CN106247691B - Heat circulation unit - Google Patents

Heat circulation unit Download PDF

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Publication number
CN106247691B
CN106247691B CN201610625247.1A CN201610625247A CN106247691B CN 106247691 B CN106247691 B CN 106247691B CN 201610625247 A CN201610625247 A CN 201610625247A CN 106247691 B CN106247691 B CN 106247691B
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heat
outlet
circulation unit
fatigue
import
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CN106247691A (en
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不公告发明人
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Tianjin Pauway Power Equipment Co ltd
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Taizhou Xiling Textile Machinery Tool Factory
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Classifications

    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers

Abstract

The invention discloses heat circulation unit, including evaporator, condenser, with heat exchange import, heat exchange outlet, the heat converter for taking hot import, heat being taken to export, the heat exchange import is connected with heat exchange outlet, and hot import is taken to be connected with hot export is taken；The heat exchange import of the heat converter is provided as the heat source medium that waste heat exhausts and enters, the evaporation inlet communication of heat exchange outlet and the evaporator；Heat converter takes heat to take thermal medium to enter into confession, takes the condensation inlet communication of heat outlet and the condenser；The media outlet of the evaporator is waste heat outlet, and the media outlet of condenser is heat supply mouth.The present invention can recycle the thermal energy in waste water, and be capable of providing the hot water of equilibrium temperature, while substantially increase the heat exchange efficiency and Energy Efficiency Ratio of heating system.

