CN105042968B - The control method of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation - Google Patents
The control method of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation Download PDFInfo
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- CN105042968B CN105042968B CN201510320884.3A CN201510320884A CN105042968B CN 105042968 B CN105042968 B CN 105042968B CN 201510320884 A CN201510320884 A CN 201510320884A CN 105042968 B CN105042968 B CN 105042968B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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Abstract
The present invention relates to the control methods of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation, it is characterised in that: sets the total Inlet and outlet water water temperature of unit hot water side as t1And t2, the corresponding hot water side design inlet and outlet temperature of every compressor is tn1And tn2, n is concatenated n-th compressor, and it is t that the 1st compressor hot water side, which passes in and out water temperature,11And t12；The practical inlet and outlet temperature of unit is t1And t2；As practical inflow temperature t1≤t12When, open whole compressors；As practical inflow temperature t12< t1≤t22When, stop the first compressor, only opens 2-n compressor；As practical inflow temperature t22< t1≤t32When, stop First and the second compressor, only opens 3-n compressor；As practical inflow temperature t(n‑1)2< t1≤t2When, the n-th compressor is opened, when water temperature changes in the range, matched load variation is carried by the plus-minus of unit；When inflow temperature reaches t2At+1 DEG C, stop whole compressors.The present invention has the characteristics that make the beneficial effects such as unit efficient operation, energy saving.
Description
Technical field
The present invention relates to a kind of control methods of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation.
Belong to Heating,Ventilating and Air Conditioning/plumbing technical field.
Background technique
Currently, having domestic hot-water's demand in the buildings such as hotel, hospital and school, generally providing domestic hot-water
Mode have air source heat pump system, boiler house system and hydrothermal pump system etc., wherein with water-water heat pump Energy Efficiency Ratio highest.
In the prior art, for hydrothermal pump system, core equipment is water-water heat pump Hot water units, is energy step benefit
With multiple compressors are generally arranged in efficient water-water heat pump unit, to step up water temperature, and keep unit efficiency.But it is existing
Control method in, when sub-load or inflow temperature change, generally by the simple unloading (all unloadings) to unit,
That there are control processes is rough, compressor efficiency is low, the high defects such as low with unit eer of energy consumption of compressor.
Therefore, it in order to improve the efficiency and Energy Efficiency Ratio of unit, needs to propose a kind of new control method, makes unit in part
When load, unit energy efficient operation.
Summary of the invention
The purpose of the present invention, to be that there are control processes to solve existing control method rough, compressor efficiency is low, compressor
Energy consumption height and the low problem of unit eer provide a kind of multi-compressor energy cascade utilization water-water heat pump Hot water units and efficiently transport
Capable control method has the characteristics that make unit efficient operation, energy saving.
The purpose of the present invention can be reached by adopting the following technical scheme that:
The control method of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation, it is characterised in that: set
A fixed water-water heat pump Hot water units have a n compressor, and the corresponding hot water side design inlet and outlet temperature of every compressor is tn1With
tn2, n is concatenated n-th compressor, and it is t that the 1st compressor hot water side, which passes in and out water temperature,11And t12；The practical inlet and outlet temperature of unit
For t1And t2；
1) as practical inflow temperature t1≤t12When, it opens whole compressors and passes through machine when water temperature changes in the range
Group plus-minus carries matched load variation；
2) as practical inflow temperature t12< t1≤t22When, stop the first compressor, only opens 2-n compressor, when
When water temperature changes in the range, matched load variation is carried by the plus-minus of unit；
3) as practical inflow temperature t22< t1≤t32When, stop First and the second compressor, only opens 3-n platform pressure
Contracting machine carries matched load variation by the plus-minus of unit when water temperature changes in the range；
And so on ...
4) as practical inflow temperature t(n-1)2< t1≤t2When, the n-th compressor is opened, when water temperature changes in the range
When, matched load variation is carried by the plus-minus of unit；
5) when inflow temperature reaches t2At+1 DEG C, stop whole compressors.
