IMPROVEMENT OF FEASIBILITY STUDY METHODS OF UTILIZATION HEAT EXHAUST AIR SYSTEMS OF PRODUCTION BUILDINGS

Abstract

Due to the constant growth of energy costs, the management of enterprises is forced to find ways to reduce energy consumption and the first step in this process is to conduct an energy audit. One of the significant consumers of thermal and electrical energy in industry is the ventilation and air conditioning systems. The main way to reduce the energy consumption of these systems is to implement the utilization of exhaust air heat, and the main problem is the complicated design of heat recovery devices and economic assessment of the feasibility of their implementation. Despite the obvious need for implementation of systems for the utilization of exhaust air heat, the high cost of their implementation raises questions about the feasibility of implementation and cost recovery of these energy-saving measures.      

One of the proven areas of heat recovery in exhaust systems is the use of exhaust gas recuperators. These devices allow to carry out utilization of the heat of the exhaust air and transfer the heat to the heating of the supply air in the systems located at certain distances from each other. Installation of heat-retaining and heating heat exchangers in existing systems allows to slightly increase the load on the fan and do without its replacement.

According to the results of the actually performed energy audit at one of the industrial enterprises of Ukraine, the task in the technical and economical arrangement of the given method of energy-saving was set. 

The article considers approaches to the construction of a system of hydrochloric acid heat utilization of the exhaust air heat from the warehouse premises. The calculation and selection of heat exchangers were carried out, and the economical feasibility of the implementation of this energy utilization system was determined. The results of the research are implemented in the thermodernization of a real industrial facility. In the example of this object economical indicators of the implementation of systems of hydrocarbon, and recycling were determined.  

The use of systems for utilization of exhaust heat allows to significantly increase the energy efficiency of ventilation systems, reduce heating costs, reduce the cost of production and increase the profitability of the enterprise.