CN102384551A - External-ice-melting-type ice cold storage refrigerating system and refrigerating method thereof - Google Patents

External-ice-melting-type ice cold storage refrigerating system and refrigerating method thereof Download PDF

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Publication number
CN102384551A
CN102384551A CN2011103162803A CN201110316280A CN102384551A CN 102384551 A CN102384551 A CN 102384551A CN 2011103162803 A CN2011103162803 A CN 2011103162803A CN 201110316280 A CN201110316280 A CN 201110316280A CN 102384551 A CN102384551 A CN 102384551A
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pipeline
ice
heat
chilled water
unit
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CN2011103162803A
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CN102384551B (en
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周必安
陈振乾
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Jiangsu colorful building environment Co., Ltd.
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JIANGSU QICAI TECHNOLOGY Co Ltd
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Abstract

The invention discloses an external-ice-melting-type ice cold storage refrigerating system and a refrigerating method thereof, and relates to the technical field of refrigerating air conditioners. The system comprises a refrigerating unit, a tail end device, an ice-making unit, a heat exchanging device and an ice storage groove, wherein the ice storage groove is internally provided with a heat exchanger; an evaporator of the ice-making unit is connected with the heat exchanger of the ice storage groove through a pipeline loop; the ice storage groove is connected with a cold fluid channel of the heat exchanging device through the pipeline loop; a hot fluid channel in the heat exchanging device is connected with the loop of the tail end device through a pipeline; the loop between a condenser of the ice-making unit and the evaporator of the refrigerating unit is provided with the pipeline, and the pipeline is provided with a circulation pump and a control valve correspondingly; and the cooling water of the condenser of the ice-making unit is pre-cooled to 2-20 DEC C for supplying by the refrigerating unit. According to the invention, the problems that a normal refrigerating unit can not operate under the ice-making working condition, and an air cooled ice-making unit has great compression ratio, high cost, and is complex to control and the like are solved, the cost of the refrigerating system can be lowered, and the ice-making efficiency and operation stability are improved.

Description

External-melting type ice regenerative cooling system and refrigerating method thereof
Technical field
The present invention relates to refrigeration technology field, particularly the refrigeration and air-conditioning technical field.
Background technology
Conventional refrigeration system generally is made up of refrigeration plant, low-temperature receiver device, end equipment, auxiliary equipment, connecting line and control system etc.Using the widest refrigeration plant is the vapor compression refrigerator group, connects into loop by evaporimeter, compressor, condenser, throttling arrangement through copper pipe, fills cold-producing medium in the loop.Refrigeration unit when work, cold-producing medium in evaporimeter, compressor, condenser, throttling arrangement, circulate evaporate, compression, condensation, four processes of throttling, heat is transferred to condenser from evaporimeter.
In the typical refrigeration system, refrigeration unit is a water-cooled cold water refrigeration unit---promptly be media discharge heat and the refrigeration unit of carrying cold with water; The low-temperature receiver device is a cooling tower; End equipment is fan coil or air-treatment unit.
The evaporimeter of refrigeration unit and end equipment are formed the chilled water closed circuit through pipeline and water pump.Chilled water is transported in the evaporimeter by water pump; Absorbed heat and be cooled to about 7 ℃ by cold-producing medium; Be transported to heat that end equipment absorbs room air to reduce indoor air temperature through pipeline; Chilled water then rises to about 12 ℃ because of absorbing room air heat temperature, again through in pipeline and the water pump Returning evaporimeter.
The condenser of refrigeration unit and cooling tower are formed cooling water circulation loop through pipeline and water pump.Cooling water is transported in the condenser by water pump, and the heat of absorption refrigeration agent and being heated to about 37 ℃ is transported in the cooling tower through pipeline, is cooled to about 32 ℃ to the outdoor air heat radiation through cooling tower, again through in pipeline and the return condensed device of water pump.
Except mode through cooling tower, also have water-cooled cold water refrigeration unit through the mode discharges heat of ground pipe laying, underground water, surface water, these water-cooled cold water refrigeration unit are also referred to as earth source heat pump unit, water source heat pump units.
Except being the media discharge heat with water, also having with the air is the refrigeration unit of media discharge heat, and this refrigeration unit is called wind-cooled cold-water unit or net for air-source heat pump units.
