Study on Flow Boiling Heat Transfer in Segmented Internally-Threaded Tube

Yang, J.; Xiao, Y. J.; He, Q.; Chen, J. Y.; Zhang, Y. S.; Jia, H. W.

doi:10.47176/jafm.15.05.1198

Study on Flow Boiling Heat Transfer in Segmented Internally-Threaded Tube

Document Type : Regular Article

Authors

College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

10.47176/jafm.15.05.1198

Abstract

The flow boiling heat transfer characteristics of R245fa in segmented internally-threaded tubes are studied experimentally. The heat transfer performances of smooth tube, front-threaded tube, rear-threaded tube, and full-threaded tube are compared. The experiments are carried out with heat flux ranging from 14.01 to 48.79 kW·m-2 and mass flux ranging from 125 to 375 kg·m-2·s-1. The experimental results show that the internal thread structure facilitates the heat transfer. At low mass fluxes and low heat fluxes, the heat transfer performance of the full-threaded tube is the best, while at high heat fluxes and high mass fluxes, that of the front-threaded tube is the best. Convective boiling is dominant in the smooth tube and the front-threaded tube, and corresponding heat transfer coefficients increase significantly with increasing mass flux. In contrast, nucleate boiling dominates in the rear- and full-threaded tube, and the heat transfer coefficients almost keep unchanged with increasing mass flux. The front- and rear-threaded tubes exhibit significantly different heat transfer characteristics, although they have the same heat transfer area. The effect of convective perturbation and bubble nucleation caused by the internal thread structure varies with the zone and intensity, leading to the change of the dominant mechanism of boiling heat transfer.

Keywords

References

Ali, R., B. Palm and M. H. Maqbool (2012). Flow Boiling Heat Transfer of Refrigerants R134a and R245fa in a Horizontal Micro-Channel. Experimental Heat Transfer 25(3), 181-196.##

Charnay, R., R. Revellin and J. Bonjour (2014). Flow boiling characteristics of R-245fa in a minichannel at medium saturation temperatures. Experimental Thermal and Fluid Science 59, 184–194.##

Ding, Y. J., J. H. Liu, L. Zhang and X. X. Yu (2020). Condensation heat transfer of R404A in horizontal inner-threaded tubes. Journal of Engineering for Thermal Energy and Power 35(12), 141-147##

Dittus, F. W. and L. M. K. Boelter (1985). Heat transfer in automobile radiators of the tubular type. International Communications in Heat and Mass Transfer 12(1), 3–22.##

Dorao, C. A., S. Drewes and M. Fernandino (2018a). Can the heat transfer coefficients for single-phase flow and for convective flow boiling be equivalent? Applied Physics Letters 112(6), 064101.##

Dorao, C. A., F. Morin and M. Fernandino (2018b). Experimental Study of Nucleate Flow Boiling to Convective Flow Boiling Transition in a Horizontal Heated Pipe. International Conference on Nanochannels, Microchannels, and Minichannels 2018-7682.##

Dastmalchi, M., A. Arefmanesh and G. A. Sheikhzadeh (2017). Numerical investigation of heat transfer and pressure drop of heat transfer oil in smooth and micro-finned tubes. International Journal of Thermal Sciences 121, 294-304.##

Feng, L. L., K. Zhong, X. Xiao, H. W. Jia and X. Luo (2022). Experimental investigation on flow boiling characteristics of HFO-1234yf in a 0.5 mm microchannel. International Journal of Refrigeration 136, 71-81##

Filho, E. and J. Jabardo (2014). Experimental study of the thermal hydraulic performance of sub-cooled refrigerants flowing in smooth, micro-fin and herringbone tubes. Applied Thermal Engineering 62(2), 461–469.##

Gnielinski, V. (1975). New equations for heat and mass transfer in the turbulent flow in pipes and channels. NASA STI/Recon Technical Report A, 41, 8.##

Hao, Q., J. Li and D. Geng (2020). Research on bubble behavior and heat transfer characteristics of flow boiling in rifled tubes. Refrigeration 48 (05), 59-65.##

He, G., F. Liu, D. Cai and J. Jiang (2016). Experimental investigation on flow boiling heat transfer performance of a new near azeotropic refrigerant mixture R290/R32 in horizontal tubes. International Journal of Heat and Mass Transfer 102, 561–573.##

He, K., J. Liu, L. Zhang and X. Yu (2019). Evaporation pressure drop characteristics of R404A in 5mm microfin tube. Chemical Industry and Engineerng Progess 38 (08), 3548-3555.##

Jiang, G. B., J. T. Tan, Q. X. Nian, S. C. Tang and W. Q. Tao (2016). Experimental study of boiling heat transfer in smooth/micro-fin tubes of four refrigerants. International Journal of Heat and Mass Transfer 98, 631-642.##

Jiang, J., G. He, Y. Liu, Y. Liu and D. Cai (2017). Flow boiling heat transfer characteristics and pressure drop of ammonia-lithium nitrate solution in a smooth horizontal tube. International Journal of Heat and Mass Transfer 108, 220–231.##

