Abstract
A procedure for analyzing the effectiveness of using fuel and energy resources (FER) in sugar production, based on the developed idealized circuit of the thermal-technological complex (TTC) as the base for comparison was presented. This procedure makes it possible to quantify the level of perfection of existing and proposed thermal circuits, as well as the impact of measures for enhancing energy efficiency on their perfection. By idealizing technological and energy processes, a hypothetical TTC was synthesized, for which the minimum possible energy and entropy characteristics are determined. Under these conditions, the minimum possible heat consumption for the implementation of technological processes according to the classical heat technology circuit was calculated – 118.40 MJ/t; a "minimum" total increase in entropy from irreversible processes of the HTC – 314.68 kJ/(t·K); a minimum complex magnitude of specific consumption of conventional fuel – 0.8 % to m. b. The determined characteristics are absolute criteria for the efficiency of sugar production systems, since it is impossible to reach lower values under existing technology, quality of raw materials and other conditions. The content of the criteria of energy efficiency of TTC was stated and the system of coefficients was proposed: coefficient of total energy efficiency of the TTC, coefficient of energy efficiency of the system of heat supply of the technological processes and coefficients of energy efficiency of internal and external structures of the TTC. The proposed criteria provide an objective and thermodynamically correct characteristic of the TTC of different structures. The presented results of analysis of various measures for increasing the energy efficiency of sugar production show that only a gradual comprehensive reconstruction of an enterprise makes it possible to consistently reduce the FER consumption for technological needs, approaching the boundary values.
Highlights
IntroductionA modern sugar enterprise is a complex system of inextricably linked elements of technological, heat exchange and mechanical equipment, where complex physical and chemical processes are simultaneously implemented, closely interacting
Global trends of introduction of energy-efficient technologies and making production environmentally friendly are relevant for sugar enterprises, which in most cases require comprehensive modernization.A modern sugar enterprise is a complex system of inextricably linked elements of technological, heat exchange and mechanical equipment, where complex physical and chemical processes are simultaneously implemented, closely interacting
The procedure of comparing the indicators of fuel and energy resources (FER) consumption of the proposed thermal-technological complex (TTC) with the indicators of the Energy-saving technologies and equipment existing circuit, which is subjective, since it does not char- have this disadvantage. This solved the problem only acterize the level of energy perfection of a thermal circuit, partially, since the problem of the criterion that would dominates in sugar production
Summary
A modern sugar enterprise is a complex system of inextricably linked elements of technological, heat exchange and mechanical equipment, where complex physical and chemical processes are simultaneously implemented, closely interacting. The procedure of comparing the indicators of FER consumption of the proposed TTC with the indicators of the Energy-saving technologies and equipment existing circuit, which is subjective, since it does not char- have this disadvantage. This solved the problem only acterize the level of energy perfection of a thermal circuit, partially, since the problem of the criterion that would dominates in sugar production
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