An Energy-Efficient Electric Plant for Hot Steam and Water Supply of Agricultural Enterprises

Tikhomirov, Dmitry; Kopylov, S. I.

doi:10.3103/s1068371218070106

Cited by 6 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Gas-liquid two-phase flow plays a critical role in natural and industrial systems, which exists in air bubbles in the ocean [ 1 ], steam in the water of an electric power plant [ 2 ], carbon dioxide in methylamine of the chemical engineering [ 3 ], and oxygen gas in the hot metal of steelmaking [ 4 ]. The gas-liquid flow generates the deformation in two phases and leads to a constant change of the interphase and the medium distribution, which greatly affects the flow, heat, and mass transfer characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…(1) The breakup frequency models are inconsistent and different models show completely different behaviors, where closure parameters change the conditions, such as integration limits, can have to be set. (2) In coalescence frequency models, the main difference in the models present results from the calculation of u rel and modification factors Y, Π which need further study to obtain collision frequency. Wang et al gave a small collision frequency for small bubbles due to the larger mean distance between small bubbles than big ones in the case of the same bubble number [47,48].…”

mentioning

confidence: 99%

“…effect of the bubble that reduces the free space for bubble movement and causes an increase in the collision frequency. Π factor considering the ratio of the mean bubble distance to the turbulent path length Group I bubble with another Group I bubble to generate a Group II bubble(12,2) coalescence of a Group I bubble with a Group II bubble to generate a new Group…”

mentioning

confidence: 99%

See 1 more Smart Citation

Interfacial Area Transport Equation for Bubble Coalescence and Breakup: Developments and Comparisons

Chen

Wei

Ding

et al. 2021

Entropy

View full text Add to dashboard Cite

Bubble coalescence and breakup play important roles in physical-chemical processes and bubbles are treated in two groups in the interfacial area transport equation (IATE). This paper presents a review of IATE for bubble coalescence and breakup to model five bubble interaction mechanisms: bubble coalescence due to random collision, bubble coalescence due to wake entrainment, bubble breakup due to turbulent impact, bubble breakup due to shearing-off, and bubble breakup due to surface instability. In bubble coalescence, bubble size, velocity and collision frequency are dominant. In bubble breakup, the influence of viscous shear, shearing-off, and surface instability are neglected, and their corresponding theory and modelling are rare in the literature. Furthermore, combining turbulent kinetic energy and inertial force together is the best choice for the bubble breakup criterion. The reviewed one-group constitutive models include the one developed by Wu et al., Ishii and Kim, Hibiki and Ishii, Yao and Morel, and Nguyen et al. To extend the IATE prediction capability beyond bubbly flow, two-group IATE is needed and its performance is strongly dependent on the channel size and geometry. Therefore, constitutive models for two-group IATE in a three-type channel (i.e., narrow confined channel, round pipe and relatively larger pipe) are summarized. Although great progress in extending the IATE beyond churn-turbulent flow to churn-annual flow was made, there are still some issues in their modelling and experiments due to the highly distorted interface measurement. Regarded as the challenges to be addressed in the further study, some limitations of IATE general applicability and the directions for future development are highlighted.

show abstract

“…Structuralanalysisoftheruralenergybasestatus,thatofenergyequipmentfleet,aswellasthe developedrecommendationsonupgradingenergysystemsandsamplesofenergyfacilities,enable to form the inventory of first-order energy-saving activities comprising (Tikhomirov, 2016) In the sphere of centralized energy supply development, the most important task is the advancementandreconstructionofruralenergysupplysystemsandnetworksonthebasisofnew conceptoftheirengineering,constructionofnewpowertransmissionlinesandreengineeringof existingoneswiththeaccountofperspectiveloads,enhancementoftheirreliabilityandenergyloss reductionin1.5to2times.…”

Section: Introductionmentioning

confidence: 99%

Energy Consumption Optimization in Agriculture and Development Perspectives

Tikhomirov

Izmailov

Lobachevsky

et al. 2020

International Journal of Energy Optimization and Engineering

View full text Add to dashboard Cite

In this article, indicators of energy consumption in agriculture for Russian Federation are discussed, starting from the year 1990, and their forecast values for the period up to 2030 with the analysis of the decay in the period from 1991 to 2010 and gradual growth of energy resources consumption started in 2010 and continued to the present day has been analyzed. The outlines of the strategy of rural energy base development and optimization have been considered. Demand, development, and implementation conditions of decentralized energy supply systems have been substantiated, and their features, composition, and application field have been specified. It has been shown that the major energy resource of standalone energy systems is local and renewable energy sources and of agricultural production wastes. Methods and technologies for the conversion of renewable energy sources (RES), biomass, and waste of agricultural production into heat and power have been characterized.

show abstract

An Energy-Efficient Electric Plant for Hot Steam and Water Supply of Agricultural Enterprises

Cited by 6 publications

References 1 publication

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

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

Interfacial Area Transport Equation for Bubble Coalescence and Breakup: Developments and Comparisons

Energy Consumption Optimization in Agriculture and Development Perspectives

Contact Info

Product

Resources

About