Numerical simulation and experimental investigation on performance of liquid-liquid ejector

被引：0

作者：

Li, Yinlin ^{[1
,2
]}

Tan, Laizhi ^{[3
]}

Chen, Chuanbao ^{[3
]}

Wu, Wei ^{[2
]}

Zhang, Xiaosong ^{[1
]}

Du, Kai ^{[1
]}

机构：

[1] School of Energy and Environment, Southeast University

[2] School of Energy and Mechanics, Nanjing Normal University

[3] Nanjing Wu-Zhou Refrigeration Group Co. Ltd.

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2014年 / 44卷 / 02期

关键词：

Circular spraying flow rate; Ejector; Entrainment ratio; Horizontal-tube falling film;

D O I：

10.3969/j.issn.1001-0505.2014.02.012

中图分类号：

学科分类号：

摘要：

A three-dimensional model of the ejector is proposed. And then the relations of main structural parameters with the jet performance of the ejector are simulated by using refrigerant R134a as the working fluid. Simulation results indicate that the entrainment ratio increases sharply with the decrease of the nozzle exit diameter, increases gradually with the increase of the mixing section diameter, and descends quickly with the increase of the distance between the nozzle exit and the mixing section inlet. And the entrainment ratio ascends slightly with the increase of the working fluid flow rate, nozzle length and diffuser length. Moreover, the mixing section length has a strong influence on the pressure of the mixed fluid. To obtain the optimal pressure field of the mixing fluid, the optimum length of the mixing section is 45 mm. Finally, an air-source falling-film heat pump unit is established, and the experimental results show that the performance of the ejector is remarkable. And that the cooling load increases gradually with the increase of the circular spraying flow rate, moreover, the performance coefficient increases first, and then decreases with the increment of the circular spraying flow rate.

引用

页码：289 / 294

页数：5

共 12 条

[1]

He S., Li Y., Wang R.Z., Progress of mathematical modeling on ejectors, Renewable and Sustainable Energy Reviews, 13, 8, pp. 1760-1780, (2009)

[2]

Chen X.J., Omer S., Worall M., Et al., Recent developments in ejector refrigeration technologies, Renewable and Sustainable Energy Reviews, 19, pp. 629-651, (2013)

[3]

Abdulateef J.M., Sopian K., Alghoul M.A., Et al., Review on solar-driven ejector refrigeration technologies, Renewable and Sustainable Energy Reviews, 13, 6-7, pp. 1338-1349, (2009)

[4]

Dahmani A., Aidoun Z., Galanis N., Optimum design of ejector refrigeration systems with environmentally benign fluids, International Journal of Thermal Sciences, 50, 8, pp. 1562-1572, (2011)

[5]

Zhu Y., Li Y., Novel ejector model for performance evaluation on both dry and wet vapors ejectors, International Journal of Refrigeration, 32, 1, pp. 21-31, (2009)

[6]

Bergander M.J., Butrymowics D., Smierciew K., Et al., Refrigeration cycle with ejector for second step compression, International Refrigeration and Air Conditioning Conference, (2010)

[7]

Chen X., Zhou Y., Yu J., A theoretical study of an innovative ejector enhanced vapor compression heat pump cycle for water heating application, Energy and Buildings, 43, 12, pp. 3331-3336, (2011)

[8]

Sumeru K., Nasution H., Ani F.N., A review on two phase ejector as an expansion device in vapor compression refrigeration cycle, Renewable and Sustainable Energy Reviews, 16, 7, pp. 4927-4937, (2012)

[9]

Bilir N., Ersoy H.K., Performance improvement of the vapor compression refrigeration cycle by a two-phase constant area ejector, International Journal of Energy Research, 33, 5, pp. 469-480, (2009)

[10]

Sarkar J., Geometric parameter optimization of ejector-expansion refrigeration cycle with natural refrigerants, International Journal of Energy Research, 34, 1, pp. 84-94, (2010)

← 1 2 →