KR101532635B1 - Temperature control system of a return water for district heating - Google Patents

Temperature control system of a return water for district heating Download PDF

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Publication number
KR101532635B1
KR101532635B1 KR1020130127562A KR20130127562A KR101532635B1 KR 101532635 B1 KR101532635 B1 KR 101532635B1 KR 1020130127562 A KR1020130127562 A KR 1020130127562A KR 20130127562 A KR20130127562 A KR 20130127562A KR 101532635 B1 KR101532635 B1 KR 101532635B1
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South Korea
Prior art keywords
temperature
unit
water
heating
limit value
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KR1020130127562A
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Korean (ko)
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KR20150047737A (en
Inventor
박근철
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현대디지탈시스템(주)
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/17—District heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]

Abstract

The present invention relates to a circulating water temperature control system for a district heating system, which prevents unnecessary circulation of heating water in a building in which a district heating system is applied, and can reduce an abnormal heating rate by outputting an alarm when the heating water is leaked due to a valve failure or the like.

Description

TECHNICAL FIELD [0001] The present invention relates to a temperature control system for a district heating system,

The present invention relates to a circulating water temperature control system for a local heating, and more particularly, to a circulating water heating system for preventing circulation of unnecessary heating water in an air-conditioned building to which district heating is applied and to reduce an abnormal heating rate by outputting an alarm upon discharge of water due to valve failure To a water temperature control system for district heating.

The district heating system is a system that supplies high-pressure steam or hot water to a large number of buildings scattered in a large area in a central heating machine room at one or several places, so that boilers and chimneys are not installed in each building. .

Such district heating is applied to a large number of apartment complexes, office buildings, and large buildings where large-scale heating is required. Heating pipes corresponding to the heat exchangers are buried in each unit space, and water for heating is supplied using a circulation pump Install a flow meter or calorimeter and charge a heating fee.

In addition, a thermostat is installed for each room to control the temperature of the room. The temperature of the room is measured and the heating water circulation valve is opened and closed. The heated air from the floor increases the temperature of the entire room When the room temperature reaches the set value, the heating is stopped.

In this case, until the room temperature is raised to the set value, the heating water continues to circulate in the heating pipe, and as the supplied heating water passes through the heating pipe, the temperature of the heating water gradually rises and eventually returns to a high temperature. .

In addition, due to the nature of district heating, high-temperature heating water is circulated in each area for a long period of time, so excessive heating charges are often added when the heating water circulation valve is continuously opened.

Basically, the heating rate is calculated by using the flow rate × flow rate × base rate when installing the flow meter, and the flow rate × calorie unit price × household base rate is applied when the calorimeter is used. As a result, since the heating charge is imposed according to the flow rate of use, local heating users are unreasonable to pay the same heating cost for the unused high temperature, and there is a problem that they are burdened when the hot water flows out due to the valve failure .

To solve this problem, a temperature controller is installed in each area of a new building, a control valve is installed in a hot water distributor, and each control valve is opened or closed. A bellows is installed at the inlet of each control valve. Closing is also used.

However, in order to apply these devices to existing buildings supplied with district heating, it is rarely practically applied because construction is required to replace parts of structures and systems and the cost is high.

Recently, calorimetry can be solved to some extent due to the use of calorimeter, but the calorimeter is more expensive than the flowmeter due to its complicated structure, and its replacement and maintenance cost is also much higher than that of the flowmeter. In addition, since the calorimeter has a built-in battery, it is troublesome in terms of management because it requires periodical replacement in order to implement a normal function. Even in the case where malfunctioning battery is removed and the function is disabled, good neighbors There was a problem that caused damage.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a high-temperature heating water supply system capable of sufficiently returning latent heat to a heat exchanger, And to provide a circulating water temperature control system for a local heating which can prevent the temperature change.

Another object of the present invention is to quickly detect the leakage of the heating water due to the failure of the heating water control valve and to recognize and take action by the user so that unexpected leakage of the heating water and the waste of the cost can be prevented, And to provide a water temperature control system.

