CN108072088A - A kind of central heating secondary network electric heating pump peak regulation system - Google Patents
A kind of central heating secondary network electric heating pump peak regulation system Download PDFInfo
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- CN108072088A CN108072088A CN201611003386.7A CN201611003386A CN108072088A CN 108072088 A CN108072088 A CN 108072088A CN 201611003386 A CN201611003386 A CN 201611003386A CN 108072088 A CN108072088 A CN 108072088A
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- 238000005485 electric heating Methods 0.000 title claims abstract description 73
- 238000010438 heat treatment Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 143
- 230000001105 regulatory effect Effects 0.000 claims abstract description 39
- 230000008676 import Effects 0.000 claims abstract description 11
- 230000008092 positive effect Effects 0.000 abstract description 2
- 239000008400 supply water Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
A kind of central heating secondary network electric heating pump peak regulation system is including the confession of once net, water return pipeline, secondary network confession, water return pipeline, plate heat exchanger, improvements introduced：Electric heating pump regulating units are added in plate heat exchanger secondary network return water input end, interior circulating water pipe of the electric heating pump regulating units including shell-and-tube heat exchanger, electric heating pump, shell-and-tube heat exchanger and electric heating pump evaporator, the internal circulation pump on interior circulating water pipe, net side port of export of the tube side import connecting plate type heat exchanger of shell-and-tube heat exchanger, once net return pipe, electric heating pump condenser are serially connected on the return pipe of secondary network return water input end of plate heat exchanger for the tube side outlet connection of shell-and-tube heat exchanger.The positive effect of the present invention is：Can be in the case of once net water supply parameter constant, the rapid supply and return water temperature for improving secondary network meets the once different peak regulation demand of heat user off the net.The gradient for realizing the high, medium and low warm energy of first and second net utilizes.
Description
Technical field
The invention belongs to heating fields, and in particular to the secondary network peak regulation of thermal power cogeneration central heating system.
Background technology
Thermal power cogeneration central heating system, in first, latter stage of heating, since secondary network heat user heat demand is small, to once net
Not high with the supply water temperature requirement of secondary network, secondary network supplies, backwater temperature difference maintains 5 DEG C or so, can meet secondary network heat
The heat demand of user.And heating freeze-up, with secondary network heat user heat demand increase, it is necessary to improve the confession of secondary network
Coolant-temperature gage, and the confession of secondary network, backwater temperature difference maintain 10 DEG C or so, therefore, only greatly improve once net heat supply initial end
Supply water temperature, the peak regulation heat demand of secondary network heat user could be met.
Thermal power cogeneration central heating system, use improve once net supply water temperature for secondary network peak regulation mode, exist with
Lower problem.First, peak regulation in this way, due to once net supply water temperature 40 DEG C of -60 DEG C of left sides higher than secondary network return water temperature
The right side is supplied water using the higher once net of temperature and directly heats the relatively low secondary network return water of temperature, it is necessary to consume substantial amounts of once net
High-quality heat energy.Second is that this peak regulating method very flexible.In general, there are a heat exchange stations up to a hundred in the linchpin once netted.Access two
The each group heat user of secondary net with the hot period, all exist to the supply water temperature of secondary network and the supply backwater temperature difference of secondary network compared with
Only with the peak regulation method that net supply water temperature is secondary network is improved once, inevitably there is the phenomenon that low load with strong power in big difference.
The content of the invention
The object of the present invention is to provide a kind of central heating secondary network electric heating pump peak regulation systems, overcome existing central heating
System is secondary network peak regulation above shortcomings with once net supply water temperature is substantially improved.