Above refrigeration unit is in when refrigeration, and the leaving water temperature of chilled water but also can be about 18 ℃ generally about 7 ℃; In any case, because of its temperature all far above 0 ℃, can not ice making, so be called conventional refrigeration unit.
The shortcoming of the conventional refrigeration system of forming with conventional refrigeration unit is:
1, for ensureing the air-conditioning refrigeration duty cooling of peak period, the capacity of refrigeration unit must satisfy the peak value refrigeration duty, causes installed capacity excessive, has increased the initial cost of equipment; And system's most of the time is all moved under sub-load, has also reduced the operational efficiency and the utilization rate of equipment;
2, be not suitable for the part period and need the Air-conditioning Engineering of subsequent use refrigerating capacity;
3, be not suitable for to provide low-temperature cold water maybe need adopt the Air-conditioning Engineering of cold air distribution;
4, be not suitable for the Air-conditioning Engineering that power capacity or supply of electric power are restricted;
5, air-conditioning refrigeration duty peak overlaps with electrical network peak period, has aggravated the tensity of mains supply.
Existing ice cold-storage Refrigeration Technique, the phase-change characteristic of utilization ice and water, period low at network load, that electricity price is cheap such as night, electricity consumption makes refrigerating device refrigeration, through the mode of ice making, is that main form stores in ice with the latent heat of phase change with cold; And high at network load, that electricity price is expensive period such as daytime, the mode through ice-melt discharges the cold that stores in the ice, to satisfy air conditioning or production technology with cold demand.
Existing ice regenerative cooling system is made up of refrigeration plant, ice-storage equipment, refrigerating medium, refrigerating medium-chilled water heat exchanger, low-temperature receiver device, end equipment, auxiliary equipment, connecting line and control system etc., can realize ice-reserving, ice-reserving cooling, the independent cooling of refrigeration plant, the independent cooling of ice storage unit, ice storage unit and five kinds of operational modes of refrigeration plant associating cooling simultaneously.
The refrigeration plant of existing ice regenerative cooling system is generally duplexing condition refrigeration unit.
Identical with conventional refrigeration unit is, duplexing condition refrigeration unit also is the vapor compression refrigerator group, comprise through cooling tower, water-cooled unit and the air-cooled unit of the mode discharges heat through air of mode discharges heat of pipe laying, underground water, surface water.
Different with conventional refrigeration unit is that the operating condition of duplexing condition refrigeration unit has two kinds, i.e. cooling condition and ice making operating mode.When under cooling condition, moving, the refrigerating medium outlet temperature of duplexing condition refrigeration unit is the same with conventional refrigeration unit to be about 7 ℃; And when under the ice making operating mode, moving, the refrigerating medium outlet temperature of duplexing condition refrigeration unit then is-5 ℃~-15 ℃.
The shortcoming of duplex condition refrigeration unit is:
When 1, duplexing condition refrigeration unit was moved under the ice making operating mode, its refrigerating medium outlet temperature reduced by 12 ℃~22 ℃, 12 ℃~22 ℃ of the also corresponding reductions of its evaporating temperature than the chilled water leaving water temperature of conventional refrigeration unit.So that no matter in which way discharges heat, under the identical situation of condensation temperature, the compression ratio of the compressor of duplexing condition refrigeration unit is big more than conventional refrigeration unit all.Under the mode with modal cooling tower discharges heat, the leaving water temperature of the cooling water of refrigeration unit is about 37 ℃, and corresponding condensation temperature is about 42 ℃; The evaporating temperature of duplex condition refrigeration unit under the ice making operating mode is-10 ℃~-20 ℃, and the compression ratio of its compressor is 4.5~6.6; And the evaporating temperature of conventional refrigeration unit is about 2 ℃, and the compression ratio of compressor is merely about 3.0.And compression ratio is big more, and then Energy Efficiency Ratio is low more.Thereby in refrigeration, can both reach the duplexing condition refrigeration unit of high energy efficiency ratio under two kinds of operating modes of ice making, specification requirement is high, and technological requirement is high, and cost is expensive;
2, duplexing condition refrigeration unit need freeze, the alternate run of two kinds of operating modes of ice making; Even need freeze, the time operation of two kinds of operating modes of ice making; Every kind of operating mode all has the requirement of different cooling temperatures and cooling amount, makes refrigeration unit be difficult to reach and under all operating modes, move all to keep higher running efficiency and operation stability.Simultaneously, the control system of duplexing condition refrigeration unit is also very complicated, has further increased cost, and has increased fault rate.