The purpose of the present invention can be reached by adopting the following technical scheme that:
Further preferred embodiment is each 4 compressor of high-temperature water water heat-pump hot-water unit band, designs inlet water temperature degree
It is 15 DEG C, leaving water temperature is 60 DEG C；The corresponding hot side inflow temperature of first compressor is 15 DEG C, leaving water temperature is 28 DEG C, the
The corresponding hot side inflow temperature of two compressors is 28 DEG C, leaving water temperature is 40 DEG C, the corresponding hot side water inlet of third compressor
Temperature is 40 DEG C, leaving water temperature is 50 DEG C, and the corresponding hot side inflow temperature of the 4th compressor is 50 DEG C, leaving water temperature 60
℃；
1) as practical inflow temperature t1At≤28 DEG C, whole compressors are opened, when water inlet temperature becomes within the scope of 15 DEG C -28 DEG C
When change, matched load variation is carried by the plus-minus of unit；
2) as 28 DEG C of < t of practical inflow temperature1At≤40 DEG C, 2-4 compressor is opened, when water temperature is at 28 DEG C -40 DEG C
In range when variation, matched load variation is carried by the plus-minus of unit；
3) as 40 DEG C of < t of practical inflow temperature1At≤50 DEG C, 3-4 compressor is opened, when water temperature is at 40 DEG C -50 DEG C
In range when variation, matched load variation is carried by the plus-minus of compressor；
4) as 50 DEG C of < t of practical inflow temperature1At≤60 DEG C, the 4th compressor is opened, when water temperature is in 50 DEG C of -60 DEG C of models
When enclosing interior variation, matched load variation is carried by the plus-minus of compressor；
5) when inflow temperature reaches 61 DEG C, stop whole compressors, unit is out of service.
Further preferred embodiment is that 1) the point plus-minus load matched load variation by unit refers to: unit
Inflow temperature is 15 DEG C, leaving water temperature is 60 DEG C, and the water-in and water-out temperature difference is 45 DEG C；When water temperature is higher than 15 DEG C, always into and out of water temperature
Difference becomes smaller than 45 DEG C, and in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time, unit sub-load fortune
Row, inflow temperature is higher, and unit unloading is more；I.e. inlet water temperature is compared with eve time water temperature, and water temperature height then unloads, water temperature
Low then unit load operating；When water temperature is lower than 15 DEG C, required thermic load is greater than design heating load, and compressor standard-sized sheet is transported at full capacity
Row.
Further preferred embodiment is that 2) the point plus-minus load matched load variation by unit refers to: 2-
The corresponding design water temperature of 4 compressors is 28 DEG C -60 DEG C, and design disengaging water temperature difference is 32 DEG C, when inlet water temperature is higher than 28 DEG C,
Total water-in and water-out temperature difference becomes smaller than 32 DEG C, and in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time, unit
Operation at part load, inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with eve time water temperature, water temperature Gao Ze
Unloading, the low then unit load operating of water temperature.
Further preferred embodiment is that 3) the point plus-minus load matched load variation by unit refers to: 3-
The corresponding design water temperature of 4 compressors is 40 DEG C -60 DEG C, and the design water-in and water-out temperature difference is 20 DEG C, when inlet water temperature is higher than 40 DEG C
When, it designs total water-in and water-out temperature difference and becomes smaller than 20 DEG C, in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time
It carries, unit operation at part load, inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with eve time water temperature, water
Warm height then unloads, the low then unit load operating of water temperature.
Further preferred embodiment is that 4) the point plus-minus load matched load variation by unit refers to: the 4th
The corresponding design water temperature of compressor is 50 DEG C -60 DEG C, and design disengaging water temperature difference is 10 DEG C, when inlet water temperature is higher than 50 DEG C,
It designs total water-in and water-out temperature difference and becomes smaller than 10 DEG C, in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time,
Unit operation at part load, inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with eve time water temperature, water temperature
It is high then unload, the low then unit load operating of water temperature.
Invention has the advantages that prominent and beneficial effect as follows
The present invention passes through the variation of the inflow temperature of analysis unit, and the compressor number of units of priority acccess control unit operation works as platform
When number control is unsatisfactory for requiring, then unit adding and subtracting load control is carried out, is a kind of controlling party of fining compared with the prior art therefore
Method, which can make the preferable matched load variation of unit, when inflow temperature increases, it is possible to reduce compressor operating
Number of units, conversely, when inflow temperature reduce when increase compressor operating number of units, to mention on the basis of guarantee coolant-temperature gage
The efficiency of high compressor saves energy consumption of compressor and guarantees unit eer.Therefore, existing control method presence is solved to control
Journey is rough, compressor efficiency is low, the high problem low with unit eer of energy consumption of compressor, and having makes unit efficient operation, saves
The beneficial effects such as the characteristics of energy.
