Raising evaporative cooling potentials using combined cooled ceiling and MPCM slurry storage

Evaporative cooling is able to generate the cooling medium at a temperature approaching to the ambient wet bulb temperature. In this paper, a low-energy air-conditioning strategy is proposed, which is a combination of cooled ceiling (CC), microencapsulated phase change material (MPCM) slurry storage and evaporative cooling technologies. The assessment of evaporative cooling availability and utilization is done for five representative climatic cities, including Hong Kong, Shanghai, Beijing, Lanzhou and Urumqi in China, and the energy saving potential of the proposed air-conditioning system is analyzed by using a well validated building simulation code. The results indicate that the new system offers energy saving potential up to 80% under northwestern Chinese climate and up to 10% under southeastern Chinese climate. The optimal design method of the slurry storage tank is also proposed based on the slurry cooling storage behaviors and cooling demand variations of the ceiling panels.     

慢流CO_2激光器最佳冷却条件的实验研究

螺旋水冷慢流CO_2激光器件比普通慢流器件输出激光功率高16%。瓷管慢流器件气、水逆流较气、水顺流运用激光功率高7.6%。给出了最佳冷却条件。     

Lethality calculation for thermal processes with different heating and cooling rates

In many thermal processes, the time constants f_h and f_c for the heating and cooling periods differ. This can cause difficulties in calculating the process lethality. This paper presents a simple method for taking into account this change in the time constant. The author's formula method is tested against simulated data from finite-difference computations, both for f_h=f_c and for f_h≠f_c , and found to be at least as accurate as the best previous formula method.     

碳含量和控冷工艺对盘条ER70S-6性能及组织的影响

对3炉不同碳含量的焊接用钢盘条ER70S-6控冷工艺进行了研究，发现提高吐丝温度虽可以降低盘条的强度，但盘条中易出现混晶组织，碳含量小于0.08%可以使盘条的强度控制在较低水平。盘条拉拨试验结果表明，马氏体组织是引起脆断的重要原因，对盘条化学成分和冷却速度的控制是生产具有优良加工性能焊接用钢盘条的必要措施。     

内冷——绝热氨合成塔内件和准等温型甲醇合成塔内件技术总结

介绍了内冷－绝热氨合成塔内件和准等温型甲醇合成塔内件的技术特性、操作要点及应用情况，并对存在的问题进行了分析。     

空气被动冷却技术在建筑中的应用——空气被动冷却仿生学以及其在建筑中的运用

该文从仿生学原理叙述了空气被动冷却的技术特点,概述了空气被动冷却技术在建筑物中的应用方式。同时结合具体实例,描绘了空气被动冷却技术在建筑节能中的应用。     

高炉炉墙状况诊断及冷却壁状态在线检测系统开发与应用

介绍了济钢第一炼铁厂 6#高炉利用高炉冷却壁进出水温差实施炉体检测的装备配置和通过水温差及炉体热负荷间接判断炉墙结厚、渣皮脱落以及冷却壁状态诊断的应用情况。实践证明 ,该在线检测系统能及时发现冷却水管漏水、堵塞等故障 ,有利于延长冷却壁的寿命 ,且该系统软件界面友好、直观 ,对准确判断、分析高炉炉况有直接的帮助意义     

钢筋控轧控冷工艺的节能分析

对钢筋的控轧控冷工艺和传统生产工艺做了对比分析，根据现场数据计算分析了控轧控冷工艺的节能效果。分析结果表明：采用控制轧制工艺可节约加热炉能源，采用控制冷却工艺可节约热处理能源。控轧与控冷相结合不但可实现节能，还可大幅度提高钢材综合力学性能，减少氧化烧损，降低生产成本，具有良好的综合经济效益。     

1000 ton per day ice plant for underground cooling at Harmony gold mine

Up to now all refrigeration plants used for mine cooling have used chilled water. When these refrigeration plants are situated on the surface, large quantities of water must be sent into the mine and pumped back to the surface again. It was suggested that a viable and economic alternative was to make ice on the surface and send this into the mine to reduce the quantity of water required. This Paper describes the world's first very large ice plant used for mine cooling. Ice from this plant is used to cool hot water originating at an underground fissure, and, in addition, provides cooling in the mine.     

在汽雾冷却下转炉炉壳的瞬态温度场和水流密度理论分析

以有限元为基础，模拟了转炉炉壳的瞬态温度场。对温度-时间历程进行热分析，得出了汽雾冷却的水流密度。