When 3, duplexing condition refrigeration unit was moved under the ice making operating mode, evaporating temperature reduced by 12 ℃~22 ℃ than conventional refrigeration unit.And 1 ℃ of the every reduction of evaporating temperature, refrigerating capacity can reduce 2%~3%.Refrigerating capacity when therefore, duplexing condition refrigeration unit is moved under the ice making operating mode can reduce 24%~66%.
Therefore, adopt the ice regenerative cooling system of duplexing condition refrigeration unit, system cost is high, when particularly existing conventional refrigeration system being iced the cold-storage transformation, needs with the expensive existing conventional refrigeration unit of duplexing condition refrigeration unit replacement.And conventional refrigeration unit existing, the ability operate as normal promptly goes out of use, and causes serious waste.In addition, also there are system pipeline complicacy, system's control complicated problems.
Summary of the invention
The object of the invention is to design a kind of reduction refrigeration system cost, improves the ice regenerative cooling system of ice making efficient and operation stability.
The end equipment that the present invention includes refrigeration unit, is communicated with through the first pipeline loop with the evaporimeter of refrigeration unit; Also comprise ice making unit, heat-exchanger rig, Ice Storage Tank; Heat exchanger is set in Ice Storage Tank; The evaporimeter of said ice making unit is connected through the second pipeline loop with the interior heat exchanger of Ice Storage Tank, and said Ice Storage Tank is connected through the 3rd pipeline loop with the cold fluid pass of heat-exchanger rig; Zone of heat liberation in the said heat-exchanger rig is connected with the end equipment loop through the 4th pipeline; On said each pipeline, circulating pump and control valve are set respectively; It is characterized in that: loop is provided with the 5th pipeline between the condenser of ice making unit and the evaporimeter of refrigeration unit, on said the 5th pipeline, corresponding circulating pump and control valve is set.
The present invention has overcome problems such as conventional refrigeration unit can not be worked, air-cooled ice making unit compression ratio is big, cost is high, control complicacy under the ice making operating mode, can reduce the refrigeration system cost, improves ice making efficient and operation stability.
The concrete technical scheme of the present invention can be: the evaporimeter of first chilled water pump, refrigeration unit is connected through first pipeline loop successively with end equipment; The side connects the 4th pipeline on first pipeline between the device and first chilled water pump endways; The other end of said the 4th pipeline is other to be connected on first pipeline between the evaporimeter of said end equipment and said refrigeration unit, on said the 4th pipeline, is connected in series the zone of heat liberation of second chilled water pump and heat-exchanger rig; The cold fluid pass of said heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected through the mutual loop of the 3rd pipeline; The evaporimeter of said heat exchanger, coolant pump and ice making unit is connected through the mutual loop of second pipeline; Other the 5th pipeline that connects on the pipeline that the evaporator outlet of said refrigeration unit connects; The other end of said the 5th pipeline is other to be connected on the pipeline that is connected with the said first chilled water pump import; The condenser and first valve of serial connection ice making unit are provided with second valve on first pipeline between said the 5th pipeline and the said end equipment on said the 5th pipeline.
The function of the duplexing condition refrigeration unit of prior art is cut apart in the present invention, is carried out various combinations and is realized by conventional refrigeration unit and two groups of refrigeration unit of ice making unit.Under the ice making operating mode, carry out ice making by two groups of refrigeration unit associated working---the chilled water the supply system ice maker group that conventional refrigeration unit is produced is to make its cooling water, and the ice making unit is the refrigerating medium ice making that the low-temperature receiver device is produced with conventional refrigeration unit then; And the compression ratio of every group of refrigeration unit is all much smaller than existing duplexing condition refrigeration unit.Under cooling condition, then work independently and freeze by conventional refrigeration unit.The present invention has reduced the cost of ice regenerative cooling system, particularly when existing conventional refrigeration system being iced the cold-storage transformation, can utilize existing conventional refrigeration unit, avoids waste.Simultaneously, also simplify the pipeline and the control of ice regenerative cooling system, improved the efficient of ice regenerative cooling system.
