CN114427698B - Control system for intelligent combination and distribution of multiple energy sources - Google Patents

Control system for intelligent combination and distribution of multiple energy sources Download PDF

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Publication number
CN114427698B
CN114427698B CN202210233666.6A CN202210233666A CN114427698B CN 114427698 B CN114427698 B CN 114427698B CN 202210233666 A CN202210233666 A CN 202210233666A CN 114427698 B CN114427698 B CN 114427698B
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circulating
water
waterway
energy
water pump
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CN114427698A (en
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陈玲辉
李志刚
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Shanghai Quanyun Nuantong Technology Co ltd
ZHEJIANG GUANGTAO SANITATION KITCHEN CO Ltd
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Shanghai Quanyun Nuantong Technology Co ltd
ZHEJIANG GUANGTAO SANITATION KITCHEN CO Ltd
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    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1048—Counting of energy consumption
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1042—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses solar energy
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1045—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump and solar energy
    • 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
    • F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • 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
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/40—Geothermal heat-pumps

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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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

The invention belongs to the technical field of geothermal and constant-temperature circulating systems, in particular to a multi-energy intelligent combined and distributed control system which comprises a circulating waterway, a main energy waterway and an auxiliary energy waterway, wherein the control method comprises the following steps: A. starting a control system; D. detecting whether energy supplies heat or not; E. controlling heat exchange of the auxiliary energy waterway; F. controlling heat exchange of a main energy waterway; J. operating a circulating water pump; l, judging Qactual and Q setting: l1, when Qactual is less than Q, controlling heat exchange of the corresponding energy waterway, and returning to the step B; e2, when Qactual is more than or equal to Q, regulating the output power of the circulating water pump or returning to the step B; the invention can be applied to a heating system and a refrigerating system, adopts the main energy waterway and the auxiliary energy waterway to perform heat exchange together as a circulating waterway, reasonably controls the auxiliary energy waterway to perform heat exchange when the main energy waterway is insufficient in heat supply or cold supply, and further achieves the purpose of keeping the water temperature in the circulating waterway constant.

Description

Control system for intelligent combination and distribution of multiple energy sources
Technical field:
the invention belongs to the technical field of geothermal and constant-temperature circulating systems, and particularly relates to a control system for intelligent combination and distribution of multiple energy sources.
The background technology is as follows:
under the global energy command, low carbon emission is required, various green energy sources such as solar energy, hydrogen energy and the like are utilized, and the energy sources are independent and lack of an intelligent control system for combination according to emission level and economical principle.
In the northern floor heating system in China, low energy consumption sources such as central heating or solar heating mainly take hot water with the temperature not higher than 60 ℃ as heating media, and the hot water flows into a heating pipe in an indoor circulating waterway and circularly flows to heat floors, so that heat is supplied to the indoor in a radiation and convection heat transfer mode. Whether the low-energy consumption source supplies heat is determined according to the external temperature, namely, when the external temperature is greater than a specified threshold value, heat supply is stopped or insufficient, so that residents have temperature drops. In autumn, the outside temperature can float up and down at a specified threshold value, so that heat supply is frequently interrupted due to low energy consumption, the temperature in a circulating waterway is high and low, and discomfort of residents is caused by temperature drop, so that the life quality and comfort of the residents are seriously affected.
Meanwhile, in the south of China, when the summer is hot, a fresh air system or a constant temperature system is independently arranged in each household, and refrigeration is provided for the indoor by means of heat exchange flow of refrigerating fluid in a refrigerating machine in a circulating waterway; however, how to use clean and low-carbon energy such as solar energy as a preferential energy source, and to use commercial power as an auxiliary energy source when the refrigeration is insufficient. On the premise of ensuring the use requirement of users, how to economically use energy, and reduce carbon and emission as much as possible.
The invention comprises the following steps:
the invention aims to provide a multi-energy intelligent combined and distributed control system which can supply heat and refrigerate, performs heat exchange for a circulating water channel by means of a main energy water channel and an auxiliary energy water channel, and reasonably controls the auxiliary energy water channel to perform heat exchange when the main energy water channel is insufficient in heat supply or cold supply by detecting the water temperature in the circulating water channel and controlling the working state of a circulating water pump so as to enable the water temperature in the circulating water channel to achieve constant temperature.
