A device for heating liquids
(57) Abstract:In the device for heating fluid inlet and outlet of the pump are connected by piping to form a closed recirculation loop. In the recirculation loop embedded heater. The supply and return pipes of the heat exchangers are connected through valves to a recirculation circuit. Expansion tank connected by a pipe to the inlet pipe of the pump. Heat is made in the form of a diffuser nozzle, giving a result of cavitation intensive vaporization. The ratio of the diameters of the living section of the outlet pipe of the pump to the pipeline supplying the coolant in the heat exchangers, equal to or greater than 2.5, the supply and return pipes connected respectively to the output and the input pipe of the pump. The use of the invention allows to simplify the design and to extend the scope of application of the device. 2 Il. The invention relates to heat engineering, in particular to a device for heating liquids, and can be used in heating systems of buildings and constructions, for heating water for industrial and domestic use.The nearest is the temperature of the coolant with an additional unit, associated control circuits with temperature sensor and drive the pump of flow.Significant disadvantages of the described system, the heat supply should include the complexity and lack of practical use of this system efficiency of electric power and scope of the system.Also raises doubts about the efficiency of the described system, because there is no compensator changes the physical state and liquid volume - expansion tank, the more that pumps the brand KM, which are referred to in the invention allow leakage of fluid up to 2 l/h and can work for pumping clean water with temperature up to 85oC.The technical problem of the invention is to eliminate these in the prototype shortcomings, simplifying the design and expansion of the application area.The task is due to the fact that the heat source is made in the form of a diffuser attachment that allows you to simplify the design of heat source and increase its thermal performance through the use of known in hydraulics phenomena of cavitation (see the book "Hydraulics, hydraulic machines and guide the military task is performed and due to the fact, that inlet and outlet of the pump are connected by piping to form a closed recirculation circuit, which is embedded in the heat source, and the supply and return pipes of the heat exchangers is connected through piping with shutoff valve to the recirculation circuit respectively to the output and the input pipe of the pump, the ratio of the diameters of the living section of the outlet of the pump of flow to the pipeline supplying the coolant in the heat exchangers, is equal to or more than 2.5.Increasing the efficiency of heating the liquid in the recirculation loop and the speed of its circulation in the heat exchanger contributes to depression in the shutoff of the pump, in the input socket.Saving the maximum value of head (pressure) of the fluid supplied to the heat exchangers, is achieved through the selection part of the heated fluid flow in the immediate vicinity of the outlet of the pump.To increase the reliability of the device serves as an expansion tank, which is connected to the recirculation loop in close proximity to the inlet pipe of the pump, providing compensation for changes in the volume and is a of Fig.2 in axial section shows the heat source.A device for heating liquids includes electric Assembly with pump 1, output 2 and input 3 boys of which are connected by pipes 4 and 5 through the diffuser nozzles (heat) 6, which contains a flanged top 7 (Fig.2) and the lower 8 (flanged and threaded elements, its cavity is made by a combination of the nozzle 9 and the diffuser 10, connected by a narrow section 11 and form a closed recirculation loop. The pipe 5 is attached to the tank 12 through pipe 13. The heat exchanger 14 through line 15 and 16 through valves 17 and 18 connected respectively to the pipes 4 and 5.The device operates as follows.When the pump 1, when closed, the valves 17 and 18, the liquid through the outlet 2 to line 4 enters the diffuser nozzles 6, where cavitation occurs changes its aggregate state and intensive vaporization (boiling), then through the pipe 5, the liquid enters the inlet pipe 3 of the pump 1. Thus, the recirculation of fluid in the closed circuit is an intensive heating of the liquid, the change aggregatedata through the surge tank 12, connected by pipes 13 and 5 with the suction inlet 3 of the pump 1.When open, the valves 17 and 18 of the flow of heated fluid under pressure developed by the pump 1, through the outlet 2 pipe 15 enters the heat exchangers 14 and then through the pipes 16 and 5 is returned to the inlet pipe 3 of the pump 1, while in the pipe 5 with intense stirring, cooled in the heat exchangers 14 and heated in a diffuser nozzle 6 fluid flows.The device has an automatic drive control and thermal regime, and thus the drive of the electric pump unit is controlled by temperature sensors through block feedback on the sketch Fig. 1 is not shown.In accordance with the invention was manufactured sample of the device for heating liquids on the basis of the centrifugal pump To 65-50-160. The device was tested in the mode space heating, consisting of three rooms with a total volume of 200 m3. The efficiency of the device was 97%, which was tested under various temperature regimes, and the water pressure in the heating system was not less than 3 ATM, in the zone of water intake was observed attenuated the t efficiency of use of electric energy Autonomous environmentally friendly heating systems and heating liquids for household and industrial needs. A device for heating liquids containing electric unit heater, heat exchangers, expansion tank, piping with shutoff valves and automatic control of electric and thermal regime, and the inlet and outlet of the pump are connected by piping to form a closed recirculation circuit, which is embedded in the heat generator, the supply and return pipes of the heat exchangers are connected through valves to a recirculation circuit, and an expansion chamber connected by a pipe to the inlet pipe of the pump, characterized in that the heat generator is made in the form of a diffuser nozzle, giving a result of cavitation intensive vaporization, the ratio of the diameters of the living section of the outlet pipe of the pump to the pipeline supplying the coolant in the heat exchangers, equal to or greater than 2.5, the supply and return pipes connected respectively to the output and the input pipe of the pump.
FIELD: power engineering.
SUBSTANCE: system has heat source - heat carrier heater, connected to vortex pipe, connected to heat consumer by feeding and backward pipeline of heat carrier. Into feeding pipeline of heat carrier pipeline of hot stream of heat carrier is connected, projecting from vortex pipe, and pipeline of cold flow of heat carrier outputted from vortex pipe is connected to suck-in branch pipe of heat carrier forcing pump, while cold flow of heat carrier passes through heat exchange device, into which heat carrier of outer source of low-potential heat is fed.
EFFECT: higher effectiveness.
1 cl, 1 dwg