Energy Point Of View Research Articles

Interactions of Ruddlesden-Popper Phases and Migration-Induced Field-Stabilized Polar Phase in Strontium Titanate

This work focuses on the validation of a possible connection of the known Ruddlesden-Popper (RP) phases and the novel concept of the migration-induced field-stabilized polar (MFP) phase. To study this subject, model structures of RP phases in bulk strontium titanate are analyzed by means of density functional theory (DFT). The obtained geometries are compared to experimental MFP data. Good agreement can be found concerning atomic displacements in the pm range and lattice strain inferred by the RP phases. Looking at the energy point of view, the defect structures are on the convex hull of the Gibb’s free energy. Although the dynamics to form the discussed defect models are not addressed in detail, the interplay and stability of the described defect model will add to the possible structure scenarios within the near-surface region of strontium titanate. As a result, it can be suggested that RP phases generally favor the MFP formation.

Risk Assessment and Selection of Low Gwp Refrigerants for Heat Pumps in Residential Applications

This work deals with the risk related to the flammability and toxicity of low Global Warming Potential (GWP) refrigerants used in heat pumps for residential applications. Some new generation refrigerants were analyzed assuming to make a drop-in for a typical 50 kW heat pump, suited for small multi-family buildings (4 ÷ 6 dwellings). The theoretical maximum Coefficient of Performance (COP) was calculated for the selected fluids, identifying the best performing one from an energy point of view. Subsequently, an analysis of some of the potentially more dangerous accident scenarios was performed, considering the outdoor/indoor release of gases. More in detail, two accident scenarios were analyzed, assuming a refrigerant leak from a hole in the pipeline downstream of the heat pump compressor: in one case the gas is released in an open environment with an ignition near the release point (jet fire), in the other case the release happens within a confined environment. In both cases, the conditions in which it is possible to operate safely were determined.

ANALYSIS OF BATTERIES ACTIVE BALANCE SCHEMES EFFICIENCY

The paper reviews the existing circuit solutions of devices for balancing electric batteries. The balancing principle on the basis of capacitive and inductive buffer elements has been described. It was shown the features of their work and the basic calculations for each device type. For circuits with transformer topology, the calculated values for determining the balancing current are indicated. Based on the circuit solutions analysis, the efficiency of using solutions based on inductive buffer elements is numerically determined and proved. Powerful batteries for power supply systems are used in the form of stacks, consisting of a series-parallel connection of single cells. During their operation, there is a problem of uneven discharge or charge, to compensate which it is necessary to make voltage levels balancing in the stack batteries. For safely using electrochemical batteries the using of specialized balancing devices is required. The most efficient, from an energy point of view, are active balancing systems. The analysis of the mathematical model of two types (capacitive and inductive) buffer elements operation allowed to give a qualitative assessment of their efficiency. The first, in comparison with inductive - not only have worse energy characteristics, but also do not allow to perform "scaling" of the device without significant complication of the control system. The current amplitude value in circuits with a capacitive buffer element is limited only by the internal parasitic resistances of the circuit elements, therefore, with a relatively large value of imbalance, in circuit elements (including batteries) takes place a significant energy loss in the form of heat which negatively effects on rechargeable battery parameters. The current amplitude value in the circuit based on inductive buffer elements is limited by the inductance value. It can be calculated at the device design stage. In addition, providing the control system with intermittent converter operation allows to reduce switching losses in the circuit power switches and increases the overall operation efficiency. With a large number of batteries (more than three) should be preferred transformer balancing systems, as a special case of inductive topology.

Phytosociological Surveys and Monitoring of the Bromatological Parameters According to the Age of Regrowth of Savannah Pastures Perfectly Reconstituted in the Central Zone of Côte d'Ivoire

Although pastures in central (Affouvansou) Côte d'Ivoire are abundant, signs of undernutrition are observed in the animals towards the end of wintering, possibly due to insufficient quality pastures, poor grass quality, or poor herd distribution. Using the in-vivo digestibility method, bromatological monitoring of the fodder from these pastures was carried out according to the development age of the regrowth using Djallonke sheep. The objective is to help in the judicious use of these pastures. At regrowth age intervals between the 4th and 8th week, the nitrogen content in the grass decreases, the energy value increases at 6 weeks, and decreases slightly to remain at a correct value in the following weeks. Due to its nitrogen value, this pasture can be classified as a more or less poor quality savannah fodder. However, the savannah studied is of excellent quality from an energy point of view at 5 - 6 weeks of regrowth age. Depending on the nitrogen value, the forage can be said to be of average quality from the 5th to the 7th week. Beyond 8 weeks, the forage is of poor quality. The nitrogen content is therefore a limiting factor here. It cannot meet the maintenance needs of the UBT. It, makes sense to use the pastures in the center of the country between the 6th and 7th week of regrowth to get the most out of it.