The main energy and the auxiliary energy of the control system can be of a plurality of energy types, including municipal central heating, wall-mounted furnaces, solar energy, municipal electric energy, hydrogen energy and the like, when the control system needs high temperature and constant temperature, the central heating is adopted as the main energy, the wall-mounted furnaces are adopted as the auxiliary energy, and under the condition of insufficient central heating, the wall-mounted furnaces are adopted as the auxiliary energy to supplement heat; when the control system of the invention needs to perform low temperature constant temperature, namely, solar energy is used as a main energy source, the solar energy is converted into electric energy to drive the refrigerator, refrigeration is realized by virtue of the radiating fins arranged on the circulating water path, and municipal electric energy is used as an auxiliary energy source to further improve the refrigeration efficiency under the condition of insufficient solar energy refrigeration. Therefore, the control system of the invention combines a plurality of energy sources, thereby reasonably selecting different energy sources to respectively act on the main energy source and the auxiliary energy source according to the emission level and the economy of the energy sources so as to realize the constant temperature purpose of heating or refrigerating.
The invention is realized in the following way:
the utility model provides a control system that many energy intelligence allies oneself with, the distribution, including the circulation water route, and can carry out heat exchange's main energy water route and auxiliary energy water route with the circulation water route, be equipped with on the main energy water route and switch on or block main energy water route and the main energy switching-over valve that the circulation water route carries out heat exchange, be equipped with on the auxiliary energy water route and switch on or block auxiliary energy water route and the circulation water route and carry out heat exchange's auxiliary energy switching-over valve, be equipped with the circulating water pump on the circulation water route, the return water end department temperature of circulation water route is T1, the water temperature of the play water end department temperature of circulation water route is T2, the temperature after circulation water route and the heat exchange of main energy water route is T3, the temperature of main energy water route is T4, the temperature of auxiliary energy water route is T5, flow L in the circulation water route, control method includes following steps in proper order:
setting the rated backwater water temperature of the circulating waterway as T1, setting the rated water outlet water temperature of the circulating waterway as T2, setting the rated waiting time as T and the like, setting the rated stabilizing time as T steady, starting a control system and entering the next step;
step D, judging the sizes between T4 and T1 and between T5 and T3:
d1, when T4 is less than T1 and T5 is less than T3, displaying no-energy alarm by the system, and entering D1-1 in the step D;
d1-1, closing the circulating water pump, and re-entering the step D;
d2, when T4 > T1 or T5 > T3: entering the next step;
step E, independently judging the sizes of T5 and T3:
e1, when T5 is smaller than T3, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2, when T5 > T3, judging the size between T2 and T2:
e2-1, when T2 is more than T2, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2-2, when T2 is smaller than T2, controlling the auxiliary energy reversing valve to conduct heat exchange between the auxiliary energy waterway and the circulating waterway, and entering the next step;
step F, independently judging the sizes of T4 and T1:
f1, when T4 is more than T1, controlling the main energy reversing valve to conduct a main energy waterway to exchange heat with the circulating waterway, and entering the next step;
f2, when T4 is smaller than T1, controlling the main energy reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering the next step;
step J, the circulating water pump is a variable frequency pump, the circulating water pump is kept to run at the maximum output power PWM, and the next step is carried out;
step L, after the circulating water pump continuously runs t steadily, calculating the ratio between the actual power and the set power, namely Qactual: q setting= (T2-T1) ×l: (T2 is set to-T1 is set) L, and the Q actual and the Q set size are determined:
when Q is smaller than Q, the main energy reversing valve is controlled to be fully conducted, or the auxiliary energy reversing valve is controlled to be partially conducted, or the auxiliary energy reversing valve is controlled to be fully conducted, and the step D is restarted;
l2, when Qactual is more than or equal to Qset, regulating the output power PWM of the circulating water pump to reach actual required water flow until the actual power=set power, and returning to the step L again;
or (b)
Step J, the circulating water pump is not a variable frequency pump, the circulating water pump is kept to operate at normal power, and the next step is carried out;
step L, after the circulating water pump continuously runs t steadily, calculating the ratio between the actual power and the set power, namely Qactual: q setting= (T2-T1) ×l: (T2 is set to-T1 is set) L, and the Q actual and the Q set size are determined:
when Q is smaller than Q, the main energy reversing valve is controlled to be fully conducted, or the auxiliary energy reversing valve is controlled to be partially conducted, or the auxiliary energy reversing valve is controlled to be fully conducted, and the step D is restarted;
and L2, when Qactual is more than or equal to Qset, re-entering the step D.