The central heating secondary network electric heating pump peak regulation system of the present invention, including the once net feed pipe being arranged in heat exchange station
Road, once net water return pipeline, secondary network water supply pipe, secondary network water return pipeline, once the plate heat exchanger between net and secondary network,
Secondary network circulating pump, improvements introduced are：It adds and utilizes the electric heating pump peak regulation that once net return water heat heats up to secondary network return water
Unit, the electric heating pump regulating units include：Peak regulation heat exchanger, electric heating pump, connection peak regulation heat exchanger electric heating pump one side and electricity
Interior circulating water pipe, the internal circulation pump on interior circulating water pipe of evaporator with heat pump, wherein, peak regulation in electric heating pump regulating units
Outlet of the heat source water inlet of heat exchanger through water pipe or a connector connecting plate type net side of heat exchanger, the heat source water of peak regulation heat exchanger
Outlet connection once net return pipe, the water outlet of electric heating pump condenser is through water pipe or the secondary net side of connector connecting plate type heat exchanger
Return water import, the water inlet of electric heating pump condenser connect secondary network return pipe.
It is above the basic technical scheme of the present invention.
In the present invention, peak regulation heat exchanger selects shell-and-tube heat exchanger, and increases by one in the middle part of the shell side of shell-and-tube heat exchanger
Or the outlet of more than one shell side stage casing, the tube side import of shell-and-tube heat exchanger is through net side of water pipe or connector connecting plate type heat exchanger
Outlet, the tube side outlet connection once net return pipe of shell-and-tube heat exchanger, the outlet of shell side stage casing and shell side on shell-and-tube heat exchanger
The outlet connection water pipe of end is simultaneously pooled to more than one on logical electric flow control valve, shell side import, the dynamic flow-rate adjustment that is powered more
Valve outlet is connected water pipe between the outlet and inlet of electric heating pump evaporator and forms Xun Huan circulation canal, fills low temperature in circulation canal
Recirculated water is equipped with internal circulation pump on the water pipe in circulation canal.
Increase the outlet of a shell side stage casing in the middle part of the shell side of shell-and-tube heat exchanger in the present invention, the increased shell side stage casing of institute goes out
Mouth is connected water-supply-pipe with the outlet of shell side end and is pooled to electric three-way flow control valve, electric three-way flow-rate adjustment valve outlet
Through water pipe or connector connection electric heating pump evaporator water inlet.
The how through-flow adjustable valve dsm controller is adjusted, and the electric controller includes being mounted on the adjusting of more through-current capacities
The each entrance of valve and the temperature sensor of outlet connect the control module of temperature sensor and motor-driven valve.
The present invention the course of work be：First, once net high-temperature water is admitted to along once net water supply pipe in heat exchange station
Once net flow control valve water inlet, by once net Flux Valve Control device measure net side of plate heat exchanger into and out of
The mouth of a river and the temperature of secondary net side entery and delivery port adjust the aperture ratio of once net flow control valve with this, will once net high temperature
It after the optimal proportion to exchange heat with secondary network is arrived in water flow control, then is exported and flowed out by once net flow control valve, via connecting tube
Road enters a net side water inlet of plate heat exchanger, gives plate heat exchanger secondary net side the heat transfer of once net high-temperature water
Secondary network return water after being heated up by electric heating pump regulating units, thus once the temperature of net high-temperature water reduces, and becomes in once net
Warm water, and flowed out from a net side water outlet of plate heat exchanger, via connecting plate type heat exchanger and electric heating pump regulating units one
The pipeline of secondary net side water inlet is admitted to a net side water inlet of electric heating pump regulating units, by being arranged on electric heating pump peak regulation
Electric compressor workmanship inside unit by the medium temperature thermal energy that net side of electric heating pump regulating units absorbs, is transformed into electric heating pump tune
The high temperature heat of the secondary net side of peak unit is imported in secondary network return water, and the temperature of warm water reduces in thus once netting, and becomes once
Net water at low temperature, and flowed out from a net side water outlet of electric heating pump regulating units, it is sent into heat exchange station via once net water return pipeline
Outer once net return water main system, completes once net high-temperature water and a step of secondary network return water exchanges heat.
