最新刊期
卷 41 ， 期 4 ， 2020
- 摘要：During the operation of the air conditioner, when the outlet of the air conditioner condenser is blocked, if there is a leak point in the front section of the compressor and the air is taken in, the mixture of R32 refrigerant and air will burn or explode when the temperature and pressure reach certain conditions. In this paper, in the view of the safe operation of the R32 compressor, when the air conditioner is running, close the condenser outlet. The combination of experimental and simulation studies is used to investigate the risk of flammability in the R32 compressor when the air intrusion is 10%, 40%, or 60% of the compressor intake. The analysis results show that the air intrusion amount is 10% of the compressor suction, the impact on the compressor discharge pressure and exhaust temperature is small, and the flammability risk is low; When the amount of air intrusion is greater than 10% of the intake of the compressor, as the amount of air intrusion increases, the discharge pressure increases and when the air intrusion amount is 60%, the exhaust pressure exceeds 17% of the rated outlet pressure of the compressor. At this time, the temperature of the lubricating oil in the oil pool exceeds 100 ℃, generating The carbon deposit increases the risk of combustion and explosion; the coil winding temperature of the motor exceeds the temperature limit of the insulating material by 120 ℃, accelerating the aging of the insulating material to cause a short circuit to generate sparks, and increasing the flammability risk in the R32 compressor.关键词：R32;air conditioning compressor;air intrusion;exhaust pressure;combustible risk1682|1764|0发布时间：2024-07-18
- 摘要：Solar photovoltaic and ice storage air-conditioning are both green air-conditioning technologies that can relieve the power supply pressure on power grids and reduce the operation cost of air-conditioning system. This study combines these two technologies and proposes a photovoltaic ice storage air-conditioning (PSAC) system that has a charging-and-chiller-cooling mode. A nonlinear optimization model for the PSAC system operation is developed and solved by the dynamic programming method to achieve global optimal results. According to the photovoltaic generation and building cooling load predictions, several case studies have been conducted for PSAC predictive control with different building cooling loads. The results show that when the photovoltaic generation prediction is considered, the cooling load for forming ice at night is shifted to the daytime, resulting in a reduction of the system operation cost and improvements in the solar fraction, self-consumption ratio, and average COP. When the selling price of photovoltaic electricity decreases, the PSAC is able to utilize the photovoltaic electricity in a better manner and the system operation cost can be reduced further under the predictive control.关键词：solar photovoltaic;ice storage;dynamic programming;predictive control;operation cost1751|1764|3发布时间：2024-07-18
- 摘要：This study proposes a "one tower with three functions" solution for a dehumidification type frost-free air-source heat pump (ASHP) system, which can not only solve the frost problem of traditional ASHP systems in winter, but also improve the performance of the units in summer. The effects of air temperature, humidity, mass flow rate, solution temperature, and mass concentration were studied under dehumidification conditions. Additionally, solution mass concentration, the effect of solution temperature under regenerative conditions on the air exergy of the inlet and outlet, dehumidification/regenerative exergy, system input, output exergy, and exergy efficiency were studied by constructing the test bench. The results show that under dehumidification, there is an increase in the dehumidification exergy with an increase in the air temperature, air mass flow rate, and solution mass flow rate, and a decrease in the air humidity, solution temperature, and solution mass concentration. Additionally, there is an increase in the system exergy efficiency with an increase in the air temperature, humidity, air mass flow rate, mass flow rate and mass concentration of the solution, and a decrease in the solution temperature, air humidity and mass concentration of the solution. These have an insignificant effect on the exergy efficiency when the efficiency is up to 0.201. Under regenerative conditions, there is an increase in the regeneration exergy with an increase in the solution mass concentration and solution temperature. There is also an increase in the system exergy efficiency with an increase in the solution mass concentration, and a decrease in the solution temperature. The solution temperature has an insignificant effect on the exergy efficiency, when the efficiency is up to 0.1088. The efficiency of this system is higher than that of a conventional ASHP system under experimental conditions.关键词：heat pump;non-frost;dehumidification;regeneration;exergy analysis1678|2231|0发布时间：2024-07-18
