakly bound water and free water content increased.However,the addition of BSDF made the deep layer bound moisture content increased,the weakly bound moisture content decreased,and the free moisture content did not change significantly.
Bamboo shoot dietary fiber was added into dough to study the processing characteristics and moisture distribution of the repeated freeze-thaw dough.The results showed that the hardness of the dough in the control group increased first and then decreased,the viscosity and the chewiness increased,the elasticity became smaller.However,the hardness,viscosity and elasticity of the dough added with BSDF had not been significantly affected during the process of repeated freezing and thawing.When the number of repeated freeze-thaw cycles exceeded one time,the modulus of elasticity and viscosity of the BSDF dough increased,and the loss angle tangent decreased.During the process of repeated freezing and thawing,the deep layer bound moisture content of the dough in the control group decreased,while the weakly bound water and free water content increased.However,the addition of BSDF made the deep layer bound moisture content increased,the weakly bound moisture content decreased,and the free moisture content did not change significantly.
2019, 34(5)
:27-31.
doi: 10.3969/j.issn.2096-1553.2019.05.004
Abstract:
38 yeast strains screened from the surface of the fruit were used for the fermentation of tobacco powder, and a strain of yeast strain YG-4 capable of producing distinct floral and sweet fragrance was screened by sensory olfactory identification. The strain was further subjected to morphological identification, phenotypic identification and molecular biological identification. And the aroma components in fermented liquid of this strain wereanalyzed by GC-MS. The results showed that YG-4 strain was identified as Hanseniaspora sp. GC-MS analysis showed that the contents of esters, carbonyls, acids and hydrocarbons in YG-4 fermentation liquid decreased. However, the content of alcohols increased significantly. 1-phenyl-3-aminopyrazole in heterocycles also increased slightly. Although the content of some substances decreased,the contents of phenylethyl benzoate, 2-pentenoic acid, 1-phenyl-3-aminopyrazole and phenylethanol all increased, and the increase of these aroma components contributed to the improvement of fermentation broth aroma and produced characteristic aroma different from the control group.
38 yeast strains screened from the surface of the fruit were used for the fermentation of tobacco powder, and a strain of yeast strain YG-4 capable of producing distinct floral and sweet fragrance was screened by sensory olfactory identification. The strain was further subjected to morphological identification, phenotypic identification and molecular biological identification. And the aroma components in fermented liquid of this strain wereanalyzed by GC-MS. The results showed that YG-4 strain was identified as Hanseniaspora sp. GC-MS analysis showed that the contents of esters, carbonyls, acids and hydrocarbons in YG-4 fermentation liquid decreased. However, the content of alcohols increased significantly. 1-phenyl-3-aminopyrazole in heterocycles also increased slightly. Although the content of some substances decreased,the contents of phenylethyl benzoate, 2-pentenoic acid, 1-phenyl-3-aminopyrazole and phenylethanol all increased, and the increase of these aroma components contributed to the improvement of fermentation broth aroma and produced characteristic aroma different from the control group.
2019, 34(5)
:32-39.
doi: 10.3969/j.issn.2096-1553.2019.05.005
Abstract:
In the process of measuring the content of metal elements in cigarette soot by atomic absorption method, if the pre-treatment method was used directly, the clarity of the digesting solution was poor and the RSD of the measurement results were high. In order to solve this problem, a pre-treatment method of combined ashing and microwave digestion was proposed. The digestion acid system of microwave digestion and ashing conditions of the muffle furnace were optimized. The results showed that the acid system mainly affected the accuracy of the measurement results. When the volume ratio of HNO3, HF and H2O2 was 7:0.5:1.5, the microwave digestion effect was the best. The ashing mainly influenced the RSD of the results. When the sample quality was 0.10 g, the ashing temperature and time were taken at 600℃ and 60 min, respectively, RSD values matched well with predicted values. Compared with direct microwave digestion, the RSD of potassium, calcium, magnesium, iron, manganese, zinc, and copper elements dropped dramatically, using the dry-wet combination method. The results of recovery experiments showed that the RSD of each element was 1.33%~2.41% and the average recovery was 97.77%~102.05%. Above all, this method had favorable repeatability and accuracy, and could be used for reference in the selection of pretreatment methods for homogenized samples.