Development and scientific justification a set of the high-speed road construction machines with hardware-percent integration and intellectual interactions algorithm of various technical systems

The description of complex technical systems with the implementation of hardware and software integration through the introduction of additional controls is presented. Recommendations for increasing the service life of the road surface and preventing premature repair of asphalt concrete surfaces are presented. A review of possible difficulties in implementing new technologies in road construction companies is performed. The project of modernization of new equipment is described, considering the research conducted in the field of finding alternative solutions to eliminate the “human” factor during road construction works. The interaction of the components of the complex for high-speed construction of asphalt concrete pavements is considered. The work of machines is described from the energy point of view, which is based on various interaction processes. The main components of the system structure and principles are considered. Multi-factor processes of road construction equipment operation are explained. The structure of algorithms for implementing an integrated machine management system is presented. The structure of hardware interaction through mathematical modeling to direct control of machine functionality in real time is described. Asphalt paving is represented by a multi-factor process, where one of the significant factors of the quality of the laid asphalt concrete is the road construction equipment used, which provides the required quality parameters of the road surface. The article describes a method for creating complex structural elements that allow creating artificial intelligence systems in the future.

INFLUENCE AND REGULATION OF INTERFACIAL ADHESION PROPERTIES OF A MAGNETIC SENSITIVE FILM/SUBSTRATE BY MAGNETIC FORCE AND FILM'S CURVATURE

The controllable interface adhesion of attachment and detachment has important application requirements in climbing devices, adhesion switches and mechanical grippers. In present paper, the influence mechanism of external magnetic field and film's initial curvature on the interfacial adhesion of a magnetic sensitive film/substrate is studied. The peel-test of the magnetic sensitive thin film with initial curvature on a substrate as well as the corresponding theoretical study are respectively carried out. Both the experimental and theoretical results indicate that the interfacial adhesion force of the magnetic sensitive thin film/substrate increases with increasing the initial curvature of the film, and the external magnetic field can enhance the interfacial adhesion force. Compared with the steady-state peel-off force of a flat thin film that is independent on the bending stiffness, the bending stiffness would decrease the steady-state peel-off force of the film with initial curvature. The interface effective adhesion energy is further considered from the energy point of view, which can disclose the comparing mechanisms of the film's bending energy, the potential energy of external magnetic field and the adhesion energy. Lastly, based on the experimental and theoretical results, a simply mechanical gripper controlled by both the magnetic field and film's initial curvature is proposed, which can continuously realize the gripping, transport and release of an object. The results obtained in the present paper can not only be helpful for understanding the interface reversible adhesion mechanism actuated by multi-field, but also provide a novel approach to design functional devices with controllable interface adhesion.

Performance assessment of a renewable micro-scale trigeneration system based on biomass steam cycle, wind turbine, photovoltaic field

Systems involving more than one energy source, namely hybrid systems, can be arranged in different configurations and layouts depending on the available or used energy source, application and scale of the system. Despite an increasing awareness and penetration of renewable energy sources at different scales in many countries over the world, the adoption of hybrid and novel renewable systems is relatively scarce, especially at a small scale. This scenario is also presented from the point of view of the research of such systems. Therefore, the scope of the paper is to improve the knowledge regarding small-scale hybrid renewable energy systems performance and operation by investigating a novel trigeneration system based on a biomass fired steam cycle, wind turbine, photovoltaic panels and adsorption chiller.In the proposed system, the thermal energy recovered by the steam cycle is used to match the user thermal demand by means of a storage tank supplying directly heat to the user during winter, and driving the adsorption unit during summer. The electrical energy produced by the steam turbine, photovoltaic field and wind turbine is managed by a control system that integrates a bidirectional connection with the electric grid. The grid allows one to virtually store the electrical energy produced in excess and to recover it in part when needed by the user. In order to assess the system performance, a farm and residential buildings are considered as case study.The proposed system is modelled and dynamically simulated by means of Transient System Simulation software. In the paper, the dynamic operation of the system and the energy and economic performance of the system is assessed. The operation of the system is presented in a daily and monthly basis, while the global performance parameters of the system are reported considering a one-year period. The primary energy saving of the system is above 70% when a reference system based on natural gas, electric chiller and grid is considered. For this scenario, the Simple Pay Back of about 10 years is achieved. The results of the analysis show that the system is feasible from the technical and energy point of view, whereas its economic profitability is significantly affected by its cost and the reference system that is adopted by the user.