- 摘要：In order to quickly evaluate the attenuation rate of the heat transfer capacity of heat exchangers used in air-conditioners after long-term operation, a method for predicting this attenuation rate is established by measuring the heat transfer capacity of a heat exchanger before and after dust-accelerating tests. In this test method, the dust concentration on the windward side of the heat exchanger is accurately adjusted by using the negative feedback mode, which can maintain the stability of the dust concentration on the windward side of the heat exchanger during the dust-accelerating testing period. The placement of the heat exchanger sample can be fixed during the dust-accelerating and heat transfer capacity tests by combining the dust box and air duct. The reliability and repeatability of the test method are verified under the condition of inlet air temperature of 45 °C, air flow rate 1.5 m/s, inlet water temperature 21 °C, and water flow rate 0.5 m/s. The results show that the dust concentration on the windward side of the heat exchanger can be maintained at the target value of 120 mg/m3 and the fluctuation range is within ±20%. The heat transfer capacity attenuation rates of four types of heat exchanger samples with different structures are measured several times, and the relative deviations of the attenuation rates are within ±10%, implying that our test method has good repeatability.关键词：fin-and-tube heat exchanger;heat transfer capacity attenuation rate;measurement method;dust-accelerating test1753|2043|0发布时间：2024-07-18
- 摘要：A heating cycle mode of heat pump drive multi-connected heat pipe is proposed. The feature of this method is that the air source heat pump is used to drive tandem heat pipe radiator for heating directly. In order to verify the feasibility of this heating method, an experimental platform was built based on a 2.5 kW compressor and 9 heat pipe radiators, and the device was tested under different working conditions. The test results show that the new heating device has a faster starting speed, when the outdoor temperature is -10 °C and the system runs for 36 minutes, the surface temperature of the heat pipe radiator can reach 45 °C. Heat is evenly distributed at the end of the heat pipe radiator. Except for 1# and 9# radiators, which have over-cooling and over-heating, the temperature difference between the other radiators is approximately 1 °C. At the same time, the system has a small heat transfer temperature difference and can operate normally under defrost conditions.关键词：air-source heat pump;heat pipe;multiple connection;system performance1556|1875|1发布时间：2024-07-18
- 摘要：The energy efficiency of conventional CO2 systems used for heating is low. Therefore, cascade and subcooling systems can be adopted to improve the performance of CO2 systems. In this study, the thermodynamic models of a baseline CO2 system (BASE), R410A vapor injection system, cascade system, indirect dedicated mechanical subcooling CO2 system (IDMS), and direct dedicated mechanical subcooling CO2 system (DDMS) are established. The performances of the system with different heating terminals are optimized and analyzed. The results show that when the supply and return water temperatures are 65 ℃ and 40 ℃, respectively (the heating terminal is the traditional designed radiator) and the ambient temperature is -20–20 ℃, the COP of the DDMS system is improved by 3.8–20.9% compared with that of the baseline CO2 system. The CO2 subsystem plays a dominant role in the DDMS system. In contrast, for the IDMS system, the subcooling subsystem is more important for most cases concerning hot water production. A significant increase in system efficiency can be achieved by adding a relatively small vapor compression refrigeration cycle for the DDMS system. In the CO2 heat pump system, when the ambient temperature is above -15 ℃, the exergy efficiency of the DDMS system is higher than that of other systems. Compared to the baseline CO2 system, the exergy efficiency is improved by 19.3%–28.2%. For the cases with ambient temperature below -15 ℃, the CO2/R1234yf cascade system shows the highest exergy efficiency.关键词：air-source heat pump (ASHP);CO2;cascade;indirect dedicated mechanical subcooling system;direct dedicated mechanical subcooling system;vapor injection system1606|2620|7发布时间：2024-07-18
- 摘要：The heating performance of a three-heat exchanger heat pump air-conditioning system of an electric vehicle in winter is investigated experimentally. The effects of indoor, outdoor ambient temperatures and relative humidity on the outlet temperature of the heating ventilation and air conditioning (HVAC) module, coefficient of performance (COP) and other performance parameters are investigated at different compressor speeds. The results show that higher compressor speeds can improve the outlet air temperature and heating capacity of the HVAC module, but the COP of the system decreases. When the compressor speed is maintained constant, for every 5 ℃ increase in the ambient temperature, the heating capacity increases by 9%–22%, the outlet temperature increases by 6–9 ℃, and COP increases by 7%–11%. When the outdoor relative humidity increases from 40% to 80%, the heating capacity increases by 15%–20%, outlet temperature increases by 2–3 ℃, and the COP increases by 6%–9%.关键词：electric vehicle air-conditionding;heat pump;HVAC module;heating performance;coefficient of performance1583|2195|5发布时间：2024-07-18