At the same time, pipeline Xun Huan is provided by the secondary network circulating pump being arranged on the secondary network water return pipeline in heat exchange station
Power, the higher secondary network of temperature is supplied water the heat user water inlet being sent into outside heat exchange station, after completing heat exchange with heat user,
Thus the secondary network for reducing temperature supplies water, then is flowed out via heat user water outlet, becomes secondary network return water, and along secondary network return water
Pipeline is sent into the secondary net side water inlet of the electric heating pump regulating units in heat exchange station, by being arranged on inside electric heating pump regulating units
Electric compressor workmanship, by the once net medium temperature hydro-thermal energy that net side of electric heating pump regulating units absorbs, be transformed into electric heating pump tune
The secondary net side high temperature heat of peak unit is imported in secondary network return water, and the secondary network after heating up inside electric heating pump regulating units returns
Water is flowed out via the secondary net side water outlet of electric heating pump regulating units, and is passed through secondary network water return pipeline and be sent into plate heat exchanger
Secondary net side water inlet, absorb net side of plate heat exchanger once net high-temperature water heat after, it is higher to become temperature
Secondary network supplies water, and is flowed out via the secondary net side water outlet of plate heat exchanger, then is sent into heat exchange station by secondary network water supply pipe
The water inlet of outer heat user, complete secondary network supply, a closed cycle of water return pipeline and once net via heat exchange station to
Heat user carries a process of thermal energy.
The positive effect of the present invention is：
1st, the heat of warm water is secondary network peak regulation in once being netted using the extraction of electric heating pump regulating units, changes and is only improved once
Net heat supply initial end supply water temperature could carry out secondary network traditional method of operation of peak regulation.This peak regulation method has response
Soon, the characteristics of start-stop is flexible, can be according to the actual demand of each heat user, can be fast in the case of once net water supply parameter constant
Speed improves the supply and return water temperature of secondary network, meets the once different peak regulation demand of secondary network heat user off the net；
2nd, with it is traditional use raising once net supply water temperature is the mode of secondary network peak regulation compared with, this peak regulation method passes through
The heat transfer temperature difference that net high temperature supplies water with secondary network return water is reduced once, secondary network return water is heated up first by electric heating pump regulating units
Afterwards, plate heat exchanger is entered back into exchange heat with once net high-temperature water, i.e., the heat of secondary network 60% by plate heat exchanger from one
It being exchanged in secondary net high-temperature water, the heat of secondary network 40% absorbs once net medium temperature hydro-thermal by electric heating pump regulating units to be supplemented,
By this peak regulation method, it can reduce by 40% or so once net high-quality heat energy consumption；
3rd, this peak regulation system realizes the gradient utilization of the high, medium and low warm energy of once net and secondary network.Once net high-temperature water with
Secondary network is by the secondary network return water direct heat transfer after the heating of electric heating pump regulating units, warm water and the evaporation of electric heating pump assembly in once netting
Device low-temperature circulating water direct heat-exchange, the height that electric heating pump train condenser is produced warm the secondary network return water relatively low with temperature and directly change
Heat；
4th, it is the peak regulation phase, preferential using electric heating pump regulating units due to low 10 DEG C or so of secondary network return water ratio secondary network supply water temperature
Heat secondary network return water.First, the secondary network higher compared to more preferential heating temperature supplies water, electric heating pump regulating units can be promoted
System energy efficiency；Second is that the secondary network higher compared to more preferential heating temperature supplies water, due to reducing the condensation of electric heating pump regulating units
Temperature, the fouling of inner condensing tube wall will be into declining to a great extent；
5th, since electric heating pump regulating units needs are connected on once net medium temperature water return pipeline, to the influence relation of once net resistance
To the hydraulic equilibrium of original central heating system, changed since the resistance ratios of the shell-and-tube heat exchanger built in electric heating pump regulating units are board-like
Hot device low more than 50%, therefore, reduces on once netting hydraulically balanced influence；
6th, the low-temperature heat quantity of required peak regulation is concentrated by once net heat supply initial end and supplemented, and also can fully excavate the low of heating plant
Grade heat source is more advantageous to carrying out environmental protection treatment to arbitrary way, and the method is for alleviating north city winter coal smoke type air
Pollution is of great significance.
