METHODOLOGY OF SYSTEM ANALYSIS IN SOLVING TECHNICAL CONTRADICTIONS OF REFRIGERATION COMPLEXES OF AMMONIA PRODUCTION

Abstract

The features of the energy technological design of the secondary condensation unit of ammonia production are considered, in which absorption and refrigeration technological complexes (AHTK) are used for cooling circulating gas. Defects in the functioning of AHTC have been identified, which cause violation of the cooling regime of the circulating gas under conditions of change of temperature of the atmospheric air. The article formulates the direction of research of AHTC as a technical system from the standpoint of system analysis and offers main directions of improvement, which ensure stabilization of temperature of cooling of circulating gas in evaporators at the minimum possible level, and hence, improving the energy efficiency of ammonia production. The article provides element-by-element analysis of AHTC with definition of their useful functions and connections between them, which provided possibility of detection of undesirable effects, establishment of the main useful function and, consequently, administrative, technical and physical contradictions. The main attention is paid to the occurrence of a situation of inconsistency of the target parameter and the properties of the technical system, as well as why there are contradictory requirements to such parameter as condensation pressure. It is shown that the main useful function is essentially derived from the needs of the human operator, that is, AHTK is a subsystem relative to the anthropometric system. Using the list of standard operators for the resolution of physical contradictions applied the operator of improvement (Q-innovation) of the technical system for the separation of contradictory properties in space and established "free" resources (R-innovation) for the implementation of the operator, which allowed for the synthesis of the new technical system AHTC. The economic efficiency of the newly built system has been determined, which is ensured by reducing the cooling temperature of the circulating gas by an average of 3 ℃. Due to this decrease, the annual operating costs of natural gas by almost 1 million. m3.