Eco-Driving Control of Connected and Automated Hybrid Electric Vehicles on Multi-lane Roads Using Model Predictive Control

<div class="section abstract"><div class="htmlview paragraph">The core idea of advanced eco-driving is to optimize the vehicle’s speed and acceleration profile from the energy point of view using real-time data from the vehicle to vehicle (V2V) and vehicle to infrastructure (V2I). However, the main assumption of most of the existing advanced eco-driving approaches is that vehicles are maintained on a single-lane road that considers only the longitudinal motion of the vehicle. In multi-lane roads, controlling the lateral movement of the vehicle or the dynamic lane-changing along with the longitudinal movement can have a positive effect on traffic flow, travel time, fuel economy, and exhaust emission of the vehicle. This paper presents a bi-level model predictive control strategy for connected and automated hybrid electric vehicles (CAHEVs) to optimize inter-vehicle safety, energy-saving, and emission reduction while considering both the lateral and longitudinal motions of the vehicle. The proposed control strategy consists of two control levels: 1) the calculation and optimization of the power distribution between the internal combustion engine and an electric motor, which is referred to as the low-level control, and 2) the optimization of the vehicle speed profile, which is the high-level control. Both levels are used to control the longitudinal motion of the vehicle. Lateral motion or lane changing decision is controlled in another control layer based on the energy consumption prediction on each lane. The proposed control strategy is evaluated under different driving conditions in a realistic urban traffic simulation environment in SUMO. Simulation results show a 6.18 % reduction in the fuel economy while the state of charge of the battery maintained in the standard range and 5.94%, 5.01%, and 5.09% decrease in hydrocarbon (HC), carbon monoxide (CO), nitrogen oxides (NOx) respectively compared to the bi-level MPC-based controller without lane-changing approach.</div></div>

Energy performance of PVC-Coated polyester fabric as novel material for the building envelope: Model validation and a refurbishment case study

Tensile materials are concurrently becoming more and more utilized in contemporary architecture design, despite a lack of experimental testing and numerical model development to assess their actual effect on the building behavior, even more, if considered integrated in a second-skin system. In this research, the PVC-coated polyester fabric has been selected and tested as tensile second-skin material by using two outdoor comparative test cells to evaluate its performance and to calibrate and validate a numerical model in TRNSYS 18. Then, the validated numerical model has been used in a case study as a second layer in a flexible façade system. In particular, a simulation refurbishment of a typical three-story office building, located in southern Italy, has been investigated with the aim to evaluate its potential benefits from an energy point of view. The results showed that the refurbishment by means of a second-skin system always allows for an energy saving, up to a maximum of 6.1%; also, by exploiting the semi-transparency and the flexibility offered by this material to implement a continuous whole-façade design on the south wall, thus covering with the second-skin both the walls and the openings, the solar gains across the year can be modulated, by minimizing the gains during the summer and maximizing them during the winter, consequently leading to a reduction of the cooling and heating energy demands, for an overall heating energy demand reduction of about 9.8%.

Exploring the Potential of a Gamified Approach to Reduce Energy Use and Carbon Emissions in the Household Sector

This paper analyzes the impact of an innovative approach based on gamification to promote reduced energy consumption in social housing. The game was developed and validated under the auspices of the EU-funded project EnerGAware-Energy Game for Awareness of energy efficiency in social housing communities in an affordable housing pilot located in Plymouth (United Kingdom). The results showed that the future exploitation of the game holds important energy- and emissions-saving potential. Assuming that the game is distributed freely by European energy providers to their domestic end-users, the game was found to be able to save more than 48.9 secondary terawatt-hours per year (TWhs) and 18.8 million tons of CO2e annually, contributing up to around 8% to the target set for the European buildings sector to keep global warming under 2 °C. The results also showed that the game is highly feasible from the energy point of view, even when we consider the energy consumed upstream, due to its low cumulative energy demand and its potential for household energy reduction. The results of this research provide helpful information for private and public stakeholders, as they contribute to determining the sustainability of promoting energy saving through gaming.

