CN104101062A - Energy-saving management system for ice storage central air conditioner - Google Patents
Energy-saving management system for ice storage central air conditioner Download PDFInfo
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- CN104101062A CN104101062A CN201310659207.5A CN201310659207A CN104101062A CN 104101062 A CN104101062 A CN 104101062A CN 201310659207 A CN201310659207 A CN 201310659207A CN 104101062 A CN104101062 A CN 104101062A
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Abstract
The invention discloses an energy-saving management system for an ice storage central air conditioner and relates to the field of central air conditioners. The energy-saving management system comprises a work station, a machine room system control cabinet and a tail end area control cabinet, wherein through centralized control over the tail end of an air conditioner area, data on the spot and data in the air conditioner are collected in real time and are timely fed back to a DDC (Direct Digital Controller), and the DDC changes synchronously along with the requirements of the load of the tail end so as to realize optimal management of the tail end; the highly-efficient energy-saving management system for the ice storage central air conditioner has four working modes respectively including direct refrigeration, ice storage, de-icing refrigeration and united cold supply. According to the energy-saving management system, peak-valley electricity price at night is utilized, cooling capacity is stored in a form of ice, the ice storage cooling capacity is used up during peak hour, and start-up of a host is reduced as possible or less start-up of the host is provided, so that the effect of saving resources is achieved; through intelligent control, program selection is optimized, the even running of each piece of equipment is guaranteed, and the service life of the equipment is greatly prolonged.
Description
Technical field
The present invention relates to field of central air-conditioning, relate in particular to a kind of ice storage central air-conditioning energy-saving control system.
Background technology
Along with the outburst of energy crisis; low-carbon energy-saving is more and more paid attention to; central air-conditioning is as a vital part in modern building system, and the shared proportion of its energy consumption is also very large, and the electric weight utilization rate that how to improve central air conditioner system is current urgent problem.
Ice storage central air-conditioning exactly by air conditioning electricity from daytime peak period transfer to the night dip phase, balanced urban distribution network load, utilize remain in operation refrigeration machine refrigeration of the unnecessary charged power of paddy of electrical network at night, form with ice stores, directly ice-out is provided to air-conditioning service when peak of power consumption by day, avoid central air-conditioning contention peak power.
Central air-conditioning of the prior art reaches energy-conservation object by device energy conservation mostly, energy consumption can not be dropped to minimumly, and operation hours inequality in central air-conditioning, can cause the lost of life of equipment like this, causes unnecessary waste.
Summary of the invention
The present invention provides a kind of ice storage central air-conditioning energy-saving management system for overcoming deficiency of the prior art, and this system has low-carbon energy-saving, is easy to the feature of management.
The energy-efficient management system of a kind of ice storage central air-conditioning, comprise work station, room system switch board and stub area switch board, stub area controller is connected to room system switch board by RS485 bus B ACNET agreement, room system switch board attaches to work station by network, the DDC of central authorities controller is arranged on described room system switch board, described stub area switch board is equipped with region DDC controller, described room system switch board comprises at least two chilled water pumps and supporting motor-driven valve thereof, at least two eg pumps and supporting motor-driven valve thereof, at least one cold water main unit and supporting motor-driven valve thereof, at least two cooling towers and supporting motor-driven valve and sensor, stub area controller comprises floor wind cabinet, exhaust system, area illumination system, VMC and end coiler, by the centralized Control to air conditioning area end, Real-time Collection scene and air-conditioning internal data also feed back to region DDC controller in time, and zone controller is given central DDC controller by RS485 bus B ACNET protocol transmission, and central DDC controller synchronously changes along with the demand of end load the optimum management that realizes end, the energy-efficient management system of described ice storage central air-conditioning has four kinds of mode of operations, respectively: directly refrigeration, ice-reserving, ice-melt refrigeration and air conditioning, after sensor collection site data and air-conditioning internal data, feed back to region DDC controller, comprehensive to system control cabinet, number in conjunction with machine room return water temperature data and ice-reserving amount is analyzed, judgement output is how many, the DDC of central authorities controller is according to date timetable, outdoor temperature, weather forecast, historical record, the data such as empirical data, through program judgement, automatically perform operational mode, the DDC of central authorities controller finally definite central air conditioner system is taked four kinds of one in mode of operation, after selected mode of operation, judges the running efficiency that starts several equipment and every equipment again by central DDC controller, every equipment all has it to control subprogram, by controlling the first openable quantity of judgment device of subprogram, according to accumulated running time sequence, what running time was minimum ranks the first, and starts one or multiple devices coming above according to the judgement of described central DDC controller again.