The 3rd chilled water pump of the present invention can be the unsteady flow amount chilled water pump of modes such as frequency conversion; Can regulate the flow of the refrigerating medium of the cold fluid pass that gets into heat-exchanger rig easily; Improve heat exchanger effectiveness; The supply water temperature of the zone of heat liberation of control heat-exchanger rig is to satisfy the demand that end equipment changes refrigeration duty.
The present invention also can connect the 6th pipeline between the 3rd pipeline at the cold fluid pass two ends of said connection heat-exchanger rig; Serial connection the 3rd valve is connected in series the 4th valve on the 3rd pipeline between the cold fluid pass of said the 6th pipeline and said heat-exchanger rig on said the 6th pipeline.Get into the flow of refrigerating medium of the cold fluid pass of heat-exchanger rig through the same scalable of third and fourth valve, improve heat exchanger effectiveness, the supply water temperature of the zone of heat liberation of control heat-exchanger rig is to satisfy the demand that end equipment changes refrigeration duty.
The present invention also can connect the 6th pipeline between the 3rd pipeline at the cold fluid pass two ends of said connection heat-exchanger rig, mouthful be connected in series a three-way valve crossing of said the 6th pipeline and the 3rd pipeline.Also can regulate the flow of the refrigerating medium of the cold fluid pass that gets into heat-exchanger rig through three-way valve, improve heat exchanger effectiveness, the supply water temperature of the zone of heat liberation of control heat-exchanger rig is to satisfy the demand that end equipment changes refrigeration duty.
The present invention also can connect the 6th pipeline between the 3rd pipeline at said connection Ice Storage Tank two ends, serial connection the 3rd valve on said the 6th pipeline, and on the 3rd pipeline between said the 6th pipeline and the said Ice Storage Tank, be connected in series the 4th valve.Get into the flow of refrigerating medium of the cold fluid pass of heat-exchanger rig through third and fourth valve regulated, improve heat exchanger effectiveness, the supply water temperature of the zone of heat liberation of control heat-exchanger rig satisfies the demand that end equipment changes refrigeration duty.
In like manner, the present invention also can connect the 6th pipeline between the 3rd pipeline at said connection Ice Storage Tank two ends, is connected in series a three-way valve at said the 6th pipeline and the 3rd pipeline mouth that crosses.Get into the flow of refrigerating medium of the cold fluid pass of heat-exchanger rig through the three-way valve scalable, improve heat exchanger effectiveness, the supply water temperature of the zone of heat liberation of control heat-exchanger rig satisfies the demand that end equipment changes refrigeration duty.
Another purpose of the present invention is to propose the method that adopts above ice regenerative cooling system to freeze:
The cooling water of the condenser of ice making unit is by supplying with behind refrigeration unit precooling to 2~20 ℃.
The invention has the beneficial effects as follows:
One, improves ice making efficient, reduce the cost of ice making unit
Ice making unit of the present invention adopts 2~20 ℃ chilled water that conventional refrigeration unit supplies as its cooling water; Its corresponding condensation temperature is 12~30 ℃; Condensation temperature (42 ℃) than existing duplexing condition refrigeration unit descends 12~30 ℃; Make the corresponding decline of condensing pressure of ice making unit, the compression ratio of ice making unit is compared existing duplexing condition refrigeration unit and has been descended 25.96%~55.10% as a result, thereby the Energy Efficiency Ratio that has improved the ice making unit greatly is an operational efficiency; Simultaneously, also greatly reduce the specification requirement and the technological requirement of ice making unit, make ice machine form this and greatly reduce.
Two, improve the operation stability of ice making unit, simplify the control of ice making unit
Ice making unit of the present invention is only with a kind of operating mode work of ice making, and it is constant that its evaporating temperature and delivery temperature all keep, and need not frequent adjusting, improved the operation stability of ice making unit greatly.Simultaneously, the control of ice making unit is simplified greatly, has further reduced the cost and the fault rate of ice making unit.
