HFCs/HCs+吸收剂工质对物理化学行为与吸收式动力循环特性

有效利用中低品位热，将其用于发电，对于节能减排意义巨大。吸收式动力循环是一种先进的中低品位热功转化技术。本申请选择氢氟烃类（HFCs）或烷烃类（HCs)+溶剂组合，以及HFCs/HCs+离子液体组合为工质对，采用化学热力学与热动力学方法，开展吸收式动力循环工质对基础研究。研究建立一套Calvet微量量热计和等温合成法气液相平衡同步测试实验系统；测定HFCs/HCs+吸收剂工质对体系的比热容、溶解度与气液相平衡、吸收/解吸热等基础数据。建立描述工质对体系的高压气液相平衡与热动力学的模型，阐明工质对分子间作用与工质对关键热物性，及其与吸收/解吸过程物理化学行为的关联规律。基于HFCs/HCs+吸收剂工质对热物性开展HFCs/HCs+吸收剂工质对吸收式动力循环的模拟研究，揭示工质对的平衡热物性以及吸收/解吸热动力学特征对循环特性的关联规律，提出工质对创新的方法，为开拓先进吸收式动力循环提供支撑。

Effective use of mid-low grade heat, e.g. use it for power generation, has huge significant meaning for saving energy and decreasing pollution. Absorption power cycle is a kind of advanced mid-low grade heat/power conversion technology. In this application, the combinations of hydrofluorocarbon (HFCs) or alkanes (HCs)+solvent as well as the combinations of HFCs/HCs +ionic liquid are selected as working pairs, to carry out the fundamental researches on absorption power cycle working pairs, using the approaches of chemical thermodynamics and thermal kinetics. A set of synchronization experimental system will be established, combing Calvet micro-calorimeter and gas-liquid equilibrium device of isothermal synthetic method. The specific heat capacity, solubility and gas-liquid equilibrium data, as well as the heat of absorption/desorption of HFCs/HCs+absorbent working pairs will be determined. Study and establish models of gas-liquid equilibrium and thermal dynamics for describing the high-pressure working pair systems. Clarify the molecular interactions mechanisms and its relationship with key thermophysical properties of working pairs, as well as the physicochemical behavior of absorption/desorption of HFCs/HCs+absorbent working pairs. Carry out the absorption power cycle simulation study on thermophysical properties of HFCs/HCs+absorbent working pairs. Reveal the relative mechanisms between the equilibria thermophysical properties and absorption/desorption kinetic characteristics versus the cycle performance. Provide theoretical supports for developing advanced absorption power cycle driven by the mid-low grade heat.