In the control system for intelligent combination and distribution of multiple energy sources, the lowest water pressure of the circulating water channel is set to be P, the circulating water channel is supplemented with water through the water supplementing valve, and the rated water supplementing interval time is t;
the method comprises the following steps of:
step B, water is fed into the system in the circulating waterway, the actual water temperature in the circulating waterway is detected by means of a temperature sensor, and the actual water temperature is judged:
b1, when the actual water temperature is less than or equal to 0 ℃, the system displays low-temperature protection and enters a standby state or the circulating water pump is not powered, and the step B is restarted;
b2, when the actual water temperature is more than 0 ℃, entering the next step;
step C, detecting the actual water pressure in the circulating waterway by means of a pressure sensor, and judging whether the actual water pressure reaches the P amount or not:
c1, when the actual water pressure is more than or equal to P, entering the next step;
and C2, judging whether the last water supplementing interval time exceeds t supplement or not when the actual water pressure is smaller than the P amount:
c2-1, closing a water supplementing valve and giving out a water leakage alarm by the system when the water supplementing interval time is more than or equal to t;
c2-2, when the water supplementing interval time is less than t supplement, opening a water supplementing valve, and judging the size of L:
c2-2-1, when L=0, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2, when L is more than 0, after the water supplementing valve is kept open to supplement water and t is continued, detecting whether the actual water pressure in the circulating waterway is increased or not by means of the pressure sensor:
c2-2-2-1, if the water pressure is not increased, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2-2, if the water pressure increases, re-entering the step B.
In the control system for intelligent combination and distribution of multiple energy sources, the rated shutdown time of the circulating water pump is set as tsting, the rated return difference temperature is set as tspeed, the water pressure at the water outlet end of the circulating water channel is detected to be P outlet by means of the pressure sensor, the water pressure at the water return end of the circulating water channel is detected to be P return, and D1-1 in the step D also comprises the step that the circulating water pump starts to shutdown and time;
the method sequentially comprises the following steps of:
step G, judging whether the stop time of the circulating water pump exceeds t stop or not:
g1, when the stop time of the circulating water pump is more than t stop, entering the step I;
and G2, when the stop time of the circulating water pump is less than or equal to T, judging the size between the T1 and the T1:
g2-1, judging whether the auxiliary energy reversing valve is conducted to conduct heat exchange between the auxiliary energy waterway and the circulating waterway when T1 is more than or equal to T1:
g2-1-1, when the auxiliary energy reversing valve blocks the auxiliary energy waterway from exchanging heat with the circulating waterway, controlling the main reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering into D1-1 in the step D;
g2-1-2, when the auxiliary energy reversing valve conducts the auxiliary energy waterway to exchange heat with the circulating waterway, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from exchanging heat with the circulating waterway, closing an external room temperature switch, and entering the step F;
g2-2, when T1< T1 is set, judging the size between the T1 set-T difference and T1:
g2-2-1, when T1 is set to be the difference of T1 and is larger than T1, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G;
g2-2-2, when T1 is set to be less than or equal to T1, entering the next step;
step I, judging the size between the P output and the P return:
when the outlet P is not equal to the return P, the circulating water pump is turned off, and meanwhile, the circulating water pump starts to stop for timing, and the step G is restarted;
i2, if pout=pback, go to the next step.
In the above-mentioned control system for intelligent combination and distribution of multiple energy sources, the steps between the step G and the step I further include the following steps in order:
step H, detecting the working state of the circulating water pump:
h1, when the circulating water pump is in a starting state, judging the size of L:
h1-1, when l=0, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G;
h1-2, when L >0, entering step J;
and H2, when the circulating water pump is in a stop state, entering the next step.
In the control system for intelligent combination and distribution of multiple energy sources, the minimum protection flow of the circulating water pump is set to be Lmin,
the method comprises the following steps of:
step K, resetting the water pump stop time, and judging the size between L and Lmin:
k1, when L < Lmin:
k1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and giving out a flow smaller alarm by the system;
k1-2, if the flow is smaller than or equal to 30 times within 24 hours, the flow is smaller than or equal to n=n+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
k2, when L is more than or equal to Lmin, the flow is reduced for times N to zero, and the next step is carried out;
when the circulating water pump is a variable frequency pump, the step K should be performed before the step L2 is returned to the step L again.
In the control system for intelligent multi-energy combination and distribution, T1 is set to be 27-33 ℃, T2 is set to be 57-63 ℃, T and the like are 15-30s, and T is stable to be 15-30s.
In the intelligent multi-energy combination and distribution control system, the P amount is 0.8-1.5bar, and the t supplement is 24-72h.
In the control system for intelligent multi-energy combination and distribution, the t stop is 5-15min, and the T difference is 3-7 ℃.
In the multi-energy intelligent combined and distributed control system, the Lmin is 2.5-3.5L/min.
Compared with the prior art, the invention has the outstanding advantages that:
the invention can be applied to a heating system in the north and a refrigerating system in the south, adopts the main energy waterway and the auxiliary energy waterway to perform heat exchange together as a circulating waterway, and reasonably controls the auxiliary energy waterway to perform heat exchange when the main energy waterway is insufficient in heat supply or cold supply by detecting the water temperature in the circulating waterway and controlling the working state of the circulating water pump, thereby achieving the purpose of keeping the water temperature in the circulating waterway constant.
