RU2096691C1 - Hot water preparation plant - Google Patents

Abstract

FIELD: industrial and domestic hot water supply systems. SUBSTANCE: plant includes electric pumping unit, jet-type heat generator, control panel, pipe lines with shut-off fittings and expansion tank. Besides that, it is additionally provided with cascade of jet-type heat generators connected in series: with water-jet elevator at inlet and with inter-tube space of heat exchanger at outlet; provision is made for partial extraction of heated water after each stage of cascade effected by waterjet elevator. Inter-tube space of heat exchanger is connected at inlet with outlet of preheated water cascade; outlet of inter-tube space of heat exchanger is connected with suction end of pump of electric pumping plant and expansion tank; tube space of heat exchanger is connected at inlet with cold water supply pipe line and with consumer line at outlet through regulating device. EFFECT: enhanced reliability. 2 cl, 1 dwg

Description

 The present invention relates to a power system and can be used in industrial and domestic hot water systems.

Known invention "Autonomous hot water system" [1]
The disadvantages of this invention is the complexity and bulkiness of the system, which requires a large area for placement and significant communication.

Also known is a hot water production unit for space heating, which contains an electric pump unit, a jet heat generator, a piping system, an expansion tank and a heated water control panel [2]
The specified installation can be used both for space heating and for producing hot water. We take it as a prototype.

 The disadvantage of this system is that it contains one electric pump unit and one heat generator of jet action, which is not able to highly efficiently convert the kinetic energy of a liquid jet into heat.

 The proposed installation for producing hot water increases the efficiency of converting the kinetic energy of a liquid jet into thermal energy due to the arrangement of a cascade of jet heat generators connected in series and a water-jet elevator providing a predetermined pressure drop after each stage of the cascade.

 The essence of the invention is as follows. The installation comprises an electric pump unit, a jet heat generator, an installation control panel, pipelines with shutoff valves, and an expander tank. In addition, it additionally contains a cascade of heat generators connected in series, having a partial selection of heated water after each stage of the cascade, carried out by a water-jet elevator. The water-jet elevator operates on the energy of a centrifugal pump jet, the suction of which is connected to the expansion tank, and the discharge is connected to the inlet of the water-jet elevator, which supplies partially heated water to the cascade again. This ensures a pressure differential at each stage of the cascade and heating of the water in a closed cycle to a predetermined temperature, and the water supplied to the consumer is heated in the heat exchanger. As regulators of water withdrawal from each stage of the cascade, inductors, taps and other regulatory means can be used.

 The invention is illustrated in the drawing, where: an electric pump unit 1, a control unit 2 of an electric pump unit 1, a suction pipe 3 of an electric pump 1, a discharge pipe 4 of an electric pump 1, a bypass pipe 5 with taps 6 and 7, a supply pipe 8 to the water-jet elevator 9, a crane 10 to injection of electric pump 1, cascade of jet heat generators 11, partial water withdrawal pipe 12 with regulators 13. Heated water pipe 14 into the annulus of the heat exchanger 15, pipe 16 at the outlet of the annulus heat exchanger 15. The pipe 17 to the expansion tank 18, the water level regulator 19 in the expansion tank 18, the heated water supply pipe 20, into the pipe space of the heat exchanger 15. The system feed pipe 21, the hot water pipe to the consumer 22 with a valve 23. Hot water temperature controller 24 , cable 25 from thermostat 24 to the control unit 2 of the electric pump unit 1.

 Installation for hot water works as follows.

 All taps are open except tap 24. The installation system is filled with water through the expansion tank 18 until the required level is established. After filling the system, close the taps 6 and 7 on the bypass pipe 5. Start up the electric pump unit 1 and pump water through the cascade of heat generators 11 and the annular space of the heat exchanger 15.

 We pump water until a stable operation of the electric pump unit 1 is established. Then we open the taps 6 and 7 on the bypass pipe 5 and thereby start up the water-jet elevator 9. Close the valve 10 and bring the water-jet elevator to stable operation 9. Then we adjust the pressure drop after each stage of the cascade 11 using the regulators 13.

 Thus, we bring the operation of the installation to the optimal mode. After that, we supply water, heated to a predetermined temperature using the temperature sensor 23, to the consumer, by opening the tap 24.

 The proposed installation for hot water has the following technical and economic advantages.

 1. Increases the efficiency of converting the kinetic energy of a liquid jet into thermal energy.

 2. Reduces the cost of capital investment.

 3. Allows selection of equipment for various needs of hot water supply with lower costs.

Claims (2)

 1. Installation for producing hot water, comprising an electric pump unit, a jet heat generator, an installation control panel, pipelines with valves, an expansion tank, characterized in that it further comprises a cascade of heat generators connected in series, connected at the inlet to the water-jet elevator, and at the outlet with the annular space of the heat exchanger, having a partial selection of heated water after each stage of the cascade, carried out by a water-jet elevator operating on jet energy an centrifugal pump, the suction of which is connected to the expansion tank, and injection with the supply of a water-jet elevator, which supplies partially heated water again to the cascade, thereby ensuring a pressure differential at each stage of the cascade, which is in a closed cycle to a predetermined temperature, and a heat exchanger, annular the space of which is connected at the entrance to the outlet from the cascade of heated water, and the exit from the annular space of the heat exchanger with the pump inlet of the electric pump installation and the expansion tank, and the pipe space GUT heat exchanger at the inlet to the cold water supply conduit, and the output to the network user via the adjusting means.  2. Installation according to claim 1, characterized in that as a regulator of water withdrawal from each stage of the cascade there may be inductors, taps and other regulatory means.