Specific embodiment
Specific embodiment 1:
Certain 4 compressor of high-temperature water water heat-pump hot-water unit band, design inlet and outlet temperature are 15 DEG C and 60 DEG C.First pressure
The corresponding hot side inlet and outlet temperature of contracting machine be 15 DEG C and 28 DEG C, the corresponding hot side inlet and outlet temperature of the second compressor be 28 DEG C with
40 DEG C, the corresponding hot side inlet and outlet temperature of third compressor is 40 DEG C and 50 DEG C, the corresponding hot side disengaging of the 4th compressor
Coolant-temperature gage is 50 DEG C and 60 DEG C；
Specific control method are as follows:
1) as practical inflow temperature t1At≤28 DEG C, opens whole compressors and pass through when water temperature changes in the range
The plus-minus of unit carries matched load variation；Such as: under design conditions, inflow temperature is 15 DEG C, and disengaging water temperature difference is 45 DEG C；Work as water
When temperature is higher than 15 DEG C, such as 20 DEG C of water temperature, it is 40 DEG C, in the case where flow is constant, required thermic load that total supply backwater temperature difference, which becomes smaller,
Become smaller, unit unloads at this time, and if helical-lobe compressor can be by regulating slide valve, unit operation at part load, inflow temperature is higher, machine
Group unloading is more；Compared with eve time water temperature, water temperature height then unloads inlet water temperature, the low then unit load operating of water temperature；When
When water temperature is lower than 15 DEG C, required thermic load is greater than design heating load, compressor standard-sized sheet oepration at full load at this time；
2) as 28 DEG C of < t of practical inflow temperature1At≤40 DEG C, 2-4 compressor is opened, when water temperature becomes in the range
When change, matched load variation is carried by the plus-minus of unit；Such as: the corresponding design water temperature of 2-4 compressor is 28 DEG C -60
DEG C, design disengaging water temperature difference is 32 DEG C, and when inlet water temperature is higher than 28 DEG C, such as 32 DEG C, it is 28 DEG C that total supply backwater temperature difference, which becomes smaller,
In the case that flow is constant, required thermic load becomes smaller, and unit unloads at this time, as helical-lobe compressor can pass through regulating slide valve, unit
Operation at part load, inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with eve time water temperature, water temperature Gao Ze
Unloading, the low then unit load operating of water temperature；
3) as 40 DEG C of < t of practical inflow temperature1At≤50 DEG C, 3-4 compressor is opened, when water temperature becomes in the range
When change, matched load variation is carried by the plus-minus of compressor；Such as: the corresponding design water temperature of 3-4 compressor is 40 DEG C -60
DEG C, design disengaging water temperature difference is 20 DEG C, and when inlet water temperature is higher than 40 DEG C, such as 45 DEG C, it is 15 DEG C that total supply backwater temperature difference, which becomes smaller,
In the case that flow is constant, required thermic load becomes smaller, and unit unloads at this time, as helical-lobe compressor can pass through regulating slide valve, unit
Operation at part load, inflow temperature is higher, and unit unloading is more, and inlet water temperature is compared with eve time water temperature, water temperature Gao Ze
Unloading, the low then unit load operating of water temperature；
4) as 50 DEG C of < t of practical inflow temperature1At≤60 DEG C, the 4th compressor is opened, when water temperature changes in the range
When, matched load variation is carried by the plus-minus of compressor；Such as: the corresponding design water temperature of the 4th compressor is 50 DEG C -60 DEG C,
Design disengaging water temperature difference is 10 DEG C, and when inlet water temperature is higher than 50 DEG C, such as 55 DEG C, it is 5 DEG C that total supply backwater temperature difference, which becomes smaller, in flow
In the case where constant, required thermic load becomes smaller, and unit unloads at this time, as helical-lobe compressor can pass through regulating slide valve, unit part
Load operation, inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with the water temperature of eve, and water temperature height then unloads, water
The low then unit load operating of temperature.
5) when inflow temperature reaches 61 DEG C, stop whole compressors, unit is out of service.
