Exergy analysis of powdered product from thin stillage technology using steam ejector heat pump
DOI: 10.21047/1606-4313-2016-15-1-55-59
UDC 663.52, 664.647.3
Muravev A.S. , Shevtsov A.A.
Abstract
The article deals with the evaluation of using energy wrapping up and the development of appropriate technology effectiveness and technical measures based on the analysis result to reduce losses in the process of evaporation and spray drying. Calculation of energy performance for technological line of processing thin stillage to powdery product, based on the theory of exergy analysis, is given. Installation working on the heat pump principle, including an ejector as a refrigeration system element simplest to mainten, was choosen to implement the technology. The most effective temperature range of the evaporator steam jet refrigeration system is determined. According to the dependency of exergy efficiency and exergy destruction on the evaporator temperature is is shown that the system is the most efficient at the evaporator temperature range of 278-282 K. Exergy efficiency of line is 5.47%, which indicates an increase of thermodynamic perfection of the system using a steam jet refrigeration plant that ensures the use of heat transfer fluids: air and hot water in the recirculation mode. Software-logicical control algorithm of stillage utilization technology control is one of the research results.
Keywords: energy efficiency, ejector, exergy, heat pump, stillage, thin stillage, evaporation, spray drying.
UDC 663.52, 664.647.3
Exergy analysis of powdered product from thin stillage technology using steam ejector heat pump
Abstract
The article deals with the evaluation of using energy wrapping up and the development of appropriate technology effectiveness and technical measures based on the analysis result to reduce losses in the process of evaporation and spray drying. Calculation of energy performance for technological line of processing thin stillage to powdery product, based on the theory of exergy analysis, is given. Installation working on the heat pump principle, including an ejector as a refrigeration system element simplest to mainten, was choosen to implement the technology. The most effective temperature range of the evaporator steam jet refrigeration system is determined. According to the dependency of exergy efficiency and exergy destruction on the evaporator temperature is is shown that the system is the most efficient at the evaporator temperature range of 278-282 K. Exergy efficiency of line is 5.47%, which indicates an increase of thermodynamic perfection of the system using a steam jet refrigeration plant that ensures the use of heat transfer fluids: air and hot water in the recirculation mode. Software-logicical control algorithm of stillage utilization technology control is one of the research results.
Keywords: energy efficiency, ejector, exergy, heat pump, stillage, thin stillage, evaporation, spray drying.
Русский
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