The calculating of above-mentioned resh air requirement is by outdoor temperature humidity sensor collection signal, the signal collecting is inputted to described DDC controller, ensure room minimum fresh air requirmente, room minimum fresh air requirmente is: Lw=nRp+Rb*Ab n: personnel's total number of persons, i.e. density of personnel * careat:
Rp: everyone is resh air requirement index at least, m3/ (h, people)
Rb: the required resh air requirement standard in every square, floor
Ab: the area of indoor floor
The sensor comprises temperature sensor, pressure sensor, flow sensor, outdoor temperature humidity sensor and end airduct thermometer, described temperature, pressure and flow sensor are arranged on Real-Time Monitoring water system ruuning situation on described water pipe, outdoor temperature humidity flowmeter sensor is arranged on the outdoor humiture of outdoor-monitoring and feeds back in time DDC controller, and end airduct thermometer is arranged on end by the control of floor wind cabinet controller.
The switching of above-mentioned four kinds of mode of operations can be by manually determining any one pattern of taking in four kinds of mode of operations; Also can monitor to judge by program any one operational mode of selecting in four kinds of mode of operations to environment temperature, date and time, after central air-conditioning finishes the work on daytime, in electricity price at night period phase at a low price, take ice-storage mode; In the time that ice-reserving amount is extremely low, just take direct refrigeration mode; When the load of the enough air-conditioning systems of ice-reserving amount amount is taked direct ice-melt mode; When the load of the inadequate air-conditioning system of ice-reserving amount is taked air conditioning pattern.
Above-mentioned four kinds of mode of operations are carried out respectively follow procedure:
Directly cooling program: described direct cooling program mainframe program comprises refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first valve of main frame starts refrigerating water pump subprogram after starting normally, after the normal startup of refrigerating water pump, start eg pump subprogram, after the normal startup of eg pump, open cooling water pump subprogram, cooling water pump starts the normal rear blower fan of cooling tower subprogram that starts, after all devices all normally starts and after thering is water-flow signal, Double-working-condition main frame subprogram starts, Double-working-condition main frame switches to ice-make mode, Double-working-condition main frame operation after ten minutes return water temperature be still greater than the words of 13.5 DEG C and reload a set of mainframe program, the refrigerating water pump that sequence starting immediately second is overlapped, eg pump, cooling water pump, blower fan of cooling tower and Double-working-condition main frame, if return water temperature is less than 10.5 DEG C, a set of mainframe program of off-load, Double-working-condition main frame, blower fan of cooling tower, cooling water pump, eg pump and the chilled water pump after orderly close-down, opened immediately, opening and closing are reverse orders,
Ice-melt program: described ice-melt program comprises refrigerating water pump subprogram and eg pump subprogram; Described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first valve of main frame starts refrigerating water pump subprogram after starting normally, after the normal startup of refrigerating water pump, starts eg pump subprogram;
Ice-reserving program: described ice-reserving program comprises ethylene glycol subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first main frame valve starts eg pump subprogram after starting normally, after the normal startup of eg pump, start cooling water pump subprogram, after the normal startup of cooling water pump, start blower fan of cooling tower subprogram, after the normal startup of blower fan of cooling tower, start Double-working-condition main frame, Double-working-condition main frame switches to ice-make mode, if ice-reserving amount is less than 98%, load a set of mainframe program, order is opened eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, when being greater than 98%, ice-reserving amount stops mainframe program, after orderly close-down, open Double-working-condition main frame, blower fan of cooling tower, cooling water pump and eg pump are to Close All,
Air conditioning program: described air conditioning program comprises refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram; Described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first main frame valve starts eg pump subprogram after starting normally, after the normal startup of eg pump, start cooling water pump subprogram, after the normal startup of cooling water pump, start blower fan of cooling tower subprogram, blower fan of cooling tower normally starts the rear Double-working-condition main frame subprogram that starts, and Double-working-condition main frame is switched to ice-make mode.
Above-mentioned direct cooling mode step is as follows: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear chilled water pump subprogram that starts, first judge that chilled water pump can open quantity, the priority orders of water pump, open return water temperature after 5 minutes and be still greater than 13.5 DEG C if start chilled water pump, automatically load a refrigerating water pump, if chilled water pump operation after 10 minutes return water temperature be less than 10.5 DEG C, refrigerating water pump of automatic deloading; Chilled water pump starts normal, eg pump subprogram starts, start to judge that eg pump can open quantity, priority orders, then start first group of eg pump, ethylene glycol enters plate and changes temperature and be greater than 4.5 DEG C and load an eg pump, and ethylene glycol enters plate and changes temperature and be less than 3.2 DEG C and after off-load one platform, open eg pump; Eg pump starts normal, and cooling water pump subprogram starts; First judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform; After the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform; When cooling water temperature is more than or equal to 35 DEG C, increase blower fan of cooling tower and open quantity; After all are normal, detect flow normal, start Double-working-condition main frame subprogram; Main frame can be opened quantity, and main frame is opened priority, opens First main frame and switches to refrigerating state; Main frame operation 5 minutes, changes temperature and is greater than 4.5 degree if ethylene glycol enters plate, starts the second cover mainframe program, immediately sequence starting refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram; If ethylene glycol enters plate and changes coolant-temperature gage and be less than 3.2 degree, close rear opening program, orderly close-down Double-working-condition main frame, blower fan of cooling tower, cooling water pump, eg pump and refrigerating water pump.