Продуктивність поліпшених та культурних сіножатей і пасовищ в басейнах малих і середніх річок зони Лісостепу

Goal. To determine the efficiency of agricultural use of floodplains of rivers and adjacent areas for improved and cultivated hayfields and pastures as well as areas for improving the environmental situation in the context of climate change in the Forest-Steppe. Methods. Field, laboratory, statistical, energy and systems analysis. Results. Growing perennial grasses on drained peat soils provides both high land productivity and environmental protection. Yield at the application of phosphorus-potassium fertilizers (P45K120) on improved pastures is 7.13-7.41 t/ha of dry weight and 0.86-0.93 t/ha of crude protein; on cultivated pastures, respectively — 7.16-7.8 t/ha and 0.86-1.04 t/ha. On the background of N90R45K120 the productivity of improved and cultivated pastures increases respectively to 8.49-8.64 t/ha and 1.08-1.15 t/ha. Creating improved pastures also provides energy and resource savings. On cultivated hayfields in the conditions of climatic changes and with the use of modern varieties of cereal grasses productivity is high and makes on the background of P45K120 to 6,4-8,5 t/ha of forage units, and at the use of N90R45K120 — 8,1-10,4 t/ha accordingly. Application of nitrogen fertilizers on pastures and cultivated hayfields should begin from the 2nd year of grassland use. From the 2nd year of grassland use, the content of nutrients in the soil does not exceed the maximum allowable concentrations and confirms the great protective ability of meadow grasslands as a natural filter that protects the environment from pollution. The analogy is the effect of perennial grasses on the adjacent sloping lands. The approximate duration of the grazing period is 170-180 days, and of mowing conveyors — for 145 days. It is expedient to use such conveyors both from the economic and from the energy point of view. Conclusions. For the rational use of drained peat soils and adjacent slopes, taking into account economic, energy, and environmental feasibility, they should create improved and cultivated hayfields and pastures with a productivity of 7.13-11.5 t/ha of dry matter (at the use of P45K120), and 8.49-13.2 t/ha (at the use of complete mineral fertilizer). The duration of the grazing period is 185 days, and the green conveyor is 145 days. These lands are the natural filter that protects rivers from pollutants and combines their highly productive use with improving the environmental conditions of river basins.

Mechanical Processing of Hard Coal as a Source of Noise Pollution. Case Study in Poland

This article presents the results of noise tests, measurements and proposals of solutions that have an impact for reducing noise at one of the Jastrzębska Spółka Węglowa S.A. mines. All units and workstations at the mechanical coal processing plant were tested. Coal enrichment, aimed at adjusting its quality parameters to the requirements of various customers, is considered as a stage of mineral resources management. The adaptation of the quality of commercial coal products to the needs of specific customers consists in removing useless components from the excavated material. The processes of coal processing are carried out on various machines, the power of which reaches several dozen kilowatts. The energy of these machines, in addition to the useful power, is converted into heat, friction and noise. From the energy point of view, noise is not important, but it is very harmful to employees. The issue of noise pollution, although very dangerous to employees’ health, is often underestimated. Due to the subjective perception of noise, it is not possible to determine the risk without proper research. The aim of this study was to determine where the noise standards are exceeded. The next step was to propose specific solutions to reduce the impacts of noise on health and work comfort.

Score-based Bayesian belief network structure learning in damage risk modelling of mining areas building development

The article describes the results of using the application of Bayesian approach, to create a decision support system to evaluate the risk of the damages to prefabricated reinforced concrete (RC) buildings, that have been exposed to the impacts from the industrial environment of mines in the form of spatial subsidence and tremors. This problem is important from the point of view of both structural safety and utility aspects. It concerns many buildings, in which the damage is often caused by the excessive consumption of thermal energy used for heating interiors or dehumidifying damp walls. The above issues make the subject extremely important from a technical, socio-economical, and energy point of view, therefore it can be categorised as sustainable development problem. The Bayesian belief network (BBN) is used to build a risk model that encompasses all the issues and variables that describe the damage process associated with the entire scope.The use of BBNs is an innovative approach in this interdisciplinary area, that encompasses civil engineering and mining environmental protection. There are two types of score-based methods for learning the structure of a BBN from data which will be applied and compared. The first is an iterative method for searching the space of potential solutions, based on the Tabu-search algorithm. The second approach used a method of stochastic searching for a space of structures (node orders) based on the global optimisation algorithm Simulated Annealing (SA). The analyses were performed in R, using the catnet and bnlearn packages. The basis for the study was a database relating to 129 prefabricated reinforced concrete buildings with a wall bearing structure, located in a copper mining area in Poland. Finally, there were eight damage intensity indexes (wui) obtained from using the above models when analysing the risk of damage to structural and finishing elements. The most effective method turned out to be using the Tabu-search algorithm with the assumed K2 criterion. As a result, the following damage indexes were obtained – 91.43%–97.14% correctly classified patterns for the training set, while for the test set – 79.17%–100%. The conducted research is interdisciplinary in the field of civil engineering and mining and environmental engineering, and the very issue of damage is also important from the socio-economical and energy point of view, especially for a large number of buildings.