In order to achieve the above object, the present invention provides a circulating water temperature control system for circulating heating water to a heating pipe embedded in a floor of a room, the system comprising: a first temperature measuring unit installed in a heating pipe for measuring a circulating water temperature; A second temperature measuring unit for measuring a temperature of the room in which the heating pipe is installed; A control valve installed in the heating pipe to control the flow of the water return; A controller for receiving the upper limit value and the lower limit value of the return temperature from the user and the target value for the room temperature when the temperature of the return water measured through the first temperature measuring unit reaches the upper limit value and closing the control valve, And a valve control unit for performing an operation of opening the control valve when the lower limit value is reached, so that the indoor temperature measured through the second temperature measurement unit reaches the target value; An alarm unit for outputting an alarm signal when the temperature of the circulating water measured through the first temperature measuring unit is out of a predetermined range to recognize the alarm signal; .

Here, the controller may include a determination unit that calculates a change in the room temperature measured through the second temperature measurement unit for a predetermined time and calculates an expected time at which the room temperature reaches the target value input to the setting unit, And a guide unit for outputting the calculation result to the user.

The controller transmits the information of the first temperature measuring unit and the second temperature measuring unit and the information inputted to the setting unit to the designated terminal and notifies the setting unit of the upper limit value and the lower limit value of the return temperature, And a communication module including a Bluetooth module configured to receive a target value for temperature.

The first temperature measuring unit may be detachably attached to the heating pipe and surround the outside of the heating pipe. The first temperature measuring unit may include a band unit having a radiating fin formed therein, and a heating unit for converting the sensed temperature into an electric signal, one end of which is in contact with the heating pipe, And an end of which is fixed to the band portion.

Since the present invention can be easily applied without changing the special equipments even in a spiral building where the district heating is applied, it is possible to drastically reduce the noise and the related costs due to the construction, and after the application, the heating water can flow only within the set range, Waste and excessive heating costs can be significantly reduced.

In addition, when the present invention is applied to an apartment complex, the change in the flow rate used in the household is proportional to the calorific value of the household, resulting in a charge for the calorific value of the household as a result, It is possible to prevent the application of heating fee.

In addition, since the circulation pump that supplies the heating water to each generation recently uses the inverter driving method, when the heating water flow amount of each household is reduced, the pressure is decreased and the power consumption of the circulation pump is also reduced. Effect can be expected.

In addition, the problem caused by the failure or leakage of the control valve can be quickly detected through the alarm device, thereby reducing the generation of the effluent and the cost wastage.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing a rough concept of the present invention,
2 is a block diagram illustrating a configuration and a connection relationship according to a preferred embodiment of the present invention.
3 is a perspective view illustrating an installation structure of a first temperature measuring unit according to a preferred embodiment of the present invention,
4 is a block diagram illustrating a configuration and a connection relationship according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of a circulating water temperature control system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing the concept of the present invention. In the present invention, heating water is circulated to a heating pipe embedded in a bottom portion of each unit space in a building partitioned by households, such as an apartment or an office building, It is applied where the district heating is applied.

A control valve 130 for controlling the circulation of the heating water is installed in the heating pipe to control the flow of the water. The controller 140 controls the indoor temperature and the heating state of the heating pipe, The control valve 130 is closed when the temperature of the return water is equal to or higher than the set value so that latent heat of the heated water can be released sufficiently into the space.

FIG. 2 is a block diagram illustrating a configuration and a connection relationship according to a preferred embodiment of the present invention. The present invention may include a first temperature measuring unit 110, a second temperature measuring unit 120, a control valve 130, A controller 140, and an alarm unit 150. [0034] FIG.

The first temperature measuring unit 110 is installed in a heating pipe and measures a temperature of the water. The temperature measuring unit 110 is composed of a thermocouple, such as an NTC thermistor, which converts a temperature into an electric signal.

In the preferred embodiment of the present invention, an NTC thermistor (Negative Temperature Coefficient of Resistance) can be used. The NTC thermistor is usually made of a mixture of two or more kinds of metal oxides such as Co, Mn, Ni, Cu and Fe at a use temperature of less than 300 ° C, CuO for improving the sinterability, F2O3 or Li2O for decreasing the resistance value, Cr2O is added to the sintered body and sintered at a high temperature of 1200 to 1400 ° C. The sintered body has a negative temperature coefficient of resistance.

In addition, the resistance temperature coefficient against temperature is high, so it is possible to miniaturize due to the simple structure and simple measurement with good temperature and precision, high reliability according to the non-contact type, low change with time, insensitivity to pressure, And excellent workability. Thus, there is a characteristic very suitable for the purpose of the present invention.