Description

Heat circulation unit
Technical field
The present invention relates to heat energy technology fields, and in particular to heat circulation unit.
Background technology
In city domestic sewage, industrial wastewater, also have such as shower waste, industry cooling waste water, in these waste water certain Temperature is just gone out as direct discharging of waste water containing certain heat, the heat wasted in waste water in vain, Bu Nenghe Reason utilizes, and thermal energy is caused to waste；In addition, containing impurity, pollutant in waste water, it can be to the environment shape of surrounding if being directly emitted At pollution, the life health of group around is influenced.If utilized to the thermal energy in sewage, waste water, just can solve in water The problem of thermal energy wastes, economizes on resources, and can also be to solve the problems, such as environmental pollution.
Invention content
To solve the above problems, the present invention is intended to provide heat circulation unit.
The purpose of the present invention is realized using following technical scheme：
Heat circulation unit, including evaporator, condenser, have heat exchange import, heat exchange outlet, take hot import, heat taken to go out The heat converter of mouth, the heat exchange import are connected with heat exchange outlet, and hot import is taken to be connected with heat outlet is taken；The thermal energy The heat exchange import of converter is provided as the heat source medium that waste heat exhausts and enters, the evaporation import of heat exchange outlet and the evaporator Connection；Heat converter takes heat to take thermal medium to enter into confession, takes the condensation inlet communication of heat outlet and the condenser； The media outlet of the evaporator is waste heat outlet, and the media outlet of condenser is heat supply mouth.
The operation principle of the present invention is that：Evaporator is drawn into the heat of wherein heat source medium, makes the biography inside evaporator Thermal medium flashes to the steam of heat-transfer working medium, steam by the compressor inside evaporator compression, temperature and pressure on Rise become high temperature, high pressure steam, high temperature, high pressure steam using condenser when be condensed into liquid, discharge heat, release The heat gone out, which is passed through in condenser, takes thermal medium to obtain, and the temperature of thermal medium is taken to increase in this way, and discharges the liquid after heat Body is by decompression Returning evaporimeter, carrying out cycle next time.
Beneficial effects of the present invention are：Thermal energy in waste water can be recycled, and be capable of providing equilibrium temperature Hot water, while substantially increasing the heat exchange efficiency and Energy Efficiency Ratio of heating system, efficiently solve above-mentioned technical problem.
Description of the drawings
Using attached drawing, the invention will be further described, but the application scenarios in attached drawing do not constitute any limit to the present invention System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings Other attached drawings.
Fig. 1 is the structure connection diagram of the present invention；
Fig. 2 is the structural schematic diagram of life appraisal device of the present invention.
Reference numeral：
Evaporator 1, evaporation import 11, waste heat outlet 12, condenser 2, condensation import 21, heat supply mouth 22, thermal energy Converter 3, heat exchange outlet 32, takes hot import 33, takes heat outlet 34, liquid storage device 4, life appraisal device 5, data heat exchange import 31 Preparation module 51, durability analysis prediction module 52.
Specific implementation mode
In conjunction with following application scenarios, the invention will be further described.
Application scenarios 1
Referring to Fig. 1, Fig. 2, the heat circulation unit of one embodiment of this application scene, including evaporator 1, condenser 2, With heat exchange import 31, heat exchange outlet 32, take hot import 33, take heat outlet 34 heat converter 3, the heat exchange import 31 and Heat exchange outlet 32 is connected, and hot import 33 is taken to be connected with heat outlet 34 is taken；The heat exchange import 31 of the heat converter 3 is made for Enter for the heat source medium that waste heat exhausts, heat exchange outlet 32 is connected to the evaporation import 11 of the evaporator 1；Heat converter 3 take hot import 33 for taking thermal medium to enter, and take the heat outlet 34 to be connected to the condensation import 21 of the condenser 2；The steaming The media outlet for sending out device 1 is waste heat outlet 12, and the media outlet of condenser 2 is heat supply mouth 22.
Preferably, the heat converter 3 take heat outlet the 34 heat supply mouths 22 by bypass line and the condenser 2 Connection.
The operation principle of the present invention is that：Evaporator 1 is drawn into the heat of wherein heat source medium, makes inside evaporator 1 Heat transfer medium flashes to the steam of heat-transfer working medium, and steam passes through the compression of the compressor inside evaporator 1, and temperature and pressure is equal Rise become high temperature, high pressure steam, high temperature, high pressure steam using liquid is condensed into when condenser 2, discharge heat, The heat released, which is passed through in condenser 2, takes thermal medium to obtain, and the temperature of thermal medium is taken to increase in this way, and after discharging heat Liquid by decompression Returning evaporimeter 1 in, carry out cycle next time.
The above embodiment of the present invention can recycle the thermal energy in waste water, and be capable of providing the heat of equilibrium temperature Water, while the heat exchange efficiency and Energy Efficiency Ratio of heating system are substantially increased, efficiently solve above-mentioned technical problem.
Preferably, the heat exchange import 31 of the heat converter 3 be provided with the heat source medium to being exhausted as waste heat into The liquid storage device 4 that row is collected.
Liquid storage device 4 is arranged in this preferred embodiment, is conducive to carry out centralized collection to the waste water with temperature of discharge.
Preferably, the heat circulation unit further includes life appraisal device 5, and the life appraisal device 5 includes data preparation Module 51 and durability analysis prediction module 52, the data preparation module 51 are used to determine the actual measurement allusion quotation of heat circulation unit body The crack position of each actual crack, size on type loading spectrum, heat circulation unit body, and geometry simplification is carried out to various crackles Classification；The durability analysis prediction module 52 is used to carry out fatigue test to the material of the heat circulation unit body, obtains The material corresponds to the fatigue crack growth rate curve of various crackles, and then to actual measurement loads typical spectrum, each reality The crack position of crackle, the fatigue crack growth rate curve progress Crack growth analysis of size and various crackles, determining pair In the crack propagation life recurring number of various crackles the surplus of corresponding crackle should be determined further according to the crack propagation life recurring number The estimated value of remaining fatigue life, the estimated value of the final remanent fatigue life for determining heat circulation unit body.
