CN106484999A - A kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method - Google Patents
A kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method Download PDFInfo
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- CN106484999A CN106484999A CN201610888493.6A CN201610888493A CN106484999A CN 106484999 A CN106484999 A CN 106484999A CN 201610888493 A CN201610888493 A CN 201610888493A CN 106484999 A CN106484999 A CN 106484999A
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- G06F30/20—Design optimisation, verification or simulation
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F2111/06—Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
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Abstract
The present invention relates to a kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method, comprise the following steps：For user location meteorological condition and environmental factorss, gather the meteorological condition supplemental characteristic in operation of heat pump interval and it is analyzed, find out the optimized operation duty parameter in heat source tower heat pump run time, as one of Heat Pump Design major parameter；Calculate flow resistance in heat pump for the cold-producing medium and change in pressure drop situation data；Calculate the pressure value of not compressor suction gas opening in the same time during operation of heat pump；According to the time dependent curve of pressure value during compressor operating, determine compressor actual motion pressure ratio and optimize compressor interior volume specific ratio.The present invention passes through to confirm that heat pump optimized operation is interval, and then calculates operation of heat pump pressure, draws compressor operating pressure range, preferably goes out compressor operating optimal pressure ratio, apolegamy compressor optimum interior volume specific ratio, can meet the needs of practical application well.
Description
Technical field
The invention belongs to heat source tower heat pump helical-lobe compressor technical field is and in particular to a kind of heat source tower heat pump screw rod
Compressor interior volume specific ratio optimization method.
Background technology
It is increasingly becoming key factor, energy-saving and environmental protection and the low-carbon economy of restriction sustainable economic development with energy scarcity
Increasingly cause the concern of society.Heat pump heat supply technology, as novel energy-conserving product, has Renewable resource utilization ratio height, section
The features such as energy, environmental protection, have started to be paid close attention to by all trades and professions.Heat pump techniques build field of central air-conditioning and the people in China at present
With having been obtained in field preferably applying, also achieve preferable economic results in society and environmental protection benefit.As by heat
Pump technology is applied to the larger field of industrial production that consumes energy, and can greatly reduce the energy consumption in process of producing product, produces brighter
Aobvious economic benefit.
Carry out heat supply and air-conditioning using heat source tower heat source system, there is good energy-conservation and environmental benefit, in recent years in the summer
The cold Yangtze river basin of hot winter and areas to the south have obtained increasingly extensive application.In south China area, winter low temperature high humidity
In the air has contained the substantial amounts of low temperature high level heat converted by solar energy, carries out heat exchange by heat source tower with it, is
Source pump provides thermal source, summer, and heat source tower is used as cooling tower, goes to carry out heat exchange with air using water evaporation is cold, is heat pump
Unit provides low-temperature receiver.Air is equivalent to a carrier regenerator, and heat source tower heat pump system is passed through to absorb or release heat energy from the air,
Can be that building provides heat supplying air conditioning and domestic hot-water, be a kind of renewable energy utilization technology of novel practical, it is to avoid sky
The problem that the frequent defrost of air supply heat pump and ground pipe heat pump are limited by land used condition.
Spiral Lobe Refrigeration Compressor is different from Piston Refrigerant Compreessor, in the presence of its exhaust end no exhaust valve plate, only sets
Put the vent ports of certain area and given shape.By positive displacement compressor compressed gas principle, for making full use of swept volume
Realize the compression of gas, should connect with air entry when inter-tooth volume increases, start breathing process.When inter-tooth volume is maximum,
Terminate breathing process；Then, inter-tooth volume reduces volume in the closed state, and gas pressure raises, and is connecting with vent ports
Before, complete compression process, finally, the reduction of inter-tooth volume therewith, all gases at high pressure are gradually discharged from steam vent.Ideal operation
Process is as shown in Figure 1.