In the process of measuring the content of metal elements in cigarette soot by atomic absorption method, if the pre-treatment method was used directly, the clarity of the digesting solution was poor and the RSD of the measurement results were high. In order to solve this problem, a pre-treatment method of combined ashing and microwave digestion was proposed. The digestion acid system of microwave digestion and ashing conditions of the muffle furnace were optimized. The results showed that the acid system mainly affected the accuracy of the measurement results. When the volume ratio of HNO3, HF and H2O2 was 7:0.5:1.5, the microwave digestion effect was the best. The ashing mainly influenced the RSD of the results. When the sample quality was 0.10 g, the ashing temperature and time were taken at 600℃ and 60 min, respectively, RSD values matched well with predicted values. Compared with direct microwave digestion, the RSD of potassium, calcium, magnesium, iron, manganese, zinc, and copper elements dropped dramatically, using the dry-wet combination method. The results of recovery experiments showed that the RSD of each element was 1.33%~2.41% and the average recovery was 97.77%~102.05%. Above all, this method had favorable repeatability and accuracy, and could be used for reference in the selection of pretreatment methods for homogenized samples.
2019, 34(5)
:40-46.
doi: 10.3969/j.issn.2096-1553.2019.05.006
Abstract:
In order to further improve the sensory quality of cigarettes, the essence was extracted from the natural tangerine, and dripped as tangerine flavored breakable capsule with different quality fractions. Test cigarettes were rolled with filters containing tangerine flavored breakable capsule. The physicochemical index and sensory quality of test cigarettes were evaluated. The results showed that:1)Under the existing breakable capsule processing technology, stable and uniform breakable capsule could be prepared with the natural tangerine essence. 2)Compared with the control samples, the pressure drop of filter rods with capsules, the weight, draw resistance and ventilation rate of the cigarette samples increased. The release of tar and CO from the cigarette samples with breakable capsule decreased while the release of nicotine had no significant difference; After breakable capsule was crushed, the release of tar and CO increased to a certain extent, and the release of nicotine had no significant increase; 3)By adding breakable capsule, the stimulation of cigarettes was weakened, the aroma of the cigarettes was improved and enriched, meanwhile, the sensory quality and aspiration of interest of the cigarettes were enhanced significantly.
In order to further improve the sensory quality of cigarettes, the essence was extracted from the natural tangerine, and dripped as tangerine flavored breakable capsule with different quality fractions. Test cigarettes were rolled with filters containing tangerine flavored breakable capsule. The physicochemical index and sensory quality of test cigarettes were evaluated. The results showed that:1)Under the existing breakable capsule processing technology, stable and uniform breakable capsule could be prepared with the natural tangerine essence. 2)Compared with the control samples, the pressure drop of filter rods with capsules, the weight, draw resistance and ventilation rate of the cigarette samples increased. The release of tar and CO from the cigarette samples with breakable capsule decreased while the release of nicotine had no significant difference; After breakable capsule was crushed, the release of tar and CO increased to a certain extent, and the release of nicotine had no significant increase; 3)By adding breakable capsule, the stimulation of cigarettes was weakened, the aroma of the cigarettes was improved and enriched, meanwhile, the sensory quality and aspiration of interest of the cigarettes were enhanced significantly.
2019, 34(5)
:47-54.
doi: 10.3969/j.issn.2096-1553.2019.05.007
Abstract:
With copper as the base material, using simple chemical etching, the mixed acid solution of HCl, HNO3, HF (chemical etching solution A) and mixed solution of FeCl3, HCl (chemical etching solution B) was used to prepare the copper surface with superhydrophobic properties, and the wetting behavior was studied. The chemical etching solution B was selected to investigate the influence of main factors (etching time, FeCl3 addition amount, drying temperature, HCl addition amount) on the surface wetting behavior of the obtained copper. The results showed that the contact angles of the copper surface obtained by using the two electrolytes were 158.6° and 155.6°, respectively, and the surface had superhydrophobic properties. The etching time, FeCl3 addition amount, drying temperature, HCl addition amount and contact angle were positively correlated and then negatively correlated. The maximum contact angles were 153.6°, 152.6°, 153.5° and 152.0°, respectively. The corresponding conditions were 100 min, 2 g/L, 120℃, 3 mL/L.
