ENERGY EFFICIENCY OF AN ABSORPTION-RESORPTION REFRIGERATION MACHINES INCLUDED TO THE TRIGENERATION SYSTEM OF SMALL ENERGY

A modern trigeneration system consists of a power generation unit, a system of heat regeneration, and an absorption refrigeration machine. In small energy, the trigeneration systems are used to supply energy for small villages and small industries (without connection to net). The trigeneration concept leads to an increase in the energy effectiveness of utilization of primary fuel as well as economic effectiveness of the industrial process where heat and cold are required. In the paper, the schematics of the small trigeneration system is developed for the farm industry (living accommodation, production structures, green houses, block of heat water supply, refrigeration rooms for chilling and storage of raw and finished agriculture products). The refrigeration capacity is generated using one-stage absorption-resorption water-ammonia refrigeration machine. The reasons to select this type of absorption machine are the following: (a) relative low pressure within components, and (b) low irreversibilities within heat exchange processes because of heat supply/reject at variable temperature. In the paper, the method for evaluation of energetic effectiveness of the absorption-resorption refrigeration machine has been developed and applied for the application of this machine to the trigeneration system.