Ventilation of buildings with heat recovery systems: Thorough energy and exergy analysis for indoor thermal wellness

This work analyses deeply and critically the behavior of a heat recovery device of the ventilation system, in a dwelling of the Basque Country, under the energy and the exergy point of view. The aim is to show the different results that come from both perspectives. Heating period was monitored and data of the velocities and temperatures of the extracted and renovation airflows have been registered. With the data recorded, the effectiveness, energy efficiency and exergy efficiency of the recovery system have been calculated. Later, energy savings, primary energy savings and economic savings have been evaluated. Besides, the minimum difference between the outdoor and the indoor temperatures, from which the operation of the recovery system achieves a primary energy saving, an economic saving or an exergy saving were calculated. In addition to the exhaustive monitoring, the concentration of carbon dioxide in each room of the dwelling has been measured. The results obtained show the convenience of using ventilation systems with heat recovery from an energy point of view (with an energy efficiency of 89%), but not so if an exergy analysis is performed (with an exergy efficiency of 4%). After all, Second Law perspective penalizes a lot the electricity consumption for heating purposes, requiring a temperature differences (between the indoor and outdoor temperatures) higher than 32 °C in order to obtain exergy savings (not so under the energy perspective, where a difference of 1.6 °C is enough for having savings). The indoor air quality analysis confirms the adequacy in terms of CO2 concentration. This work is pioneer in terms of deep exergy application for ventilation systems.

Process Design to Obtain Copper Sulfate Crystals Using Solid–Liquid Equilibrium of Copper Sulfate–Sulfuric Acid–Seawater

In Chile, there are several mining companies that crystallize copper sulfate pentahydrate using freshwater; however, it would be interesting to know the effect of seawater in the process design of copper sulfate pentahydrate crystals, considering the low freshwater availability in the mining zones. In the present work, three different processes are proposed for obtaining copper sulfate pentahydrate crystals using seawater, by means of the addition of sulfuric acid. These were evaluated and compared in terms of their mass and energy balances. The first process (Case 1) is composed of crystallization, heating/mixing, recrystallization, centrifugation, and drying stages. In the second process (Case 2), the recirculation of the solution from the recrystallization to the crystallization stage is added. In the third process (Case 3), the heating/mixing and recrystallization stages are eliminated, considering one crystallization stage along with centrifugation and drying. The results of the Mass and Energy balances showed that there is high energy consumption associated with the heating/mixing and recrystallization stages, so the process that does not contain these stages (Case 3) is the most convenient from an energy point of view. On the other hand, the results indicated that the highest yield (97.17%) of the process is obtained when the recirculation of the solution is added from the recrystallization to the crystallization stages (Case 2), followed for the yield of 94.41% obtained in the process where the heating/mixing and recrystallization stages are eliminated (Case 3), which would make it the most convenient process from an energy and production point of view.

Design and Field Validation of a Low Power Wireless Sensor Node for Structural Health Monitoring

Smart monitoring systems are currently gaining more attention and are being employed in several technological areas. These devices are particularly appreciated in the structural field, where the collected data are used with purposes of real time alarm generation and remaining fatigue life estimation. Furthermore, monitoring systems allow one to take advantage of predictive maintenance logics that are nowadays essential tools for mechanical and civil structures. In this context, a smart wireless node has been designed and developed. The sensor node main tasks are to carry out accelerometric measurements, to process data on-board, and to send wirelessly synthetic information. A deep analysis of the design stage is carried out, both in terms of hardware and software development. A key role is played by energy harvesting integrated in the device, which represents a peculiar feature and it is thanks to this solution and to the adoption of low power components that the node is essentially autonomous from an energy point of view. Some prototypes have been assembled and tested in a laboratory in order to check the design features. Finally, a field test on a real structure under extreme weather conditions has been performed in order to assess the accuracy and reliability of the sensors.

