SU1495583A1 - Method of operating hot water supply system - Google Patents

Abstract

The purpose of the invention is to increase the efficiency of the system by maintaining the optimum hot water temperature. In the absence of water analysis, the temperature difference of the return mains water measured by sensors 3 and 4 will be minimal. In this case, the regulator maintains the calculated temperature of hot water, following the readings of sensor 12. When water consumption occurs, a difference in water temperature measured by sensors 3 and 4 occurs, and depending on the magnitude of this difference, regulator 5 lowers, against the calculated value, the temperature of hot water measured by sensor 12. When the preset threshold value of the temperature difference measured by sensors 3 and 4 increases, the controller 5 stops the pump through the starter 9. The value of lowering the temperature of hot water in the supply pipe 11 of the hot water supply system supported by regulator 5 is determined on the basis that the minimum temperature difference of the supply water in the first stage of the preheater corresponds to the minimum water flow and zero correction, the maximum temperature difference of the supply water on the first stage of the preheater corresponds to the maximum water consumption for water intake and the maximum calculated correction value, defined as the difference between the old and the new value of water temperature. 1 il.

Description

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The invention relates to district heating systems and can be used to control the heating of water for the needs of hot water for residential and administrative buildings.

The purpose of the invention is to increase the efficiency of the hot water supply system at the water trap by maintaining the optimum temperature of the hot water and excluding the circulation of water in the circulation loop of the system at the maximum trap.

The drawing shows a circuit for controlling a hot water system.

The circuit for controlling the hot water supply system comprises a return pipe 1 of the heat network, on which before and after the first stage heater 2, temperature sensors 3 and 4 are connected to the regulator 5 controlling the operation of the control valve 6 located on the flow pipe 7 the network in front of the heater 8 of the second stage, connected in series. The regulator 5 is connected with the actuator 9 of the circulation pump 10. On the pipeline 11 of the hot water supply after the preheater 8, a temperature sensor 12 is connected to the regulator 5.

The control method of the hot water system is as follows.

In the absence of a tap, the temperature difference of the return mains water measured by sensors 3 and 4 is minimal. In this case, the controller 5 maintains the calculated temperature of hot water, following the readings of sensor 12. If there is water consumption, a difference in the temperature of the return supply water, measured by sensors 3 and 4, occurs and, depending on the magnitude of this difference, the controller 5 lowers against the calculated one. the hot water temperature measured by the sensor 12. When the predetermined threshold value of the temperature difference measured by sensors 3 and 4 is exceeded, the regulator 5 through the starter 9 stops the pump 10. At a standstill,

The torus 5 through the starter 9 turns on the circulation pump 9.

The magnitude of the decrease in temperature of hot water in the supply pipe 11 of the hot water supply system supported by controller 5 is determined on the basis that the minimum temperature difference of the supply water in the first stage of the preheater corresponds to the minimum water flow and zero correction, m to the maximum temperature difference of the network water in the first stage of the heater corresponds to the maximum consumption of water for water extraction and the maximum calculated correction value, defined 5 as the difference between the old and new value of water temperature calculated by the formula

tnp tr-Qr.n / ZG-c, where tnp is the water temperature at the water supply

th crane, equal to 50 ° C; t is the temperature of hot water after

second stage, ° C; G - total water consumption in the system

hot water supply, kg / h; Qr.n - heat losses in pipelines

systems, kcal / h;

с - specific heat capacity of water, kcal / / kg- ° С.

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25

thirty

Claims (1)

Invention Formula The method of controlling the hot water supply system includes measuring the temperature of hot water at the outlet of the second stage of the hot water heater of a two-step sequential circuit with a hot water supply circuit and maintaining it at the required level by varying the flow of heating water that differs the fact that, in order to improve the efficiency of the system by maintaining optimal 40 temperature of hot water, measure the temperature of the return mains water before and after the first stage of the heater and, depending on the temperature difference, adjust the temperature of the hot water at the outlet of the pump 10, lowering the temperature of hot water, dB ROY of the heater stage, and when reaching the sensor 12 not produced by this difference of a given threshold With a decrease in water consumption and a decrease in value, the circulation of water in the the temperature difference of the inverse-circulating circuit of the hot dy, measured by sensors 3 and 4, regul-water supply. 0 The torus 5 through the starter 9 turns on the circulation pump 9. The magnitude of the decrease in temperature of hot water in the supply pipe 11 of the hot water supply system supported by controller 5 is determined on the basis that the minimum temperature difference of the supply water in the first stage of the preheater corresponds to the minimum water flow and zero correction, m to the maximum temperature difference of the network water in the first stage of the heater corresponds to the maximum consumption of water for water extraction and the maximum calculated correction value, defined 5 as the difference between the old and new value of water temperature calculated by the formula tnp tr-Qr.n / ZG-c, where tnp is the water temperature at the water supply th crane, equal to 50 ° C; t is the temperature of hot water after second stage, ° C; G - total water consumption in the system hot water supply, kg / h; Qr.n - heat losses in pipelines systems, kcal / h; с - specific heat capacity of water, kcal / / kg- ° С. 0 five thirty Invention Formula The method of controlling the hot water supply system includes measuring the temperature of hot water at the outlet of the second stage of the hot water heater of a two-step sequential circuit with a hot water supply circuit and maintaining it at the required level by varying the flow of heating water that differs the fact that, in order to improve the efficiency of the system by maintaining optimal 40 hot water temperature, measure the temperature of the return mains water before and after the first stage of the preheater and, depending on the temperature difference, adjust the temperature of the hot water at the outlet of the pre-heaters;