Keyword: «energy efficiency»

The article presents data on the results obtained during the energy survey of street lighting systems of the branch of PAO «Roseti Yug» – «Rostovenergo» PO the SEC of the Salsky RES. The technical and economic comparisons of the installation of LED lamps instead of lamps with incandescent lamps and arc mercury lamps are given.

To date, there is a growing trend in the world for the introduction and use of heat pumping units in the heating and water supply system. In this regard, the calculation of the cycle of a heat pumping unit with various sources of low-potential heat is an important task in assessing the feasibility of introducing energy-efficient technologies into the energy supply systems of isolated territories of the Arctic and the North of Yakutia. The paper considers three sources of low-potential heat: soil, reservoir and air. Ozone-safe freon R134a was selected as the working fluid of the cycle. Calculations of the electric power transformation coef-ficient (COP) for three sources of low-potential heat have been carried out.

Modern multi-frequency signals and algorithms for receiving multi-frequency signals with orthogonal and non-orthogonal frequency compaction are analyzed. The algorithm of coherent reception of N-OFDM signals with orthogonal frequency compaction against the background of masking noise interference, optimal by the criterion of minimum a posteriori error probability per bit, is considered.

The article provides an analysis of measures to improve the energy efficiency of the building of the workshop for the repair of agricultural machinery. Of the nine events presented, five were rejected due to the high cost of equipment and metal consumption. The remaining four areas require further consideration. These measures include the use of energy-saving heating systems, regulation of the release of thermal energy in an individual heating point, the use of a decentralized heat supply system and the improvement of thermal protection of the building.