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In ventilation systems, ground heat exchangers are becoming more and more popular, which can be considered as a passive air-conditioning system. Two types of heat exchangers are used: with a membrane separating ventilation air from the ground and membrane-less. The air preparation system described below is designed to simulate the temperature change conditions corresponding to seasonal changes. It was proposed to use a heat transport system using Peltier modules. As a result, it was possible to reduce or increase ...

Braking using the eddy current induction phenomenon is used in traction systems, retarders supporting the truck braking system, but also in the testing of rotating machines to create artificial loads. In addition to the desired phenomenon of interaction between the magnetic field generated by the electromagnetic brake coils and the field created in the brake disc as a result of induced electromotive forces causing eddy currents, during the brake operation is generated heat that is the effect of the eddy currents t...

Co-operation of renewable energy sources (photovoltaic cells or micro-wind turbines) with 230V receivers, eg LED substitutions of traditional light sources, requires the conversion of low voltage direct current electricity to 230V AC. Various designs of DC/AC converters intended for island operation and synchronized with the power grid were tested. The Hioki 3196 energy quality analyzer was used for the study. The stand-alone systems are used in voltage converters of very simple solutions converting DC power to AC...

The progressing depletion of fossil fuels necessitates the search for renewable sources of energy around the world. The reconstruction of small hydroelectric power stations is an alternative solution for the sustainable generation of energy. The objective of this study was to reconstruct a small hydropower plant in its former location. The average water flow and annual water flow were calculated, and the results were used to design a water turbine with a gear unit and a generator. An Archimedean screw hydroturbine...

In the paper the conception of the system for intelligent monitoring and control of the energy flow in LED lighting point integrated with photovoltaic solar panels and wind microturbines is described. The system implements procedures for measuring electrical and non-electrical parameters (wind speed and direction, atmospheric pressure, temperature, humidity, critical stresses of the structure (strain gauges), wind turbine speed) as well as control algorithms to manage the consumption and storage of energy. In the ...

A technical design with an economic and energy analysis of transforming an existing water weir built in 1920 to create point-of-use water for the technological needs of a local sugar factory. Since the closure of the sugar factory, the weir has only served to stabilize the river bed. Conceptual discussions were carried out and a technical solution was proposed to convert the regulatory weir into an energy facility. Because of the small catchment area of 175.5 km2, the energy potential of this facility is low - wit...

The goal of article is to present an influence of V2G and G2V technology on electric power system. They were presented different ways of balancing the National Electric Power System by electric vehicles, which are taking part in V2G and G2V systems. By using technologies which support integration of electric vehicles with grid, a traditional grid can be developed and transformed to the Smart Grid. One of the systems that support electric vehicles is called Smart Metering. пїЅNegawattпїЅ is a theoretical unit, whic...