Description of the drawings
Fig. 1 is the heating system structure schematic diagram for being related to the present invention.
In figure：1 is once net water supply pipe, 2 for once net water return pipeline, 3 be plate heat exchanger, 4 is electric heating pump peak regulation
Unit, 5 be once net water return pipeline, 6 be secondary network water supply pipe, 7 be heat user, 8 be secondary network water return pipeline, 9 be secondary
Net circulating pump.
Fig. 2 is electric heating pump regulating units structure diagram in the present invention.
In figure：4-1 is shell-and-tube heat exchanger, 4-2 is electric heating pump, 4-2-1 is electric heating pump evaporator, 4-2-2 is that electric heating pump is cold
Condenser, 4-3 are that circulating water pipe, 4-4 are electric heating pump regulating units internal circulation pump in electric heating pump regulating units.
Fig. 3 is the shell-and-tube heat exchanger structure diagram used in the present invention.
Wherein：4-1-1 is shell-and-tube heat exchanger housing, 4-1-2 is tube side tube channel group, 4-1-3 is shell side deflector, 4-1-
4 be tube side water inlet, 4-1-5 is tube side water outlet, 4-1-6 is shell side water inlet, 4-1-7 is shell side stage casing water outlet, 4-1-8
It is three-way flow regulating valve for shell side outlet water at tail end mouth, 4-1-9.
Fig. 4 is the how logical electric flow control valve electric controller block diagram used in the present invention.
Specific embodiment
Refering to Fig. 1, central heating secondary network electric heating pump peak regulation system of the invention, including：One be arranged in heat exchange station
Secondary net water supply pipe 1 and water return pipeline 2, secondary network water supply pipe 6 and water return pipeline 8, once board-like between net and secondary network is changed
Hot device 3, secondary network circulating pump 9.Improvements introduced is：It adds and utilizes the electric heating that once net return water heat heats up to secondary network return water
Pump regulating units 4.
Refering to Fig. 2, the electric heating pump regulating units 4 include shell-and-tube heat exchanger 4-1, electric heating pump 4-2, connection shell heat exchange
The interior circulating water pipe 4-3 of device and electric heating pump 4-2, injection in circulating water pipe low-temperature circulating water, on interior circulating water pipe
Internal circulation pump 4-4, wherein, the tube side import of shell-and-tube heat exchanger 4-1 is through water pipe connecting plate type heat exchanger in electric heating pump regulating units 4
A 3 net side port of export, the tube side outlet of shell-and-tube heat exchanger 4-1 connect once net water return pipeline 2, electric heating pump condenser 4-2-
Secondary network return water import of 2 water outlet through water pipe connecting plate type heat exchanger 3, the water inlet connection of electric heating pump condenser 4-2-2
Secondary network water return pipeline 8.
Refering to Fig. 3, increase shell side stage casing outlet 4-1- in the middle part of the shell side of the shell-and-tube heat exchanger 4-1 used in the present invention
7, increased shell side stage casing outlet 4-1-7 be connected water-supply-pipe with the outlet 4-1-8 of shell side end and be pooled to three-way flowrate tune
It saves on valve 4-1-9, the outlet connection electric heating pump evaporator 4-2-1 water inlets of three-way flow regulating valve 4-1-9.Tube side Tube Sheet of Heat Exchanger
Once net outlets of the journey import 4-1-4 through water pipe connecting plate type heat exchanger 3.The tube side outlet 4-1-5 connections of shell-and-tube heat exchanger 4-1
Once net water return pipeline 2.The shell side import 4-1-6 of shell-and-tube heat exchanger meets evaporator 4-2- in electric heating pump 4-2 through inner circulating tube 4-4
1 water outlet.It is exported in the stage casing of shell-and-tube heat exchanger 4-1 on 4-1-7 or its water-supply-pipe between three-way flow regulating valve 4-1-9
Set temperature sensor.Temperature is set on the outlet 4-1-8 of shell side end or its water pipe between three-way flow regulating valve 4-1-9
Spend sensor.Above-mentioned temperature sensor accesses control module.The control output of control module meets three-way flow regulating valve 4-1-9.
