Experimental Investigation of the Transient Cooling Characteristics of an Industrial Glass Tempering Unit
Energy consumption rate during the cooling process
of industrial glass tempering process is considerably high. In this
experimental study the effect of dimensionless jet to jet distance
(S/D) and jet to plate distance (H/D) on the cooling time have been
investigated. In the experiments 4 mm thick glass samples have been
used. Cooling unit consists of 16 mutually placed seamless aluminum
nozzles of 8 mm in diameter and 80 mm in length. Nozzles were in
staggered arrangement. Experiments were conducted with circular
jets for H/D values between 1 and 10, and for S/D values between 2
and 10. During the experiments Reynolds number has been kept
constant at 30000. Experimental results showed that the longest
cooling time with 87 seconds has been observed in the experiments
for S/D=10 and H/D=10 values, while the shortest cooling time with
42.5 seconds has been measured in the experiments for S/D=2 and
H/D=4 values.
[1] Lee, K.H. and Viskanta, R., "Quenching of flat glass by impinging air
jets", Numerical Heat Transfer, Part A: Applications, 1998, vol. 33(1),
pp. 5-22.
[2] Sozbir, N., and Yao, S.C., "Experimental investication of water mist
cooling for glass tempering" Atomization and prays, 2004, vol. 14, pp.
191-210.
[3] Kocabag, D., Glass Chemistry, Properties, Applications, Birsen Publish,
Istanbul, 2002
[4] VETSP, Ceramic and glass technology, glass sector in Turkey,
Vocational Education and Training System Strengthening Project,
Ankara, 2008.
[5] To, Q.D., He, Q.C., Cossavella, M., Morcant, K. Panait, A., and
Yvonnet, J., "The tempering of glass and the failure of tempered glass
plates with pin-loaded joints: Modelling and simulation", Materials and
Design, 2008, vol. 29, pp. 943-951.
[6] Turkbas, S. and Ataer, O.E. "Numerical modeling of heating and cooling
processes in glass tempering with mixed boundary conditions", J. Fac.
Eng. Arch. Gazi Univ., 2007, vol. 22(4), pp. 727-738.
[7] Essiz, O. "Technology innovations of Glass panels", I. National
Symposium on The Roof and Wall Coverings Modern Materials and
Technologies, 2004, pp. 73-82, ─░stanbul.
[8] Kanturer, T., "Energy intensive processes optimization in automobile
glass production", Trakya Univ. Science Inst, PhD Thesis, Edirne, 2009
[9] Nielsen, J.H., Olesen, P.N., and Stang, H. "The fracture process of
tempered soda-lime-silica glass", Experimental Mechanics, 2009, vol.
49, pp. 855-870.
[10] Buyukyildiz, A., "Automation of glass tempering furnace using PLC",
Engineering Journal, 2007, vol. 2(13), pp. 247-256.
[11] Monnoyer, F., and Lochegnies, D., "Heat transfer and flow
characteristics of the cooling system of an industrial glass tempering
unit", Applied Thermal Engineering, 2008, vol. 28 (17-18), pp. 2167-
2177.
[12] San, J.Y., and Lai, M.D., "Optimum jet-to-jet spacing of heat transfer for
staggered arrays of impinging air jets", International Journal of Heat and
Mass Transfer, 2001, vol. 44, pp. 3997-4007.
[13] Yazici, H., Akcay, M., Golcu, M., Koseoglu, M.F., Sekmen, Y.,
"Installation Of Auto Glass Tempering Experimental Unit and A Case
Study For Determination Of Heating-Cooling Periods" Electronic
Journal of Machine Technologies, 2011, vol. 8(1), pp. 57-68.
[1] Lee, K.H. and Viskanta, R., "Quenching of flat glass by impinging air
jets", Numerical Heat Transfer, Part A: Applications, 1998, vol. 33(1),
pp. 5-22.
[2] Sozbir, N., and Yao, S.C., "Experimental investication of water mist
cooling for glass tempering" Atomization and prays, 2004, vol. 14, pp.
191-210.
[3] Kocabag, D., Glass Chemistry, Properties, Applications, Birsen Publish,
Istanbul, 2002
[4] VETSP, Ceramic and glass technology, glass sector in Turkey,
Vocational Education and Training System Strengthening Project,
Ankara, 2008.
[5] To, Q.D., He, Q.C., Cossavella, M., Morcant, K. Panait, A., and
Yvonnet, J., "The tempering of glass and the failure of tempered glass
plates with pin-loaded joints: Modelling and simulation", Materials and
Design, 2008, vol. 29, pp. 943-951.
[6] Turkbas, S. and Ataer, O.E. "Numerical modeling of heating and cooling
processes in glass tempering with mixed boundary conditions", J. Fac.
Eng. Arch. Gazi Univ., 2007, vol. 22(4), pp. 727-738.
[7] Essiz, O. "Technology innovations of Glass panels", I. National
Symposium on The Roof and Wall Coverings Modern Materials and
Technologies, 2004, pp. 73-82, ─░stanbul.
[8] Kanturer, T., "Energy intensive processes optimization in automobile
glass production", Trakya Univ. Science Inst, PhD Thesis, Edirne, 2009
[9] Nielsen, J.H., Olesen, P.N., and Stang, H. "The fracture process of
tempered soda-lime-silica glass", Experimental Mechanics, 2009, vol.
49, pp. 855-870.
[10] Buyukyildiz, A., "Automation of glass tempering furnace using PLC",
Engineering Journal, 2007, vol. 2(13), pp. 247-256.
[11] Monnoyer, F., and Lochegnies, D., "Heat transfer and flow
characteristics of the cooling system of an industrial glass tempering
unit", Applied Thermal Engineering, 2008, vol. 28 (17-18), pp. 2167-
2177.
[12] San, J.Y., and Lai, M.D., "Optimum jet-to-jet spacing of heat transfer for
staggered arrays of impinging air jets", International Journal of Heat and
Mass Transfer, 2001, vol. 44, pp. 3997-4007.
[13] Yazici, H., Akcay, M., Golcu, M., Koseoglu, M.F., Sekmen, Y.,
"Installation Of Auto Glass Tempering Experimental Unit and A Case
Study For Determination Of Heating-Cooling Periods" Electronic
Journal of Machine Technologies, 2011, vol. 8(1), pp. 57-68.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:59619", author = "Hilmi Yazici and Mehmet Akcay and Mustafa Golcu and Mehmet F. Koseoglu and Yakup Sekmen", title = "Experimental Investigation of the Transient Cooling Characteristics of an Industrial Glass Tempering Unit", abstract = "Energy consumption rate during the cooling process
of industrial glass tempering process is considerably high. In this
experimental study the effect of dimensionless jet to jet distance
(S/D) and jet to plate distance (H/D) on the cooling time have been
investigated. In the experiments 4 mm thick glass samples have been
used. Cooling unit consists of 16 mutually placed seamless aluminum
nozzles of 8 mm in diameter and 80 mm in length. Nozzles were in
staggered arrangement. Experiments were conducted with circular
jets for H/D values between 1 and 10, and for S/D values between 2
and 10. During the experiments Reynolds number has been kept
constant at 30000. Experimental results showed that the longest
cooling time with 87 seconds has been observed in the experiments
for S/D=10 and H/D=10 values, while the shortest cooling time with
42.5 seconds has been measured in the experiments for S/D=2 and
H/D=4 values.", keywords = "Glass tempering, cooling, Reynolds number, nozzle", volume = "6", number = "1", pages = "236-5", }