Model Investigation on Coupled Throttling Flow Characteristic of Stepped Capillary Tube with R22

Abstract:

In order to calculate the structure size of stepped capillary tube, the experiments of flow characteristic of it were performed. The experience benchmark model of flow characteristics of R22 was set up through experimental method in specific reference conditions based on the impedance calculation method. The variable working condition model suitable for a range of conditions was obtained through fixing the condition based on the reference model. The mass flow rate of refrigerant R22 in two stepped capillary tubes with different size was tested. The experimental results show that the stepped capillary tube model has a high precision and working condition of certain flexibility. The deviation of cooling and heating flow between the calculated values and measured values are less than±10%. The model can meet the need of matching for stepped capillary tube on the heat pump type air conditioner with R22.

• Periodical: Advanced Materials Research (Volumes 960-961)
• Pages: 648-653
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.960-961.648
• Online since: June 2014
• Authors: Yan Sheng Xu
• Keywords: Model, R22, Stepped Capillary Tube, Throttle

References

[1] C.L. Zhang, G.L. Ding: Journal of Shanghai Jiaotong University. Vol. 35(2001), p.1178[In Chinese].

[2] Y.S. Xu, Q.B. He, M.C. Li, et al.: Fluid Machinery., Vol. 41(2013), p.62[In Chinese].

[3] Khan M: Appl Therm Eng. Vol. 29(2009), p.1426.

[4] Bittle R R, Wolf D A, Pate M B.: HVAC&R Res. Vol. 4(1998), p.27.

[5] Choi J, Kim Y, Kim H Y. : International journal of refrigeration. Vol. 26(2003), p.881.

[6] Melo C, Ferreira R, Neto C B, et al.: Applied Thermal Engineering. Vol. 19(1999), p.669.

[7] Mitta M, Kumar R, Gupta A.: International journal of refrigeration. Vol. 33(2010), p.840.

[8] C J L Hermes, C Melo, F T Knabben: Applied Thermal Engineering. Vol. 30 (2010), p.449.