Energy Consumption Optimization in Agriculture and Development Perspectives

The authors studied the scientific and technical literature regarding the microclimate influence on dairy cattle productivity. It was found out that the building microclimate parameter deviation from certain limit values reduces milk yield by 10-20 percent decrease the live weight gain by 20-30 percent increases the mortality of young animals by 5-40 percent and reduces the number of lactations by 15-20 percent for the herd. (Research purpose) To conduct a survey of modern microclimate systems and their technical implementation for livestock buildings, suggesting the best option while reducing energy costs. (Materials and methods) A classification scheme was provided for microclimate systems. The factors affecting the microclimate of livestock premises were presented in one figure. The main functions of ventilation systems in animal husbandry were identified. The conditions for the use of natural and forced (tunnel) ventilation systems were described. The devices for changing the microclimate on the premises were presented. The possibility of using an overlapped ridge in the area of the roof ridge was considered to catch the airflow and minimize moisture penetration. (Results and discussion) To decrease energy consumption, it was proposed to shift from a supply ventilation system to a natural and hybrid ventilation system, which contains an air removal system, lighting equipment, heating elements, sensors, fans with spray nozzles, sashes. (Conclusions) It was found out that in summer, natural ventilation is unable to prevent heat stress from cows. It was determined that in case of heat stress within 60 days, losses could amount to 4.2 million rubles. To ensure optimal microclimate conditions and reduce costs from heat stress, it was proposed to use an innovative natural and hybrid ventilation system. The calculations showed that a 60-day energy consumption of the proposed system equals 264 thousand rubles.

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Section: техника для животноводства Machinery For Animal Industryunclassified

Development of an EnergyEfficient Microclimate System for Dairy Herd Loose Keeping

Dovlatov

Юрочка

2021

S-h. maš. tehnol.

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“…The importance of energy provision for agricultural enterprises has been growing due to the ascendant increase of energy resource pricing compared to that of the agricultural products. The development and implementation of energy-saving technologies and technical aids into the production processes of the agricultural sector are one of the ways to reduce the energy component in agricultural production costs [1,2]. One basic and essential problem of stock breeding is to ensure animal-friendly temperatures in sow houses where, during the cold seasons, two different temperature fields have to be maintained: one for breeding sows, and the other for prenursery pigs [3].…”

Section: Introductionmentioning

confidence: 99%

Local Heating through the Application of a Thermoelectric Heat Pump for Prenursery Pigs

et al. 2023

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Mathematical formulation of the animal thermal status has been developed, with the account of two convenience conditions and heat balance, for the floor-mounted heating panel for prenursery pigs. The borders of the heat flux variation range for the floor-mounted heating panel have been determined corresponding to the animal-friendly conditions for prenursery pigs of various age groups. The block diagram of the energy-saving floor-mounted heating panel, comprising the thermoelectric assembly operating in the heat pump mode, has been designed. The method has been described and the corresponding calculations have been made for the basic thermal parameters of the floor-mounted local heating installation, for prenursery pigs, with the application of a thermoelectric heat pump. The experimental installation sample of 116 W thermal capacity (for the heat transfer coefficient from 0.9 W·m−2·K−1 to 1.0 W·m−2·K−1 and floor temperature in the range of 5 °C to 6 °C) has been developed and manufactured for local heating for prenursery pigs managed in gestation crates. Laboratory tests of the experimental sample of the floor-mounted heating panel have demonstrated high energy efficiency of the heating installation under development. The energy-saving effect (approx. 15% compared to the series-produced equipment designed for local heating of young stock) of the developed installation was achieved owing to the partial heat recuperation of the exhaust ventilating air.

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“…Maintaining the necessary microclimate parameters in cattle management premises of farms normally requires up to 60% of the total thermal energy consumed for heat supply purposes. The efficiency enhancement of the heat supply and ventilation systems aimed at the reduction of energy consumed for providing and maintaining normative microclimate parameters, in cattle management premises of livestock farms, is an essential objective [1,2]. For regions with a winter design temperature below −20 • C, either the availability of an entrance hall at the gate of cattle management premises or the application of air curtains with air heating is a mandatory requirement [3].…”

Section: Introductionmentioning

confidence: 99%

Study of Potential Application Air Curtains in Livestock Premises at Cattle Management Farms

et al. 2023

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Recommendations on the selection of air curtains and the calculation of their parameters for livestock premises in cattle management farms are made. The air curtain functioning principle is analyzed from the air jet theory point of view. The block diagram and modular design of air curtains with a variable air jet direction vector and with controlled slit width are designed. Laboratory tests of the newly designed air curtain structure are performed in accordance with the microclimate requirements for the cattle management farm premises. Based on the experimental results, the major air curtain parameters are calculated for the range from 10° to 60° of angle α between the direction of the air jet outward from the air curtain slit and aperture plane, and for the air curtain slit width b0 in the range from 0.05 m to 0.15 m with the account of the wind speed Vw variations. Calculated values for amounts of energy that have to be consumed to ensure the required air jet velocity, in the output from the air curtain, and those for the quantity of thermal energy required to heat the air supplied to the air curtain, depending on the angle α and on the slit width b0, can be helpful for selecting the power capacity of both the air curtain fan and electric heater. A block diagram of the air curtain control for cattle management farm premises is designed, enabling automatic control of the airflow rate, the angle of the air jet output from the air curtain slit, and the temperature of the heated air supplied to the air curtain, considering particular climate conditions. According to the preliminary estimate, applications of the newly designed air curtain will make it possible to reduce the energy consumed to maintain the required microclimate conditions in cattle management premises by 10% to 15% in the cold period.

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Energy Consumption Optimization in Agriculture and Development Perspectives

Cited by 15 publications

References 4 publications

Development of an EnergyEfficient Microclimate System for Dairy Herd Loose Keeping

Development of an EnergyEfficient Microclimate System for Dairy Herd Loose Keeping

Local Heating through the Application of a Thermoelectric Heat Pump for Prenursery Pigs

Study of Potential Application Air Curtains in Livestock Premises at Cattle Management Farms

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Energy Consumption Optimization in Agriculture and Development Perspectives

Cited by 15 publications

References 4 publications

Development of an Energy­Efficient Microclimate System for Dairy Herd Loose Keeping

Development of an Energy­Efficient Microclimate System for Dairy Herd Loose Keeping

Local Heating through the Application of a Thermoelectric Heat Pump for Prenursery Pigs

Study of Potential Application Air Curtains in Livestock Premises at Cattle Management Farms

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Product

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Development of an EnergyEfficient Microclimate System for Dairy Herd Loose Keeping

Development of an EnergyEfficient Microclimate System for Dairy Herd Loose Keeping