CN103743145A - Double-energy-source parallel indirect refrigeration system and double-energy-source parallel indirect refrigeration method - Google Patents
Double-energy-source parallel indirect refrigeration system and double-energy-source parallel indirect refrigeration method Download PDFInfo
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Abstract
The invention discloses a double-energy-source parallel indirect refrigeration system and a double-energy-source parallel indirect refrigeration method, and belongs to the field of energy conservation of refrigeration systems applicable to cold processing and low-temperature storage for food. By the aid of the double-energy-source parallel indirect refrigeration system and the double-energy-source parallel indirect refrigeration method, the problem of high power consumption of an existing refrigeration system due to the fact that existing natural cold energy cannot be applied to the existing refrigeration system can be solved. The double-energy-source parallel indirect refrigeration system is additionally provided with a refrigerant pump and an outdoor heat exchanger on the basis of an existing refrigeration system; the outdoor heat exchanger is serially connected between a plate heat exchanger of the existing refrigeration system and a gas and liquid separator; the double-energy-source parallel indirect refrigeration system further comprises a temperature controller, a first electromagnetic valve and a second electromagnetic valve; the first electromagnetic valve is arranged between an outlet of a second output pipeline of the plate heat exchanger and an inlet of the refrigerant pump, the second electromagnetic valve is arranged between the outlet of the second output pipeline of the plate heat exchanger and an inlet of a first input pipeline of the gas and liquid separator, and the temperature controller is used for acquiring the outdoor temperature and respectively transmitting control signals to a control end of the first electromagnetic valve and a control end of the second electromagnetic valve. The double-energy-source parallel indirect refrigeration system and the double-energy-source parallel indirect refrigeration method are used for cold processing and low-temperature storage for food.
Description
Technical field
The invention belongs to a kind of refrigeration system energy-saving field that is applicable to food cold processing and cryopreservation.
Background technology
Because refrigeration system can provide the cold environment of different temperatures, therefore, in the process of food, medicine etc., be widely used.Refrigeration system power consumption is large, and especially as the compressor that drives kind of refrigeration cycle, its power consumption is outstanding.The power consumption of single compressor is little of tens kilowatts, arrives greatly hundreds of kilowatt, makes the power consumption of compressor account for the more than 80% of whole refrigeration system power consumption.
Northern area is very long winter, and outdoor temperature is low.Cold energy resource contained in Cryogenic air is very extensive, and this cold energy resource is clean, pollution-free.According to northern area temperature and the energy characteristics in winter, find the method for utilizing of suitable cold energy resource, be the important topic of current refrigeration system energy-saving field.
The refrigeration system that domestic food cold working and cryopreservation link adopt is generally traditional electric refrigeration system, and relying on the great compressor of power consumption is driving force, produces low temperature environment, meets cold worked temperature requirement.This refrigeration system is according to cold worked ability difference, and the power consumption of the compressor adopting is also different, and tens kilowatts at least, hundreds of kilowatt at most, therefore power consumption is very large.In addition, to winter, the utilization of outdoor Cryogenic air is mainly direct by outdoor cold air drawing-in system, and this method is only applied to the link of cryopreservation, and has certain limitation.The first, the cold air amount of introducing is uncontrollable, causes the temperature height of storage environment indefinite, and off-design temperature is excessive, causes the variation of preserved object quality; The second, outdoor cold air generally relies on the approach such as door capable of being opened, ventilation shaft to be introduced into refrigerator, therefore cold skewness, and the as easy as rolling off a log local temperature that causes is too low, and preserved object quality is produced to harmful effect.
Summary of the invention
The present invention cannot be applied in refrigeration system in order to solve existing natural cold-energy, causes the problem that refrigeration system power consumption is large, the invention provides a kind of Dual-energy source indirect refrigeration system in parallel and method.