Above-mentioned ice-melt mode step is as follows: start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear refrigerating water pump subprogram that starts, first judgement can be opened quantity according to sorting running time, what running time was minimum ranks the first, refrigerating water pump open operation after 5 minutes return water temperature be still greater than 13.5 DEG C and load a refrigerating water pump, move 10 minutes afterwards return water temperature be less than 10.5 DEG C and after off-load one platform, open refrigerating water pump; Refrigerating water pump is normal opens eg pump subprogram after starting, and eg pump is opened after 5 minutes ethylene glycol plate and changed temperature and be greater than in 5 DEG C and load an eg pump, moves after 10 minutes ethylene glycol plate and changes temperature and be less than 3 DEG C and after off-load one platform, open eg pump.
Above-mentioned ice-storage mode step is as follows: first judge ice-reserving amount, if ice-reserving amount is greater than 98%, direct termination routine, if ice-reserving amount is less than 98%, enter following program: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear eg pump subprogram that starts, first judge that eg pump can open quantity, according to sorting running time, what running time was minimum ranks the first, a normal unlatching of eg pump loads an eg pump when ice-reserving amount is still less than 98% after 5 minutes, if ice-reserving amount is opened eg pump after being greater than 98% off-load one platform, after the normal unlatching of eg pump, start cooling water pump subprogram, first judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform, after the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, if cooling water temperature reaches 35 DEG C, open whole blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform, the normal unlatching of blower fan of cooling tower opened Double-working-condition main frame subprogram afterwards, first judgement can be opened quantity, according to sorting running time, what time running time was minimum ranks the first, after No. one Double-working-condition main frame is opened, pattern switches to ice making state, ice-reserving amount is less than 98% and loads a set of mainframe program, order is opened eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, if ice-reserving amount is greater than 98%, stop mainframe program, after orderly close-down, open Double-working-condition main frame, blower fan of cooling tower, cooling water pump and eg pump are to Close All.
Above-mentioned air conditioning mode step is as follows: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear chilled water pump subprogram that starts, first judge that chilled water pump can open quantity, the priority orders of water pump, open return water temperature after 5 minutes and be still greater than 13.5 DEG C if start chilled water pump, automatically load a refrigerating water pump, if chilled water pump operation after 10 minutes return water temperature be less than 10.5 DEG C, refrigerating water pump of automatic deloading; Chilled water pump starts normal, eg pump subprogram starts, start to judge that eg pump can open quantity, open eg pump subprogram, eg pump is opened after 5 minutes ethylene glycol plate and is changed temperature and be greater than in 5 DEG C and load an eg pump, moves after 10 minutes ethylene glycol plate and changes temperature and be less than 3 DEG C and after off-load one platform, open eg pump; Start cooling water pump subprogram, first judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform; After the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, if cooling water temperature reaches 35 DEG C, open whole blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform; After all are normal, detect flow normal, start Double-working-condition main frame subprogram; Main frame can be opened quantity, main frame is opened priority, open First main frame and switch to ice making state, move after 10 minutes ethylene glycol plate and change temperature and be greater than 4.5 DEG C and load a Double-working-condition main frame, ethylene glycol plate changes temperature and is less than 3.2 DEG C of Double-working-condition mainframe programs of off-load.
Beneficial effect of the present invention: utilize the time-of-use tariffs at night, cold is stored by the form of ice, in peak times of power consumption, ice-reserving cold is used up, and reduce as far as possible main frame start or few start, can reach the effect economizing on resources; Adopt different patterns to deal with different situations, can at utmost reduce air conditioning energy consumption, reach the effect of energy-saving and emission-reduction; By intelligent control, the control and management of temperature ladder, the optimization utilization of new wind, improves environmental degree of comfort simultaneously, realizes energy saving of system, and optimizer is selected, and ensures the equilibrium operating of every equipment, has improved greatly the service life of equipment.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is main program figure of the present invention.