Description of the drawings:
fig. 1 is a logic diagram of a combination of embodiment one and embodiment two of the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to fig. 1 by way of specific examples:
embodiment one:
the embodiment is applied to a geothermal system, and the circulating waterway is a geothermal waterway.
The control system comprises a circulating water channel, a main energy water channel and an auxiliary energy water channel, wherein the main energy water channel and the auxiliary energy water channel can perform heat exchange with the circulating water channel, a main energy reversing valve which can conduct or block the heat exchange between the main energy water channel and the circulating water channel is arranged on the main energy water channel, an auxiliary energy reversing valve which can conduct or block the heat exchange between the auxiliary energy water channel and the circulating water channel is arranged on the auxiliary energy water channel, a circulating water pump is arranged on the circulating water channel, the water temperature at the water return end of the circulating water channel is T1, the water temperature at the water outlet end of the circulating water channel is T2, the water temperature after the heat exchange between the circulating water channel and the main energy water channel is T3, the water temperature of the main energy water channel is T4, the water temperature of the auxiliary energy water channel is T5, and the flow L in the circulating water channel; the main energy waterway and the auxiliary energy waterway are adopted together as the circulating waterway for heat exchange, and the auxiliary energy waterway is reasonably controlled to perform heat exchange when the main energy waterway is insufficient in heat supply by detecting the water temperature in the circulating waterway and controlling the working state of the circulating water pump, so that the purpose of keeping the water temperature in the circulating waterway constant is achieved.
The control method sequentially comprises the following steps:
setting the rated backwater water temperature of the circulating waterway as T1, setting the rated water outlet water temperature of the circulating waterway as T2, setting the rated waiting time as T and the like, setting the rated stabilizing time as T steady, starting a control system and entering the next step; wherein, T1 is set to 27-33 ℃, T2 is set to 57-63 ℃, T and the like are 15-30s, and T is stable to 15-30s. In this embodiment, T1 is set to 30℃and T2 is set to 60℃with T being 20s and T being stable to 20s.
Step B, water is fed into the system in the circulating waterway, the actual water temperature in the circulating waterway is detected by means of a temperature sensor, and the actual water temperature is judged:
b1, when the actual water temperature is less than or equal to 0 ℃, the system displays low-temperature protection and enters a standby state or the circulating water pump is not powered, and the step B is restarted; namely, the water heater has a low-temperature protection function, and in order to prevent the liquid in the circulating water channel from being frozen, an antifreezing agent is doped in the liquid in the circulating water channel; when the water temperature in the circulating waterway is at low temperature, the circulating water pump is not required to work continuously, and the low-temperature protection can be released after the external liquid enters the circulating waterway to raise the temperature.
B2, when the actual water temperature is more than 0 ℃, entering the next step;
in order to keep certain water pressure in the circulating water channel and detect that the circulating water channel is blocked or leaked, setting the lowest water pressure of the circulating water channel as P, and supplementing water to the circulating water channel through a water supplementing valve, wherein the rated water supplementing interval time is t; wherein the P amount is 0.8-1.5bar, and the t supplement is 24-72h.
Step C, detecting the actual water pressure in the circulating waterway by means of a pressure sensor, and judging whether the actual water pressure reaches the P amount or not:
c1, when the actual water pressure is more than or equal to P, entering the next step;
and C2, judging whether the last water supplementing interval time exceeds t supplement or not when the actual water pressure is smaller than the P amount:
c2-1, closing a water supplementing valve and giving out a water leakage alarm by the system when the water supplementing time is more than or equal to t;
c2-2, when the last water supplementing time is less than t, opening a water supplementing valve, and judging the size of L:
c2-2-1, when L=0, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2, when L is more than 0, after the water supplementing valve is kept open to supplement water and t is continued, detecting whether the actual water pressure in the circulating waterway is increased or not by means of the pressure sensor:
c2-2-2-1, if the water pressure is not increased, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2-2, if the water pressure is increased, re-entering the step B;
in order to avoid that the main energy waterway and the auxiliary energy waterway can not supply heat for the circulating waterway at the same time.
Step D, judging the sizes between T4 and T1 and between T5 and T3:
d1, when T4 is less than T1 and T5 is less than T3, displaying no-energy alarm by the system, and entering D1-1 in the step D;
d1-1, closing a circulating water pump, starting stopping the circulating water pump for timing, and re-entering the step D;
d2, when T4 > T1 or T5 > T3: entering the next step;
in order to judge whether the auxiliary energy waterway can supply heat to the circulating waterway.
Step E, independently judging the sizes of T5 and T3:
e1, when T5 is smaller than T3, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2, when T5 > T3, judging the size between T2 and T2:
namely, in order to judge whether the auxiliary energy waterway needs to supply heat for the circulating waterway.
