针对传统吸收式冷热电联供循环存在制冷量和制冷效率低等缺陷，提出了一种新型低品位热驱动CO2\[emim\]\[Tf2N\]喷射-吸收冷热电联供循环。通过构建新型喷射-吸收冷热电联供循环理论模型及理论模拟计算，分析新循环的关键性参数对其性能的影响。结果表明：提高循环冷却水进口温度及冷冻水进口温度均可有效提高循环性能，冷却水进口温度在32~38 ℃范围内变化时，系统性能系数（COP）由0.148升至0.255，ηthm由43%升至53%，ηexg由44.3%升至46.3%；冷冻水进口温度在13~18 ℃范围内变化时，COP、ηthm和ηexg均呈上升趋势。提高膨胀机进口温度有利于ηthm、ηexg的提升，不利于COP的提升；膨胀机进口温度在180~210 ℃范围内变化时，ηthm由37%升至42%，ηexg由38.5%升至44.7%，COP由0.175降至0.13。在模拟工况下，传统吸收式冷热电联供循环中加入喷射器有利于提升循环性能，其随着冷冻水进口温度的升高而提升。

Aiming at the defects of traditional absorption combined cooling,heating and power(CCHP)cycle,such as low refrigeration capacity and low refrigeration efficiency,this paper develops a new CO2\[emim\]\[Tf2N\] ejectionabsorption CCHP cycle driven by lowgrade energy.By constructing a new CCHP cycle theory model and conducting theoretical simulation calculations,the influence of the key parameters of the new cycle on its performance is analyzed.The study found that increasing the cooling water inlet temperature and chilled water inlet temperature can effectively improve the cycle performance; when the cooling water inlet temperature changes within the range of 32 ℃~38 ℃,the COP is increased from 0.148 to 0.255,and the ηthm is increased from 43% to 53%,and ηexg increased from 44.3% to 46.3%; when the chilled water inlet temperature is changed from 13 °C to 18 ℃,COP、ηthm and ηexg are all increased; increasing the inlet temperature of the expander is conducive to the increase of ηthm and ηexg,which is not conducive to the improvement of COP; When the inlet temperature of the expander changes from 180 ℃ to 210 ℃,ηthm increases from 37% to 42%,and ηexg increases from 38.5% to 44.7%,η and COP are decreased from 0.175 to 0.13.Under simulated conditions,the addition of an ejector to a conventional CCHP cycle facilitates improved cycle performance and increases cycle performance as the chilled water inlet temperature increases.

TB61

国家自然科学基金(51566014)；内蒙古留学人员科技活动项目择优入选项目；草原英才