Abstract
The present research addresses solution to the relevant problem of energy efficient heating supply of pig farms with barns of pigs and a sow by applying combined heating systems based on local heating of places for animal keeping. A physical model is developed, which offered the possibility to carry out a complex of experimental studies on determining temperature mode in the barn for piglets and a sow. We established the patterns of influence of thermal capacity of individual heating devices, in particular the heating panel in the place of sow keeping, as well as the heating mat and the infrared heater, on the thermal condition of specific areas. Assessment of the influence of the main factors of the research on its original characteristics was performed. We obtained the equation for determining relative air temperature in the zone of piglets and sow keeping, which depends on relative height of the operation area at a variable air velocity, as well as on incoming air temperature, influenced by the number of animals and background temperature in the premises. Graphical dependences were constructed and empirical dependences were derived based on the conducted experimental studies that can be used in subsequent engineering calculations. Based on the obtained results, we compiled recommendations on the choice of thermotechnical parameters of heating devices, particularly their geometric dimensions, material and method of location of heating elements.
Highlights
The standards of living of the population are closely linked to development of agriculture, including livestock production, in which swine breeding is one of the most important areas
During experiments at the third of the considered stages, which were performed on the experimental setup (Fig. 8), we studied the temperature mode in the piglets’ feeding zone, provided by the infrared heater
We proved the expediency of application of the combined heating system, based on background air supply of the pig farm and local heating of places of animal keeping, heating panels for the zone of a sow, the heating mat and the infrared radiator for the piglets’ zone
Summary
The standards of living of the population are closely linked to development of agriculture, including livestock production, in which swine breeding is one of the most important areas. If in the area of animals’ keeping the air temperature is lower than 15 oC, piglets under such conditions get too cold, often get sick and may die It is much more difficult for an adult pig to tolerate high temperature than low temperature. A temperature increase influences negatively the vital activity of the pig’s organism and we can observe thermal overload These data indicate that in pigs and sow barns, it is necessary to create a separate microclimate, which corresponds to physiological needs of various categories of animals. One of the ways of solving the problem of heating supply to barns of piglets and sows is introduction of energy-efficient heating systems, which make it possible to maintain a desired temperature mode in animal keeping places. 5/8 ( 89 ) 2017 of modern technological process in pigs and sow barns, temperature modes, as well as physiology of animals
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