TY JOUR TI ASSESSMENT OF ECONOMIC EFFICIENCY OF COASTAL AND SEA POWER UNITS FOR SATISFACTION OF CONSUMER NEEDS KW tidal power plant KW tidal energetics KW assessment of economic efficiency KW tidal power units JO Vestnik of Astrakhan State Technical University AU Olkhovik, E.. AU Butsanets, A.. PY 2016 IS 2016 PB Astrakhan State Technical University