Ostapenko O, Portnov V, Forsiuk P. STUDY OF VARIABLE OPERATION MODES ENERGY ECONOMIC EFFICIENCY OF ENERGY SUPPLY SYSTEMS WITH COGENERATION HEAT PUMP INSTALLATIONS, USING THE HEAT OF THE INDUSTRIAL AND NATURAL SOURCES. Works of VNTU [Internet]. 2018Jun.29 [cited 2024Nov.24];(2). Available from: https://works.vntu.edu.ua/index.php/works/article/view/537