- 摘要：A direct refrigerant battery cooling system is proposed in this study in order to derive an approach to face the rising energy density and solve the thermal dissipation of batteries during the fast-charge or over-charge process. A novel honeycomb shaped single-sided roll-bond aluminum sheet was designed and introduced under a power battery to serve as a cooling plate. Refrigerant is boiled in the novel channel and the latent heat of vaporization is utilized to satisfy the thermal management demand of the power battery in the direct refrigerant battery cooling system. A silicon rubber heating board was used to simulate the thermal demand of the power battery module according to the state of charge data of the power battery. An experimental bench was built to test the performance of the system under the environmental temperature of the UDDS condition. The experimental results show that the system can respond to the thermal management requirements quickly in approximately 150 seconds under the maximum heat generation, i.e., 6 kW, which shows fast response characteristics. The average temperature of the surface of the cooling plates can be controlled between the appropriate temperature range of 15 to 20 ℃ and meet the temperature uniformity requirement of 4 ℃ under the given conditions. At the same time, the COP of the system is above 2.8 under the given conditions.关键词：battery thermal management;direct cooling system;cooling plate design;experimental research2030|2586|5发布时间：2024-07-18
- 摘要：In this study, a vapor chamber with an internal flow channel and a phase change working fluid R1233zd is studied. The vapor chamber is placed between the cold source and heat source. The temperature field of the vapor chamber is analyzed theoretically and by simulation. Furthermore, the temperature distribution is obtained by experiments. The experimental results show that the temperature distribution of the vapor chamber is consistent with that of the cold source. The temperature distribution is affected by the power of the heat source and the temperature of the cold source. When the power of the heat source rises from 345 W to 690 W and the temperature of the cold source remains at 0 ℃ , the average temperature of the vapor chamber increases from 13.20 ℃ to 25.84 ℃ , and the temperature difference increases from 11.10 ℃ to 25.70 ℃ . When the temperature of the cold source reduces from 0 ℃ to -5 ℃ and the power of the heat source remains at 690 W, the average temperature of the vapor chamber decreases from 25.84 ℃ to 18.15 ℃ , and the temperature difference decreases from 25.70 ℃ to 16.60 ℃ . Under different working conditions, the thermal resistance of the vapor chamber is approximately 0.03 K/W, which shows that the vapor chamber has good thermal conductivity.关键词：vapor chamber;experimental study;temperature field;phase change working fluid1576|2080|3发布时间：2024-07-18
- 摘要：Chillers usually account for a major part of the overall energy consumption in commercial buildings. To improve the energy efficiency of chillers, we present an optimal chiller loading control strategy based on the best-performance line of the chiller. The best-performance line is created from historic operation data by using the moving window and data proliferation methods. The strategy is validated using an airport air-conditioning system in south China. The strategy is compared with sequencing control strategy. The results show that the proposed strategy shows a better performance with respect to energy saving. On typical days, the operating condition of the chillers can be optimized to save energy up to 8.2%.关键词：chiller;sequence control;chiller load optimization;the best performance line1717|1822|1发布时间：2024-07-18
- 摘要：Normal factors such as complex control strategies, flexible meteorological parameters, and operation conditions or abnormal factors such as refrigerant charge faults in variable refrigerant flow (VRF) systems can lead to complex and varying fluctuations in the energy consumption. It is difficult to directly diagnose whether normal or abnormal factors cause such fluctuations based on the energy consumption. In this study, an effective energy assessment and diagnosis method is proposed, which combines the support vector regression (SVR) algorithm with the one-class support vector machine (OCSVM) algorithm to diagnose the energy performance of a VRF system. An energy assessment and diagnosis model is constructed based on the normal data set, and is verified by the abnormal energy data set. The results show that the energy assessment and diagnosis model based on SVR-OCSVM has a high accuracy of up to 70%.关键词：variable refrigerant flow system;energy assessment and diagnosis;support vector regression algorithm;one-class support vector machine1569|1841|1发布时间：2024-07-18