With copper as the base material, using simple chemical etching, the mixed acid solution of HCl, HNO3, HF (chemical etching solution A) and mixed solution of FeCl3, HCl (chemical etching solution B) was used to prepare the copper surface with superhydrophobic properties, and the wetting behavior was studied. The chemical etching solution B was selected to investigate the influence of main factors (etching time, FeCl3 addition amount, drying temperature, HCl addition amount) on the surface wetting behavior of the obtained copper. The results showed that the contact angles of the copper surface obtained by using the two electrolytes were 158.6° and 155.6°, respectively, and the surface had superhydrophobic properties. The etching time, FeCl3 addition amount, drying temperature, HCl addition amount and contact angle were positively correlated and then negatively correlated. The maximum contact angles were 153.6°, 152.6°, 153.5° and 152.0°, respectively. The corresponding conditions were 100 min, 2 g/L, 120℃, 3 mL/L.
2019, 34(5)
:55-60.
doi: 10.3969/j.issn.2096-1553.2019.05.008
Abstract:
Using styrene as monomer, divinyl benzene as crosslinker and benzoyl peroxide as initiator,span80 as surfactant,monostyrene porous poly(styrene-divinyl benzene) microparticles were prepared by surfactant reverse micelle method. The main factors (surfactant dosage, stirring speed and electrolyte type) affecting the particle size and distribution of the microspheres were investigated. The results showed that the Tg of the microspheres was 170℃. With the increase of the amount of span80, the particle size of the microspheres first decreased and then increased. With the increase of the stirring speed, the particle size of the microspheres decreased.With the increase of the strength of the added electrolyte, the particle size of the microspheres decreased.
Using styrene as monomer, divinyl benzene as crosslinker and benzoyl peroxide as initiator,span80 as surfactant,monostyrene porous poly(styrene-divinyl benzene) microparticles were prepared by surfactant reverse micelle method. The main factors (surfactant dosage, stirring speed and electrolyte type) affecting the particle size and distribution of the microspheres were investigated. The results showed that the Tg of the microspheres was 170℃. With the increase of the amount of span80, the particle size of the microspheres first decreased and then increased. With the increase of the stirring speed, the particle size of the microspheres decreased.With the increase of the strength of the added electrolyte, the particle size of the microspheres decreased.
2019, 34(5)
:61-67.
doi: 10.3969/j.issn.2096-1553.2019.05.009
Abstract:
The effect of different reaction temperature, reaction pressure and the ratio of water to lignite on the H2 production by gasification of lignite in supercritical water was investigated by using lignite as raw material and intermittent high temperature and high pressure reactor. Then, the catalytic effect of Fe powder and Ni powder with different mass fractions on the production of H2 was studied separately. The experimental results showed that the increase of reaction temperature could greatly improve the yield of H2. The suitable reaction temperature was 405℃. The effect of reaction pressure on H2 production was not obvious, but the higher reaction pressure would slightly increase the yield of CH4, the appropriate reaction pressure was chosen as 23 MPa; higher ratio of water to lignite was conducive to the production of H2, but the cost would also increase, the appropriate ratio of water to lignite was selected as 10:1; the addition of metal catalyst Fe powder and Ni powder could significantly improve the yield of H2. When the mass fraction was low, the catalytic effect of Ni powder was better than that of Fe powder. When the mass fraction was higher, the catalytic effect of Fe powder was better.
The effect of different reaction temperature, reaction pressure and the ratio of water to lignite on the H2 production by gasification of lignite in supercritical water was investigated by using lignite as raw material and intermittent high temperature and high pressure reactor. Then, the catalytic effect of Fe powder and Ni powder with different mass fractions on the production of H2 was studied separately. The experimental results showed that the increase of reaction temperature could greatly improve the yield of H2. The suitable reaction temperature was 405℃. The effect of reaction pressure on H2 production was not obvious, but the higher reaction pressure would slightly increase the yield of CH4, the appropriate reaction pressure was chosen as 23 MPa; higher ratio of water to lignite was conducive to the production of H2, but the cost would also increase, the appropriate ratio of water to lignite was selected as 10:1; the addition of metal catalyst Fe powder and Ni powder could significantly improve the yield of H2. When the mass fraction was low, the catalytic effect of Ni powder was better than that of Fe powder. When the mass fraction was higher, the catalytic effect of Fe powder was better.
