Energy savings potential of a desiccant assisted hybrid air source heat pump system for residential building in hot summer and cold winter zone in China

In hot summer and cold winter zone in China, air conditioning system has four running modes yearly including cooling with dehumidification, cooling, dehumidification and heating in residential buildings. The conventional air source heat pump (ASHP) system is not designed to independently control temperature and humidity, and is not very suitable for the dehumidification mode in the view of building energy consumption. A novel ASHP system combining radiant cooling/heating for residential buildings was presented. The main feature of this hybrid ASHP system is that desiccant wheel and cooling coil accomplish dehumidification process together, and the regenerative heat needed by the desiccant wheel is supplied by the condenser dissipated heat. Based on simulation studies and performance analysis, this paper predicts the primary energy consumption of the hybrid ASHP system in comparison with the conventional ASHP system during the cooling and heating seasons. It was found that primary energy requirement can be reduced by more than 8% in cooling with dehumidification mode, by 50% in dehumidification mode, and by more than 14% in heating mode. The study results prove that the hybrid ASHP system can keep great energy saving and running cost saving yearly, especially in the dehumidification process.     

综合保税区升级发展布局模式研究——以武汉东湖综合保税区的升级发展为例

在中国(上海)自由贸易试验区成立发展的大背景下,武汉东湖综合保税区的规划从综合保税区的功能延伸布局及产业升级这两方面进行分析,提出了区港联动、区区联动的功能延伸布局模式,以及从单一生产到多元科研的升级方向,为合理、科学地构建自由贸易试验区的雏形提供了可行的升级发展布局建议。     

用膨润土制备层状结晶二硅酸钠的研究

介绍了用廉价膨润土制备层状结晶二硅酸钠的方法。采用由膨润土制备造纸黑液处理絮凝剂后的残渣,以烧碱按一定的摩尔比浸取SiO2,再经浓缩、干燥、热处理,便可制备出符合质量要求的产品。此法克服了水玻璃法生产成本高,石英砂-烧碱法高压操作、工艺复杂的矛盾。