- 摘要：The droplet evaporation process of Al2O3 nanofluid droplets with particle size 50 nm and mass fraction 0.1% were investigated experimentally. The actual evaporation behaviors of four types of heating temperatures (30, 47, 64, and 81 ℃) on the glass-slide substrate were studied to investigate the temperature field distribution of the gas liquid interface. The variation in the contact angle and contact line radius, and the temperature distribution of nanofluid droplets during evaporation were obtained, and the evaporation junctions were photographed with a microscope. As a result, the sedimentary patterns left by the evaporation of the bottom plate were observed. The results show that the difference in evaporation temperature does not have a significant effect on the evaporation mode. However, as the heating temperature of the bottom plate increases, the evaporation time is considerably shortened (the longest evaporation time is 10 times of the shortest). The initial Marangoni number increases gradually with the bottom plate temperature, but the Marangoni flow is inhibited with continuous evaporation.关键词：nanofluid;droplet evaporation;evaporation mode;temperature distribution1495|1796|1发布时间：2024-07-18
- 摘要：In order to get better performance of power-assisted heat pipe systems, the performance of three types of compressors was experimentally studied. The results show that: 1) a compressor with gas pump function has the function of a low compression ratio operation, which can switch between different modes, according to different outdoor temperatures and indoor loads, and simplify the system configuration. Additionally, it has good energy-saving benefits. The coefficient of performance (COP) of the inverter rotor compressor can exceed 20, the COP of the inverter scroll compressor is close to 20, which shows that they can be a good alternative to the liquid pump; 2) for the air-conditioning systems in small data rooms, comprehensive utilization of the gas heat pipe and compression refrigeration technology broaden the utilization time of free cooling. The annual energy efficiency ratio (AEER) is considerably higher than that of the conventional computer room air conditioning. The application of regional energy saving methods such as air cooling, water cooling, and evaporative cooling provide a new strategy for energy saving and emission reduction of modern data centers; 3) for air-conditioning in large data centers, the COP of magnetic bearing compressors exceeds 20, and results in higher energy-saving benefits. However, there is still a certain gap as compared with the liquid pump. At the same time, centrifugal compressors used as gas pumps have a shortage of circulation, which requires the liquid pump to compensate the pressure head.关键词：data center cooling;loop heat pipe;COP;energy saving1777|2090|1发布时间：2024-07-18
- 摘要：Since traditional impact freezers have low freezing efficiency and high food weight loss, upper and lower impact freezers have gradually been recognized as new types with high efficiency by the food quick-freezing industry. In order to further optimize the freezing effect of the upper and lower impact freezers, a solid impact freezer with a hydrostatic cavity size of 4 m × 1.5 m × 2 m was taken as the baseline. The internal flow fields of five different dimensions of hydrostatic cavities including 4 m × 1.5 m ×1.5 m, 4 m × 2 m × 1.5 m, 4 m × 2 m × 2 m, 4 m × 2.5 m × 1.5 m, and 4 m × 2 m × 2 m were simulated by computational fluid dynamics (CFD) with the inlet pressure of 190 Pa and inlet flow rate of 4.4 m3/s. The internal heat transfer characteristics of the hydrostatic cavity were also analyzed comprehensively in terms of the nozzle outlet wind velocity of the impact freezer, vector distribution of the air flow on the surface of the steel belt, surface heat transfer intensity and heat transfer uniformity of the steel belt. The results showed that under the condition of the same inlet flow and constant pressure, only the outlet wind velocity of the cavity of dimensions 4 m × 1.5 m × 1.5 m differed slightly from that of the original size, and the wind velocities of the other sizes were slightly lower, but the range of change was not apparent. However, the heat transfer intensity and uniformity of this size were far less than those for the cavities with dimensions of 4 m × 2.5 m × 1.5 m and 4 m × 2.5 m × 2 m. In addition, although the heat transfer intensity of the hydrostatic cavity of dimensions 4 m × 2 m × 2 m was approximately 4.85% higher than that of the cavity of dimensions 4 m × 1.5 m × 2 m, its uniformity was poor and insufficient for it to be the optimal design. The heat transfer intensity of the cavities of dimensions 4 m × 2.5 m × 1.5 m and 4 m × 2.5 m × 2 m reached 177.76 and 177.39, which were approximately 6.81% and 6.59% higher than the surface heat transfer intensity of the steel belt under the original size. Additionally, the uniformity was the best. Combined with the above factors, the cavities of dimensions 4 m × 2.5 m × 1.5 m and 4 m × 2.5 m × 2 m were the optimal designs among the five sizes in terms of the outlet wind velocity, heat transfer intensity, and uniformity.关键词：frozen food;impingement quick-freezing technology;hydrostatic cavity;computational fluid dynamics1653|1740|1发布时间：2024-07-18
