SUBSTANTIATING ENVIRONMENTALLY FRIENDLY METHOD TO IMPROVE ENERGY EFFICIENCY OF PREMISES FOR KEEPING NURSING SOWS

Abstract

Improving energy efficiency of sow-houses, in the process of designing the reconstruction, is of practical
importance for production. This is due to the fact that in Ukraine there are pig farms and complexes, which
were designed mainly according to construction standards of 1995. The aim of this study was to justify
environmentally friendly method to increase energy efficiency of premises for milking sows and to develop
an algorithm for its determining. General scientific (experiment, analysis, synthesis) methods were applied
in solving the tasks. In addition, the main microclimate parameters and temperature of the building depending
on the seasons of the year were investigated. Geometric, heat engineering and energy characteristics of
the sow-house were determined. It was found that the pigsty was characterized by a high value (0.54 m-1) of
compactness index. At the same time, the mass heat capacity of enclosing constructions, per 1 m3 of
ventilated volume, made only 0.08 MJ per 1 0 K, which indicated insufficient heat resistance of the house. As
a result, in winter, at an average daily outdoor temperature of minus 2.9 0C, the indoor temperature dropped
to 16.7 0C. Thus, it was 1.30C below the minimum admissible value, according to the VNTP-AIC-02.05
standard. Performance indicators of milking sows showed a significantly higher value of the average live
weight of piglets at weaning by 0.19 kg in spring and 0.29 kg in summer, as compared with winter (p<0.05
and 0.01). At the same time, preservation of piglets litter before weaning was by 3.8–4.6 %. higher The
economic efficiency of external wall insulation with ecologically safe Technofas effect heat-insulating
material having a thickness of 50 mm was substantiated. An algorithm for determining energy efficiency the
sow-house was developed. It is determined by the total annual consumption of energy, expressed in kW•h,
divided by the value of the ventilated volume and annual turnover rate ratio of one individual stall place. It
has been determined that walls’ thermal insulation of the heated pigsty contributes to improving its energy
characteristics by 23.2 %. The estimated payback period in case of wall isolation with thermal insulation
material will be 39.3 months. In addition, thermal insulation is environmentally important in saving 21.15
thousand kW/h of specific heat consumption. This is equivalent to approximately 7.42 tons of conventional
fuel.