Dual-energy source indirect refrigeration system in parallel, it comprises compressor, condenser, gas-liquid separator, plate type heat exchanger, choke valve and water pump, it also comprises refrigerated medium pump and outdoor heat exchanger;
The second output channel outlet of described plate type heat exchanger is communicated with the entrance of refrigerated medium pump, this cold-producing medium delivery side of pump is communicated with the entrance of outdoor heat exchanger, the first input channel entrance of gas-liquid separator is communicated with the outlet of outdoor heat exchanger, the first output channel outlet of described gas-liquid separator is communicated with the input channel entrance of condenser by compressor, the output channel outlet of condenser is communicated with the second input channel entrance of gas-liquid separator through choke valve, the second output channel outlet of gas-liquid separator is communicated with the first input channel entrance of plate type heat exchanger, the first output channel outlet of plate type heat exchanger is communicated with the entrance of water pump, this water delivery side of pump is communicated with the refrigeration piping entrance of refrigeration object, the refrigeration piping outlet of this refrigeration object is communicated with the second input channel entrance of plate type heat exchanger.
Described Dual-energy source indirect refrigeration system in parallel, it also comprises temperature controller, No. 1 magnetic valve and No. 2 magnetic valves,
No. 1 described magnetic valve is arranged between the second output channel outlet and the entrance of refrigerated medium pump of plate type heat exchanger,
No. 2 magnetic valve is arranged between the second output channel outlet and the first input channel entrance of gas-liquid separator of plate type heat exchanger,
Described temperature controller is used for gathering outdoor temperature, and transmits control signal respectively to the control end of No. 1 magnetic valve and the control end of No. 2 magnetic valves.
Dual-energy source indirect refrigeration method in parallel, the method realizes based on following refrigeration system, and this refrigeration system comprises compressor, condenser, gas-liquid separator, plate type heat exchanger, outdoor heat exchanger, choke valve, water pump, temperature controller, refrigerated medium pump, No. 1 magnetic valve and No. 2 magnetic valves;
The second output channel outlet of described plate type heat exchanger is communicated with the entrance of refrigerated medium pump through No. 2 magnetic valves, this cold-producing medium delivery side of pump is communicated with the entrance of outdoor heat exchanger, the second output channel outlet of described plate type heat exchanger is also communicated with the first input channel entrance of gas-liquid separator by No. 1 magnetic valve, and the first input channel entrance of this gas-liquid separator is communicated with the outlet of outdoor heat exchanger, the first output channel outlet of described gas-liquid separator is communicated with the input channel entrance of condenser by compressor, the output channel outlet of condenser is communicated with the second input channel entrance of gas-liquid separator through choke valve, the second output channel outlet of gas-liquid separator is communicated with the first input channel entrance of plate type heat exchanger, the first output channel outlet of plate type heat exchanger is communicated with the entrance of water pump, this water delivery side of pump is communicated with the refrigeration piping entrance of refrigeration object, the refrigeration piping outlet of this refrigeration object is communicated with the second input channel entrance of plate type heat exchanger,
Described temperature controller is used for gathering outdoor temperature, and transmits control signal respectively to the control end of No. 1 magnetic valve and the control end of No. 2 magnetic valves;
The specific implementation process of the method is, when outdoor temperature is when being more than or equal to 0 ℃, No. 1 magnetic valve of temperature controller control is opened, No. 2 closed electromagnetic valves, and in plate type heat exchanger, cold-producing medium flows in gas-liquid separator by No. 1 magnetic valve, cold-producing medium is sucked by compressor by gas-liquid separator, cold-producing medium, after compressor compression, is discharged into condenser and carries out condensation, and then after choke valve enters gas-liquid separator, flow in plate type heat exchanger and carry out exchange heat with chilled water
When outdoor temperature drops to below 0 ℃, No. 1 closed electromagnetic valve of temperature controller control, No. 2 magnetic valve is opened, after in plate type heat exchanger, cold-producing medium pressurizes by cooled dose of pump of No. 2 magnetic valves, enter in outdoor heat exchanger and carry out heat release, the cold-producing medium after cooling is got back to gas-liquid separator, by the second output channel of gas-liquid separator, enters in plate type heat exchanger, and carry out exchange heat with the chilled water in this plate type heat exchanger
After cooled dose of cooling of chilled water in plate type heat exchanger, through water pump pressurization, cooling object is lowered the temperature.
Dual-energy source of the present invention indirect refrigeration system in parallel and method have been utilized the weather of northern area cold in winter, by in the air drawing-in system of low temperature, only need little electric energy that refrigeration system is reached to be cooled the required cold requirement of object, for relevant processing link has been saved a large amount of electric energy, outdoor cold air resource is clean, infinitely great, obtain facility, and utilize this resource to environment without any pollution.
