Evaluation of the performance of a hydrogen enriched combustion system for ceramic sector

摘要

In this experimental study, the energy and exergy analyses were performed to determine optimum hydrogen mass flow rate for hydrogen enrichment application in a ceramic kiln. The effects of multiple-point and single-point injection of hydrogen at different mass flow rates on energy and exergy efficiencies were evaluated. The hydrogen-enriched natural gas combustion experiments were carried out for a ceramic kiln including 102 burners. Optimum hydrogen flow rates were determined as 1.08 kg/h and 1.16 kg/h for multiple-point and single-point applications, respectively. For 40 x 40 cm ceramic tile production at the optimum hydrogen mass flow rate and with minimum natural gas consumption, energy efficiencies were found as 63.13% and 62.63% and exergy efficiencies were reached as 43.12% and 42.74% for multiple-point and single-point applications, respectively. A significant difference between multiple-point and single-point applications has not been found for both energy and exergy efficiencies. The hydrogen enrichment system has a short payback time after the first three months of operation in the present study. It is concluded that application of hydrogen enrichment in ceramic kilns have a great potential for energy saving and energy efficiency. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.