Other specific embodiments:
The characteristics of other specific embodiments of the invention is: one water-water heat pump Hot water units of setting have n compressor, unit heat
The total Inlet and outlet water water temperature in water side is t1And t2, the corresponding hot water side design inlet and outlet temperature of every compressor is tn1And tn2, n is string
N-th compressor of connection, it is t that the 1st compressor hot water side, which passes in and out water temperature,11And t12；The practical inlet and outlet temperature of unit is t1And t2；
N is the constant of 2-10；
1) as practical inflow temperature t1≤t12When, it opens whole compressors and passes through machine when water temperature changes in the range
Group plus-minus carries matched load variation；
2) as practical inflow temperature t12< t1≤t22When, stop the first compressor, only opens 2-n compressor, when
When water temperature changes in the range, matched load variation is carried by the plus-minus of unit；
3) as practical inflow temperature t22< t1≤t32When, stop First and the second compressor, only opens 3-n platform pressure
Contracting machine carries matched load variation by the plus-minus of unit when water temperature changes in the range；
And so on ...
4) as practical inflow temperature t(n-1)2< t1≤t2When, the n-th compressor is opened, when water temperature changes in the range
When, matched load variation is carried by the plus-minus of unit；
5) when inflow temperature reaches t2At+1 DEG C, stop whole compressors.
Remaining is the same as specific embodiment 1.
The above is to be explained in detail in conjunction with attached drawing to the preferred embodiment of the present invention, but the present invention is not limited to upper
Embodiment is stated, within the knowledge of a person skilled in the art, present inventive concept can also not departed from
Under the premise of various changes can be made, all in the scope of protection of the invention.
Claims (6)
1. the control method of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation, it is characterised in that: setting
One water-water heat pump Hot water units have a n compressor, and the corresponding hot water side design inlet and outlet temperature of every compressor is tn1And tn2, n
For concatenated n-th compressor, it is t that the 1st compressor hot water side, which passes in and out water temperature,11And t12；The practical inlet and outlet temperature of unit is t1
And t2；
1) as practical inflow temperature t1≤t12When, open whole compressors, when water temperature changes in the range, by unit plus
The variation of off-load matched load；
2) as practical inflow temperature t12< t1≤t22When, stop the first compressor, only opens 2-n compressor, work as water temperature
When changing in the range, matched load variation is carried by the plus-minus of unit；
3) as practical inflow temperature t22< t1≤t32When, stop First and the second compressor, only opens the compression of 3-n platform
Machine carries matched load variation by the plus-minus of unit when water temperature changes in the range；
And so on ...
4) as practical inflow temperature t(n-1)2< t1≤t2When, the n-th compressor is opened, when water temperature changes in the range, is led to
The plus-minus for crossing unit carries matched load variation；
5) when inflow temperature reaches t2At+1 DEG C, stop whole compressors.
2. the controlling party of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation according to claim 1
Method, it is characterised in that: each 4 compressor of high-temperature water water heat-pump hot-water unit band, design inlet water temperature degree are 15 DEG C, out water temperature
Degree is 60 DEG C；The corresponding hot side inflow temperature of first compressor is 15 DEG C, leaving water temperature is 28 DEG C, and the second compressor is corresponding
Hot side inflow temperature be 28 DEG C, leaving water temperature is 40 DEG C, the corresponding hot side inflow temperature of third compressor be 40 DEG C, water outlet
Temperature is 50 DEG C, and the corresponding hot side inflow temperature of the 4th compressor is 50 DEG C, leaving water temperature is 60 DEG C；
1) as practical inflow temperature t1At≤28 DEG C, whole compressors are opened, when water inlet temperature changes within the scope of 15 DEG C -28 DEG C,
Matched load variation is carried by the plus-minus of unit；
2) as 28 DEG C of < t of practical inflow temperature1At≤40 DEG C, 2-4 compressor is opened, when water temperature is within the scope of 28 DEG C -40 DEG C
When variation, matched load variation is carried by the plus-minus of unit；
3) as 40 DEG C of < t of practical inflow temperature1At≤50 DEG C, 3-4 compressor is opened, when water temperature is within the scope of 40 DEG C -50 DEG C
When variation, matched load variation is carried by the plus-minus of compressor；
4) as 50 DEG C of < t of practical inflow temperature1At≤60 DEG C, the 4th compressor is opened, when water temperature becomes within the scope of 50 DEG C -60 DEG C
When change, matched load variation is carried by the plus-minus of compressor；
5) when inflow temperature reaches 61 DEG C, stop whole compressors, unit is out of service.
