Abstract
We propose a method for creating optimum temperature microclimate modes at livestock facilities of different functional purpose by using a multi-layer heating floor. A structural mathematical model was constructed that makes it possible, under a preset operation mode of m-tiered tubular heaters, with respect to thermal conductivity of each layer of heat-generating modules, to define structural heat engineering parameters. We have obtained a general solution to the boundary value problem on determining the distribution of a steady temperature field in the multi-layered structure of MEHHS in the form of a prism with randomly arranged tubular heat sources. The respective mathematical model of MEHHS that was developed solves the task on the optimization of formation of temperature parameters of the heating floor surface with an accuracy to 0.5‒1 °С. We have studied the model of automated MEHHS for effectiveness of resource-saving electrotechnology and for techniques for creating optimal thermal parameters of the heating floor surface in technologically-active zones (TAZ) at a livestock facility. It is proposed to substantiate parameters of MEHHS systems in terms of creating automated means to form the microclimate at PF in the agricultural sector that would enable structural-functional control over energy fluxes of power to STH of MEHHS under the mode consumer-regulator, which could ensure preset levels of temperature at the heating floor surface at livestock facilities of different functional purpose.
Highlights
Food security of the country and the well-being of people are largely determined by the performance efficiency of agriculture, including livestock industry
multilevel electro-heat accumulation heating system (MEHHS) (Fig. 1) is one kind of systems for autonomous distributed electric heating, in which electrical energy is converted into thermal energy in special tubular electric heaters (STH), combined in the m-tiered units of heat-generating modules, located in the heat accumulation filler of the trench dug in soil of the floor of technologically active zones (TAZ) at production facilities (PF)
We have obtained a general solution to the boundary value problem on determining the distribution of a steady temperature field in the multi-layered structure of MEHHS in the form of a prism with randomly arranged tubular heat sources
Summary
Food security of the country and the well-being of people are largely determined by the performance efficiency of agriculture, including livestock industry. There is a need to provide premises with the heat modes that are almost twice different (for sows ‒ 18‒20 °C, for piglets during first day of birth ‒ 38‒39 °C) This is one of the reasons why energy expenditures account for almost 60 % of pork production cost [2, 3]. All the above testifies to the importance of this issue in terms of developments aimed at improving the existing, and creating the new, more energy- and resource-efficient means to create optimum microclimatic modes. This would make it possible to increase the volume of production of high-quality agricultural products
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