以空气为携热介质的开式太阳能吸收式制冷循环研究与分析

RESEARCH AND ANALYSIS FOR OPEN ABSORPTION REFRIGERATION CYCLE DRIVEN BY HOT AIR HEATED BY SOLAR ENERGY

以空气为携热介质的开式太阳能吸收式制冷循环为研究对象,根据工作循环的特点给出了循环工作流程及计算方法,并对循环进行了详细的计算和分析。得出循环COP值、制冷量与湿空气出口处工作溶液与空气的水蒸气分压力差随热空气温度、环境空气温度和相对湿度之间的关系。通过研究发现,当热空气达到一定温度时,循环具有较好的稳定性。与闭式太阳能吸收式制冷循环相比,开式循环具有启动快、COP值高、系统简单、造价低等优点,特别适合在高温炎热地区使用。

The open absorption refrigeration cycle driven by hot air which is heated by solar energy was proposed. The cycle flow and calculation models were given in terms of the operation characteristic of the cycle. The detailed calculation and analysis for the cycle were done. The relationships of the cycle COP (coefficient of performance), amount of cooling and the steam pressure difference between in working solution and in wet air at the generator upside with the hot air temperature, the ambient air temperature and relative humidity were found. The cycle had a better operation stability while the hot air temperature was at 90℃. Compared with traditional absorption solar refrigeration cycle, the open cycle had some advantages such as start-up fast, COP higher, system simple, cost lower and so on. The cycle was very suitable to be used in hot climate regions.