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Thermoeconomic analysis applied in cold water production system using biogas combustion.

Author(s) : CASTRO VILLELA I. A. de, SILVEIRA J. L.

Type of article: Article

Summary

The use of biogas generated in the Wastewater Treatment Plant of a Dairy industry is proposed. The objective of the paper is to apply a thermoeconomic analysis to the supplementary cold water production of an absorption refrigeration system (NH3 + H2O) by the burning of such gas. The exergoeconomic analysis is carried out to allow a comparison between an absorption refrigeration system and of an equivalent compression refrigeration system that uses NH3 as the working fluid. The proposed exergoeconomic model uses functional diagrams and allows one to obtain the exergetic incremental functions for each component individually and for the system as a whole. The model minimizes the exergetic manufacturing cost which represents the cost of supplementary cold water production at 1°C (exergetic base) needed for this dairy's cold storage. As a conclusion, the absorption refrigeration system is better than the compression refrigeration system, when the biogas cost is not considered.

Details

  • Original title: Thermoeconomic analysis applied in cold water production system using biogas combustion.
  • Record ID : 2005-2855
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 25 - n. 8-9
  • Publication date: 2005/06

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