E2-1, when T2 is more than T2, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2-2, when T2 is smaller than T2, controlling the auxiliary energy reversing valve to conduct heat exchange between the auxiliary energy waterway and the circulating waterway, and entering the next step;
correspondingly, in order to judge whether the main energy waterway can supply heat for the circulating waterway.
Step F, independently judging the sizes of T4 and T1:
f1, when T4 is more than T1, controlling the main energy reversing valve to conduct a main energy waterway to exchange heat with the circulating waterway, and entering the next step;
f2, when T4 is smaller than T1, controlling the main energy reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering the next step;
meanwhile, in order to prevent the water temperature in the circulating water channel from being too high or too low, the rated stop time of the circulating water pump is set as tsting, the rated return difference temperature is set as tspeed, the water pressure at the water outlet end of the circulating water channel is detected to be P outlet by means of a pressure sensor, the water pressure at the water return end of the circulating water channel is detected to be P return, wherein the tspeed is 5-15min, and the tspeed is 3-7 ℃.
Step G, judging whether the stop time of the circulating water pump exceeds t stop or not:
g1, when the stop time of the circulating water pump is more than t stop, entering the step I;
and G2, when the stop time of the circulating water pump is less than or equal to T, judging the size between the T1 and the T1:
g2-1, judging whether the auxiliary energy reversing valve is conducted to conduct heat exchange between the auxiliary energy waterway and the circulating waterway when T1 is more than or equal to T1: in order to avoid the overhigh water temperature in the circulating water channel, the auxiliary energy water channel or the heat exchange between the main energy water channel and the circulating water channel is selected to be closed so as to keep the water temperature in the circulating water channel to be in a constant temperature state.
G2-1-1, when the auxiliary energy reversing valve blocks the auxiliary energy waterway from exchanging heat with the circulating waterway, controlling the main reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering into D1-1 in the step D;
g2-1-2, when the auxiliary energy reversing valve conducts the auxiliary energy waterway to exchange heat with the circulating waterway, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from exchanging heat with the circulating waterway, closing an external room temperature switch, and entering the step F;
g2-2, when T1< T1 is set, judging the size between the T1 set-T difference and T1: in order to avoid the water temperature in the circulating water channel being too low, the circulating water channel can fully exchange heat with the main energy water channel or the auxiliary energy water channel by stopping the operation of the circulating water pump, so that the water temperature in the circulating water channel is kept in a constant temperature state.
G2-2-1, when T1 is set to be the difference of T1 and is larger than T1, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G;
g2-2-2, when T1 is set to be less than or equal to T1, entering the next step;
step H, detecting the working state of the circulating water pump:
h1, when the circulating water pump is in a starting state, judging the size of L:
h1-1, when l=0, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G; the circulating water pump is turned off to save energy waste.
H1-2, when L >0, entering step J;
h2, when the circulating water pump is in a stop state, entering the next step;
step I, judging the size between the P output and the P return:
when the outlet P is not equal to the return P, the circulating water pump is turned off, and meanwhile, the circulating water pump starts to stop for timing, and the step G is restarted; the circulating water pump is turned off to save energy waste.
If pout=pback, entering the next step;
step J, the circulating water pump is a variable frequency pump, the circulating water pump is kept to run at the maximum output power PWM, and the next step is carried out;
and setting the minimum protection flow of the circulating water pump to be Lmin, wherein the Lmin is 2.5-3.5L/min.
Step K, resetting the water pump stop time, and judging the size between L and Lmin:
k1, when L < Lmin:
k1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and giving out a flow smaller alarm by the system; namely, the problem of blockage in the circulating waterway is detected.
K1-2, if the flow is smaller than or equal to 30 times within 24 hours, the flow is smaller than or equal to n=n+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
k2, when L is more than or equal to Lmin, the flow is reduced for times N to zero, and the next step is carried out;
step L, after the circulating water pump continuously runs t steadily, calculating the ratio between the actual power and the set power, wherein the calculation of the power involves a fixed coefficient, and the ratio between the actual power and the set power is counteracted, namely Qactual: q setting= (T2-T1) ×l: (T2 is set to-T1 is set) L, and the Q actual and the Q set size are determined:
when Q is smaller than Q, the main energy reversing valve is controlled to be fully conducted, or the auxiliary energy reversing valve is controlled to be partially conducted, or the auxiliary energy reversing valve is controlled to be fully conducted, and the step D is restarted;
and L2, when the Qactual value is more than or equal to the Qset value, regulating the output power PWM of the circulating water pump to reach the actual required water flow until the actual power=set power, and returning to the step K again.
