The main task of energy analysis in the broad sense of the word is to study, quantify, optimize energy flows and manage them in agricultural systems and animal husbandry in order to create such farming methods that would ensure: the maximum use of biological means of production of natural resources, substances and energy to achieve a constant and sustainable increase in the productivity of agricultural production and animal husbandry; environmental protection from destruction and pollution, preservation of water, air and food quality within the limits safe for human health (that is, the creation of a favorable environmental environment).The article discusses the assessment of the efficiency of an installation for the preparation of liquid feed mixtures for various types of animals. A method of bioenergy efficiency as an efficiency factor is proposed.