Modelling of superheated steam drying for combined heat and power at a corn ethanol plant using Aspen Plus software

R. Vance Morey, Huixiao Zheng, Nalladurai Kaliyan, Matthew V. Pham

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A superheated steam drying (SSD) model was developed in Aspen Plus software to determine energy and water recovery for drying the co-products in a corn ethanol plant. The SSD was integrated into a biomass integrated gasification combined cycle (BIGCC) heat and power production model developed for a 190 million litre per year corn ethanol plant. The BIGCC system was fuelled with either corn stover or a mixture of syrup and corn stover at a rate of 110MW. Results were compared to estimates for steam tube drying (STD). Energy consumed for the SSD was 759-804kJ kg-1 of water removed compared to 2660-2690kJkg-1 for the STD. Approximately 1.3l of water were recovered per litre of ethanol produced with the SSD, with none for the STD. Less power was generated in the BIGCC system with SSD due to its smaller heat sink than for the BIGCC system with STD.

Original languageEnglish (US)
Pages (from-to)80-88
Number of pages9
JournalBiosystems Engineering
Volume119
DOIs
StatePublished - Mar 2014

Bibliographical note

Funding Information:
This research was supported by the Xcel Energy Renewable Development Fund .

Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.

Keywords

  • Combined heat and power
  • Corn ethanol
  • Distillers grains
  • Energy savings
  • Superheated steam drying
  • Water usage reduction

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