Embodiment two:
this embodiment is substantially the same as the first embodiment described above, with the main differences: the circulating water pump adopts the existing common water pump instead of the variable frequency pump; the control method comprises the following steps:
setting the rated backwater water temperature of the circulating waterway as T1, setting the rated effluent water temperature of the circulating waterway as T2, setting the rated waiting time as T and the like, setting the rated stabilization time as T steady, starting a control system and entering the next step;
step B, water is fed into the system in the circulating waterway, the actual water temperature in the circulating waterway is detected by means of a temperature sensor, and the actual water temperature is judged:
b1, when the actual water temperature is less than or equal to 0 ℃, the system displays low-temperature protection and enters a standby state or the circulating water pump is not powered, and the step B is restarted;
b2, when the actual water temperature is more than 0 ℃, entering the next step;
step C, detecting the actual water pressure in the circulating waterway by means of a pressure sensor, and judging whether the actual water pressure reaches the P amount or not:
c1, when the actual water pressure is more than or equal to P, entering the next step;
and C2, judging whether the last water supplementing interval time exceeds t supplement or not when the actual water pressure is smaller than the P amount:
c2-1, closing a water supplementing valve and giving out a water leakage alarm by the system when the water supplementing time is more than or equal to t;
c2-2, when the last water supplementing time is less than t, opening a water supplementing valve, and judging the size of L:
c2-2-1, when L=0, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2, when L is more than 0, after the water supplementing valve is kept open to supplement water and t is continued, detecting whether the actual water pressure in the circulating waterway is increased or not by means of the pressure sensor:
c2-2-2-1, if the water pressure is not increased, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2-2, if the water pressure is increased, re-entering the step B;
step D, judging the sizes between T4 and T1 and between T5 and T3:
d1, when T4 is less than T1 and T5 is less than T3, displaying no-energy alarm by the system, and entering D1-1 in the step D;
d1-1, closing the circulating water pump, and re-entering the step D;
d2, when T4 > T1 or T5 > T3: entering the next step;
step E, independently judging the sizes of T5 and T3:
e1, when T5 is smaller than T3, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2, when T5 > T3, judging the size between T2 and T2:
e2-1, when T2 is more than T2, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2-2, when T2 is smaller than T2, controlling the auxiliary energy reversing valve to conduct heat exchange between the auxiliary energy waterway and the circulating waterway, and entering the next step;
step F, independently judging the sizes of T4 and T1:
f1, when T4 is more than T1, controlling the main energy reversing valve to conduct a main energy waterway to exchange heat with the circulating waterway, and entering the next step;
f2, when T4 is smaller than T1, controlling the main energy reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering the next step;
step G, judging whether the stop time of the circulating water pump exceeds t stop or not:
g1, when the stop time of the circulating water pump is more than t stop, entering the step I;
and G2, when the stop time of the circulating water pump is less than or equal to T, judging the size between the T1 and the T1:
g2-1, judging whether the auxiliary energy reversing valve is conducted to conduct heat exchange between the auxiliary energy waterway and the circulating waterway when T1 is more than or equal to T1:
g2-1-1, when the auxiliary energy reversing valve blocks the auxiliary energy waterway from exchanging heat with the circulating waterway, controlling the main reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering into D1-1 in the step D;
g2-1-2, when the auxiliary energy reversing valve conducts the auxiliary energy waterway to exchange heat with the circulating waterway, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from exchanging heat with the circulating waterway, closing an external room temperature switch, and entering the step F;
g2-2, when T1< T1 is set, judging the size between the T1 set-T difference and T1:
g2-2-1, when T1 is set to be the difference of T1 and is larger than T1, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G;
g2-2-2, when T1 is set to be less than or equal to T1, entering the next step;
step H, detecting the working state of the circulating water pump:
h1, when the circulating water pump is in a starting state, judging the size of L:
h1-1, when l=0, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G;
h1-2, when L >0, entering step J;
h2, when the circulating water pump is in a stop state, entering the next step;
step I, judging the size between the P output and the P return:
when the outlet P is not equal to the return P, the circulating water pump is turned off, and meanwhile, the circulating water pump starts to stop for timing, and the step G is restarted;
if pout=pback, entering the next step;
step J, the circulating water pump is not a variable frequency pump, the circulating water pump is kept to operate at normal power, and the next step is carried out;
step K, resetting the water pump stop time, and judging the size between L and Lmin:
k1, when L < Lmin:
k1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and giving out a flow smaller alarm by the system;
k1-2, if the flow is smaller than or equal to 30 times within 24 hours, the flow is smaller than or equal to n=n+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
k2, when L is more than or equal to Lmin, the flow is reduced for times N to zero, and the next step is carried out;
step L, after the circulating water pump continuously runs t steadily, calculating the ratio between the actual power and the set power, namely Qactual: q setting= (T2-T1) ×l: (T2 is set to-T1 is set) L, and the Q actual and the Q set size are determined:
when Q is smaller than Q, the main energy reversing valve is controlled to be fully conducted, or the auxiliary energy reversing valve is controlled to be partially conducted, or the auxiliary energy reversing valve is controlled to be fully conducted, and the step D is restarted;
and L2, when Qactual is more than or equal to Qset, re-entering the step D.