Three, improve the refrigerating capacity of ice making unit, reduce the installed capacity of ice making unit in the ice regenerative cooling system
As everyone knows, 1 ℃ of the every reduction of the condensation temperature of refrigeration unit, its refrigerating capacity can improve 1.5%.The condensation temperature of ice making unit of the present invention is 12~30 ℃, descends 12~30 ℃ than the condensation temperature (42 ℃) of existing duplexing condition refrigeration unit, and the refrigerating capacity of ice making unit can improve 18%~45%; Accordingly, also significantly reduced the installed capacity of ice making unit in the ice regenerative cooling system.
Four, reduce the cost of ice regenerative cooling system
Refrigeration unit of the present invention, no matter the ice making unit still is conventional refrigeration unit, and cost all is significantly less than existing duplexing condition refrigeration unit.Under the identical situation of total refrigeration duty, the totle drilling cost of two groups of refrigeration unit of the present invention still obviously reduces than the cost of duplexing condition refrigeration unit, thereby has reduced the cost of ice regenerative cooling system.
Five, the composition of ice regenerative cooling system and operation are more flexible
Ice regenerative cooling system of the present invention is made up of ice making unit and conventional refrigeration unit, and refrigeration duty is born by ice making unit and conventional refrigeration unit jointly.The present invention can be free, neatly assignment system ice maker group and conventional refrigeration unit share refrigeration duty separately ratio to adapt to the refrigeration duty of various different situations, improved the flexibility that the ice regenerative cooling system forms and the flexibility of operation greatly.
Six, simplify the pipeline and the control of ice regenerative cooling system
Ice regenerative cooling system of the present invention is divided into ice making, refrigeration two parts, and conventional refrigeration unit is only with a kind of operating mode work of freezing, and the ice making unit is only with a kind of operating mode work of ice making, thus the pipeline of simplification system and the control of system.
Seven, reduce the cost of existing conventional refrigeration system being iced the cold-storage transformation
The refrigerating capacity of the conventional refrigeration unit of conventional refrigeration system is based on and satisfies day peak load configuration, and the refrigeration duty at night more than day peak load low, so the refrigerating capacity at conventional refrigeration unit night is much larger than the refrigeration duty at night.When existing conventional refrigeration system being iced the cold-storage transformation, only need the very little ice making unit of allocating power, get final product the technical scheme of embodiment of the present invention, can satisfy the refrigeration duty of ice making, made full use of conventional refrigeration unit refrigerating capacity more than needed at night again; Need not the more duplexing condition refrigeration unit of costliness is discarded and acquired to conventional refrigeration unit existing, the ability operate as normal, greatly reduced existing conventional refrigeration system is iced the cost that cold-storage is transformed.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is second kind of structural representation of the present invention.
Fig. 3 is the third structural representation of the present invention.
Fig. 4 is the 4th a kind of structural representation of the present invention.
Fig. 5 is the 5th a kind of structural representation of the present invention.
The specific embodiment
One, embodiment one:
As shown in Figure 1, the evaporimeter 1-2 that the present invention includes refrigeration unit 1, end equipment 3, first chilled water pump, 2, the first chilled water pumps 2, refrigeration unit 1 is connected through first pipeline 4 loop successively with end equipment 3.
Install other the 4th pipeline 5 that connects on first pipeline 4 between 3 and first chilled water pump 2 endways; The other end of the 4th pipeline 5 is other to be connected on first pipeline 4 between the evaporimeter 1-2 of end equipment 3 and refrigeration unit 1 the zone of heat liberation 7-1 of serial connection second chilled water pump 6 and heat-exchanger rig 7 on the 4th pipeline 5.
The cold fluid pass 7-2 of heat-exchanger rig 7, (frequency conversion type) the 3rd chilled water pump 8 and Ice Storage Tank 9 are connected through the 3rd pipeline 10 loops.
The evaporimeter 13-1 of the heat exchanger 11 in Ice Storage Tank 9, coolant pump 12 and ice making unit 13 is connected through second pipeline, 14 loops.
Other the 5th pipeline 15 that connects on the pipeline that the evaporimeter 1-2 of refrigeration unit 1 outlet connects; The other end of the 5th pipeline 15 is other to be connected on the pipeline that is connected with 2 imports of first chilled water pump, the condenser 13-2 and first valve 17 of serial connection ice making unit 13 on the 5th pipeline 15.
On first pipeline 4 between the 5th pipeline 15 and the end equipment 3, be connected second valve 16.
