The search of environment friendly solutions for waste management, along with increasing costs and recent regulations on waste disposal, leads toward the recovery of energy and requires research activities related to plant definition and thermo-economic comparison. On the other hand, energy recovery from waste has never been an easy task. The high pollutant level in waste combustion gases requires low maximum temperatures in thermodynamic cycles thus affecting the efficiency of the “heat to electricity” conversion process. The recent progress of high temperature fuel cells seems to bring a significant change in this scenario, thanks to the feasible combination with advanced gasification systems. A thermo-economic comparison of different solutions for energy recovery from industrial waste is reported, considering an advanced dual bed gasification-MCFC integrated plant. The solution has been applied to a confectionery plant. Even if this system seems to promise high thermodynamic efficiency, a lot of effort in research is necessary for technical analysis of the advanced plant open issues and for the thermo-economic evaluation of potential advantage over consolidated systems. The thermodynamic analysis has been conducted interfacing Aspen+ flowsheets developed with the integration of a proprietary numerical code. The definition of a complex plan of costs would have been presumptuous at this stage of the development; therefore, a reverse economic approach has been used and is suggested by the authors; a specific solver has been implemented for this purpose. An extensive survey of the confectionary plant has been conducted considering the present energy system, the current supplies, and the trends of the required energy needs. The results show that the proposed advanced energy system can represent a valid solution for both industrial waste management and for integration in energy supply.
[1]
Yoshihiro Mugikura,et al.
The effects of H{sub 2}S on electrolyte distribution and cell performance in the molten carbonate fuel cell
,
2000
.
[2]
Ryohei Yokoyama,et al.
Optimal unit sizing of fuel cell cogeneration systems in consideration of performance degradation
,
1998
.
[3]
Charles L. Hussey.
Room-Temperature Molten Salts : A Bright Future for Applications in Clean Technology
,
1999
.
[4]
Wim Turkenburg,et al.
Gasification of biomass wastes and residues for electricity production.
,
1995
.
[5]
Kirill V. Lobachyov,et al.
An advanced integrated biomass gasification and molten fuel cell power system
,
1998
.
[6]
Biagio Passalacqua,et al.
A SOLUBILITY STUDY OF PRELITHIATED NIO AND PRELITHIATED COBALTITE AS CATHODE MATERIALS FOR MCFC IN 62 LI-38 K EUTECTIC CARBONATE MELTS
,
1999
.
[7]
Carlo N. Grimaldi,et al.
Energy saving strategies in an actual confectionery plant
,
2000
.