The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, therefore: all equivalent changes in shape, structure and principle of the invention should be covered in the scope of protection of the invention.

Claims (9)

1. A control system for intelligent combination and distribution of multiple energy sources is characterized in that: the control method comprises the steps of setting a water return end water temperature of the circulating water channel as T1, a water outlet end water temperature of the circulating water channel as T2, a water temperature after heat exchange of the circulating water channel and the main energy water channel as T3, a water temperature of the main energy water channel as T4 and a water temperature of the auxiliary energy water channel as T5 on the main energy water channel, setting a flow L in the circulating water channel, and sequentially setting the water return end water temperature of the circulating water channel as T1, the water temperature of the circulating water channel as T4 and the water temperature of the auxiliary energy water channel as T5 on the auxiliary energy water channel:
setting the rated backwater water temperature of the circulating waterway as T1, setting the rated water outlet water temperature of the circulating waterway as T2, setting the rated waiting time as T and the like, setting the rated stabilizing time as T steady, starting a control system and entering the next step;
step D, judging the sizes between T4 and T1 and between T5 and T3:
d1, when T4 is less than T1 and T5 is less than T3, displaying no-energy alarm by the system, and entering D1-1 in the step D;
d1-1, closing the circulating water pump, and re-entering the step D;
d2, when T4 > T1 or T5 > T3: entering the next step;
step E, independently judging the sizes of T5 and T3:
e1, when T5 is smaller than T3, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2, when T5 > T3, judging the size between T2 and T2:
e2-1, when T2 is more than T2, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from heat exchange with the circulating waterway, closing an external room temperature switch, and entering the next step;
e2-2, when T2 is smaller than T2, controlling the auxiliary energy reversing valve to conduct heat exchange between the auxiliary energy waterway and the circulating waterway, and entering the next step;
step F, independently judging the sizes of T4 and T1:
f1, when T4 is more than T1, controlling the main energy reversing valve to conduct a main energy waterway to exchange heat with the circulating waterway, and entering the next step;
f2, when T4 is smaller than T1, controlling the main energy reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering the next step;
step J, the circulating water pump is a variable frequency pump, the circulating water pump is kept to run at the maximum output power PWM, and the next step is carried out;
step L, after the circulating water pump continuously runs t steadily, calculating the ratio between the actual power and the set power, namely Qactual: q setting= (T2-T1) ×l: (T2 is set to-T1 is set) L, and the Q actual and the Q set size are determined:
when Q is smaller than Q, the main energy reversing valve is controlled to be fully conducted, or the auxiliary energy reversing valve is controlled to be partially conducted, or the auxiliary energy reversing valve is controlled to be fully conducted, and the step D is restarted;
l2, when Qactual is more than or equal to Qset, regulating the output power PWM of the circulating water pump to reach actual required water flow until the actual power=set power, and returning to the step L again;
or (b)
Step J, the circulating water pump is not a variable frequency pump, the circulating water pump is kept to operate at normal power, and the next step is carried out;
step L, after the circulating water pump continuously runs t steadily, calculating the ratio between the actual power and the set power, namely Qactual: q setting= (T2-T1) ×l: (T2 is set to-T1 is set) L, and the Q actual and the Q set size are determined:
when Q is smaller than Q, the main energy reversing valve is controlled to be fully conducted, or the auxiliary energy reversing valve is controlled to be partially conducted, or the auxiliary energy reversing valve is controlled to be fully conducted, and the step D is restarted;
and L2, when Qactual is more than or equal to Qset, re-entering the step D.
2. The multi-energy intelligent combined and distributed control system according to claim 1, wherein the control system comprises the following components: setting the lowest water pressure of a circulating waterway as P, and supplementing water to the circulating waterway through a water supplementing valve, wherein the rated water supplementing interval time is t;
the method comprises the following steps of:
step B, water is fed into the system in the circulating waterway, the actual water temperature in the circulating waterway is detected by means of a temperature sensor, and the actual water temperature is judged:
b1, when the actual water temperature is less than or equal to 0 ℃, the system displays low-temperature protection and enters a standby state or the circulating water pump is not powered, and the step B is restarted;
b2, when the actual water temperature is more than 0 ℃, entering the next step;
step C, detecting the actual water pressure in the circulating waterway by means of a pressure sensor, and judging whether the actual water pressure reaches the P amount or not:
c1, when the actual water pressure is more than or equal to P, entering the next step;
and C2, judging whether the water supplementing interval time exceeds t supplement or not when the actual water pressure is smaller than the P amount:
c2-1, closing a water supplementing valve and giving out a water leakage alarm by the system when the water supplementing interval time is more than or equal to t;
c2-2, when the water supplementing interval time is less than t supplement, opening a water supplementing valve, and judging the size of L:
c2-2-1, when L=0, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2, when L is more than 0, after the water supplementing valve is kept open to supplement water and t is continued, detecting whether the actual water pressure in the circulating waterway is increased or not by means of the pressure sensor:
c2-2-2-1, if the water pressure is not increased, closing the water supplementing valve and giving out water leakage alarm by the system;
c2-2-2-2, if the water pressure increases, re-entering the step B.