- 摘要：A new evaporative condenser with an annular elliptic finned tube heat exchanger (AEFTHE) was designed and theoretically analyzed in this study. The cooling water flowed inside the round inner tube, while the spray water and cooling air passed outside the elliptical outer tube. The refrigerant flowing between the inner and outer tube was simultaneously condensed by the cooling water, spray water and cooling air. The theoretical heat transfer analysis of the annular elliptic finned tube evaporative condenser was based on the in-situ measurement about the round finned tube evaporative condenser (RFTEC) in Futong Metro Station of Line 14 in Beijing. The simulation results were compared with the actual operating data of the traditional RFTEC. The result showed that the pressure drop in the AEFTHE was 11.18% to 14.65% lower than that of the round finned tube heat exchanger (RFTHE) when the inlet air temperature was 27 ℃ and air velocity was in the range 3–4 m/s. The outlet refrigerant temperature of the AEFTHE was 2.66 ℃ to 10.21 ℃ lower than the simulation value of the RFTHE when the temperature of spray water was in the range 27.5–33.5 ℃. The outlet refrigerant temperature of the AEFTHE was 1.9 ℃ to 4.3 ℃ lower than the measured value of the RFTHE under the same conditions when the inlet refrigerant temperature was greater than 44 ℃. The total heat transfer coefficient of the AEFTHE was 47.42% higher than that of the RFTHE under the same conditions.关键词：evaporative condenser;finned tube heat exchanger;annular elliptic tube;theoretical analysis;in-situ measurement1676|2112|2发布时间：2024-07-18
- 摘要：Nowadays, miniaturization is a feasible course of action in the development of brazed plate heat exchangers. In this study, a mini-channel brazed plate condenser with an equivalent diameter of 1.5 mm was studied. The heat transfer and pressure drop characteristics were analyzed. First, a one-dimensional steady-state distribution parameter model was established by the finite volume method to compute the condensation performance of R134a and R1234yf. Second, an experiment was conducted to confirm the reliability of the simulation model. According to the experimental results, the simulation model has high precision. The average error of the heat transfer performance predicted by the model is 4%, and the average error of pressure drop predicted by the model is 16%. Finally, the simulation model was used to calculate the condensation heat transfer characteristics of R134a and R1234yf in the mini-channel brazed plate heat exchanger. The simulation results show that the heat transfer performance and pressure drop of R1234yf are 9% and 8% lower than that of R134a under the same condensation conditions.关键词：plate condenser;mini-channel;heat transfer coefficient;press drop1561|1772|1发布时间：2024-07-18
- 摘要：An experimental study is conducted to analyze the thermal environment and thermal comfort under the refrigeration conditions of the vehicle cabin. The experimental conditions are as follows. The air conditioning modes are refrigeration with indoor set temperature 26 ℃, automatic mode with internal circulation. The driving states are idle condition and road test. The experimental results show that the vehicle cabin temperature is affected by the spatial position and driving state. The uniformity of the temperature in the road test is higher than that in the idle condition. The humidity distribution of the vehicle cabin is also affected by the spatial position and driving state. The relative humidity difference between the front and rear on the road test is less than that of the idle condition. The temperature of the seat is affected by solar radiation and the occupant. The seat temperature is slightly higher than that of indoor air in the warming period and the cooling rate of the seat is much less than that of indoor air in the cooling period. The predicted mean vote (PMV) and the equivalent temperature models are basically consistent with the change of actual thermal comfort under the idle condition and road test. The prediction accuracy of the two models in the idle condition is higher than that on the corresponding road test. The overall prediction accuracy of the equivalent temperature model is higher than that of the PMV model.关键词：vehicle cabin;thermal environment;thermal comfort;PMV model;equivalent temperature model1536|1954|1发布时间：2024-07-18
- 摘要：In this study, a scale model experiment platform was built for soil heat storage and release characteristics of a tunnel surrounding rocks, and a physical model (1:1) was built and simulated using CHAMPS-BES software. Comparing the simulation results with the experimental results of the temperature field, heat storage, and heat release of the tunnel surrounding the rock mass, it is found that for a higher air temperature of the tunnel, the annual net heat storage of the soil is greater, and the heat storage capacity of the soil gradually decreases with an increase in the soil temperature. The heat storage capacity of the soil is attenuated within 15 years and annual net heat storage gradually decreases from 24% to 4%. The difference in annual net heat storage simulated under different shield boundary conditions is less than 5%, hence the influence of the interval shield thickness and shield thermal conductivity on the soil heat storage and discharge can be neglected. In the initial condition, for a lower temperature, the heat storage capacity of the soil is greater. The stored heat in the soil at an initial temperature of 9 ℃ is approximately 5 times that at an initial temperature of 22 ℃.关键词：subway tunnel;surrounding rock;heat storage and release;air temperature;soil parameters1508|1726|0发布时间：2024-07-18
