Design and analysis of heat recovery system in bioprocess plant

• Heat integration of a bioprocess plant is studied.
• Bioprocess plant produces yeast and ethyl-alcohol.
• The design of a heat recovery system is performed by batch pinch analysis.
• Direct and indirect heat integration approaches are used in process design.
• The heat recovery system without a heat storage opportunity is more profitable.

The paper deals with the heat integration of a bioprocess plant which produces yeast and ethyl-alcohol. The referent plant is considered to be a multiproduct batch plant which operates in a semi-continuous mode. The design of a heat recovery system is performed by batch pinch analysis and by the use of the Time slice model. The results obtained by direct and indirect heat integration approaches are presented in the form of cost-optimal heat exchanger networks and evaluated by different thermodynamic and economic indicators. They signify that the heat recovery system without a heat storage opportunity can be considered to be a more profitable solution for the energy efficiency increase in a plant.

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