EXPERIMENTAL INVESTIGATION OF THE CONVECTIVE HEAT TRANSFER IN A SPIRALLY COILED CORRUGATED TUBE WITH RADIANT HEATING

Milan Đorđević, Velimir Stefanović, Mića Vukić, Marko Mančić

DOI Number
10.22190/FUME171001027D
First page
495
Last page
506

Abstract


The Archimedean spiral coil made of a transversely corrugated tube was exposed to radiant heating in order to represent a heat absorber of the parabolic dish solar concentrator. The main advantage of the considered innovative design solution is a coupling effect of the two passive methods for heat transfer enhancement - coiling of the flow channel and changes in surface roughness. The curvature ratio of the spiral coil varies from 0.029 to 0.234, while water and a mixture of propylene glycol and water are used as heat transfer fluids. The unique focus of this study is on specific boundary conditions since the heat flux upon the tube external surfaces varies not only in the circumferential direction, but in the axial direction as well. Instrumentation of the laboratory model of the heat absorber mounted in the radiation field includes measurement of inlet fluid flow rate, pressure drop, inlet and outlet fluid temperature and 35 type K thermocouples welded to the coil surface. A thermal analysis of the experimentally obtained data implies taking into consideration the externally applied radiation field, convective and radiative heat losses, conduction through the tube wall and convection to the internal fluid. The experimental results have shown significant enhancement of the heat transfer rate compared to spirally coiled smooth tubes, up to 240% in the turbulent flow regime.

Keywords

Archimedean Spiral Coil, Corrugated Tube, Heat Transfer

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References


Morton, B. R., 1959, Laminar convection in uniformly heated horizontal pipes at low Rayleigh numbers, Quarterly Journal of Mechanics and Applied Mathematics, 12(4), pp. 410-420.

Ali, S., Seshadri, C., 1971, Pressure drop in Archimedean spiral tubes, Industrial and Engineering Chemistry Process Design and Development, 10(3), pp. 328-332.

Naphon, P., Wongwises, S., 2002, An experimental study on the in-tube convective heat transfer coefficients in a spiral coil heat exchanger, International Communications in Heat and Mass Transfer, 29(6), pp. 797-809.

Naphon, P., Suwagrai, J., 2007, Effect of curvature ratios on the heat transfer and flow developments in the horizontal spirally coiled tubes, International Journal of Heat and Mass Transfer, 50(3), pp. 444-451.

Nakayama, A., Kokubo, N., Ishida, T., Kuwahara, F., 2000, Conjugate numerical model for cooling a fluid flowing through a spiral coil immersed in a chilled water container, Numerical Heat Transfer, Part A, 37(2), pp. 155-165.

Kurnia, J.C., Sasmito, A.P., Mujumdar, A.S., 2011, Numerical investigation of laminar heat transfer performance of various cooling channel designs, Applied Thermal Engineering, 31(6), pp. 1293-1304.

Sasmito, A. P., Kurnia, J.C., Wang, W., Jangam, S.V., Mujumdar, A.S., 2012, Numerical analysis of laminar heat transfer performance of in-plane spiral ducts with various cross-sections at fixed cross-section area, International Journal of Heat and Mass Transfer, 55(21), pp. 5882-5890.

***, Pliable Corrugated Stainless Steel Resistant to Corrosion CSST Tubes for Plumbing, Heating Systems and Thermal Solar Plants, http://www.eurotis.it (Last Access: 13.07.2017)

Ho, C.K., Mahoney, A.R., Ambrosini, A., Bencomo, M., Hall, A., Lambert, T.N., 2012, Characterization of Pyromark 2500 for high-temperature solar receivers, Proc. 6th International Conference on Energy Sustainability of ASME, San Diego, USA, pp. 509-518.

Đorđević, M., Stefanović, V., Pavlović, S., Mančić, M., 2015, Numerical analyses of the radiant heat flux produced by quartz heating system, Proc. 3rd International Conference Mechanical Engineering in XXI Century, Niš, Serbia, pp. 75-80.

Đorđević, M., Stefanović, V., Kalaba, D., Mančić, M, Katinić, M., 2017, Radiant absorption characteristics of corrugated curved tubes, Thermal Science, DOI: 10.2298/TSCI160420263D.

Kline, S., McClintok, F., 1953, Describing uncertainties in single-sample experiments, Mechanical Engineering, 75(1), pp. 3-8.

***, 2007, IAPWS industrial formulation for the thermodynamic properties of water and steam (IAPWS-IF97), The IAPWS-IF97.

Đorđević, M., Stefanović, V., Vukić, M., Mančić, M., 2017, Experimental investigation on the convective heat transfer in a spirally coiled corrugated tube, Proc. 18th Symposium on Thermal Science and Engineering of Serbia, Soko Banja, Serbia.

***, 2001, Engineering and operating guide for DOWFROST and DOWFROST HD inhibited propylene glycol-based heat transfer fluids, Dow Chemical Company, USA, available at: http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_010e/0901b8038010e417.pdf?filepath=heattrans/pdfs/noreg/180-01286.pdf&fromPage=GetDoc (Last Access: 15.10.2017)

Churchill, S.W., Chu, H.H.S., 1975, Correlating equations for laminar and turbulent free convection from a horizontal cylinder, International Journal of Heat and Mass Transfer, 18, pp. 1323-1329.

Đorđević, M., Stefanović, V., Mančić, M., 2016, Pressure drop and stability of flow in Archimedean spiral tube with transverse corrugations, Thermal Science, 20(2), pp. 579-591.

Di Piazza I., M. Ciofalo, 2010, Numerical Prediction of turbulent flow and heat transfer in helically coiled pipes, International Journal of Thermal Sciences, 49, pp. 653-663.

Bergles, A. E., Morton, H. L., 1965, Survey and evaluation of techniques to augment convective heat transfer, Technical Report NO. 5382-34, Massachusetts Institute of Technology, USA.

Ciofalo, M., Collins, M.W., 1989, k-ε predictions of heat transfer in turbulent recirculating flows using an improved wall treatment, Numеrical Heat Transfer, 15, pp. 21-47.

Đorđević, M., Stefanović, V., Vukić, M., Mančić, M., 2016, Numerical investigation on the convective heat transfer in a spiral coil with radiant heating, Thermal Science, 20(Suppl. 5), pp. S1215-S1226.




DOI: https://doi.org/10.22190/FUME171001027D

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ISSN: 2335-0164 (Online)

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