METHOD OF LOW-TEMPERATURE HEAT UTILISATION AND DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: power engineering. ^ SUBSTANCE: method of low-temperature heat utilisation and device for its implementation allow for the usage of low-temperature heat sources to preheat water. Method of fluid heat utilisation implies increasing velocity of the heat transfer medium flow by an additional jet which is directed tangentially to the heat transfer medium channel or at an angle to the section plane of the heat transfer medium channel. Heat recovery unit comprises a heat transfer fluid channel with an inlet and outlet and a channel for the medium being heated with an inlet and outlet; the above channels are separated from each other by a heat-conductive wall; an inlet nozzle is set in the heat transfer fluid channel to increase the fluid velocity. The heat transfer medium channel is a metal pipe while the helix-shaped channel for the medium being heated is made up by the space between the pipes set one inside the other. ^ EFFECT: increasing heating capacity of the heat transfer medium by increasing its velocity and contact surface with the separating wall. ^ 7 cl, 2 dwg