Is the Anaerobic Digestion (AD) sustainable from the energy point of view?

This article aims to apply the Energy Sustainability Analysis (ESA) to the process of Anaerobic Digestion (AD), considering five different feedstocks: the organic fraction of municipal solid waste (OFMSW), agro-industrial products (energy crops) such as maize and sorghum silages, and agro-zootechnical wastes (slurry and manure) from cattle and pig livestock. The case study focuses on an AD bioreactor which is fed with a constant flow (50 ton/d) at a fixed total solids (TS) concentration (15% TS w/w). The processing chain is divided into three phases: pre-digestion operations, AD and the cogeneration of biogas, and post-digestion operations. The ESA methodology uses dedicated metrics and considers the entire technology chain from the energy resources up to useful energy. Energy crops present important energy footprints that must be spent for their production, while in the AD process, the pre-digestion and post-digestion phases present different energy costs for each analyzed feedstock. The results indicate that although the produced energy depends on the energy potential of the biomasses, the pre-digestion and post-digestion phase have an important weight in the overall energy sustainability of the system. In addition, in the case of the use of agro-zootechnical wastes and energy crops as feed, the availability of sufficient land to spread digestate on the field is essential to ensure the sustainability of AD technology, in its absence the energy sustainability can be critical as shown for the case of maize silage.

Energy efficiency of wind power plants in various wind condition

The present paper determines the optimum energy operation area of an electric wind power system, under time varying wind speed conditions. The determinations of the optimal area, from the energy point of view, is done based on experimental values from the Romanian black sea cost, Dobrogea area. The optimum operation area is defined by the optimal mechanical velocity, ωOPTIM. For this, the dependence between the wind speed, v, and ωOPTIM are computed based on the current wind speed and the current mechanical velocity ω. Due to the high inertia of the wind turbine (WT), the generators speed is not able to follow the changes of the wind speed. Knowing the optimum value ωOPTIM, the solution is to determine the load at the permanent magnet synchronous generator (PMSG) in order that the mechanical speed should timely reach his optimum.

Simultaneous energy and environment-based optimization and retrofit of TEG dehydration process: An industrial case study

Carbon dioxide emissions (CO2) during the dehydration process of natural gas are of important concerns as this gas negatively affects the climate and environment in general. Dehydration process also encounters many heating, cooling and pumping units, which leads to high energy consumption. Reducing these emissions along with minimizing the utilized energy while keeping the high production is a complex problem that can be solved by multi objective optimization (MOO). This study focuses on minimizing CO2 emissions, energy consumption (ENG) along with water content in the gas (WT). This means that the performance of the plant is improved from operational, environmental and energy point of view. The process is simulated with ProMax 4.0 and approved to be valid with the real plant data. Non-dominated sorting genetic algorithm (NSGA-II) was used for attaining the Pareto fronts for the decided MOO cases. The affecting decision variables and limitations are decided based on the capacity of the plant and industrial practice. Two bi-objective cases and a tri-objective case are considered, which are; minimizing CO2 emissions and WT (case 1), minimizing ENG and WT (case 2) and minimizing WT, ENG and CO2 emissions simultaneously (case 3). An attempt to retrofit the current process is also proposed and the cases are carried out with the modified process. Results showed noticeable improvements and enhancements in the given process.

Analysis of energy consumption during convective drying of fruits and berries

The work is dedicated to the calculation of energy costs for the realization of the process of convective drying of fruits and berries in a suspended layer. The energy consumption for the fan drive for organizing the air flow, providing the phenomenon of fluidization of fruits and berries, as well as the costs for supplying heat to the dehydration object have been calculated. The energy consumption was determined for various options of energy supply: using a heat pump and due to the operation of thermoelectric heaters (TEH). It is found that the largest proportion of the energy consumption for air circulation organization. It has been established that from the energy point of view, of all the investigated freons, the refrigerant R410 is the most efficient, the total energy consumption for dehydration of 1 kg of irgi berries with it is 7102 kJ, for honeysuckle - 9765 kJ / kg, for lingonberry - 7989 kJ / kg. Comparative analysis revealed that the use of a heat pump installation of convective drying fruits and berries in the fluidized bed reduces the power consumption by an average of 13% in comparison with drying by using heaters to heat the coolant.