变质量体系能量转换及储存系统动态特性研究

【作者】 姜俊华；

【导师】 徐士鸣；

【作者基本信息】 大连理工大学 ， 制冷与低温工程， 2004， 硕士

【摘要】 本文是以水／溴化锂为工质的潜能储存系统为研究对象，给出了变质量体系能量转换及储存技术的基本概念，就是将用电低谷时段的电能先转换为工作溶液的化学势能并以溶液化学势能的形式储存，在用电平峰或高峰时段，可以通过一定的手段将储存的潜能转换为所需的冷或热能。由于在蓄能系统中仅用一个溶液储罐，在储罐充、释能过程中溶液的质量不断发生变化而使系统运行的工作参数发生变化。本文主要讨论在变质量体系能量转换及储存技术充、释能过程中因质量变化所产生的内部扰动的系统充、释能过程的动态特性。当充能始、终时刻溶液储罐内溴化锂质量分数差为0.11时，蓄能系统中仅用了一个0.6m~3的溶液储罐和一个0.17m~3的水储罐可储存109KWh的制冷潜能，转移电网负荷23.3KWh，蓄能系统运行的COP值可达到4.67。 论文所得出的结论，可以为潜能储存技术的深入研究提供一定的理论参考和思路。更多还原

【Abstract】 This paper presents a basic concept of variable mass energy transformation and storage technology. In this technology, electric energy is firstly transformed into the chemical potential of working fluids and stored as a form of the potential during off-peak time. Then the potential will be transformed into the cold or heat energy needed by a certain measure during peak time. Because there is only one working solution storage tank used in the energy transformation and storage system, the mass of solution in the tank changes continuously during energy charging or discharging process, which makes the operation parameters of the system change. In this paper, the dynamic behavior of variable mass energy transformation and storage technology which is caused by internal turbulence because of mass changing during energy charging and discharging process is studied and discussed. While LiBr mass factor difference in the solution storage tank between energy charging start and end is 0.1, the energy transformation and storage system in which there are a 0.6 m3 solution storage tank and a 0.17 m3 water storage tank can store about 109 kWh refrigerating potential and shift about 23.3 kWh electric load in off-peak time. The coefficient of performance of the system operation can reach 4.67.The conclusions of the paper can provide some theoretical references for deep research work.更多还原