Energy efficiency in the Murmansk region includes the following: optimization of energy consumption through the use of renewable and alternative energy sources; reconstruction and modernization of power plants; the introduction of energy-saving materials and technologies; expansion of the use of renewable energy sources to ensure the energy independence of remote small settlements; the work of wind farms in the power system and for heating consumers; the participation of wind power plants in natural gas processing technologies.

The main directions of renewable energy sources (RES) development in the region are energy supply to remote areas, construction of industrial wind farms, and construction of boilers on local fuels. The development of technologies based on renewable sources will improve the quality of life and the environmental situation in the region.

Kislogubskaya tidal power plant (TPP) was built for the first time in the world hydroelectric practice by floating method (without jumpers). This method allows you to save up to 43% of capital costs in the construction of TPP and hydroelectric power plants. The operation of the station in the conditions of the Arctic coast showed that it is an environmentally friendly source of energy; it provides stable operation both in peak and in the base part of the load schedule of the power system; the reinforced concrete floating thin-walled structure has no damage; the problems of corrosion and biofouling have been solved. In 2006, a new orthogonal turbine with a capacity of 1.5 MW was installed at the Kislogubskaya TPP, within the framework of the Mezen TTP project, which was successfully tested and confirmed the design parameters. The total capacity of Kislogubskaya TPP is currently 1.7 MW. The unique domestic generator with variable speed of rotation allows increasing its efficiency by 5%.

The first wind farm in the Murmansk region with a capacity of 200 kW was installed in 2001 in a trial and demonstration mode, providing electricity to the hotel "Lights of Murmansk". In 2013, a wind turbine of 5 kW capacity began to work in the village of Molochnyi. In 2014, three wind turbines of 3 kW each began to produce electricity in the village of New Titovka. In 2016, wind turbines of 500 kW was put into operation in the city of Kola to provide a woodworking enterprise. Wind farm with the capacity of 4 kW was mounted in the locality of Lovozero [1]. By 2021, it is planned to put into operation a wind farm with an installed capacity of 201 MW. The construction of a wind farm in the Kola Peninsula (80 turbines of 2.5 MW) will allow more efficient use of hydroelectric power. However, the connection of wind power plants to distribution networks will require the solution of technical issues related to the problems of power quality for both the network and consumers: flicker, swing of reactive power, the appearance of higher harmonics, false operation of relay protection and the development of economic mechanisms for the sale of energy to consumers.

Until now, in a number of remote settlements of the Murmansk region, diesel-generator sets are used for power supply, the capabilities of which do not allow to ensure the reliability of power supply to consumers. The implementation of the project to improve the energy efficiency of the power supply system of remote settlements of the Tersky district through the construction of wind-solar-diesel power plants [2] allows to solve the problems relevant to the region.

In the Murmansk region two boilers on the wood are operated in the village of Kuropta and village Luven'ga. It is planned to build 3 multi-fuel boilers on peat / wood chips with a total installed capacity of 25 MW.

In order to improve the energy efficiency of the heating system of treatment facilities in the municipality of Monchegorsk, a heat pump unit with a capacity of 200 MW has been introduced, which uses the heat of treated domestic sewage to heat production facilities.

Murmansk region has significant hydropower resources. Small hydropower for such settlements, where the supply of electricity via power lines is economically unprofitable, is considered as an alternative source of energy that can significantly reduce the supply of diesel fuel.

To increase energy efficiency and generate energy from renewable energy sources in the Murmansk region it is necessary to solve the following tasks: analysis of decentralized energy supply systems and monitoring of renewable energy sources, the creation of a register of renewable energy sources with positive experience in the Arctic.

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1. Renewable energy sources in isolated settlements of the Russian Arctic / V. H. Berdin, A. O. Kokorin, M. Yulkin, M. A. Yulkin. - Moscow: World Wildlife Fund (WWF), 2017. - 80 p.

2. Kuznetsov M.M. Alternative energy sources for remote customers / O.V. Fedorov, M.M. Kuznetsov // Вiсник Вiнницького полiтехнiчного iнституту. - 2015. - № 6 (123). - P. 141-144.