- 摘要：At the rocket launching stage, it is very important to supply sufficient and vapor-free liquid propellant to maintain the functioning of the main engine. Considering the working characteristics and design requirements of the outflow device of the cryogenic propellant tank, a computational fluid dynamics model is developed to simulate the outflow features and to compare and analyze the residual liquid quantities during the appearance of gases in the pipe in different conditions. The major factors include whether the outlet adopts a conical angle transition, whether the baffle is arranged above the outlet, whether the outlet is equipped with a filter, and the influence of the geometric structure of the baffle. Results show that the quantity of unusable liquid propellants can be significantly reduced by using cone transition, and the optimum cone angle is approximately 30°. The optimal arrangement of the baffle including its height and length is beneficial for adequately supplying the pure liquid cryogenic propellants. The spherical shell baffle can further reduce the quantity of unusable propellants by approximately 0.25%. The outlet filter can intercept solid impurities and large bubbles into the conveyor pipe. Compared with liquid oxygen, the surface tension of liquid hydrogen is inferior with respect to maintaining the stability of the gas-liquid interface, and the optimal design of the outlet structure has more rigorous requirements.关键词：rocket launch;cryogenic propellant;outflow device;surface collapse;CFD simulation1618|1849|2发布时间：2024-07-18
- 摘要：The low-field nuclear magnetic resonance technique was used to analyze the moisture content inside broad bean seeds and the deformation mechanism in each phase. The characteristics of seed dehydration and deformation under different low temperature environments and different vacuum conditions were studied. The results show that the z (thickness) direction shrinkage varies the most and is susceptible to the dehydration environment. The combined water content does not change significantly during the vacuum dehydration process. The semi-bound water content shows an increase-decrease trend and the free water content continues to decrease to zero. The free flow of free water between cells can enhance respiratory metabolism and nutrient consumption, and hence should be discharged as soon as possible. The transformation and escape of semi-bound water plays a key role in maintaining the morphology of broad bean seeds. The escape of combined water is directly related to cell rupture that is vital to the survival of the seed. The cell membrane rupture in the broad bean seed has three stages, and the water transport interacts with it. To maintain seed activity, the dehydration should be completed before the third stage.关键词：moisture phase;nuclear magnetic resonance;vacuum dehydration;shrinkage deformation1410|1799|1发布时间：2024-07-18
- 摘要：In this paper, dehydration characteristics and microstructure variation of broad bean seeds under low temperature vacuum environment were examined. The dehydration experiments were performed at 0, 4, and 8 ℃under a vacuum of 97 kPa. The moisture ratio and shrinkage of the samples were determined every 30 min. Scanning electron microscopy (SEM) was used to obtain the images of broad bean seed cells. The structural parameter distribution curves of broad bean cells at different moisture ratios were obtained by using the image processing technique. The effects of the vacuum environment on the dehydration characteristics and cell structural parameters of broad bean seeds were analyzed. The results showed that during dehydration, the moisture ratio exponentially decreased, and the Page model exhibited the best fitting effect. Thus, the shrinkage gradually increased first. Subsequently, the variation tended to be gentle. Although the main distribution intervals of size parameters, such as cell area, perimeter, and diameter fluctuated within a small range, the overall trend was decreased. Thus, the data distribution was gradually concentrated. Furthermore, the change in cell shape parameters was low, the roundness and elongation ranged within 10%, and the compactness was almost constant.关键词：cell deformation;dehydration characteristics;microstructure;seed materials1249|1680|1发布时间：2024-07-18
- 摘要：Drastic changes in the surrounding environment have a certain effect on the inner regions of cells. In this study, the morphology of microfilaments in the cytoskeleton during dehydration is studied by Coomassie brilliant blue staining and digital image processing. By analyzing the gray-scale kurtosis of the processed image, it is observed that as the dehydration process progresses, the gray-scale image shows a decrease in dispersion, the skeleton morphology is looser, and a series of morphological changes are accompanied by depolymerization. Through quantitative calculation of the characteristic parameters of the image, it is inferred that the final relative rate of change of the skeleton under a continuous vacuum environment is 32.7%, and that under a continuous low temperature environment is 59%. Finally, a study on the degree of cell deformation shows that the dehydration process has a more significant effect on the cytoskeleton.关键词：cell biology;skeleton;morphology;vacuum degree;cooling rate;microstructure1239|1764|1发布时间：2024-07-18
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