化工学报 ›› 2023, Vol. 74 ›› Issue (5): 1875-1883.DOI: 10.11949/0438-1157.20221680
收稿日期:
2022-12-31
修回日期:
2023-04-20
出版日期:
2023-05-05
发布日期:
2023-06-29
通讯作者:
吴建华
作者简介:
雷博雯(1996—),女,博士研究生,bowenlei@hotmail.com
基金资助:
Bowen LEI(), Jianhua WU(), Qihang WU
Received:
2022-12-31
Revised:
2023-04-20
Online:
2023-05-05
Published:
2023-06-29
Contact:
Jianhua WU
摘要:
天然工质丙烷(R290)GWP接近零,对环境友好,热物理性质优良,具有良好应用前景。高背压旋转压缩机运行压比小时,R290绝热指数小导致的排气温度低特点突出。R290在高背压旋转压缩机油池中溶解度大,R290/润滑油混合物黏度低,可能难以满足曲轴/轴承系统润滑,影响压缩机可靠性。通过研究低压比工况下,R290在润滑油中溶解度及R290/润滑油混合物黏度与其过热度的关系,提出高补气过热度经济器循环,利用冷凝器出口高温与补气饱和温度的温差带来的剩余热量提高补气过热度,从而控制排气过热度和R290/润滑油混合物的黏度。同时,高补气过热度经济器循环可以有效提高系统性能,蒸发温度-2.89℃,冷凝温度51.5℃时,相比单级循环,COP提升11.4%,单位容积制热量提升23.4%。
中图分类号:
雷博雯, 吴建华, 吴启航. R290低压比热泵高补气过热度循环研究[J]. 化工学报, 2023, 74(5): 1875-1883.
Bowen LEI, Jianhua WU, Qihang WU. Research on high injection superheat cycle for R290 low pressure ratio heat pump[J]. CIESC Journal, 2023, 74(5): 1875-1883.
图11 补气饱和温度和补气温度对R290/POE VG68混合物黏度的影响
Fig.11 Effect of injection saturation temperature and injection temperature on the R290/POE VG68 mixture viscosity
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