Fig. 3 is subprogram figure under direct refrigeration mode of the present invention.
Fig. 4 is subprogram figure under ice-melt mode of the present invention.
Fig. 5 is subprogram figure under ice-storage mode of the present invention.
Fig. 6 is subprogram figure under air conditioning pattern of the present invention.
Detailed description of the invention
For better explanation the present invention, be now described further by reference to the accompanying drawings.
As shown in Figure 1, the energy-efficient management system of a kind of ice storage central air-conditioning, comprise work station, room system switch board and stub area switch board, stub area controller is connected to room system switch board by RS485 bus B ACNET agreement, room system switch board attaches to work station by network, the DDC of central authorities controller is arranged on described room system switch board, described stub area switch board is equipped with region DDC controller, described room system switch board comprises at least two chilled water pumps and supporting motor-driven valve thereof, at least two eg pumps and supporting motor-driven valve thereof, at least one cold water main unit and supporting motor-driven valve thereof, at least two cooling towers and supporting motor-driven valve and sensor, stub area controller comprises floor wind cabinet, exhaust system, area illumination system, VMC and end coiler, it is characterized in that: by the centralized Control to air conditioning area end, Real-time Collection scene and air-conditioning internal data also feed back to region DDC controller in time, and zone controller is given central DDC controller by RS485 bus B ACNET protocol transmission, and central DDC controller synchronously changes along with the demand of end load the optimum management that realizes end, the energy-efficient management system of described ice storage central air-conditioning has four kinds of mode of operations, respectively: directly refrigeration, ice-reserving, ice-melt refrigeration and air conditioning, after sensor collection site data and air-conditioning internal data, feed back to region DDC controller, comprehensive to system control cabinet, number in conjunction with machine room return water temperature data and ice-reserving amount is analyzed, judgement output is how many, the DDC of central authorities controller is according to date timetable, outdoor temperature, weather forecast, historical record, the data such as empirical data, through program judgement, automatically perform operational mode, the DDC of central authorities controller finally definite central air conditioner system is taked four kinds of one in mode of operation, after selected mode of operation, judges the running efficiency that starts several equipment and every equipment again by central DDC controller, every equipment all has it to control subprogram, by controlling the first openable quantity of judgment device of subprogram, according to accumulated running time sequence, what running time was minimum ranks the first, and starts one or multiple devices coming above according to the judgement of described central DDC controller again.
The calculating of resh air requirement, by outdoor temperature humidity sensor collection signal, is inputted described DDC controller by the signal collecting, and ensures room minimum fresh air requirmente, and room minimum fresh air requirmente is: Lw=nRp+Rb*Ab n: personnel's total number of persons, i.e. density of personnel * careat:
Rp: everyone is resh air requirement index at least, m3/ (h, people)
Rb: the required resh air requirement standard in every square, floor
Ab: the area of indoor floor
Sensor comprises temperature sensor, pressure sensor, flow sensor, outdoor temperature humidity sensor and end airduct thermometer, described temperature, pressure and flow sensor are arranged on Real-Time Monitoring water system ruuning situation on described water pipe, outdoor temperature humidity flowmeter sensor is arranged on the outdoor humiture of outdoor-monitoring and feeds back in time DDC controller, and end airduct thermometer is arranged on end by the control of floor wind cabinet controller.
The switching of four kinds of mode of operations can be by manually determining any one pattern of taking in four kinds of mode of operations; Also can monitor to judge by program any one operational mode of selecting in four kinds of mode of operations to environment temperature, date and time, after central air-conditioning finishes the work on daytime, in electricity price at night period phase at a low price, take ice-storage mode; In the time that ice-reserving amount is extremely low, just take direct refrigeration mode; When the load of the enough air-conditioning systems of ice-reserving amount amount is taked direct ice-melt mode; When the load of the inadequate air-conditioning system of ice-reserving amount is taked air conditioning pattern.