Before the inter-tooth volume of compressor will connect with vent ports, other pressure Pi in inter-tooth volume is referred to as compressing
The pressure ended.The interior ratio compressing end of a period pressure and pressure of inspiration(Pi), referred to as inner pressure ratio.Gas pressure Pd in discharge duct is referred to as
External pressure or back pressure, it is referred to as external pressure ratio with the ratio of pressure of inspiration(Pi).Helical-lobe compressor is inhaled, the position in pressure at expulsion aperture
Put and determine interior pressure ratio with shape.In operating condition meeting technological process, required suction, pressure at expulsion, determine external pressure
Than.When the external and internal pressure ratio of helical-lobe compressor differs, arise that under-voltage contracting as shown in Figures 2 and 3 and overcompression
Journey.
In the case that pressure at expulsion is higher than interior compression end of a period pressure, the moment that inter-tooth volume is connected with vent ports, row
Gas in gas opening enters rapid retrograde flow in inter-tooth volume, and pressure therein is promoted to suddenly Pd by Pi, then again with
Constantly reducing of inter-tooth volume, discharges gas (as shown in Figure 2).In the case that pressure at expulsion is less than interior compression end of a period pressure,
The moment that inter-tooth volume is connected with vent ports, the gas in inter-tooth volume can flow into rapidly in vent ports, makes inter-tooth volume
In gas pressure near Pd suddenly, in reducing with element volume, gas is discharged (as shown in Figure 3).
When external and internal pressure than unequal when, always cause aditional energy loss, as shown in shaded area in Fig. 2.Additionally, it is interior
External pressure is unequal to be also accompanied by strong periodicity exhaust noise.In compressor design, typically make every effort to interior compression ratio with
External compression ratio is equal or close, so that helical-lobe compressor obtains greater efficiency.
In heat source tower heat pump running, affected by using ground locality meteorological condition, operation of heat pump operating mode is in dynamically
Change procedure.During heat source tower heat pump design of twin screw compressor, after screw rotor structure determination, compress self-contained volume
Than for definite value.When working conditions change causes compressor Suck and exhaust pressure to change, compressor inner refrigerant compression process deviates reason
Think compression process, be likely to be at overcompression and under-voltage compression process, lead to compressor efficiency to reduce, heat pump Energy Efficiency Ratio declines.Thermal source
It is necessary to design is optimized to the interior volume specific ratio of helical-lobe compressor during tower Heat Pump Design, to ensure heat pump Effec-tive Function.
Content of the invention
For above-mentioned problems of the prior art, it is an object of the invention to provide one kind can avoid the occurrence of above-mentioned skill
The heat source tower heat pump of art defect helical-lobe compressor interior volume specific ratio optimization method.
In order to realize foregoing invention purpose, the technical scheme that the present invention provides is as follows：
A kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method, comprises the following steps：
Carry out meteorological condition parameter acquisition and analysis, for user location meteorological condition and environmental factorss, gather heat pump
Meteorological condition supplemental characteristic in traffic coverage is simultaneously analyzed to it, finds out the optimized operation in heat source tower heat pump run time
Duty parameter, as one of Heat Pump Design major parameter；
Calculate flow resistance in heat pump for the cold-producing medium and change in pressure drop situation data；
Calculate the pressure value of not compressor suction gas opening in the same time during operation of heat pump；
According to the time dependent curve of pressure value during compressor operating, determine compressor actual motion pressure ratio simultaneously
Optimize compressor interior volume specific ratio.
Further, the definition of described compressor interior volume specific ratio is：
In formula,Represent torsional angle coefficient；Represent compression corner in male rotor, represent that inter-tooth volume is connected with vent ports
Male rotor corner during logical moment；Represent first stage torsion angle, its concrete numerical value is by molded line species and the yin, yang rotor number of teeth
Deng molded line relating to parameters；τ1zRepresent male rotor torsion angle, represent male rotor molded line from an end face of rotor for the helical movement to
The angle that another end face of rotor is turned over.
Further, after calculating optimum interior volume specific ratio needed for compressor, according to this value reasonable selection screw rotor tooth
Number, determines first stage cornerValue, meanwhile, compression corner in adjustmentAnd torsion angle τ1zDeng numerical value, determine that screw rotor is several
What structure, completes heat source tower heat pump rotor of helical lobe compressor and body design.
The heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method that the present invention provides, for optimizing helical-lobe compressor
Interior volume specific ratio is matched, and makes the heat pump Energy Efficiency Ratio that helical-lobe compressor is used for during heat source tower heat pump optimum；The present invention is by user institute
Meteorological condition on ground and surrounding enviroment are included in design calculating, by mathematical statistics method, determine the optimum fortune of heat source tower heat pump
Trip temperature scope；Mathematical statistics method adopts normal distribution, determines heat source tower heat pump optimized operation temperature range；By refrigeration used
Agent physical parameter, the capacity of source pump and heat exchanger form include calculating process, by the cold-producing medium flowing resistance in operation of heat pump
Power and pressure drop are included in optimization calculating, for calculating optimized operation operating mode；The present invention passes through to confirm that heat pump optimized operation is interval, enters
And calculate operation of heat pump pressure, draw compressor operating pressure range, preferably go out compressor operating optimal pressure ratio, apolegamy pressure
Contracting machine optimum interior volume specific ratio, can meet the needs of practical application well.
Brief description
Fig. 1 is the function relation curve schematic diagram with pressure for the volume of ideal operation process of Spiral Lobe Refrigeration Compressor；
Fig. 2 is the function relation curve schematic diagram with pressure for the volume of under-voltage compression process of Spiral Lobe Refrigeration Compressor；
Fig. 3 is the function relation curve schematic diagram with pressure for the volume of over-pressed compression process of Spiral Lobe Refrigeration Compressor；
Fig. 4 is the schematic flow sheet of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with the accompanying drawings and be embodied as
The present invention will be further described for example.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and without
In the restriction present invention.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of protection of the invention.
With reference to shown in Fig. 4, heat source tower heat pump helical-lobe compressor interior volume specific ratio Optimization Design, comprise the steps of：
Meteorological condition parameter acquisition and analysis：For user location meteorological condition and environmental factorss, gather operation of heat pump
Interval in meteorological condition supplemental characteristic and it is analyzed, by processing methods such as mathematical statisticss and theory of probability, find out heat
Optimized operation duty parameter in the source tower operation of heat pump time, as one of Heat Pump Design major parameter, and has this parameter as
Optimized operation operating mode is supplied to next step design process；
For different capabilities source pump, by calling physical properties module and heat exchanger structure module, calculate refrigeration
Flow resistance in heat pump for the agent and change in pressure drop situation data, this data are supplied to next step as design parameter and designed
Journey；
By the calculating of flow resistance and have determined that heat pump optimized operation operating mode, calculate during operation of heat pump not in the same time
Compressor suction gas opening pressure value；
According to compressor desired compression process, when during compressor operating, inside and outside pressure ratio is identical, compressor compresses are imitated
Rate highest, according to the time dependent curve of pressure value during compressor operating, determines compressor actual motion pressure ratio simultaneously
Optimize compressor interior volume specific ratio.
The definition of compressor interior volume specific ratio is (to use ε in formulaVRepresent interior volume specific ratio)：
Wherein：
In formula, V0Represent the maximum volume value that inter-tooth volume can reach；ViRepresent the volumetric values at the end of compression process；
VmaxRepresent compressor inter-tooth volume maximum；VrRepresent the volume reducing value of inter-tooth volume in compression process；Represent torsional angle system
Number；A0Represent between cog area；S0Represent expiratory phase inter-tooth volume decreasing value；Represent compression corner in male rotor, represent tooth
Between volume be connected with vent ports moment when male rotor corner；Represent first stage torsion angle, its concrete numerical value is by type
The molded line relating to parameters such as line species and the yin, yang rotor number of teeth；τ1zRepresent male rotor torsion angle, represent male rotor molded line from rotor
The angle that one end face another end face to rotor for the helical movement is turned over.
After calculating needed for compressor optimum interior volume specific ratio, according to this value reasonable selection screw rotor number of teeth, determine the
One stage cornerValue, meanwhile, compression corner in adjustmentAnd torsion angle τ1zDeng numerical value, determine screw rotor geometry, complete
Become heat source tower heat pump rotor of helical lobe compressor and body design.
The heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method that the present invention provides, for optimizing helical-lobe compressor
Interior volume specific ratio is matched, and makes the heat pump Energy Efficiency Ratio that helical-lobe compressor is used for during heat source tower heat pump optimum；The present invention is by user institute
Meteorological condition on ground and surrounding enviroment are included in design calculating, by mathematical statistics method, determine the optimum fortune of heat source tower heat pump
Trip temperature scope；Mathematical statistics method adopts normal distribution, determines heat source tower heat pump optimized operation temperature range；By refrigeration used
Agent physical parameter, the capacity of source pump and heat exchanger form include calculating process, by the cold-producing medium flowing resistance in operation of heat pump
Power and pressure drop are included in optimization calculating, for calculating optimized operation operating mode；The present invention passes through to confirm that heat pump optimized operation is interval, enters
And calculate operation of heat pump pressure, draw compressor operating pressure range, preferably go out compressor operating optimal pressure ratio, apolegamy pressure
Contracting machine optimum interior volume specific ratio, can meet the needs of practical application well.
Embodiment described above only have expressed embodiments of the present invention, and its description is more concrete and detailed, but can not
Therefore it is interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the protection model of the present invention
Enclose.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (3)
1. a kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method is it is characterised in that comprise the following steps：
Carry out meteorological condition parameter acquisition and analysis, for user location meteorological condition and environmental factorss, gather operation of heat pump
Interval in meteorological condition supplemental characteristic and it is analyzed, find out the optimized operation operating mode in heat source tower heat pump run time
Parameter, as one of Heat Pump Design major parameter.
Calculate flow resistance in heat pump for the cold-producing medium and change in pressure drop situation data.
Calculate the pressure value of not compressor suction gas opening in the same time during operation of heat pump.
According to the time dependent curve of pressure value during compressor operating, determine compressor actual motion pressure ratio and optimize
Compressor interior volume specific ratio.
2. compressor interior volume specific ratio according to claim 1 is it is characterised in that the definition of described compressor interior volume specific ratio
For：
In formula,Represent torsional angle coefficient；Represent compression corner in male rotor, represent that inter-tooth volume is connected wink with vent ports
Between when male rotor corner；Represent first stage torsion angle, its concrete numerical value is by the type such as molded line species and the yin, yang rotor number of teeth
Line relating to parameters；τ1zRepresent male rotor torsion angle, represent male rotor molded line from an end face of rotor for the helical movement to rotor
The angle that turned over of another end face.
3. the helical-lobe compressor interior volume specific ratio optimization method of the heat source tower heat pump according to claim 1 and 2, its feature exists
In, after calculating needed for compressor optimum interior volume specific ratio, according to this value reasonable selection screw rotor number of teeth, determining the first stage
CornerValue, meanwhile, compression corner in adjustmentAnd torsion angle τ1zDeng numerical value, determine screw rotor geometry, complete thermal source
Tower heat pump rotor of helical lobe compressor and body design.
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| CN201610888493.6A CN106484999A (en) | 2016-10-11 | 2016-10-11 | A kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method |
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| CN201610888493.6A CN106484999A (en) | 2016-10-11 | 2016-10-11 | A kind of heat source tower heat pump helical-lobe compressor interior volume specific ratio optimization method |
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Cited By (1)
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| CN114372321A (en) * | 2021-12-13 | 2022-04-19 | 中国船舶重工集团公司第七一一研究所 | Temperature design method for water interlayer shell of double-screw compressor |
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| CN204961294U (en) * | 2015-09-25 | 2016-01-13 | 江森自控空调冷冻设备(无锡)有限公司 | But helical -lobe compressor of automatically regulated inner volume ratio |
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| CN114372321A (en) * | 2021-12-13 | 2022-04-19 | 中国船舶重工集团公司第七一一研究所 | Temperature design method for water interlayer shell of double-screw compressor |
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