A METHOD OF DEFINING THE REFRIGERATION CAPACITY OF AIR CONDITIONING PLANTS FOR COMFORT AND ENERGETICS

Євген Іванович Трушляков, Андрій Миколайович Радченко, Ян Зонмін, Анатолій Анатолійович Зубарєв, Веніамін Сергійович Ткаченко

Abstract


The efficiency of applying air conditioning units for comfort and energetics for a certain period, as well as any power plant, is determined by the effect obtained, primarily in the form of reducing fuel consumption over the year or increasing the production of electrical (mechanical) energy in the case of air conditioning at the heat engine inlet and by annual cold production as an indicator of the efficiency of using the cooling capacity of comfort air-conditioning plants. Since in both cases the effect depends on the duration and depth of cooling, it is quite justified to estimate it in the first approximation by the thermal hourly potential, which is the result of summation hour by hour of air temperature drops multiplied by duration of operation at a lowered temperature and, thus, takes into account current climatic conditions. Obviously, the realization of the cooling potential (air conditioning) of the ambient air depends on the installed (design) cooling capacity of the air conditioning units, which, in turn, must take into account the fluctuations in thermal loads in accordance with the current variable thermal and humidity parameters of the ambient air. Based on the different rates of the increment of the annual thermal hourly cooling potential with an increase in the installed cooling capacity of the air conditioning unit due to a change in the heat load in accordance with current climatic conditions during the year, it is necessary to choose such a design thermal load on the air conditioning unit (its installed cooling capacity) that ensures maximum or close to it the annual thermo-hour cooling potential at a relatively high rate of its increment, respectively, and the effect of cooling in the form of a decrease in fuel consumption per year in the case of air conditioning at the inlet of heat engine and annual cold production of comfort air conditioning units. It is shown that under the same climatic conditions during the year and the depth of ambient air cooling, the rational values of the design cooling capacity of air conditioning units for comfort and energy purposes are the same.

Keywords


air conditioning; cooling capacity; thermohour potential cooling; annual cold production

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DOI: https://doi.org/10.32620/aktt.2019.1.06

Copyright (c) 2019 Євген Іванович Трушляков, Андрій Миколайович Радченко, Ян Зонмін, Анатолій Анатолійович Зубарєв, Веніамін Сергійович Ткаченко