Meanwhile, this system is indirect cooling system, makes water as refrigerating medium, nontoxic, to the object that is cooled, without any harmful effect, can be applied in the cooling production link of the food processing class enterprises such as milk plant, brewery or pharmacy corporation, can not exert an influence to food or drug quality.Native system is in the application of Partial Food class processing enterprise, and energy-saving effect is remarkable, obtains the effect of 250kW refrigeration compressor with the power of 3kW pump.
The beneficial effect of Dual-energy source of the present invention indirect refrigeration system in parallel and method is:
1, during winter operation without opening the very large compressor of power consumption, the refrigerating capacity of system still can meet the cooling requirement of the object that is cooled, and has saved a large amount of electric energy, has made electric energy saving more than 80%;
2, during winter operation, owing to need not opening compressor, reduce the noise of system operation, reduced the service wear of the refrigeration plants such as compressor, extended the service life of refrigeration plant;
3, adopt indirect refrigeration circulation, ensured the quality safety of the processed objects such as food, medicine in cold working or storage.
4, native system can be applied to cold working and cryopreservation link, there is no limitation, and can guarantee the even of temperature field.
Accompanying drawing explanation
Fig. 1 is the principle schematic of Dual-energy source of the present invention indirect refrigeration system in parallel;
The specific embodiment
The specific embodiment one: present embodiment is described referring to Fig. 1, Dual-energy source indirect refrigeration system in parallel described in present embodiment, it comprises compressor 1, condenser 2, gas-liquid separator 3, plate type heat exchanger 4, choke valve 7 and water pump 8, and it also comprises refrigerated medium pump 9 and outdoor heat exchanger 6;
The second output channel outlet of described plate type heat exchanger 4 is communicated with the entrance of refrigerated medium pump 9, the outlet of this refrigerated medium pump 9 is communicated with the entrance of outdoor heat exchanger 6, the first input channel entrance of gas-liquid separator 3 is communicated with the outlet of outdoor heat exchanger 6, the first output channel outlet of described gas-liquid separator 3 is communicated with the input channel entrance of condenser 2 by compressor 1, the output channel outlet of condenser 2 is communicated with the second input channel entrance of gas-liquid separator 3 through choke valve 7, the second output channel outlet of gas-liquid separator 3 is communicated with the first input channel entrance of plate type heat exchanger 4, the first output channel outlet of plate type heat exchanger 4 is communicated with the entrance of water pump 8, the outlet of this water pump 8 is communicated with the refrigeration piping entrance of refrigeration object, the refrigeration piping outlet of this refrigeration object is communicated with the second input channel entrance of plate type heat exchanger 4.
In present embodiment, on the basis of existing refrigeration system, increased outdoor heat exchanger 6, that is: on the basis of existing refrigeration system, the pipeline at compressor 1 place in existing system is in parallel with outdoor heat exchanger 6, just natural cold-energy can be applied in refrigeration system.
The specific embodiment two: present embodiment is with the difference of the Dual-energy source indirect refrigeration system in parallel described in the specific embodiment one, it also comprises 10 and No. 2 magnetic valves 11 of 5, No. 1 magnetic valve of temperature controller,
No. 1 described magnetic valve 10 is arranged between the second output channel outlet and the entrance of refrigerated medium pump 9 of plate type heat exchanger 4,
No. 2 magnetic valve 11 is arranged between the second output channel outlet and the first input channel entrance of gas-liquid separator 3 of plate type heat exchanger 4,
Described temperature controller 5 is for gathering outdoor temperature, and transmits control signal respectively to the control end of No. 1 magnetic valve 10 and the control end of No. 2 magnetic valves 11.
In present embodiment, 10 and No. 2 magnetic valves 11 of 5, No. 1 magnetic valve of temperature controller, be in order to make this system be applicable to season except winter, can also be applicable in environment that temperature is higher that is: according to outdoor temperature, select whether to access outdoor heat exchanger 6 and participate in refrigeration.
