电子膨胀阀在电子吊舱制冷系统中的应用研究

介绍了军用飞机电子吊舱蒸汽压缩制冷环境控制系统的工作特点，给出了电子膨胀阀在电子吊舱地面模拟制冷系统中的初步试验研究结果。     

用废旧橡胶生产精细胶粉的空气涡轮制冷低温粉碎法

利用先进的空气涡轮制冷系统，在低温条件下，将废旧橡胶进行冷冻，粉碎，制成60目以上细度的精细胶粉，此法简称ATCG法，它的冷冻能耗成本仅为国际上通用的液氮法的十分之一，整个工艺过程不产生二次污染，为精细胶粉的制取开辟了一条新途径。     

Solar assisted cooling with sorption systems: status of the research in Mexico and Latin America

Solar refrigeration projects both national and international with sorption and other refrigeration systems have been developed in Mexico and other Latin American countries in the last 15 years. A review of the main projects, both for solar cooling and refrigeration and the results obtained are presented in this paper. A methodology where 19 solar technologies for cooling were identified is also presented. Although solar cooling is still not an economically viable technology, the advances made and the experience gained in the projects described and the improved systems envisaged, will make solar refrigeration systems play an important role in the future.     

蓄冰空调制冷新技术

文章叙述了中央人民广播电台新业务楼空调工程中采用蓄冰空调制冷新技术的情况。文章讲解了蓄冰空调原理，并对蓄冰制冷与常规制冷技术进行比较，指出：从节电上来考虑，前者具有经济性。文章最后列举了今后在设计和维护上，还有待解决的一些问题。     

LLL1030新型煤泥离心脱水机的设计与结构

阐述了筛篮倾角为20°的LLL1030新型煤泥离心脱水机的结构和主要技术特征,在综合分析国内、外主要设备类型的基础上,对该新型煤泥离心脱水机的主要参数进行了设计。给出了设计思路,并从分离因数、筛篮倾角、物料在脱水区的停留时间、生产能力、功率消耗和电机选用等多方面进行了相应的分析。     

磁热效应的直接测量及装置

磁热效应的测量有间接测量和直接测量两种方法。本文在比较两种测量方法各自特点的基础上,重点综述了直接测量装置的种类及特点;指出直接测量装置在室温磁制冷技术研究中的重要作用。     

单桩腿有限元分析

为保证桩腿在冬季冰区海域的安全使用,对桩腿结构进行冰载荷作用下的强度分析。应用ANSYS软件建立桩腿、地基、冰相互作用的仿真计算模型,实现桩腿的力学分析。对桩腿进行了强度校核,计算出冰载荷作用下桩腿的变形及其应力状态。计算结果表明,桩腿在此冰载荷作用下强度满足安全要求。     

Satellite SAR Remote Sensing of Great Lakes Ice Cover,Part 2. Ice Classification and Mapping

During the 1997 winter season, shipborne polarimetric backscatter measurements of Great Lakes (freshwater) ice types using the Jet Propulsion Laboratory C-band scatterometer, together with surface-based ice physical characterization measurements and environmental parameters, were acquired concurrently with Earth Resource Satellite 2 (ERS-2) and RADARSAT Synthetic Aperture Radar (SAR) data. This polarimetric data set, composed of over 20 variations of different ice types measured at incident angles from 0° to 60° for all polarizations, was processed to radar cross-section to establish a library of signatures (look-up table) for different ice types. The library is used in the computer classification of calibrated satellite SAR data. Computer analysis of ERS-2 and RADARSAT ScanSAR images of Great Lakes ice cover using a supervised classification technique indicates that different ice types in the ice cover can be identified and mapped, and that wind speed and direction can have an influence on the classification of water as ice based on single frequency, single polarization data. Once satellite SAR data are classified into ice types, the ice map provides important and necessary input for environmental protection and management, ice control and ice breaking operations, and ice forecasting and modeling efforts.     

丙烯压缩机振动偏高原因分析及解决方法

在丙烯腈生产过程中,发现其关键设备丙烯制冷压缩机轴振动值不断上升,针对此种情况对机组进行了分析与探讨,并制定解决方案。结果表明压缩机转子未采用正确的动平衡试验是造成轴振动的主要原因。采取正确的检维修方案是保证机组长周期运行、装置长周期运行的关键。     

三元吸收制冷的研究进展

氨—水和溴化锂—水是目前使用最广泛的两种二元吸收工质对，但各有缺陷，为此人们希望采用三元吸收工质克服这两种二元工质对的不足。国外许多学者对三元吸收制冷尤其是氨—水—溴化锂三元吸收制冷作了大量理论和试验研究，国内未见这方面的文献发表，该文从物性和循环两方面对这些研究作简单介绍，并对三元吸收制冷研究简单展望。