2019, 34(5)
:68-77.
doi: 10.3969/j.issn.2096-1553.2019.05.010
Abstract:
Starting from polymer membranes, inorganic membranes and organic-inorganic mixed matrix membranes, the progress of membrane materials for the separation of phenol-water and aniline-water systems by pervaporation technology in the past 20 years was reviewed. It was pointed out that the flux and separation factor of polymer membrane materials were low, and the trade-off effect was common, while the flux and separation factor of polyether copolyamide (PEBA) were kept at a high level, hybridization and other modification methods could be used to improve the separation performance; inorganic membrane materials had the disadvantages of poor mechanical properties, difficult processing and high cost, and related research contents were less; organic-inorganic mixed matrix membranes could combine the advantages of polymer membranes and inorganic membranes. The trade-off effect of the polymer membranes was effectively solved, but the compatibility of the inorganic particles with the polymer was not good, so that the membranes was prone to defects and the separation factor was lowered. In the future, the matrix membranes will become a hot research topic.By searching for particles that interact more strongly with the polymer, the compatibility of the doped particles with the polymer will be better, the dispersion will be more uniform, and the separation performance of the mixed matrix membranes will be improved.As the selection of porous materials, in addition to the development of new metal-organic framework MOFs materials, the modification of MOFs, the design of more efficient transport channels and so on are also a trend/development.
Starting from polymer membranes, inorganic membranes and organic-inorganic mixed matrix membranes, the progress of membrane materials for the separation of phenol-water and aniline-water systems by pervaporation technology in the past 20 years was reviewed. It was pointed out that the flux and separation factor of polymer membrane materials were low, and the trade-off effect was common, while the flux and separation factor of polyether copolyamide (PEBA) were kept at a high level, hybridization and other modification methods could be used to improve the separation performance; inorganic membrane materials had the disadvantages of poor mechanical properties, difficult processing and high cost, and related research contents were less; organic-inorganic mixed matrix membranes could combine the advantages of polymer membranes and inorganic membranes. The trade-off effect of the polymer membranes was effectively solved, but the compatibility of the inorganic particles with the polymer was not good, so that the membranes was prone to defects and the separation factor was lowered. In the future, the matrix membranes will become a hot research topic.By searching for particles that interact more strongly with the polymer, the compatibility of the doped particles with the polymer will be better, the dispersion will be more uniform, and the separation performance of the mixed matrix membranes will be improved.As the selection of porous materials, in addition to the development of new metal-organic framework MOFs materials, the modification of MOFs, the design of more efficient transport channels and so on are also a trend/development.
2019, 34(5)
:78-87.
doi: 10.3969/j.issn.2096-1553.2019.05.011
Abstract:
A bionic multi-mode moving mechanism was designed, which can realize the sliding, crawling and rolling sports modes.Based on the principle of bionics, the four-legged walking, flapping wing, and circular rolling creatures were used as bionic objects to abstract the motion structural unit equivalent to the bionic object.Through the screw theory of configuration design analysis, combined with the spatial geometric symmetry principle and the variable degree of freedom idea, the two equivalent unit bodies were symmetrically arranged to form a multi-mode mobile mechanism.The simulation results showed that the mechanism could achieve the expected motion mode, reasonable design, good stability and maneuverability.
A bionic multi-mode moving mechanism was designed, which can realize the sliding, crawling and rolling sports modes.Based on the principle of bionics, the four-legged walking, flapping wing, and circular rolling creatures were used as bionic objects to abstract the motion structural unit equivalent to the bionic object.Through the screw theory of configuration design analysis, combined with the spatial geometric symmetry principle and the variable degree of freedom idea, the two equivalent unit bodies were symmetrically arranged to form a multi-mode mobile mechanism.The simulation results showed that the mechanism could achieve the expected motion mode, reasonable design, good stability and maneuverability.
2019, 34(5)
:88-95.
doi: 10.3969/j.issn.2096-1553.2019.05.012
Abstract:
Aiming at the problem of poor lateral stability of wheeled mobile robots, the Simulink engine model and wheel steering model were built, and the actual speed and wheel angle were freely adjusted by the built-in PID closed-loop control system.According to the interface parameters of Carsim and Simulink, the signal transmission of the wheeled mobile robot transmission system model,the engine model and the steering model was implemented.The Simulink/Carsim joint simulation of the wheeled mobile robot was realized.The double shift line test results showed that the lateral stability of the wheeled mobile robot under joint simulation was higher than that of the traditional mobile robot.
Aiming at the problem of poor lateral stability of wheeled mobile robots, the Simulink engine model and wheel steering model were built, and the actual speed and wheel angle were freely adjusted by the built-in PID closed-loop control system.According to the interface parameters of Carsim and Simulink, the signal transmission of the wheeled mobile robot transmission system model,the engine model and the steering model was implemented.The Simulink/Carsim joint simulation of the wheeled mobile robot was realized.The double shift line test results showed that the lateral stability of the wheeled mobile robot under joint simulation was higher than that of the traditional mobile robot.
