Abstract
Heating calculation of the surface condensate heat recovery unit (HRU) installed behind the BKZ-420-140 NGM boiler resulting in determination of HRU heat output according to fire gas value parameters at the heat recovery unit inlet and its outlet, heated water quantity, combustion efficiency per boiler as a result of installation of HRU, and steam condensate discharge from combustion products at its cooling below condensing point and HRU heat exchange area has been performed. Inspection results of Samara CHP BKZ-420-140 NGM power boilers and field tests of the surface condensate heat recovery unit (HRU) made on the bimetal calorifier base КСк-4-11 (KSk-4-11) installed behind station no. 2 Ulyanovsk CHP-3 DE-10-14 GM boiler were the basis of calculation. Integration of the surface condensation heat recovery unit behind a steam boiler rendered it possible to increase combustion efficiency and simultaneously decrease nitrogen oxide content in exit gases. Influence of the blowing air moisture content, the excess-air coefficient in exit gases, and exit gases temperature at the HRU outlet on steam condensate amount discharge from combustion products at its cooling below condensing point has been analyzed. The steam condensate from HRU gases is offered as heat system make-up water after degasification. The cost-effectiveness analysis of HRU installation behind the Samara CHP BKZ-420-140 NGM steam boiler with consideration of heat energy and chemically purified water economy has been performed. Calculation data for boilers with different heat output has been generalized.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. A. Kudinov and S. K. Ziganshina, Energy—Saving in Thermal Energetics and Thermal Technology (Mashinostroenie, Moscow, 2011) [in Russian].
D. Yu. Bukhonov and Yu. V. Borisov, “Condensate production from leaving smoke gases at gas fuel firing,” Nov. Ross. Elektroenerg., No. 1, 42–45 (2005).
A. A. Kudinov and S. K. Ziganshina, “Natural gas firing product cooling in condensation thermal utilisers,” Promyshl. Energ., No. 4, 39–43 (2010).
A. K. Vnukov and F. A. Rozanova, “Increase of efficiency of natural gas using in hot—water boilers,” Energetik, No. 4, 75–78 (2013).
I. L. Ionkin, A. V. Ragutkin, P. V. Roslyakov, V. M. Supranov, M. N. Zaichenko, and B. Luning, “Effect of condensation utilizer on the work of vapor and hot-water gas boilers,” Teploenergetika, No. 5, 44–50 (2015). doi 10.1134/S0040363615050033
R. S. Chinangad, B. I. Master, and J. R. Thome, “Helixchanger heat exchanger: Single–phase and two–phase enhancement,” in Compact Heat Exchangers and Enhancement Technology for the Process Industries (Begell House, New York, 1999).
G. A. Dreizer, “Modern problems of cryogenic heat transfer and its enhancement (Generalization of experimental results. Practical recommendations of different applications),” in Low Temperature and Cryogenic Refrigeration (Kruger Academic, Dordrecht, 2003).
S. K. Ziganshina, “On possibility of modernization of BKZ-420-140 NGM boiler of Samarsk. Heat and power plant,” Energetik, No. 1, 60–62 (2014).
I. Z. Aronov, Contact Water Heating by Products of Natural Gas Firing (Nedra, Leningrad, 1990).
L. G. Semenyuk, “Condensate production at deep cooling of firing products,” Promyshl. Energ., No. 8, 47–50 (1987).
A. A. Kudinov, V. A. Antonov, and Yu. N. Alekseev, “Energy conservation in gasified boiler installations by deep cooling of the combustion products,” Therm. Eng. 47, 65–67 (2000).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © S.K. Ziganshina, A.A. Kudinov, 2016, published in Teploenergetika.
Rights and permissions
About this article
Cite this article
Ziganshina, S.K., Kudinov, A.A. Thermal gain of CHP steam generator plants and heat supply systems. Therm. Eng. 63, 587–591 (2016). https://doi.org/10.1134/S004060151604011X
Published:
Issue Date:
DOI: https://doi.org/10.1134/S004060151604011X