The specific embodiment three: the Dual-energy source indirect refrigeration method in parallel described in present embodiment, the method realizes based on following refrigeration system,
This refrigeration system comprises compressor 1, condenser 2, gas-liquid separator 3, plate type heat exchanger 4, outdoor heat exchanger 6, choke valve 7, water pump 8, temperature controller 5,10 and No. 2 magnetic valves 11 of 9, No. 1 magnetic valve of refrigerated medium pump;
The second output channel outlet of described plate type heat exchanger 4 is communicated with the entrance of refrigerated medium pump 9 through No. 2 magnetic valves 11, the outlet of this refrigerated medium pump 9 is communicated with the entrance of outdoor heat exchanger 6, the second output channel outlet of described plate type heat exchanger 4 is also communicated with the first input channel entrance of gas-liquid separator 3 by No. 1 magnetic valve 10, and the first input channel entrance of this gas-liquid separator 3 is communicated with the outlet of outdoor heat exchanger 6, the first output channel outlet of described gas-liquid separator 3 is communicated with the input channel entrance of condenser 2 by compressor 1, the output channel outlet of condenser 2 is communicated with the second input channel entrance of gas-liquid separator 3 through choke valve 7, the second output channel outlet of gas-liquid separator 3 is communicated with the first input channel entrance of plate type heat exchanger 4, the first output channel outlet of plate type heat exchanger 4 is communicated with the entrance of water pump 8, the outlet of this water pump 8 is communicated with the refrigeration piping entrance of refrigeration object, the refrigeration piping outlet of this refrigeration object is communicated with the second input channel entrance of plate type heat exchanger 4,
Described temperature controller 5 is for gathering outdoor temperature, and transmits control signal respectively to the control end of No. 1 magnetic valve 10 and the control end of No. 2 magnetic valves 11;
The specific implementation process of the method is,
When outdoor temperature is when being more than or equal to 0 ℃, temperature controller 5 is controlled No. 1 magnetic valve 10 and is opened, No. 2 magnetic valve 11 cuts out, in plate type heat exchanger 4, cold-producing medium flows in gas-liquid separator 3 by No. 1 magnetic valve 10, and cold-producing medium is sucked by compressor 1 by gas-liquid separator 3, and cold-producing medium is after compressor 1 compression, be discharged into condenser 2 and carry out condensation, and then after choke valve 7 enters gas-liquid separator 3, flow in plate type heat exchanger 4 and carry out exchange heat with chilled water
When outdoor temperature drops to below 0 ℃, temperature controller 5 is controlled No. 1 magnetic valve 10 and is closed, No. 2 magnetic valve 11 is opened, after in plate type heat exchanger 4, cold-producing medium pressurizes by 11 cooled doses of pumps of No. 2 magnetic valves 9, enter in outdoor heat exchanger 6 and carry out heat release, the cold-producing medium after cooling is got back to gas-liquid separator 3, by the second output channel of gas-liquid separator 3, enters in plate type heat exchanger 4, and carry out exchange heat with the chilled water in this plate type heat exchanger 4
After cooled dose of cooling of chilled water in plate type heat exchanger 4, through water pump 8, pressurize, cooling object is lowered the temperature.
In present embodiment, when outdoor temperature is when being more than or equal to 0 ℃, need to use compressor 1, freeze, and when outdoor temperature drops to below 0 ℃, without using compressor.
Claims (3)
1. Dual-energy source indirect refrigeration system in parallel, it comprises compressor (1), condenser (2), gas-liquid separator (3), plate type heat exchanger (4), choke valve (7) and water pump (8), it is characterized in that, it also comprises refrigerated medium pump (9) and outdoor heat exchanger (6);
The second output channel outlet of described plate type heat exchanger (4) is communicated with the entrance of refrigerated medium pump (9), the outlet of this refrigerated medium pump (9) is communicated with the entrance of outdoor heat exchanger (6), the first input channel entrance of gas-liquid separator (3) is communicated with the outlet of outdoor heat exchanger (6), the first output channel outlet of described gas-liquid separator (3) is communicated with the input channel entrance of condenser (2) by compressor (1), the output channel outlet of condenser (2) is communicated with the second input channel entrance of gas-liquid separator (3) through choke valve (7), the second output channel outlet of gas-liquid separator (3) is communicated with the first input channel entrance of plate type heat exchanger (4), the first output channel outlet of plate type heat exchanger (4) is communicated with the entrance of water pump (8), the outlet of this water pump (8) is communicated with the refrigeration piping entrance of refrigeration object, the refrigeration piping outlet of this refrigeration object is communicated with the second input channel entrance of plate type heat exchanger (4).