3. The multi-energy intelligent combined and distributed control system according to claim 1, wherein the control system comprises the following components: setting rated shutdown time of the circulating water pump as tsting, setting rated return difference temperature as tspeed, detecting water pressure at the water outlet end of the circulating water channel as P outlet and water pressure at the water return end of the circulating water channel as P return by means of a pressure sensor, wherein D1-1 in the step D also comprises the step of starting shutdown timing of the circulating water pump;
the method sequentially comprises the following steps of:
step G, judging whether the stop time of the circulating water pump exceeds t stop or not:
g1, when the stop time of the circulating water pump is more than t stop, entering the step I;
and G2, when the stop time of the circulating water pump is less than or equal to T, judging the size between the T1 and the T1:
g2-1, judging whether the auxiliary energy reversing valve is conducted to conduct heat exchange between the auxiliary energy waterway and the circulating waterway when T1 is more than or equal to T1:
g2-1-1, when the auxiliary energy reversing valve blocks the auxiliary energy waterway from exchanging heat with the circulating waterway, controlling the main reversing valve to block the main energy waterway from exchanging heat with the circulating waterway, and entering into D1-1 in the step D;
g2-1-2, when the auxiliary energy reversing valve conducts the auxiliary energy waterway to exchange heat with the circulating waterway, controlling the auxiliary energy reversing valve to block the auxiliary energy waterway from exchanging heat with the circulating waterway, closing an external room temperature switch, and entering the step F;
g2-2, when T1< T1 is set, judging the size between the T1 set-T difference and T1:
g2-2-1, when T1 is set to be the difference of T1 and is larger than T1, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G;
g2-2-2, when T1 is set to be less than or equal to T1, entering the next step;
step I, judging the size between the P output and the P return:
when the outlet P is not equal to the return P, the circulating water pump is turned off, and meanwhile, the circulating water pump starts to stop for timing, and the step G is restarted;
i2, if pout=pback, go to the next step.
4. A multi-energy intelligent combined and distributed control system according to claim 3, wherein: the step G and the step I also sequentially comprise the following steps:
step H, detecting the working state of the circulating water pump:
h1, when the circulating water pump is in a starting state, judging the size of L:
h1-1, when l=0, closing the circulating water pump, starting to stop the circulating water pump for timing, and re-entering the step G;
h1-2, when L >0, entering step J;
and H2, when the circulating water pump is in a stop state, entering the next step.
5. The multi-energy intelligent combined and distributed control system according to claim 1, 3 or 4, wherein the control system comprises the following components: setting the minimum protection flow of the circulating water pump to be Lmin,
the method comprises the following steps of:
step K, resetting the water pump stop time, and judging the size between L and Lmin:
k1, when L < Lmin:
k1-1, if the flow is smaller for times N more than 30 within 24 hours, stopping the circulating water pump, and giving out a flow smaller alarm by the system;
k1-2, if the flow is smaller than or equal to 30 times within 24 hours, the flow is smaller than or equal to n=n+1 times, and the circulating water pump is restarted after stopping working and keeping t and the like;
k2, when L is more than or equal to Lmin, the flow is reduced for times N to zero, and the next step is carried out;
when the circulating water pump is a variable frequency pump, the step K should be performed before the step L2 is returned to the step L again.
6. The multi-energy intelligent combined and distributed control system according to claim 1, wherein the control system comprises the following components: t1 is set to 27-33 ℃, T2 is set to 57-63 ℃, T and the like are 15-30s, and T is stable to 15-30s.
7. The multi-energy intelligent combined and distributed control system according to claim 2, wherein: the P amount is 0.8-1.5bar, and the t supplement is 24-72h.
8. A multi-energy intelligent combined and distributed control system according to claim 3, wherein: the t stop is 5-15min, and the T difference is 3-7 ℃.
9. The multi-energy intelligent combined and distributed control system according to claim 5, wherein the control system comprises the following components: the Lmin is 2.5-3.5L/min.
CN202210233666.6A 2022-03-10 2022-03-10 Control system for intelligent combination and distribution of multiple energy sources Active CN114427698B (en)

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