As shown in Figure 2, four kinds of mode of operations are carried out respectively follow procedure:
Directly cooling program: described direct cooling program mainframe program comprises refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first valve of main frame starts refrigerating water pump subprogram after starting normally, after the normal startup of refrigerating water pump, start eg pump subprogram, after the normal startup of eg pump, open cooling water pump subprogram, cooling water pump starts the normal rear blower fan of cooling tower subprogram that starts, after all devices all normally starts and after thering is water-flow signal, Double-working-condition main frame subprogram starts, Double-working-condition main frame switches to ice-make mode, Double-working-condition main frame operation after ten minutes return water temperature be still greater than the words of 13.5 DEG C and reload a set of mainframe program, the refrigerating water pump that sequence starting immediately second is overlapped, eg pump, cooling water pump, blower fan of cooling tower and Double-working-condition main frame, if return water temperature is less than 10.5 DEG C, a set of mainframe program of off-load, Double-working-condition main frame, blower fan of cooling tower, cooling water pump, eg pump and the chilled water pump after orderly close-down, opened immediately, opening and closing are reverse orders,
Ice-melt program: described ice-melt program comprises refrigerating water pump subprogram and eg pump subprogram; Described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first valve of main frame starts refrigerating water pump subprogram after starting normally, after the normal startup of refrigerating water pump, starts eg pump subprogram;
Ice-reserving program: described ice-reserving program comprises ethylene glycol subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first main frame valve starts eg pump subprogram after starting normally, after the normal startup of eg pump, start cooling water pump subprogram, after the normal startup of cooling water pump, start blower fan of cooling tower subprogram, after the normal startup of blower fan of cooling tower, start Double-working-condition main frame, Double-working-condition main frame switches to ice-make mode, if ice-reserving amount is less than 98%, load a set of mainframe program, order is opened eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, if ice-reserving amount is greater than 98%, stop mainframe program, after orderly close-down, open Double-working-condition main frame, blower fan of cooling tower, cooling water pump and eg pump are to Close All,
Air conditioning program: described air conditioning program comprises refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram; Described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first main frame valve starts eg pump subprogram after starting normally, after the normal startup of eg pump, start cooling water pump subprogram, after the normal startup of cooling water pump, start blower fan of cooling tower subprogram, blower fan of cooling tower normally starts the rear Double-working-condition main frame subprogram that starts, and Double-working-condition main frame is switched to ice-make mode.
As shown in Figure 3, directly cooling mode step is as follows: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear chilled water pump subprogram that starts, first judge that chilled water pump can open quantity, the priority orders of water pump, open return water temperature after 5 minutes and be still greater than 13.5 DEG C if start chilled water pump, automatically load a refrigerating water pump, if chilled water pump operation after 10 minutes return water temperature be less than 10.5 DEG C, refrigerating water pump of automatic deloading; Chilled water pump starts normal, eg pump subprogram starts, start to judge that eg pump can open quantity, priority orders, then start first group of eg pump, ethylene glycol enters plate and changes temperature and be greater than 4.5 DEG C and load an eg pump, and ethylene glycol enters plate and changes temperature and be less than 3.2 DEG C and after off-load one platform, open eg pump; Eg pump starts normal, and cooling water pump subprogram starts; First judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform; After the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform; When cooling water temperature is more than or equal to 35 DEG C, increase blower fan of cooling tower and open quantity; After all are normal, detect flow normal, start Double-working-condition main frame subprogram; Main frame can be opened quantity, and main frame is opened priority, opens First main frame and switches to refrigerating state; Main frame operation 5 minutes, changes temperature and is greater than 4.5 degree if ethylene glycol enters plate, starts the second cover mainframe program, immediately sequence starting refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram; If ethylene glycol enters plate and changes coolant-temperature gage and be less than 3.2 degree, close rear opening program, orderly close-down Double-working-condition main frame, blower fan of cooling tower, cooling water pump, eg pump and refrigerating water pump.
As shown in Figure 4, ice-melt mode step is as follows: start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear refrigerating water pump subprogram that starts, first judgement can be opened quantity according to sorting running time, what running time was minimum ranks the first, refrigerating water pump open operation after 5 minutes return water temperature be still greater than 13.5 DEG C and load a refrigerating water pump, move 10 minutes afterwards return water temperature be less than 10.5 DEG C and after off-load one platform, open refrigerating water pump; Refrigerating water pump is normal opens eg pump subprogram after starting, and eg pump is opened after 5 minutes ethylene glycol plate and changed temperature and be greater than in 5 DEG C and load an eg pump, moves after 10 minutes ethylene glycol plate and changes temperature and be less than 3 DEG C and after off-load one platform, open eg pump.
As shown in Figure 5, ice-storage mode step is as follows: first judge ice-reserving amount, if ice-reserving amount is greater than 98%, direct termination routine, if ice-reserving amount is less than 98%, enter following program: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear eg pump subprogram that starts, first judge that eg pump can open quantity, according to sorting running time, what running time was minimum ranks the first, a normal unlatching of eg pump loads an eg pump when ice-reserving amount is still less than 98% after 5 minutes, if ice-reserving amount is opened eg pump after being greater than 98% off-load one platform, after the normal unlatching of eg pump, start cooling water pump subprogram, first judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform, after the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, if cooling water temperature reaches 35 DEG C, open whole blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform, the normal unlatching of blower fan of cooling tower opened Double-working-condition main frame subprogram afterwards, first judgement can be opened quantity, according to sorting running time, what time running time was minimum ranks the first, after No. one Double-working-condition main frame is opened, pattern switches to ice making state, ice-reserving amount is less than 98% and loads a set of mainframe program, order is opened eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, if ice-reserving amount is greater than 98%, stop mainframe program, after orderly close-down, open Double-working-condition main frame, blower fan of cooling tower, cooling water pump and eg pump are to Close All.