The water temperature measurement is usually installed in a hot water dispenser that is connected to the heating pipe and is exposed for work such as operation, maintenance, etc. under the sink, toilet, and utility room. Generally, the water return pipe is made of copper or polybutylene because of corrosion prevention, etc., and the hot water distributor is exposed to the air and the heat transfer and the divergence are quick because of the characteristics of the pipe.

The second temperature measuring unit 120 is a sensor for measuring the temperature of the room in which the heating pipe is installed, and is basically provided in an existing heating system capable of controlling the room temperature. If the building can not control the room temperature, it will be newly installed, but if there is a means to measure the room temperature, it can be used immediately.

The control valve 130 is a valve that is installed in a heating pipe and controls the flow of the return water, and is composed of a solenoid valve which is turned on / off by an electrical signal. In the case of a new building, if the control valve is already installed for heating operation control, it is used as it is.

The controller 140 receives power from the outside and controls the first temperature measuring unit 110 and the second temperature measuring unit 120 and the control valve 130 and the alarm unit 150. The controller 140 includes a setting unit 141 And a valve control unit 142, as shown in FIG.

The setting unit is configured to receive a target value for the room temperature including an upper limit value and a lower limit value of the water return temperature from a user, and may be a combination of a button and a rotary switch, or a touch pad.

The valve control unit 142 closes the control valve 130 when the temperature of the return water measured through the first temperature measurement unit 110 coincides with the upper limit value and when the temperature of the return water reaches the lower limit value, The operation of opening the valve is performed so that the room temperature measured through the second temperature measuring unit 120 reaches the target value.

That is, the user inputs the upper limit value and the lower limit value of the indoor temperature and the return temperature to a temperature suitable for the user in advance. First, the room temperature measured through the second temperature measuring unit 120 is inputted through the setting unit 141 The control valve 130 is closed and the latent heat of the heating water remaining in the heating pipe is sufficiently diverged to be heated. The control valve 130 is opened when the temperature of the return water gradually decreases to reach the lower limit value, so that the heating water circulates and the room temperature can be increased.

If the operation is repeated and the room temperature measured through the second temperature measuring unit 120 reaches the target value, the control valve 130 is not opened even if the temperature of the return water becomes the lower limit value, Prevents circulation of heating water.

The controller 140 may include a display unit 160 configured by an LCD panel or the like so that an upper limit value and a lower limit value input by the user through the setting unit 141 and an upper limit value and a lower limit value, which are measured through the first temperature measurement unit 110, The room temperature measured through the second temperature measuring unit 120, the ON / OFF state of the control valve 130, and the like.

The alarm unit 150 outputs an alarm signal to the user when the temperature of the circulating water measured through the first temperature measurement unit 110 is out of the set range. The alarm unit 150 may be a warning lamp And a speaker.

The predetermined range may be a range between the upper limit value and the lower limit value input through the setting unit 141. Since the reason for setting the alarm unit 150 is to prevent circulation of high temperature which is not desired, It may be set to be 1 to 2 degrees higher than the upper limit value.

In addition, if the temperature measured by the second temperature measuring unit 120 reaches a user-set temperature according to the user's need, the alarm unit 150 may be activated so that the user can recognize the temperature have.

At this time, since the control valve 130 is closed when the temperature of the return water reaches the upper limit value through the controller 140, the fact that the temperature of the return water is out of the set range, that is, It means that the control valve 130 does not operate normally or leakage of the return water occurs, which causes the user to be aware of this because the excessive heating cost is incurred.

At this time, the controller 140 controls the connection between the power unit (not shown), the first temperature measuring unit 110, the second temperature measuring unit 120, the control valve 130, and the alarm unit 150 It is preferable that the internal configuration of the setting unit 141 and the valve control unit 142 can be connected to each other through the connection terminal block to facilitate replacement and repair of the components.

The operation of the present invention according to the present invention is summarized as follows. When the heating water circulates through the heating pipe for indoor heating, the indoor temperature measured through the second temperature measuring unit 120 and the target temperature, If the room temperature does not reach the target value, the control unit 120 measures the temperature of the water via the first temperature measurement unit 110. If the temperature of the water is higher than the upper limit value, the control valve 130 is closed, Ensure that the latent heat of the water is sufficiently dissipated.