Through above connection, form:
1, chilled water circuit: Ice Storage Tank 9, the 3rd chilled water pump 8, heat-exchanger rig 7 are connected into a loop through chilled water tube connector;
2, secondary chilled water circuit: the condenser 13-2 of the evaporimeter 1-2 of first chilled water pump 2, second chilled water pump 6, refrigeration unit 1, ice making unit 13, first valve 17, second valve 16, end equipment 3 (as: fan coil) are connected into loop through secondary chilled water tube connector;
3, refrigerating medium loop: evaporimeter 13-1, the Ice Storage Tank 9 inner coil pipe heat exchangers 11 of coolant pump 12, ice making unit 13 are connected into a loop through the refrigerating medium tube connector.
The present invention can realize plurality of operating modes:
1, ice-reserving pattern:
Second valve 16 is closed, and the 3rd chilled water pump 8, second chilled water pump 6 are out of service.
First valve 17 is opened, first chilled water pump 2, coolant pump 12 operations, refrigeration unit 1, the 13 start operations of ice making unit.
The cooling water of the condenser 13-2 of ice making unit 13 is by supplying with after refrigeration unit 1 precooling to 2~20 ℃.
Chilled water circuit: chilled water behind the absorption cold, flows into the condenser 13-2 of ice making unit 13 through the evaporimeter 1-2 of first chilled water pump, 2 input refrigeration unit 1, behind the released cold quantity, returns first chilled water pump 2 through first valve 17 again, gets into next circulation.
Refrigerating medium loop: refrigerating medium behind the absorption cold, flows into the heat exchanger 11 in the Ice Storage Tank 9 through the evaporimeter 13-1 of coolant pump 12 input ice making units 13, after the released cold quantity ice making, returns coolant pump 12, gets into next circulation.
2, ice-reserving while cooling pattern:
First valve 17, second valve 16 are opened; First chilled water pump 2, coolant pump 12 operations; Refrigeration unit 1, the 13 start operations of ice making unit.
The 3rd chilled water pump 8, second chilled water pump 6 are out of service.
The cooling water of the condenser 13-2 of ice making unit 13 is by supplying with after refrigeration unit 1 precooling to 2~20 ℃.
Chilled water circuit: chilled water is through the evaporimeter 1-2 of first chilled water pump, 2 input refrigeration unit 1, and behind the absorption cold, a part flows into the condenser 13-2 of ice making unit 13, behind the released cold quantity, returns first chilled water pump 2 through first valve 17 again, gets into next circulation; Another part then flows into end equipment 3 coolings, behind the released cold quantity, returns first chilled water pump 2 through second valve 16 again, gets into next circulation.
Refrigerating medium loop: refrigerating medium behind the absorption cold, flows into the heat exchanger 11 in the Ice Storage Tank 9 through the evaporimeter 13-1 of coolant pump 12 input ice making units 13, after the released cold quantity ice making, returns coolant pump 12, gets into next circulation.
3, the independent cooling pattern of conventional unit:
Second valve 16 is opened; 2 operations of first chilled water pump; Refrigeration unit 1 start operation;
First valve 17 is closed; (frequency conversion) the 3rd chilled water pump 8, second chilled water pump 6, coolant pump 12 are out of service; Ice making unit 13 is shut down.
Chilled water behind the absorption cold, flows into end equipment 3 coolings through first chilled water pump, 2 input refrigeration unit, 1 evaporimeter 1-2, behind the released cold quantity, through 16 times first chilled water pumps 2 of second valve, gets into next circulation again.
4, the independent cooling pattern of Ice Storage Tank:
Second valve 16 is opened; (frequency conversion) the 3rd chilled water pump 8,6 operations of second chilled water pump;
First valve 17 is closed; First chilled water pump 2, coolant pump 12 are out of service; Refrigeration unit 1, ice making unit 13 are shut down.
A chilled water circuit: a chilled water flows into Ice Storage Tank 9 behind the cold fluid pass 7-2 released cold quantity of the 3rd chilled water pump 8 input heat-exchanger rigs 7, behind the absorption cold, return the 3rd chilled water pump 8, gets into next circulation.
