TY JOUR TI Expected economic effect after installing variator for main engine cooling system pump KW marine converted engines KW energy efficiency KW cooling system KW mounted pumps KW pump variator JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Pokusaev, M.. AU Trifonov, A.. AU Ilyina, E.. PY 2020 IS PB Astrakhan State Technical University