Adsorption heat pump using porous materials - Development of environmental friendly energy system

本项目由化学、化学工程和建筑领域的研究人员对吸附热泵（AHP）技术进行了研究。本项目的目的是：(1)提高AHP系统的产量；(2)促进AHP模块的传热传质扩散；(3)冷热能有效利用系统的优化与控制技术。在系统设计方面，提出了采用圆盘模块式吸收体的酒精/活性炭吸收式热泵（AHP），以生产高质量、高功率的冷热能。实验研究了AHP吸附和再生过程的传热传质特性。结果表明，该吸附/再生循环周期比SAC填料床型吸附器短约10倍。SAC调节降低了AHP系统单位重量的平衡吸附量，但增加了AHP系统单位时间的冷热输出。目前的系统在350 K左右的再生温度下工作良好，并且很容易在270 K左右产生冷热。结果表明，利用该吸附剂装置制备的AHP可作为一种紧凑型制冷装置，利用低温余热源产生273 K以下的冷热能。其次，采用多种物理化学方法对沸石、FSM-16、MCM-41和非晶二氧化硅等多孔二氧化硅材料的吸附性能进行了表征。发现它们的表面有自由基位点，对某些化学反应具有活性。最后，以工厂冷心驱动的AHP为热源，模拟了包括办公室、住宅和商店在内的局部热能系统。阐明了在地方能源系统中使用层次分析法的有效性。

In this project, adsorption heat pump (AHP) technology was investigated by the researchers in the field of chemistry, chemical engineering and architecture. The aim of this project is (1) increase in the output of AHP system, (2) the promotion of heat and mass transfer diffusion in the AHP module, and (3) the optimization and controlling technology of the effective system for use of cold heat energy. As for the system design, the alcohol/activated carbon absorption heat pump (AHP) with a disk-module -type absorber was also proposed for producing of high quality and high power cold heat energy. The heat and mass transfer characteristics in adsorption and regeneration processes of the AHP operation were experimentally investigated. It was found that the adsorption/regeneration cycle period was about 10 times shorter than that of the packed-bed-type adsorber of SAC. The equilibrium adsorption capacity per weight was reduced by SAC modulation, but the cold heat output per unit time of the proposed AHP system was enlarged. The present system works well with regeneration temperatures of around 350 K and readily generates cold heat at around 270 K. It is concluded that AHP fabricated with the proposed disk-module adsorber units can be used as a compact refrigeration unit for generating cold heat energy below 273 K by using a low temperature waste heat energy source. Secondly, the adsorption properties of porous silica materials, i.e., zeolites, FSM-16, MCM-41 and amorphous silica, were characterized by various physico-chemical techniques. It was found that they have radical sites which is active for some chemical reactions on their surfaces. Finally, the local heat energy system, including offices, residences and stores, with AHP drove by cold heart from factories as heat sources was simulated. The effectiveness of the use of AHP for the local energy system was clarified.