2019, 34(5)
:96-102.
doi: 10.3969/j.issn.2096-1553.2019.05.013
Abstract:
In order to reduce the commutation impact,flow hysteresis and valve core sticking in the excavator working process,based on the working principle of load-sensitive proportional multiplexing valve, the speed of main valve and pilot valve is matched by adding a damping hole between the proportional pressure relief valve and the main valve. The mathematical model of proportional pressure relief valve is deduced, and the AMESim model of load-sensitive proportional multiplexing valve is established to verify its dynamic characteristics. The simulation results show that with the increase of viscous friction force, the stability of the system will increase, and the response time of the system will also increase, so viscous friction force can not be set too large,with 5000 N·(m/s) as the suitable; adding a damping hole between the proportional pressure relief valve and the main valve can improve the stability of the multi-way valve; with the increase of spring stiffness, the oscillation amplitude of main valve displacement increases, which causes the stability deterioration, so the design of spring stiffness should not be too large with 30 000 N/m as the suitable;the quality of the main valve spool has little effect on the system response.In design only its stiffness and corrosion resistance should be taken into consideration.
In order to reduce the commutation impact,flow hysteresis and valve core sticking in the excavator working process,based on the working principle of load-sensitive proportional multiplexing valve, the speed of main valve and pilot valve is matched by adding a damping hole between the proportional pressure relief valve and the main valve. The mathematical model of proportional pressure relief valve is deduced, and the AMESim model of load-sensitive proportional multiplexing valve is established to verify its dynamic characteristics. The simulation results show that with the increase of viscous friction force, the stability of the system will increase, and the response time of the system will also increase, so viscous friction force can not be set too large,with 5000 N·(m/s) as the suitable; adding a damping hole between the proportional pressure relief valve and the main valve can improve the stability of the multi-way valve; with the increase of spring stiffness, the oscillation amplitude of main valve displacement increases, which causes the stability deterioration, so the design of spring stiffness should not be too large with 30 000 N/m as the suitable;the quality of the main valve spool has little effect on the system response.In design only its stiffness and corrosion resistance should be taken into consideration.
2019, 34(5)
:103-108.
doi: 10.3969/j.issn.2096-1553.2019.05.014
Abstract:
The one effect evaporator in the multi effect evaporator was simulated using the FLUENT. According to the basic structure of the designed evaporator and the actual situation of the project, the physical model was simplified reasonably and the full flow channel double flow model of the evaporator was established. Through the fluid structure coupling analysis, the flow rate and pressure characteristics of the flow field of the evaporator were mastered. The simulation results showed that the internal flow pressure loss of heat exchanger was large, the flow uniformity was unreasonable, and the liquid resistance performance was obvious; the internal liquid flow uniformity and consistency were relatively poor, and the external air flow uniformity and consistency were good. The error between experimental verification and simulation results was within the allowable range, which showed that the simulation results were reliable. In order to improve the problem of excessive pressure loss and uneven flow in the evaporator, it is necessary to optimize its internal structure reasonably.
The one effect evaporator in the multi effect evaporator was simulated using the FLUENT. According to the basic structure of the designed evaporator and the actual situation of the project, the physical model was simplified reasonably and the full flow channel double flow model of the evaporator was established. Through the fluid structure coupling analysis, the flow rate and pressure characteristics of the flow field of the evaporator were mastered. The simulation results showed that the internal flow pressure loss of heat exchanger was large, the flow uniformity was unreasonable, and the liquid resistance performance was obvious; the internal liquid flow uniformity and consistency were relatively poor, and the external air flow uniformity and consistency were good. The error between experimental verification and simulation results was within the allowable range, which showed that the simulation results were reliable. In order to improve the problem of excessive pressure loss and uneven flow in the evaporator, it is necessary to optimize its internal structure reasonably.
Journal Information
Founded in 1986， bimonthly
Administered by：The Education Department Henan Province
Sponsored by：Zhengzhou University of Light Industry
Editor-in-chief：Wei Shizhong
Executive Editor-in-Chief：Zou Lin
Subeditor：Qu Shuanghong
Edited & published by：Editorial Department of Journal of Light Industry
CN 41-1437/TS
ISSN 2096-1553
Address：136 Science Avenue, Zhengzhou City, Henan Province, China
Postal Code：450001
Tel：(086)0371-86608635
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