The 3rd chilled water pump 8 (frequency conversion) regulating frequency, adjusting gets into the chilled-water flow of the cold fluid pass 7-2 of heat-exchanger rig 7, with the temperature of the secondary chilled water among the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
The secondary chilled water circuit: the secondary chilled water flows into end equipment 3 coolings after the zone of heat liberation 7-1 of second chilled water pump, 6 input heat-exchanger rigs 7 absorbs cold, behind the released cold quantity, through second valve 16, return second chilled water pump 6 again, gets into next circulation.
5, Ice Storage Tank and conventional unit associating cooling pattern:
Second valve 16 is opened, (frequency conversion) the 3rd chilled water pump 8, first chilled water pump 2,6 operations of second chilled water pump; Refrigeration unit 1 start operation.
First valve 17 is closed, and coolant pump 12 is out of service, and ice making unit 13 is shut down.
A chilled water circuit: a chilled water flows into Ice Storage Tank 9 behind the cold fluid pass 7-2 released cold quantity of the 3rd chilled water pump 8 input heat-exchanger rigs 7, behind the absorption cold, return the 3rd chilled water pump 8, gets into next circulation;
The 3rd chilled water pump 8 regulating frequencies, adjusting gets into the chilled-water flow of the cold fluid pass 7-2 of heat-exchanger rig 7, with the temperature of the secondary chilled water among the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
The secondary chilled water circuit: a part of secondary chilled water is after the zone of heat liberation 7-1 of second chilled water pump, 6 input heat-exchanger rigs 7 absorbs cold; Flow into end equipment 3 coolings, behind the released cold quantity, again through second valve 16; Return second chilled water pump 6, get into next circulation; Another part secondary chilled water behind the absorption cold, flows into end equipment 3 coolings through first chilled water pump, 2 input refrigeration unit, 1 evaporimeter 1-2, behind the released cold quantity, through second valve 16, returns first chilled water pump 2 again, gets into next circulation.
Two, embodiment two:
As shown in Figure 2, the 3rd chilled water pump 8 is common chilled water pump in this example, other with embodiment one.
In addition; Between the 3rd pipeline 10 at the cold fluid pass 7-2 two ends that connect heat-exchanger rig 7, connect the 6th pipeline 19; Serial connection the 3rd valve 20 is connected in series the 4th valve 21 on the 3rd pipeline 10 between the cold fluid pass 7-2 of the 6th pipeline 19 and heat-exchanger rig 7 on the 6th pipeline 19.
Regulate the chilled-water flow of the cold fluid pass 7-2 that gets into heat-exchanger rigs 7 through the 3rd valve 20, the 4th valve 21, with the secondary chilled water temperature among the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Three, embodiment three:
As shown in Figure 3, the 3rd chilled water pump 8 is common chilled water pump in this example, other with embodiment one.
In addition, between the 3rd pipeline 10 at the cold fluid pass 7-2 two ends that connect heat-exchanger rig 7, connect the 6th pipeline 19, be connected in series a three-way valve 20 with the mouth that crosses of the 3rd pipeline 10 at the 6th pipeline 19.
Regulate the chilled-water flow of the cold fluid pass 7-2 that gets into heat-exchanger rigs 7 through three-way valve 20, with the secondary chilled water temperature among the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Four, embodiment four:
As shown in Figure 4, the 3rd chilled water pump 8 is common chilled water pump in this example, other with embodiment one.
In addition, between the 3rd pipeline 10 that connects Ice Storage Tank 9 two ends, connect the 6th pipeline 19, serial connection the 3rd valve 20 on the 6th pipeline 19, and on the 3rd pipeline 10 between the 6th pipeline 19 and the Ice Storage Tank 9, be connected in series the 4th valve 21.
Regulate the chilled water temperature of the cold fluid pass 7-2 that gets into heat-exchanger rigs 7 through the 3rd valve 20, the 4th valve 21, with the secondary chilled water temperature among the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.
Five, embodiment five:
As shown in Figure 5, the 3rd chilled water pump 8 is common chilled water pump in this example, other with embodiment one.
In addition, between the 3rd pipeline 10 that connects Ice Storage Tank 9 two ends, connect the 6th pipeline 19, be connected in series a three-way valve 20 with the mouth that crosses of the 3rd pipeline 10 at the 6th pipeline 19.
Regulate the chilled water temperature of the cold fluid pass 7-2 that gets into heat-exchanger rigs 7 through three-way valve 20, with the secondary chilled water temperature among the zone of heat liberation 7-1 that regulates heat-exchanger rig 7.