Kim, S. M. and I. Mudawar (2013). Universal approach to predicting saturated flow boiling heat transfer in mini/micro-channels – Part II. Two-phase heat transfer coefficient. International Journal of Heat and Mass Transfer 64, 1239–1256.##

Liang, X., D. Cai, J. Deng and G. He (2019). Characteristics of boiling heat transfer and pressure drop of R410A in 5 mm diameter inner-grooved copper tubes. Journal of Huazhong University of Science and Technology (Natural Science Edition) 47 (03), 1-6.##

Liu, Z. and R. H. S. Winterton (1991). A general correlation for saturated and subcooled flow boiling in tubes and annuli, based on a nucleate pool boiling equation. International Journal of Heat and Mass Transfer 34(11), 2759–2766.##

Lu, Y., L. Zhao, S. Deng, D. Zhao and D. Wang (2020). Two phase flow pattern and heat transfer characteristics of R245fa / R134a under non-uniform heat flow. Science China 65 (17), 1741-1751.##

Li, J. L., C. Z. Zhang., Q. Zhang and P. Yang (2022). Experimental investigation on onset of nucleate boiling and flow boiling heat transfer in a 5×5 rod bundle. Applied Thermal Engineering 208, 118263.##

Liu, J., J. Liu and X. Xu (2020). Diabatic visualization study of r245fa two phase flow pattern characteristics in horizontal smooth and microfin tube. International Journal of Heat and Mass Transfer 152(5), 51301-51314.##

Ma, H., G. Jiang and J. Bai (2011). Heat transfer characteristics of flow boiling in micro-fin tubes with R410A. CIESC Journal 62 (01), 41-46.##

Moffat, R. J. (1988). Describing the uncertainties in experimental results. Experimental Thermal and Fluid Science 1(1), 3–17.##

Mendoza-Miranda, J. M., A. Mota-Babiloni and J. Navarro-Esbr (2016). Evaluation of R448A and R450A as low-GWP alternatives for R404A and R134a using a micro-fin tube evaporator model. Applied Thermal Engineering 98, 330–339.##

Ouyang, X., J. Chen and T. Li (2015). Boiling heat transfer performance in three internal enhanced tubes. CIESC Journal 66(6), 2076-2081.##

Seo, K. and Y. Kim (2000). Evaporation heat transfer and pressure drop of R-22 in 7 and 9.52 mm smooth/micro-fin tubes. International Journal of Heat and Mass Transfer 43(16), 2869–2882.##

Seol, H. K., I. C. Chu., M. H. Choi and D. J. Euh (2018). Mechanism study of departure of nucleate boiling on forced convective channel flow boiling. International Journal of Heat and Mass Transfer 126, 1049–1058.##

Subhanker, P., M. Fernandinoa and C. A. Dorao (2021). On the scaling of convective boiling heat transfer coefficient. International Journal of Heat and Mass Transfer 164, 120589.##

Solanki, A. K. and R. Kumar (2018). Condensation of R-134a inside micro-fin helical coiled tube-in-shell type heat exchanger. Experimental Thermal and Fluid Science 93, 344-355.##

Targanski, W. and J. T. Cieslinski (2007). Evaporation of R407C/oil mixtures inside corrugated and micro-fin tubes. Applied Thermal Engineering 27(13), 2226–2232.##

Yoshida, S., H., Mori, H. Hong and T. Matsunaga (2011). Prediction of Heat transfer coefficient for refrigerants flowing in horizontal evaporator tubes. Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers 11, 67.##

Yang, C. M. and P. Hrnjak (2018). Effect of straight micro fins on heat transfer and pressure drop of R410A during evaporation in round tubes. International Journal of Heat and Mass Transfer 117, 924–939.##

Yang, C. M. and P. Hrnjak (2019). Effect of helical micro-fins on two-phase flow behavior of R410A evaporating in horizontal round tubes obtained through visualization. International Journal of Heat and Mass Transfer 144, 118654.##

Yang, C. M. and P. Hrnjak (2020a). A new flow pattern map for flow boiling of R410A in horizontal micro-fin tubes considering the effect of the helix angle. International Journal of Refrigeration 109, 154-160.##

Yang, C. M. and P. Hrnjak (2020b). Diabatic visualization shows effects of micro-fins on evaporation of R410A: Smooth, axial micro-fin, and helical micro-fin tubes. International Journal of Heat and Mass Transfer 150, 119276.##

Yu, X. X., J. H. Liu, K. He and H. Y. Wang (2019). Study on the Flow Boiling Heat Transfer Characteristics of R404A in 5 mm Micro-fin Tube. Journal of Engineering for Thermal Energy and Power 10, 16146.##

Zhao, X. and P. Bansal (2012). Flow boiling heat transfer analysis of new experimental data of CO2 in a micro-fin tube at −30 °C. International Journal of Thermal Sciences 59, 38–44.##