2. Dual-energy source according to claim 1 indirect refrigeration system in parallel, is characterized in that, it also comprises temperature controller (5), No. 1 magnetic valve (10) and No. 2 magnetic valves (11),
Described No. 1 magnetic valve (10) is arranged between the second output channel outlet and the entrance of refrigerated medium pump (9) of plate type heat exchanger (4),
No. 2 magnetic valves (11) are arranged between the second output channel outlet and the first input channel entrance of gas-liquid separator (3) of plate type heat exchanger (4),
Described temperature controller (5) is for gathering outdoor temperature, and transmits control signal respectively to the control end of No. 1 magnetic valve (10) and the control end of No. 2 magnetic valves (11).
3. Dual-energy source indirect refrigeration method in parallel, is characterized in that, the method realizes based on following refrigeration system,
This refrigeration system comprises compressor (1), condenser (2), gas-liquid separator (3), plate type heat exchanger (4), outdoor heat exchanger (6), choke valve (7), water pump (8), temperature controller (5), refrigerated medium pump (9), No. 1 magnetic valve (10) and No. 2 magnetic valves (11);
The second output channel outlet of described plate type heat exchanger (4) is communicated with the entrance of refrigerated medium pump (9) through No. 2 magnetic valves (11), the outlet of this refrigerated medium pump (9) is communicated with the entrance of outdoor heat exchanger (6), the second output channel outlet of described plate type heat exchanger (4) is also communicated with the first input channel entrance of gas-liquid separator (3) by No. 1 magnetic valve (10), and the first input channel entrance of this gas-liquid separator (3) is communicated with the outlet of outdoor heat exchanger (6), the first output channel outlet of described gas-liquid separator (3) is communicated with the input channel entrance of condenser (2) by compressor (1), the output channel outlet of condenser (2) is communicated with the second input channel entrance of gas-liquid separator (3) through choke valve (7), the second output channel outlet of gas-liquid separator (3) is communicated with the first input channel entrance of plate type heat exchanger (4), the first output channel outlet of plate type heat exchanger (4) is communicated with the entrance of water pump (8), the outlet of this water pump (8) is communicated with the refrigeration piping entrance of refrigeration object, the refrigeration piping outlet of this refrigeration object is communicated with the second input channel entrance of plate type heat exchanger (4),
Described temperature controller (5) is for gathering outdoor temperature, and transmits control signal respectively to the control end of No. 1 magnetic valve (10) and the control end of No. 2 magnetic valves (11);
The specific implementation process of the method is,
When outdoor temperature is when being more than or equal to 0 ℃, temperature controller (5) is controlled No. 1 magnetic valve (10) and is opened, No. 2 magnetic valves (11) cut out, in plate type heat exchanger (4), cold-producing medium flows in gas-liquid separator (3) by No. 1 magnetic valve (10), cold-producing medium is sucked by compressor (1) by gas-liquid separator (3), cold-producing medium is after compressor (1) compression, be discharged into condenser (2) and carry out condensation, and then after choke valve (7) enters gas-liquid separator (3), flow in plate type heat exchanger (4) and carry out exchange heat with chilled water
When outdoor temperature drops to below 0 ℃, temperature controller (5) is controlled No. 1 magnetic valve (10) and is closed, No. 2 magnetic valves (11) are opened, after in plate type heat exchanger (4), cold-producing medium pressurizes by cooled dose of pumps of No. 2 magnetic valves (11) (9), enter in outdoor heat exchanger (6) and carry out heat release, cold-producing medium after cooling is got back to gas-liquid separator (3), by the second output channel of gas-liquid separator (3), enter in plate type heat exchanger (4), and carry out exchange heat with the chilled water in this plate type heat exchanger (4)
After cooled dose of cooling of chilled water in plate type heat exchanger (4), through water pump (8) pressurization, cooling object is lowered the temperature.
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| CN106568259A (en) * | 2015-10-08 | 2017-04-19 | 中海油能源发展股份有限公司 | Refrigeration house refrigerating system based on liquefied natural gas cold energy |
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