摘要
通过利用合成氨工业中的低品位热源,考察了溴化锂-氨-水三元吸收制冷系统制冷过程的可行性,测试了其热力效率。实验结果表明,在氨吸收制冷体系中添加一定量的溴化锂,可有效降低系统压力、提高其热力效率。当溴化锂浓度为30%,氨浓度为50%时,系统最高热力效率可达到0.32;减少冷冻水用量,热力效率可升高到0.44,此时冷冻水最低温度可达0℃;在同一氨浓度条件下,添加溴化锂可使氨水体系工作效率平均增加约35%左右。该结果证实了溴化锂-氨-水三元体系在工业余热回收应用的可行性,并为其推广应用提供了依据。
The feasibility of absorption refrigeration with LiBr-NH_3-H_2O ternary system as refrigerants was explored by using low grade heat in synthesis ammonia installation as heat resource. The coefficient of performance was determined. The results show that the addition of lithium bromide in ammonia-water binary system can lower the system pressure and in-crease the COP effectively. The maximum COP value can reach 0.32 when LiBr concentra-tion is 30% and ammonia concentration is 50%, and top COP can increase to 0.44 after decreasing the amount of chilled water. The average COP of ternary system is more than bi-nary system about 35%. This result approves the promising application and extension of Li-Br-NH_3-H_2 O ternary system for recovery of industrial waste heat.
出处
《石油化工应用》
CAS
2013年第8期98-102,共5页
Petrochemical Industry Application
关键词
吸收制冷
三元体系
可行性
合成氨
热力效率
absorption refrigeration
ternary system
feasibility
synthesis ammonia
COP
