THERMAL SCIENCE

International Scientific Journal

Ehab S. Mahmoud

,

Mohamed Rady

,

A. A. Abuhabaya

,

Adel A. Elsamahy

SEPARATE AND COMBINED INTEGRATION OF KALINA CYCLE FOR WASTE HEAT RECOVERY FROM A CEMENT PLANT

ABSTRACT
This article reports on using Kalina cycle for waste heat recovery from a cement plant. Two design alternatives have been investigated using separate and combined waste heat recovery from the kiln, cooler, and preheater. Measurements and analysis have been performed to determine the waste heat from different stages of the cement manufacturing lines. The annual heat losses from the kiln surface, preheater, and the cooler are estimated as 79.23 GWh, 44.32 GWh, and 43.6 GWh at average temperatures of about 314℃, 315℃, and 254℃, respectively. Analysis and optimization of using Kalina cycle for waste heat recovery from the kiln shell, cooler and preheater to produce electricity have been carried out using ASPEN software. Parametric study has been carried out to determine the design parameters for Kalina cycle including turbine inlet pressure, mass-flow rate, and NH3-H2O concentration. The value of net power output using combined waste heat recovery is about 7.35 MW as compared to 6.86 using separate waste heat recovery design with a total cost saving of about 23%.
KEYWORDS
Kalina cycle, waste heat recovery, low-grade heat source, ammonia-water mixture, power, Cement industry, heat loss, power consumption
PAPER SUBMITTED: 2021-04-18
PAPER REVISED: 2021-05-26
PAPER ACCEPTED: 2021-05-28
PUBLISHED ONLINE: 2021-07-10
DOI REFERENCE: https://doi.org/10.2298/TSCI210418230M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 2, PAGES [1907 - 1925]
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Separate and combined integration of Kalina cycle for waste heat recovery from a cement plant

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence