SU1404759A1 - Method and automatic programmed regulator for controlling supply of heat to user of heating system - Google Patents

Description

(21) 4034488 / 29-06

(22) 03/10/86

(46) 06.23.88. B10L. № 23 (72) E.I. Tarasov and V.I.Krylov

(53) 658.284-533.65 (088.8)

(56) USSR Author's Certificate No. 1105736, cl. F 24 D 19/10, 1983.

Instruments regulating Р 25. Technical description and operating instructions, 1984, fig, 1,

(54) METHOD FOR REGULATING THE RELIEF OF HEAT TO THE SUBSCRIBER OF THE HEAT NETWORK AND AUTOMATIC PROGRAM REGULATOR FOR ITS IMPLEMENTATION

(57) The invention improves the quality of regulation. The graph of water t-ry in the return line 2 of subscriber 3 versus water t-ry in the direct line 5 of the heating network is maintained by the program regulator 18 in. the entire range of t-p heating network. Measure t-ru direct heat carrier (TH) thermal network, convert it into a signal according to the network

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It corresponds to the heating schedule and compares it with the actual temperature of the return subscriber. Maintaining the inverse TH t-ry is carried out by changing the direct TH th-ry subscriber ti in the direction of decreasing the difference of the indicated signals. The regulator 18 contains three thermal converters (TP). TP 1 is installed in line 2, and TP 4 and 14 are in series in line 5. Parallel to TP 4 and 14, a correction resistor is connected, and to bridge TP 4 and 14 poles of opposite polarity with respect to bridges TP 1 and setpoint adjuster t The power supply unit and the TP 4 and output stage are connected to a stabilized power supply. The invention allows for round-the-clock centralized programmed regulation of heat consumption by subscribers with ensuring the return of the return heat pump to the heating system with temperature strictly according to sufficiently ry schedule. 2 sec. f-ly, 2 ill.

AI ".1

The invention relates to heat engineering and can be used to regulate heat supply to subscribers of the heating network.

The purpose of the invention is to increase the quality of regulation.

Fig. 1 shows a functional scheme for regulating heat supply to a subscriber; FIG. 2 shows the functionality of the circuit of the corresponding program controller.

The automatic program regulator contains the first thermal converter 1 installed on the return line 2 subscriber 3, the second thermal converter 4 5 installed on the direct line 5 of the heating network, the setting device 6 of the adjustable temperature, the constant-voltage source 7 connected to the same poles the last bridges 8 and 9 of said first thermal converter 1 and sensor 6, bridge 10 of said second thermal converter 4 and output cad 11 connected to regulator 12 of line 13 of recirculating subscriber 3, the third thermal converter 14, which is additionally installed in the straight line 5 of the heating network, connected in series with the second thermal converter 4. In parallel with these two thermal converters 4 and 14, a correction resistor 15 is connected. Source 7 is connected to bridge 10 of the second and third thermal converters

4 and 14 poles of opposite polarity with respect to bridges 8 and 9. In addition, the regulator contains a DC amplifier 16 and an adjustment unit 17 for forming the law of regulation,

On the functional control circuit (Fig. 1), the program regulator 18, the circulating pump 19 and the flow regulator 20 are also indicated with pressure sensors 21 and 22, respectively in the supply and return lines 23 and 2 of subscriber 3. and by the regulator 24 on the direct line 5 of the heat network through the recirculation line 13.

Automatic software controller works as follows.

Signals from MOST 8 thermocouples 1 return line 2 subscriber 3 bridges 9 setters 6 and bridges 10 thermocouples 4 and 14 straight lines

5the heating networks are algebraically totalized and supplied to the input of the amplifier 16 direct current, from the output of which

the signal is fed to the input of the regulation forming unit 17, from the output of which the converted signal is fed to the input of the output stage 11, from the output of the latter the control signal is fed to the regulator 12 of the recirculation line 13. Bridges 8-10 are fed from a stabilized power supply 7, which is connected to bridges 8 and 9 with like poles, and to bridge 10 with opposite poles. The first thermal converter 1 of the return line 2 of the subscriber 3 is included in one of the arms of bridge 8. The bridge arm 9 includes the setpoint potentiometer b. The same bridge 10 includes in series the second and third thermal converters 4 and 14, installed in a straight line 5 of the heating network and shunted by a correction resistor 15.

In the steady-state mode, the signal at the input of the amplifier 16 is zero, therefore there is no signal to move the control box 12. In the case of increasing or decreasing the temperature of the water in the straight line 5 of the heat network, the thermal converters 4 and 14 change their resistance and an appropriate signal appears at the output of bridge 10. As a result, the control law, for example, proportional-integral, starts to cover, - or open, the regulator 12, which by means of the pump 19 changes the degree of water recirculation from the return line 2 of the subscriber 3 to the supply line 23 of the subscriber 3. As a result, it is understood or enhanced (depending on The temperature of the water in the return line 2 of subscriber 3 until the output of bridge 8, of which thermal converter 1 is installed in the return line 2 of subscriber 3, is equal to, but with the opposite sign of with respect to the signal from the output of bridge 0. In this case, the signal at the output of cascade 11 is absent and the regulator 12 does not move until a new signal appears, i.e. either the temperature of the direct heat carrier of the heating network is changed in line 5, or in the return line 2 subscriber 3, Thus, for every change in water temperature in the direct

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line 5 of the heating system or in the return line 2 of the subscriber; software controller 18 in accordance with a given program changes the temperature of the water in the return line 2 of subscriber 3 until it is equal to the temperature required by the heating network schedule.

The magnitude of the signal at the output of the bridge 10, in accordance with the heat-return curve, is formed by the series-connected thermal converters 4 and 14 and the correction resistor connected in parallel by it

The graph of the temperature of the water in the return line 2, subscriber 3, depending on the temperature of the water in the direct line 5 of the heating network, is maintained by the program regulator 18 over the entire temperature range of the heating network.

As thermal converters 1.4 and 14, standard thermal converters with a resistance of 53 Ω at 0 ° C can be used, the resistance value of the correction resistor 15 in this case is 102.63 Ω.

The pressure differential between supply 23 and return 2 lines of subscriber 3 (flow rate) is stabilized in the usual way using regulator 20 with pressure sensors 21 and 22 in supply 23 and return 2 lines of subscriber 3 and regulator 24 installed on line 5 of the heating system through line 13 of the recirculation.

If the regulator 12 can be completely opened on the recirculation line 13, for example, when the heating network does not lower the schedule for direct water, the pump 19 can be turned off by a limit switch (not shown) until the regulator 12 is completely opened.

The invention allows for round-the-clock centralized programmed regulation of heat consumption by subscribers with ensuring return of the return heat carrier to the heating network with the temperature strictly according to the heating schedule for the entire heating period.

Example. When measuring the temperature of the direct heat carrier of the heat network equal to 120 C, it converts it to

the signal corresponding to the temperature of the return coolant according to a heating schedule of 42 ° C is compared to the actual temperature signal

The subscriber’s return heat carrier is equal, for example, to 45 ° C, and the temperature of the subscriber’s direct heat transfer fluid is changed downwards until the subscriber’s return heat transfer temperature reaches 42 C.

With TeNmepaType, the return heat carrier of the subscriber is below the heating schedule for return water, for example, 39 ° C5, the temperature of the direct heat transfer medium of the subscriber is changed towards the subscriber until the temperature of the return heat carrier of the subscriber does not reach 42 C.

Claims (2)

1. The method of controlling the heat supply to the subscriber of the heat network by maintaining the temperature of the return heat carrier according to the heating schedule, which is such that, in order to improve the quality of control, the temperature of the direct heat carrier of the heat network is converted into a signal corresponding to the temperature profile return heat carrier according to the heating schedule, compare it with the actual temperature of the return heat carrier of the subscriber, and maintaining the temperature of the return heat carrier is carried out by changing the temperature tours of the subscriber’s direct heat carrier in the direction of decreasing the difference of the indicated signals. 2. Automatic programmed regulator of heat supply to the subscriber's heat40 A network containing the first thermal converter installed on the subscriber's return line, the second thermal converter. a generator installed on the direct line of the heat network, a variable temperature setting device, a DC power source, connected to the same poles of the last bridge, indicated by the first thermal converter and a control device, a bridge of the specified second thermal converter and an output stage connected to the control unit installed on the subscriber recirculation line, which is used for the purpose of increasing the quality of regulation, it additionally contains a third thermal converter connected to flax a second thermocouple, and a correction resistor pod50 55 Connected in parallel to the second and third converters, with the power supply connected to the bridge the last poles of the opposite polarity with respect to the other bridges. 2