检索结果-南通市图书馆

Experimental Study on the Rehydration of Lyophilized Human Platelets

2008国际低温与制冷大会

作者： Zhang S Z Wang H Y chen g m institute of refrigeration and cryogenics Zhejiang University Hangzhou 310027 P.R.China

＜正＞Cells of ice nucleation active（INA） bacteria,Pseudomonas syringae,was cultured at 26℃with nutrient agar culture medium and harvested at early stationary phase（20h） for maximum ice nucleation *** cells were incorporated into water or solid model food to investigate their effects on degree of supercooling and characteristic freezing *** freezing temperatures were used,-15℃and -30℃.It was found that the degrees of supercooling of model foods with INA were reduced by 3℃to 4℃at all freezing *** characteristic freezing time was *** results imply that the ice nucleation bacteria may be used to modify the freezing process to save energy and the effects will be more obvious for higher freezing temperature and smaller sample size.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Experimental Study on the Rehydration of Lyophilized Human P...

DISPLACEmENT CONTROL AND KINETIC ANALYSIS OF A NOVEL VARIABLE DISPLACEmENT COmPRESSOR FOR AUTOmOTIVE AIR CONDITIONER

2008国际低温与制冷大会

作者： Fan J L~* Zhu F m~(**) Zhang S Z~(**) XU X g~(**) chen g m~* * institute of refrigeration and cryogenics Zhejiang University Hangzhou 310027 P.R.China ** Blood Center of Zhejiang Province Hangzhou 310006 P.R.China

＜正＞Freeze-drying is an ideal alternative for long-term preservation of platelets in blood *** this paper,prehydration time,rehydration temperature and rehydration solution were considered for studying the rehydration of freeze-dried human *** prehydration time,0h,1.5h and 3.5h and two rehydration solution,platelet-poor plasma and phosphate-buffered saline（PBS） were *** is found that prehydration is beneficial and 1.5h prehydration time is better than 3.5h;platelet-poor plasma is better than *** results will be helpful for further study on freeze-drying of mammalian cells.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Journal of mechanical Engineering 2001年第4期14卷 325-329页

作者： Yuan Xiaomei,chen Zhijiu (institute of refrigeration and cryogenics Engineering, Shanghai Jiaotong University) 上海交通大学上海

A novel variable displacement compressor (VDC) for automotive air conditioner (AAC) is introduced, which inherits the advantages of common wobble plate type VDC. It has fewer parts and makes less noise, and instead of pneumatic valve the displacement is controlled by electronic control valve. In order to know the control mechanism well and get a good control effect, a mathematical model for the variable displacement mechanism is developed according to the geometrical and kinematical information of the compressor. Using the model, the effect of relevant parameters on variable displace control is estimated. It is helpful to make the optimum decision in the flow control of AAC. As the novel displacement control device, the structure and control rule of electronic control valve is introduced. It can get better effect than the conventional pneumatic valves. And by using this new electronic control device, the optimum systemic control of AAC is available.

关键词： Displacement control Kinetic analysis Automotive air conditioner (AAC) Variable displacement compressor(VDC)

Experimental adsorption equilibrium study and comparison of zeolite with water and ethanol for cooling systems

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 216-220页

作者： mAIgA Abdoulaye Siddeye, chen guang-ming, WANg Qin (institute of refrigeration and cryogenics, Zhejiang University, Hangzhou 310027, China) institute of refrigeration and cryogenics Zhejiang University Hangzhou 310027 China Ph.D student at Zhejing University from mali

Two adsorption refrigeration working pairs of zeolite with water and ethanol were studied and the parameters of Dubinin-Astakhov model were regressed using the experimental data of equilibrium. The coefficient of heterogeneity varied from 1.305 to 1.52 for the zeolite-water pair and from 1.73 to 2.128 for zeolite-ethanol pair. The maximum adsorption capacity varied from 0.315 to 0.34 for zeolite-water and 0.23 to 0.28 for zeolite-ethanol, respectively. The results showed that the zeolite-water pair is suitable for solar energy cooling not only because of the high latent heat of vaporization of water but also because of the better equilibrium performance. On the other hand, zeolite-ethanol gives a high adsorption capacity at high regeneration tem-perature, which means it can be used in heat engine systems like buses and cars.

关键词： Adsorption refrigeration Zeolite Ethanol Water Equilibrium

Development of an automatic calibration device for high-accuracy low temperature thermometers

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2010年第9期53卷 2404-2407页

作者： chen guangming,gAO Xu,ZHANg ShaoZhi,chen Qi,TANg Liming & LAN YuQi institute of refrigeration and cryogenics,Zhejiang University,Hangzhou 310027,China institute of refrigeration and cryogenics Zhejiang University Hangzhou China

Based on the analysis and investigation of calibration systems for high-accuracy low temperature thermometers,a new facility for automatic calibration of high-accuracy low temperature thermometers was *** calibration for multiple points can be made automatically with this *** to the thermophysical characteristics of the constant-temperature block in this device,segmented Fuzzy-PID (proportional-integral-differential) algorithm was *** experimental results showed that the temperature fluctuation was smaller than ±0.005 K in 30 ***,this new device can fully meet the calibration requirement of high-precision low temperature thermometers.