The temperature of the return pipe is gradually lowered. When the temperature of the circulating water measured through the first temperature measuring unit 110 reaches the lower limit inputted through the setting unit 141, the control valve 130 is opened The indoor temperature is increased by circulating the heating water. When the room temperature measured through the second temperature measuring unit 120 reaches the target value inputted through the setting unit 141, the control valve 130 is closed and the temperature on the water return side is higher than the upper limit value The control valve 130 is kept closed. When the indoor temperature is lower than the target value, the control valve 130 is opened and the heating water circulates when the temperature on the water return side is lower than the lower limit value. When the temperature on the water return side reaches the upper limit value, And is repeatedly performed until reaching.

If the temperature of the water is out of the set range during the operation, an alarm sounds through the alarm unit 150 to allow the user to recognize and solve the problem. Generally, the alarm is generated due to the problem of the control valve.

3 is a perspective view showing an installation structure of a first temperature measuring unit according to a preferred embodiment of the present invention.

As described above, the present invention allows the first temperature measuring unit 110 to be installed on the exposed hot water distributor so that it can be easily applied to an existing building to which the district heating is applied without any additional work.

3, the first temperature measuring unit 110 includes a temperature sensor 123 for converting a sensed temperature to an electric signal, and is detachably attachable to a heating pipe P. The heating pipe P through the band portion 121 formed with the radiating fins 122. The radiating fin 122 is provided on the side of the radiating fin 122, At this time, the heat radiating fins 122 prevent the temperature sensor 122 from sensing the temperature change of the heating water sensitively because the band portion 121 accumulates heat.

One end of the side body 123 is in contact with the heating pipe and the other end is fixed to the band portion 121. At this time, It is preferable to apply a material for improving the thermal conductivity such that smooth temperature measurement is performed.

FIG. 4 is a block diagram illustrating a configuration and a connection relationship according to another embodiment of the present invention. FIG. 4 is a block diagram illustrating a configuration of a wireless communication terminal according to another embodiment of the present invention. So that the temperature setting operation can be performed. To this end, the controller 140 further includes a determination unit 143, a guide unit 144, and a communication unit 145.

The determining unit 143 calculates a change in the room temperature measured through the second temperature measuring unit 120 for a predetermined time and calculates an estimated time at which the room temperature reaches the target value input to the setting unit 141 .

That is, the control valve 130 is opened / closed through the upper limit value and the lower limit value of the return water temperature inputted through the setting unit 141, so that the estimated time until the current room temperature reaches the target value is calculated. (The time from when the control operation is started until the upper limit value and the lower limit value of the normal water temperature are inputted to the present time), and the room temperature rise time is predicted.

The guide unit 144 may be configured as an LCD display panel to output the calculation result of the determination unit 143 to a user and may be integrated with the display unit 160 when the display unit 160 is provided.

The user can check the calculation result through the guide unit 144 and roughly predict the time at which the room temperature set by the user reaches the target value and adjust the upper limit value and the lower limit value of the return water temperature through the setting unit 141 It is possible to check the change in the time at which the room temperature reaches the target value, and appropriately adjust it, so that the optimal heating can be performed.

The communication unit 145 receives the temperature information measured from the first temperature measurement unit 110 and the second temperature measurement unit 120 and the upper and lower limit information of the target value and the return temperature inputted to the setting unit 141 And a Bluetooth module for sending the set value to the setting unit 141 through the designated terminal 200 so as to receive the upper limit value and the lower limit value of the return temperature and the target value for the room temperature.

The designated terminal 200 refers to a personal terminal in which a Bluetooth communication function such as a smart phone is basically installed, and a user can access the designated terminal 200 within a range where wireless communication is performed, The upper limit value and the lower limit value of the current control situation and the return temperature, and the target value for the room temperature can be input through the control unit.

Also, an alarm signal output through the alarm unit 150 may be confirmed through the designated terminal.

As described above, the leakage of the heating water, which may occur in the control valve 130, is caused by various causes such as wear of the packing, inserting foreign matter, failure in tightening the control valve driving unit, malfunction of the control valve, and the like. If the temperature rise of the circulating water can be easily recognized due to a large number of leaks, the alarm 150 can be easily recognized. However, if the temperature rise of the circulating water is not detected due to a small amount of leaking heat, The following is practically impossible.

To this end, in another embodiment of the present invention, the flow rate measuring unit 170 is installed in the heating pipe after the control valve 130 so that even a small amount of leakage can be detected.