3. the controlling party of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation according to claim 2
Method, it is characterised in that: 1) the point plus-minus load matched load variation by unit refers to: unit inflow temperature is 15
DEG C, leaving water temperature be 60 DEG C, the water-in and water-out temperature difference be 45 DEG C；When water temperature is higher than 15 DEG C, total water-in and water-out temperature difference becomes smaller than 45
DEG C, in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time, and unit operation at part load, inflow temperature is got over
Height, unit unloading are more；I.e. compared with eve time water temperature, water temperature height then unloads inlet water temperature, the low then unit load of water temperature
Operation；When water temperature is lower than 15 DEG C, required thermic load is greater than design heating load, compressor standard-sized sheet oepration at full load.
4. the controlling party of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation according to claim 2
Method, it is characterised in that: 2) the point plus-minus load matched load variation by unit refers to: 2-4 compressor is corresponding
Design water temperature be 28 DEG C -60 DEG C, design disengaging water temperature difference be 32 DEG C, when inlet water temperature be higher than 28 DEG C when, total water-in and water-out temperature difference
32 DEG C are become smaller than, in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time, unit operation at part load,
Inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with eve time water temperature, and water temperature height then unloads, and water temperature is low then
Unit load operating.
5. the controlling party of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation according to claim 2
Method, it is characterised in that: 3) the point plus-minus load matched load variation by unit refers to: 3-4 compressor is corresponding
Design water temperature be 40 DEG C -60 DEG C, design the water-in and water-out temperature difference be 20 DEG C, when inlet water temperature be higher than 40 DEG C when, design always into and out of
Water temperature difference becomes smaller than 20 DEG C, and in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time, and unit part is negative
Lotus operation, inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with eve time water temperature, and water temperature height then unloads, water
The low then unit load operating of temperature.
6. the controlling party of multi-compressor energy cascade utilization water-water heat pump Hot water units efficient operation according to claim 2
Method, it is characterised in that: 4) the point plus-minus load matched load variation by unit, refer to: the 4th compressor is corresponding
Designing water temperature is 50 DEG C -60 DEG C, and design disengaging water temperature difference is 10 DEG C, when inlet water temperature is higher than 50 DEG C, is designed always into and out of water temperature
Difference becomes smaller than 10 DEG C, and in the case where flow is constant, required thermic load becomes smaller, and unit unloads at this time, unit sub-load fortune
Row, inflow temperature is higher, and unit unloading is more；Inlet water temperature is compared with eve time water temperature, and water temperature height then unloads, and water temperature is low
Then unit load operating.
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| CN109140710B (en) * | 2018-08-24 | 2021-05-04 | 重庆美的通用制冷设备有限公司 | Modular air conditioning unit series-parallel connection identification method and device and electronic equipment |
| CN109812949B (en) * | 2019-02-22 | 2021-05-04 | 广东欧科空调制冷有限公司 | Load control method and device of multi-compressor unit and air conditioner |
| CN111121219A (en) * | 2019-12-28 | 2020-05-08 | 维克（天津）有限公司 | Air-cooled module machine loading and unloading control mode |
| CN113124531A (en) * | 2019-12-30 | 2021-07-16 | 青岛海尔空调电子有限公司 | Control method for automatically switching operation modes of water chilling unit |
| CN111795525B (en) * | 2020-07-17 | 2022-06-10 | 广东Tcl智能暖通设备有限公司 | Heat pump unit control method, control terminal and storage medium |
| CN114484935B (en) * | 2021-12-31 | 2023-09-26 | 青岛海尔空调电子有限公司 | Heat pump unit and control method and control device thereof |
| CN114440355A (en) * | 2022-01-25 | 2022-05-06 | 广东美的暖通设备有限公司 | Heat recovery indirect evaporative cooling device and heat recovery method |
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| CN102252399A (en) * | 2011-05-13 | 2011-11-23 | 珠海铨高机电设备有限公司 | Compressor energy regulating and controlling method of modular cold/hot water unit |
| CN202928187U (en) * | 2012-12-11 | 2013-05-08 | 浙江国祥空调设备有限公司 | A cold water and hot water air-conditioning unit employing series-flow evaporators |
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