关键词： calibration low temperature thermometer control algorithm

RESEARCH ON mEASURINg mETHOD OF THE THERmALCONDUCTIVITY FOR HIgHLY POROUS mATERIALS

在线全文

学校读者我要写书评

暂无评论

Acta metallurgica Sinica(English Letters) 1997年第3期10卷 213-218页

作者： J Y Wu Z.m. Tang W Shi andR.Z. Wang (institute of refrigeration and cryogenics Engineering, Shanghai Jiao Tong University, Shanghai 200030,China) Shanghai Jiaotong Univ Shanghai China

A transient method with rectangular pulse heating has been developed to measure the thermal conductivity of highly porous materials such as activated carbon, zeolite and silica gel. By this method the thermal conductivity can be measured quickly and accu-rately. In this paper, a set of automatically controlled testing equiptnent is *** measuring method is analysed. The thermal conductivities of some samples, such as activated carbon and zeolite, are measured by the equipment. A group of useful data has been obtained.

关键词： thermal conductivity porous material thermophysical property

gas hydrate fast nucleation from melting ice and quiescent growth along vertical heat transfer tube

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2005年第1期48卷 75-82页

作者： XIE Yingming1,2, gUO Kaihua2, LIANg Deqing2, FAN Shuanshi2, gU Jianming1 & chen Jinggui2 1. institute of refrigeration and cryogenics, Shanghai Jiaotong University, Shanghai 200030, China 2. guangzhou institute of Energy Conversion, The Chinese Academy of Sciences, guangzhou 510640, China Inst. of refrigeration Shanghai Jiaotong Univ. Shanghai 200030 China guangzhou Inst. of Energy Conversion Chinese Acad. of Sci. Guangzhou 510640 China

During the observation of HCFC141b gas hydrate growth processes outside a ver- tical heat transfer tube, two exciting phenomena were found: fast nucleation of gas hydrate from melting ice, and the spontaneous permeation of water into the guest phases along the surface of heat transfer tube to form gas hydrate continuously. These two phenomena were explained with Zhou & Sloan’s hypothesis and the theory of surface free energy respectively, and a novel method of gas hydrate formation was presented——gas hydrate fast nucleation from melting ice and quiescent growth along heat transfer tube. There is no mechanic stirring in this method, the formed gas hydrates are compact, the ratio of unreacted interstitial water is little, which overcome the drawback of high energy cost and high ratio of unreacted interstitial water among the formed gas hydrates in the system with mechanic stirring. This finding will benefit the gas hydrate ap- plication technologies such as natural gas storage technology or cool storage technology with gas hydrate.

关键词： gas hydrate, natural gas storage, cool storage, fast nucleation from melting ice, permeation, surface free energy.

A comprehensive review of the modeling of transport phenomenon in the flow channels of polymer electrolyte membrane fuel cells

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2024年第8期18卷 123-161页

作者： Niyi Olukayode Shenrong Ye mingruo Hu Yanjun Dai Rui chen Sheng Sui institute of Fuel Cell Shanghai Jiao Tong UniversityShanghai 200240China institute of refrigeration and cryogenics Shanghai Jiao Tong UniversityShanghai 200240China Low Carbon Engineering Loughborough UniversityLoughborough Leicestershire LE113TUUK

Reactant gas and liquid water transport phenomena in the flow channels are complex and critical to the performance and durability of polymer electrolyte membrane fuel *** polymer membrane needs water at an optimum level for proton *** management involves the prevention of dehydration,waterlogging,and the cell’s subsequent performance decline and *** process requires the study and understanding of internal two-phase *** experimental visualization techniques are used to study two-phase flows in polymer electrolyte membrane fuel ***,the experiments have limitations in in situ measurements;they are also expensive and time *** contrast,numerical modeling is cheaper and faster,providing insights into the complex multiscale processes occurring across the components of the polymer electrolyte membrane fuel *** paper introduces the recent design of flow *** reviews the numerical modeling techniques adopted for the transport phenomena therein:the two-fluid,multiphase mixture,volume of fluid,lattice Boltzmann,and pressure drop ***,this work describes,compares,and analyses the models’approaches and reviews the representative results of some selected ***,the paper summarizes the modeling perspectives,emphasizing future directions with some recommendations.

关键词： two-phase flows numerical model flow channel polymer electrolyte membrane fuel cells water management

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

一种具有强化自然通风效果的太阳能空调房

太阳能学报 2003年第3期24卷 283-289页

作者：代彦军王如竹上海交通大学制冷与低温工程研究所上海200030

提出一种依靠吸附制冷原理制冷 ,结合太阳能通风筒强化自然通风的太阳能空调房 ,其特点在于一方面可充分利用太阳能吸附集热器和太阳能通风筒集热面有效降低房间的太阳热负荷 ;另一方面利用吸附床吸附制冷过程释放大量吸附热的现象 ,用... 详细信息

提出一种依靠吸附制冷原理制冷 ,结合太阳能通风筒强化自然通风的太阳能空调房 ,其特点在于一方面可充分利用太阳能吸附集热器和太阳能通风筒集热面有效降低房间的太阳热负荷 ;另一方面利用吸附床吸附制冷过程释放大量吸附热的现象 ,用于强化夜间自然通风。该文针对房间的通风率、进风温度变化等进行了分析 ,结果表明 ,典型条件下 ,采用 2 .5m2 的太阳能通风筒集热面、5m2 的吸附制冷系统集热面 ,一间 2 0m2 的太阳房日间通风率可达 10 0kg/h ,夜间通风率则可进一步提高 30 %～ 4 0 %。和其它空调装置相结合 ,该太阳房可用作独立式住宅 ,粮仓等。

关键词：吸附制冷自然通风太阳能通风筒吸附热太阳能空调房