As shown in Figure 6, air conditioning mode step is as follows: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear chilled water pump subprogram that starts, first judge that chilled water pump can open quantity, the priority orders of water pump, open return water temperature after 5 minutes and be still greater than 13.5 DEG C if start chilled water pump, automatically load a refrigerating water pump, if chilled water pump operation after 10 minutes return water temperature be less than 10.5 DEG C, refrigerating water pump of automatic deloading; Chilled water pump starts normal, eg pump subprogram starts, start to judge that eg pump can open quantity, open eg pump subprogram, eg pump is opened after 5 minutes ethylene glycol plate and is changed temperature and be greater than in 5 DEG C and load an eg pump, moves after 10 minutes ethylene glycol plate and changes temperature and be less than 3 DEG C and after off-load one platform, open eg pump; Start cooling water pump subprogram, first judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform; After the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, if cooling water temperature reaches 35 DEG C, open whole blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform; After all are normal, detect flow normal, start Double-working-condition main frame subprogram; Main frame can be opened quantity, main frame is opened priority, open First main frame and switch to ice making state, move after 10 minutes ethylene glycol plate and change temperature and be greater than 4.5 DEG C and load a Double-working-condition main frame, ethylene glycol plate changes temperature and is less than 3.2 DEG C of Double-working-condition mainframe programs of off-load.
Claims (9)
1. the energy-efficient management system of ice storage central air-conditioning, comprise work station, room system switch board and stub area switch board, stub area controller is connected to room system switch board by RS485 bus B ACNET agreement, room system switch board attaches to work station by network, the DDC of central authorities controller is arranged on described room system switch board, described stub area switch board is equipped with region DDC controller, described room system switch board comprises at least two chilled water pumps and supporting motor-driven valve thereof, at least two eg pumps and supporting motor-driven valve thereof, at least one cold water main unit and supporting motor-driven valve thereof, at least two cooling towers and supporting motor-driven valve and sensor, stub area controller comprises floor wind cabinet, exhaust system, area illumination system, VMC and end coiler, it is characterized in that: by the centralized Control to air conditioning area end, Real-time Collection scene and air-conditioning internal data also feed back to region DDC controller in time, and zone controller is given central DDC controller by RS485 bus B ACNET protocol transmission, and central DDC controller synchronously changes along with the demand of end load the optimum management that realizes end, the energy-efficient management system of described ice storage central air-conditioning has four kinds of mode of operations, respectively: directly refrigeration, ice-reserving, ice-melt refrigeration and air conditioning, after sensor collection site data and air-conditioning internal data, feed back to region DDC controller, comprehensive to system control cabinet, number in conjunction with machine room return water temperature data and ice-reserving amount is analyzed, judgement output is how many, the DDC of central authorities controller is according to date timetable, outdoor temperature, weather forecast, historical record, the data such as empirical data, through program judgement, automatically perform operational mode, the DDC of central authorities controller finally definite central air conditioner system is taked four kinds of one in mode of operation, after selected mode of operation, judges the running efficiency that starts several equipment and every equipment again by central DDC controller, every equipment all has it to control subprogram, by controlling the first openable quantity of judgment device of subprogram, according to accumulated running time sequence, what running time was minimum ranks the first, and starts one or multiple devices coming above according to the judgement of described central DDC controller again.
2. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 1, it is characterized in that: the calculating of described resh air requirement is by outdoor temperature humidity sensor collection signal, the signal collecting is inputted to described DDC controller, ensure room minimum fresh air requirmente, room minimum fresh air requirmente is: Lw=nRp+Rb*Ab n: personnel's total number of persons, i.e. density of personnel * careat:
Rp: everyone is resh air requirement index at least, m3/ (h, people)
Rb: the required resh air requirement standard in every square, floor
Ab: the area of indoor floor.
3. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 1, it is characterized in that: described sensor comprises temperature sensor, pressure sensor, flow sensor, outdoor temperature humidity sensor and end airduct thermometer, described temperature, pressure and flow sensor are arranged on Real-Time Monitoring water system ruuning situation on described water pipe, outdoor temperature humidity flowmeter sensor is arranged on the outdoor humiture of outdoor-monitoring and feeds back in time DDC controller, and end airduct thermometer is arranged on end by the control of floor wind cabinet controller.
4. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 1, is characterized in that: the switching of described four kinds of mode of operations can be by manually determining any one pattern of taking in four kinds of mode of operations; Also can monitor to judge by program any one operational mode of selecting in four kinds of mode of operations to environment temperature, date and time, after central air-conditioning finishes the work on daytime, in electricity price at night period phase at a low price, take ice-storage mode; In the time that ice-reserving amount is extremely low, just take direct refrigeration mode; When the load of the enough air-conditioning systems of ice-reserving amount amount is taked direct ice-melt mode; When the load of the inadequate air-conditioning system of ice-reserving amount is taked air conditioning pattern.
5. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 1, is characterized in that: four kinds of mode of operations are carried out respectively follow procedure:
Directly cooling program: described direct cooling program mainframe program comprises refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first valve of main frame starts refrigerating water pump subprogram after starting normally, after the normal startup of refrigerating water pump, start eg pump subprogram, after the normal startup of eg pump, open cooling water pump subprogram, cooling water pump starts the normal rear blower fan of cooling tower subprogram that starts, after all devices all normally starts and after thering is water-flow signal, Double-working-condition main frame subprogram starts, Double-working-condition main frame switches to ice-make mode, Double-working-condition main frame operation after ten minutes return water temperature be still greater than the words of 13.5 DEG C and reload a set of mainframe program, the refrigerating water pump that sequence starting immediately second is overlapped, eg pump, cooling water pump, blower fan of cooling tower and Double-working-condition main frame, if return water temperature is less than 10.5 DEG C, a set of mainframe program of off-load, Double-working-condition main frame, blower fan of cooling tower, cooling water pump, eg pump and the chilled water pump after orderly close-down, opened immediately, opening and closing are reverse orders,
Ice-melt program: described ice-melt program comprises refrigerating water pump subprogram and eg pump subprogram; Described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first valve of main frame starts refrigerating water pump subprogram after starting normally, after the normal startup of refrigerating water pump, starts eg pump subprogram;
Ice-reserving program: described ice-reserving program comprises ethylene glycol subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first main frame valve starts eg pump subprogram after starting normally, after the normal startup of eg pump, start cooling water pump subprogram, after the normal startup of cooling water pump, start blower fan of cooling tower subprogram, after the normal startup of blower fan of cooling tower, start Double-working-condition main frame, Double-working-condition main frame switches to ice-make mode, if ice-reserving amount is less than 98%, load a set of mainframe program, order is opened eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, if ice-reserving amount is greater than 98%, stop mainframe program, after orderly close-down, open Double-working-condition main frame, blower fan of cooling tower, cooling water pump and eg pump are to Close All,
Air conditioning program: described air conditioning program comprises refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram; Described room system switch board is carried out following program after receiving instruction: start, after valve starts, first discharge the boot sequence of main frame, first main frame valve starts eg pump subprogram after starting normally, after the normal startup of eg pump, start cooling water pump subprogram, after the normal startup of cooling water pump, start blower fan of cooling tower subprogram, blower fan of cooling tower normally starts the rear Double-working-condition main frame subprogram that starts, and Double-working-condition main frame is switched to ice-make mode.
6. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 5, it is characterized in that: described direct cooling mode step is as follows: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear chilled water pump subprogram that starts, first judge that chilled water pump can open quantity, the priority orders of water pump, open return water temperature after 5 minutes and be still greater than 13.5 DEG C if start chilled water pump, automatically load a refrigerating water pump, if return water temperature is less than 10.5 DEG C, refrigerating water pump of automatic deloading after chilled water pump moves 10 minutes, chilled water pump starts normal, eg pump subprogram starts, start to judge that eg pump can open quantity, priority orders, then start first group of eg pump, ethylene glycol enters plate and changes temperature and be greater than 4.5 DEG C and load an eg pump, and ethylene glycol enters plate and changes temperature and be less than 3.2 DEG C and after off-load one platform, open eg pump, eg pump starts normal, and cooling water pump subprogram starts, first judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform, after the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform, when cooling water temperature is more than or equal to 35 DEG C, increase blower fan of cooling tower and open quantity, after all are normal, detect flow normal, start Double-working-condition main frame subprogram, main frame can be opened quantity, and main frame is opened priority, opens First main frame and switches to refrigerating state, main frame operation 5 minutes, changes temperature and is greater than 4.5 degree if ethylene glycol enters plate, starts the second cover mainframe program, immediately sequence starting refrigerating water pump subprogram, eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, if ethylene glycol enters plate and changes coolant-temperature gage and be less than 3.2 degree, close rear opening program, orderly close-down Double-working-condition main frame, blower fan of cooling tower, cooling water pump, eg pump and refrigerating water pump.
7. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 5, it is characterized in that: described ice-melt mode step is as follows: start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear refrigerating water pump subprogram that starts, first judgement can be opened quantity according to sorting running time, what running time was minimum ranks the first, refrigerating water pump open operation after 5 minutes return water temperature be still greater than 13.5 DEG C and load a refrigerating water pump, move 10 minutes afterwards return water temperature be less than 10.5 DEG C and after off-load one platform, open refrigerating water pump; Refrigerating water pump is normal opens eg pump subprogram after starting, and eg pump is opened after 5 minutes ethylene glycol plate and changed temperature and be greater than in 5 DEG C and load an eg pump, moves after 10 minutes ethylene glycol plate and changes temperature and be less than 3 DEG C and after off-load one platform, open eg pump.
8. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 5, it is characterized in that: described ice-storage mode step is as follows: first judge ice-reserving amount, if ice-reserving amount is greater than 98%, direct termination routine, if ice-reserving amount is less than 98%, enter following program: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear eg pump subprogram that starts, first judge that eg pump can open quantity, according to sorting running time, what running time was minimum ranks the first, a normal unlatching of eg pump loads an eg pump when ice-reserving amount is still less than 98% after 5 minutes, if ice-reserving amount is opened eg pump after being greater than 98% off-load one platform, after the normal unlatching of eg pump, start cooling water pump subprogram, first judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform, after the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, if cooling water temperature reaches 35 DEG C, open whole blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform, the normal unlatching of blower fan of cooling tower opened Double-working-condition main frame subprogram afterwards, first judgement can be opened quantity, according to sorting running time, what time running time was minimum ranks the first, after No. one Double-working-condition main frame is opened, pattern switches to ice making state, ice-reserving amount is less than 98% and loads a set of mainframe program, order is opened eg pump subprogram, cooling water pump subprogram, blower fan of cooling tower subprogram and Double-working-condition main frame subprogram, if ice-reserving amount is greater than 98%, stop mainframe program, after orderly close-down, open Double-working-condition main frame, blower fan of cooling tower, cooling water pump and eg pump are to Close All.
9. a kind of ice storage central air-conditioning high-efficiency energy-saving control as claimed in claim 5, it is characterized in that: described air conditioning mode step is as follows: first determine host startup sequence, then start first set mainframe program, start-up mode control motor-driven valve and main frame motor-driven valve, cooling tower motor-driven valve, valve starts the normal rear chilled water pump subprogram that starts, first judge that chilled water pump can open quantity, the priority orders of water pump, open return water temperature after 5 minutes and be still greater than 13.5 DEG C if start chilled water pump, automatically load a refrigerating water pump, if return water temperature is less than 10.5 DEG C, refrigerating water pump of automatic deloading after chilled water pump moves 10 minutes, chilled water pump starts normal, eg pump subprogram starts, start to judge that eg pump can open quantity, open eg pump subprogram, eg pump is opened after 5 minutes ethylene glycol plate and is changed temperature and be greater than in 5 DEG C and load an eg pump, moves after 10 minutes ethylene glycol plate and changes temperature and be less than 3 DEG C and after off-load one platform, open eg pump, start cooling water pump subprogram, first judge that cooling water pump can open quantity, according to sorting running time, what running time was minimum ranks the first, cooling water pump is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a cooling water pump, cooling water pump operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of cooling water pumps of opening after off-load one platform, after the normal unlatching of cooling water pump, open blower fan of cooling tower subprogram, first judge that blower fan of cooling tower can open quantity, according to sorting running time, what running time was minimum ranks the first, blower fan of cooling tower is normal to be opened after 5 minutes cooling water and enters backwater temperature difference and be still greater than 5 DEG C and load a blower fan of cooling tower, if cooling water temperature reaches 35 DEG C, open whole blower fan of cooling tower, blower fan of cooling tower operation after 10 minutes cooling water enter backwater temperature difference and be less than 3 DEG C of blower fan of cooling tower of opening after off-load one platform, after all are normal, detect flow normal, start Double-working-condition main frame subprogram, main frame can be opened quantity, main frame is opened priority, open First main frame and switch to ice making state, move after 10 minutes ethylene glycol plate and change temperature and be greater than 4.5 DEG C and load a Double-working-condition main frame, ethylene glycol plate changes temperature and is less than 3.2 DEG C of Double-working-condition mainframe programs of off-load.
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| CN104913438A (en) * | 2015-05-19 | 2015-09-16 | 广州供电局有限公司 | Ice storage system control optimization method and system |
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