The flow rate measuring unit 170 is a flow rate meter for measuring the flow rate of the fluid flowing in the pipe. The flow rate measuring unit 170 outputs a closing signal of the control valve 130 from the valve control unit 142, When the on-off-on or off-on-off signal is detected, it is determined that the control valve 130 has leaked the hot water, and the user can recognize the leakage through the alarm unit 150.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

110: first temperature measuring unit 120: second temperature measuring unit
121: band portion 122: heat sink fin
123: side body 130: control valve
140: Controller 141: Setting section
142: Valve control section 143:
144: guide unit 145: communication unit
150: alarm unit 160: display unit
170: Flow rate detector 200:
P: Heating piping

Claims (4)

A circulating water temperature control system for circulating heating water to a heating pipe embedded in a floor of a room,
A first temperature measuring unit 110 installed in the heating pipe to measure the temperature of the water;
A second temperature measuring unit 120 for measuring the temperature of the room in which the heating pipe is installed;
A control valve (130) installed in the heating pipe for controlling the flow of the water return;
A setting unit 141 for receiving an upper limit value and a lower limit value of the water temperature from the user and a target value for the room temperature, and a control unit 140 for controlling the control unit 140, when the temperature of the return water measured through the first temperature measurement unit 110 coincides with the upper limit value, The operation of closing the valve 130 and opening the control valve 130 when the temperature of the water return coincides with the lower limit value is performed such that the room temperature measured through the second temperature measurement unit 120 reaches the target value A controller (140) having a valve control unit (142)
An alarm unit 150 for outputting an alarm signal when the temperature of the circulating water measured through the first temperature measuring unit 110 is out of the set range and recognizing the alarm signal to the user; Lt; / RTI >
The first temperature measuring unit 110 includes a band 121 that is detachably attached to the heating pipe P and surrounds the outside of the heating pipe P,
And a sidewall body (123) for converting the sensed temperature to an electrical signal, one end of which is in contact with the heating pipe and the other end of which is fixed to the band part (121).
The method according to claim 1,
The controller 140 calculates a change in the room temperature measured through the second temperature measuring unit 120 for a predetermined time and calculates an estimated time at which the room temperature reaches the target value input to the setting unit 141 And a guidance unit (144) for outputting the calculation result of the determination unit (143) to a user.
3. The method of claim 2,
The controller 140 transmits the information of the first temperature measuring unit 110 and the second temperature measuring unit 120 and the information input to the setting unit 141 to the designated terminal 200, And a communication module (145) configured to receive an upper limit value and a lower limit value of the return temperature from the control unit (200) and a target value for the room temperature from the setting unit (141) Control system.
delete
KR1020130127562A 2013-10-25 2013-10-25 Temperature control system of a return water for district heating KR101532635B1 (en)

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Cited By (2)

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KR101774570B1 (en) * 2015-12-30 2017-09-04 (주)에이피 Flow control method for cold and hot water in cooling and heating system with fan coil unit
KR101899400B1 (en) 2016-12-23 2018-09-17 주식회사 경동나비엔 Heating apparatus interlocked with hot water matt, Hot water matt interlocked with heating apparatus, and the method thereof

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KR101672831B1 (en) 2015-08-25 2016-11-04 주식회사 구성이엔드씨 Control system and control method for heating using circulation water temperature
CN106958925B (en) * 2017-05-05 2023-10-03 南京常格科技发展有限公司 Soil heat exchange area heat balance monitoring alarm control system
KR102010710B1 (en) * 2018-12-31 2019-08-13 대성히트에너시스 주식회사 Charging method of Group living facilities for sharing heatpump
CN109974075B (en) * 2019-01-15 2021-02-02 南京华曜节能科技有限公司 Safe and reliable heating equipment
CN112178756B (en) * 2020-09-29 2021-08-31 华能国际电力股份有限公司日照电厂 Intelligent heat supply management system and working method thereof

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KR20070019823A (en) * 2005-08-11 2007-02-15 주식회사 애강 System for controlling temperature of the interior and the floor of an underfloor-heating room simultaneously
KR20090013960A (en) * 2007-08-03 2009-02-06 곽동연 The heating system for saving energy
KR20120006823A (en) * 2010-07-13 2012-01-19 주식회사 한 에너지 시스템 A revising control method of heating time in proportion to change rate of indoor temperature

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101774570B1 (en) * 2015-12-30 2017-09-04 (주)에이피 Flow control method for cold and hot water in cooling and heating system with fan coil unit
KR101899400B1 (en) 2016-12-23 2018-09-17 주식회사 경동나비엔 Heating apparatus interlocked with hot water matt, Hot water matt interlocked with heating apparatus, and the method thereof

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