Research on the Heat Transfer Characteristic of Boiler under Solar-Coal Complementary Electric Generation Condition

Abstract:

Solar-coal complementary electric generation is a new way to utilize solar thermal, however, using solar thermal to replace the heat transfer of some heating surfaces will inevitably affects the stability and efficiency of boiler operation, and the running characteristics of the boiler will affects the utilization capacity of the solar thermal in turn. A 300MW unit thermal- circulation boiler has been studied. A research on calculation of heat transfer characteristic has been made. The influence of solar-energy utilization on heat transfer has been analyzed. Calculation and analysis indicate that using solar thermal to heat the feedwater can decrease coal consumption. 87.2% of the coal consumption decrement can be attributed to the replacement of coal by solar thermal, 12.8% of the coal consumption decrement is leaded by the boiler efficiency increment; Solar thermal should not be introduced into the boilers with low exhaust gas temperature and the boilers running at low load operation; Using solar thermal to heat the feedwater leads to decreasing spray water; Through the boiler calculation in this paper, the maximum solar thermal utilization capacity is 19.27MW.

• Periodical: Advanced Materials Research (Volumes 347-353)
• Pages: 836-842
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.347-353.836
• Online since: October 2011
• Authors: Zheng Yang Gao, Bo Wen Zhang, Rui Qing Xia, Wen Hui Feng, Tian Long Wang
• Keywords: Complementary Electric Generation, Solar Thermal, Utility Boiler

References

[1] R.Hosseini,M.Soltani,G.Valizadeh.[J]. Renewable Energy, 2005, 30(10):1541~1555.

[2] Eck M, Steinmann WD.[J]. J Sol Energ-T Asme, 2005, 127(8): 371―380.

[3] Yang YP, Cui YH, Hou HJ.[J].Science in China Series E:Technological Sciences, 2008, 51(8):1211~1221.

[4] Yan WP,Chen YY.[J].china machine press,2007,27(2):80-86.

[5] Gou CH,Cai RY,Hong H.J. china machine press,2006,26(7):1-5.

[6] Cheng QM,Weng YW,Weng SL.[J].china machine press,2006,26(4):31-35.

[7] Jurgen D,Michael G,Ulf H,et al.[J].Energy,2004,29(5-6):947-959.

[8] Mechthild H,Heiner F,Jurgen R.[J].Energy,2004,29(5-6):935-945.

[9] Luo YJ,He ZN.solar energy application technology [M].Beijing:Chemical Industry Press, 2005.

[10] Odeh S D,Behnia M,Morrison G L,et al.[J].Energy Conversion and Management,2003, 44(15): 2425-2443.

DOI: 10.1016/s0196-8904(03)00011-6

[11] Jurgen D,Michael G,Ulf H,et al.[J]. Energy,2004,29(5-6):947-959.

[12] Mechthild H,Heiner F,Jurgen R.[J].Energy,2004,29(5-6):935-945.

[13] Typical thermalcalculation methods of boiler units[M].china machine press, (1976)