energy efficiency

The paper presents the results of analysing the activities of a machine-building enterprise, taking into account the influence of factors of the political and socio-economic crisis. Based on the results of the PEST- and SWOT-analysis, the most promising directions of sustainable development of an engineering enterprise are identified, namely, implementation of energy-efficient solutions, use of circular economy principles, application of environmentally friendly technologies, digitalisation, and personnel training.

The paper investigates the dynamics of air flows in the cabin of a low-entry city bus to improve passenger comfort and energy efficiency. The modeling was performed by CFD analysis in Ansys Fluent using the Mercedes-Benz Citaro Hybrid cabin model. Under winter conditions (flow inlet temperature - 27°C, bus body walls - 0°C), the maximum flow velocity reached 3.69 m/s in the doorway area, while insufficient ventilation was found in the front and rear parts of the cabin (velocity <0.8 m/s).

The design and performance of vibration exciters strongly influences the operational efficiency and adaptability of industrial vibratory equipment. Vibratory equipment with such mechanisms is widely used in industries such as mining, construction, food processing, pharmaceuticals, and agriculture, where efficient material handling and precise motion control are critical. Traditional systems face several challenges, including energy inefficiency, limited trajectory control, and a need for more flexibility for diverse industrial applications.

The growing demand for electricity and the need for environmentally friendly energy sources are driving the active development of renewable technologies, with solar energy playing a leading role. Photovoltaic (PV) systems are capable of converting solar radiation into electrical energy; however, their efficiency depends on the ability to adapt to changing external conditions, such as solar irradiance and ambient temperature.

This article presents a comprehensive analysis of hybrid unmanned aerial vehicles (UAVs) equipped with ducted and asymmetric propellers. The results of experimental studies confirm the advantages of using these types of propellers regarding aerodynamic efficiency, energy efficiency, noise reduction, and improved maneuverability. The possibility of combining asymmetric propellers with ducted designs, as well as their impact on thrust, flight stability, and other flight characteristics of drones, is examined in detail.

The results of an analytical review of a large number of publications on the problem of improving the efficiency of thermoelectric generators (TEG) over the past decade are presented. An analysis of historical data on the thermodynamic justification of the efficiency of thermoelectric generators is presented.

In today’s environment, domestic enterprises are increasingly aware of the importance of transitioning to green energy. In this direction, organisations are considering emission standards, using energy-efficient technologies, considering environmental aspects of production, etc. Businesses that reduce their carbon footprint are generally more likely to attract investment. They are also more socially oriented and balanced in terms of sustainable development.

Сформульовано вимоги, обґрунтовано принципи побудови, розроблено узагальнену архітектуру інформаційно-аналітичної системи для оцінювання, прогнозування та управ- ління енергоефективністю економіки регіону, визначено основні функції компонентів.

The requirements have been formulated, principles of construction have been grounded, thegeneralized information-analytical system architecture for evaluation, forecasting and energy efficiency management of regional economy has been developed, the main functions of components have been defined.

Predicting a building’s energy consumption plays an important role as it can help assess its energy efficiency, identify and diagnose energy system faults, and reduce costs and improve climate impact. An analysis of current research in the field of ensuring the energy efficiency of buildings, in particular, their energy assessment, considering the types of models under consideration, was carried out.