Claims (8)

1. external-melting type is iced regenerative cooling system; The end equipment that comprises refrigeration unit, is communicated with through the first pipeline loop with the evaporimeter of refrigeration unit; Also comprise ice making unit, heat-exchanger rig, Ice Storage Tank; Heat exchanger is set in Ice Storage Tank, and the evaporimeter of said ice making unit is connected through the second pipeline loop with the interior heat exchanger of Ice Storage Tank, and said Ice Storage Tank is connected through the 3rd pipeline loop with the cold fluid pass of heat-exchanger rig; Zone of heat liberation in the said heat-exchanger rig is connected with the end equipment loop through the 4th pipeline; On said each pipeline, circulating pump and control valve are set respectively; It is characterized in that: loop is provided with the 5th pipeline between the condenser of ice making unit and the evaporimeter of refrigeration unit, on said the 5th pipeline, corresponding circulating pump and control valve is set.
2. according to the said external-melting type ice of claim 1 regenerative cooling system, it is characterized in that: the evaporimeter of first chilled water pump, refrigeration unit is connected through first pipeline loop successively with end equipment; Other the 4th pipeline that connects on first pipeline between the said end equipment and first chilled water pump; The other end of said the 4th pipeline is other to be connected on first pipeline between the evaporimeter of said end equipment and said refrigeration unit, on said the 4th pipeline, is connected in series the zone of heat liberation of second chilled water pump and heat-exchanger rig; The cold fluid pass of said heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected through the 3rd pipeline loop; The evaporimeter of said heat exchanger, coolant pump and ice making unit is connected through the second pipeline loop; Other the 5th pipeline that connects on the pipeline that the evaporator outlet of said refrigeration unit connects; The other end of said the 5th pipeline is other to be connected on the pipeline that is connected with the said first chilled water pump import; The condenser and first valve of serial connection ice making unit are provided with second valve on first pipeline between said the 5th pipeline and the said end equipment on said the 5th pipeline.
3. according to the said external-melting type ice of claim 2 regenerative cooling system, it is characterized in that said the 3rd chilled water pump is for becoming the flow-type chilled water pump.
4. according to the said external-melting type ice of claim 2 regenerative cooling system; It is characterized in that between the 3rd pipeline at the cold fluid pass two ends of said connection heat-exchanger rig, connecting the 6th pipeline; Serial connection the 3rd valve is connected in series the 4th valve on the 3rd pipeline between the cold fluid pass of said the 6th pipeline and said heat-exchanger rig on said the 6th pipeline.
5. according to the said external-melting type ice of claim 2 regenerative cooling system; It is characterized in that between the 3rd pipeline at the cold fluid pass two ends of said connection heat-exchanger rig, connecting the 6th pipeline, mouthful be connected in series a three-way valve crossing of said the 6th pipeline and the 3rd pipeline.
6. according to the said external-melting type ice of claim 2 regenerative cooling system; It is characterized in that between the 3rd pipeline at said connection Ice Storage Tank two ends, connecting the 6th pipeline; Serial connection the 3rd valve on said the 6th pipeline, and on the 3rd pipeline between said the 6th pipeline and the said Ice Storage Tank, be connected in series the 4th valve.
7. according to the said external-melting type of claim 2 ice regenerative cooling system, it is characterized in that between the 3rd pipeline at said connection Ice Storage Tank two ends, connecting the 6th pipeline, crossing at said the 6th pipeline and the 3rd pipeline mouthful is connected in series a three-way valve.
8. method of using the ice of external-melting type according to claim 1 regenerative cooling system to freeze is characterized in that: the cooling water of the condenser of ice making unit is supplied with by behind refrigeration unit precooling to 2~20 ℃.
CN201110316280.3A 2011-10-18 2011-10-18 External-ice-melting-type ice cold storage refrigerating system and refrigerating method thereof Expired - Fee Related CN102384551B (en)

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CN105276733A (en) * 2015-11-09 2016-01-27 上海建筑设计研究院有限公司 Data computer room cooling system and cooling method thereof
CN110332632A (en) * 2019-05-30 2019-10-15 苏州苏暖新能源节能技术服务有限公司 Direct evaporating ice-storage refrigerating system

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