According to the constant temperature of the outlet of setting, adjustment shell-and-tube heat exchanger 4-1 shell sides stage casing goes out three-way flow regulating valve controller
Mouth 4-1-7 and end outlet 4-1-8 enters the flow proportional of flow control valve.
Claims (3)
1. a kind of central heating secondary network electric heating pump peak regulation system, including：It is arranged on once net water supply pipe in heat exchange station, one
Secondary net water return pipeline, secondary network water supply pipe, once secondary network water return pipeline, the plate heat exchanger between net and secondary network, secondary
Net circulating pump, it is characterized in that：It adds using the electric heating pump regulating units that once net return water heat heats up to secondary network return water, it is described
Electric heating pump regulating units include：Peak regulation heat exchanger, electric heating pump, connection peak regulation heat exchanger electric heating pump one side and electric heating pump evaporator
Interior circulating water pipe, the internal circulation pump on interior circulating water pipe, wherein, the heat of peak regulation heat exchanger in electric heating pump regulating units
Outlet of the source water inlet through water pipe or a connector connecting plate type net side of heat exchanger, the heat source water out connection one of peak regulation heat exchanger
Secondary net return pipe, return water import of the water outlet through water pipe or the secondary net side of connector connecting plate type heat exchanger of electric heating pump condenser,
The water inlet of electric heating pump condenser connects secondary network return pipe.
2. central heating secondary network electric heating pump peak regulation system according to claim 1, it is characterized in that：Peak regulation heat exchanger is selected
Shell-and-tube heat exchanger, and increase the outlet of one or more shell side stage casings in the middle part of the shell side of shell-and-tube heat exchanger, shell heat exchange
Outlet of the tube side import of device through water pipe or a connector connecting plate type net side of heat exchanger, the tube side outlet connection of shell-and-tube heat exchanger
Once net return pipe, the shell side stage casing outlet on shell-and-tube heat exchanger are connected water pipe with the outlet of shell side end and are pooled to more than one
On logical electric flow control valve, shell side import, mostly logical electric flow control valve outlet, the outlet and inlet with electric heating pump evaporator
Between connect water pipe and form inner cycle channel, fill low-temperature circulating water in circulation canal, be equipped on the water pipe in circulation canal in
Circulating pump.
3. central heating secondary network electric heating pump peak regulation system according to claim 2, it is characterized in that：The shell of shell-and-tube heat exchanger
Increase the outlet of a shell side stage casing in the middle part of journey, the increased shell side stage casing of institute, which is exported, to be connected water-supply-pipe with the outlet of shell side end and converge
Collect electric three-way flow control valve, electric three-way flow-rate adjustment valve outlet through water pipe or connector connect electric heating pump evaporator into
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003386.7A CN108072088B (en) | 2016-11-15 | 2016-11-15 | Peak regulating system of electric heating pump of central heating secondary network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003386.7A CN108072088B (en) | 2016-11-15 | 2016-11-15 | Peak regulating system of electric heating pump of central heating secondary network |
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| Publication Number | Publication Date |
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| CN108072088A true CN108072088A (en) | 2018-05-25 |
| CN108072088B CN108072088B (en) | 2024-05-14 |
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| CN201611003386.7A Active CN108072088B (en) | 2016-11-15 | 2016-11-15 | Peak regulating system of electric heating pump of central heating secondary network |
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| CN112577100A (en) * | 2020-11-26 | 2021-03-30 | 清华大学 | Heating compensation method and device and readable storage medium |
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| CN111765509B (en) * | 2020-07-01 | 2021-02-26 | 河北工业大学 | Distributed wind-solar complementary bidirectional energy supply station |
| CN112577100A (en) * | 2020-11-26 | 2021-03-30 | 清华大学 | Heating compensation method and device and readable storage medium |
| CN112577100B (en) * | 2020-11-26 | 2021-12-10 | 清华大学 | Heating compensation method and device and readable storage medium |
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