Life appraisal device is arranged in this preferred embodiment, and constructs the structural framing of life appraisal device 5, can supervise in real time The health performance of calorimetric energy Cycle Unit increases the safety of heat circulation unit running.
Preferably, definition corresponds to crackle i=1, and the estimated value collection of the remanent fatigue life of 2 ... m is { P1,P2,…, Pi, the estimated value P of heat circulation unit body remanent fatigue lifeZIt is then：
PZ=minI=1,2 ... m{P1,P2,…,Pi}。
This preferred embodiment determines the remanent fatigue life and heat circulation unit body of heat circulation unit body Relationship between the remanent fatigue life of each actual crack, using the fatigue life of minimum actual crack as heat circulation machine The remanent fatigue life of group body, meets Law of Barrel, and accuracy is high.
Preferably, the material to the heat circulation unit body carries out fatigue test, obtains the material and corresponds to In the fatigue crack growth rate curve of various crackles, including：
1) stress intensive factor range for calculating various crackles considers that the plastically deforming area of crackle sharp-crested point can be to the tired of material Labor fracture has decisive impact, and crackle sharp-crested plastic zone, which is equivalent to a homogeneous containing phase transition strain, to be mingled with, definition Stress intensive factor range Δ KpcCalculation formula be：
In formula
Wherein,For the stress intensity factor through plastic correcting being calculated by maximum load in fatigue and cyclic load Value,For the stress intensity factor value through plastic correcting being calculated by minimum load in fatigue and cyclic load, KycIt is remote Stress intensity factor under field action, LOAD FOR when being opened completely by crackle obtain, Δ KscIndicate crackle sharp-crested plastic zone Caused stress intensity factor increment, A are the area around the plastic zone of crackle sharp-crested comprising are produced in crack propagation process Raw plastic deformation tail area, σ11、σ12、σ22For the stress in crackle sharp-crested plastic zone, by crackle sharp-crested plastic zone stress field Finite element method (fem) analysis obtain, R be tensile load and compressive load ratio；
2) fatigue crack growth rate curve for building various crackles considers temperature to fatigue based on Paris formula Crackle expands the influence of rate, and the modified computing formulae for defining the fatigue crack growth rate is：
T<0℃OR T>TmaxWhen,
0℃≤T≤TmaxWhen,
In formula, T is test temperature, TmaxFor the maximum temperature of setting, TmaxValue range be [35 DEG C, 40 DEG C], a be split Line extension length, N are cycle-index, and C and M are material constant, Δ KTTo be fitted crack propagation performance curved surface at improper temperature The improper temperature that post analysis obtains is broken threshold value, embodies influence of the temperature to spreading rate, and Δ KTValue range It needs to meet [0, Δ Kpc)。
This preferred embodiment defines stress intensive factor range Δ KpcCalculation formula, and consider the modeling of crackle sharp-crested point Property deformed area can have decisive impact the fatigue fracture of material, and crackle sharp-crested plastic zone is equivalent to one and contains phase The homogeneous for becoming strain is mingled with, to the stress intensive factor range Δ K of definitionpcIt can be work perfectly well as a rational mechanical parameter Analyze influence of the crackle sharp-crested plastic zone to stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that temperature The influence of rate is expanded to fatigue crack, and defines the modified computing formulae of fatigue crack growth rate, improves calculating Precision, and it is simple and practical.
Preferably, the calculation formula of the crack propagation life recurring number N is：
This preferred embodiment determines the calculation formula of crack propagation life recurring number N, improves the speed of life prediction.
The maximum temperature T of this application scene above-described embodimentmaxIt is set as 35 DEG C, to the fatigue of heat circulation unit body The precision of life prediction is opposite to improve 15%.
Application scenarios 2
Referring to Fig. 1, Fig. 2, the heat circulation unit of one embodiment of this application scene, including evaporator 1, condenser 2, With heat exchange import 31, heat exchange outlet 32, take hot import 33, take heat outlet 34 heat converter 3, the heat exchange import 31 and Heat exchange outlet 32 is connected, and hot import 33 is taken to be connected with heat outlet 34 is taken；The heat exchange import 31 of the heat converter 3 is made for Enter for the heat source medium that waste heat exhausts, heat exchange outlet 32 is connected to the evaporation import 11 of the evaporator 1；Heat converter 3 take hot import 33 for taking thermal medium to enter, and take the heat outlet 34 to be connected to the condensation import 21 of the condenser 2；The steaming The media outlet for sending out device 1 is waste heat outlet 12, and the media outlet of condenser 2 is heat supply mouth 22.
Preferably, the heat converter 3 take heat outlet the 34 heat supply mouths 22 by bypass line and the condenser 2 Connection.
The operation principle of the present invention is that：Evaporator 1 is drawn into the heat of wherein heat source medium, makes inside evaporator 1 Heat transfer medium flashes to the steam of heat-transfer working medium, and steam passes through the compression of the compressor inside evaporator 1, and temperature and pressure is equal Rise become high temperature, high pressure steam, high temperature, high pressure steam using liquid is condensed into when condenser 2, discharge heat, The heat released, which is passed through in condenser 2, takes thermal medium to obtain, and the temperature of thermal medium is taken to increase in this way, and after discharging heat Liquid by decompression Returning evaporimeter 1 in, carry out cycle next time.
The above embodiment of the present invention can recycle the thermal energy in waste water, and be capable of providing the heat of equilibrium temperature Water, while the heat exchange efficiency and Energy Efficiency Ratio of heating system are substantially increased, efficiently solve above-mentioned technical problem.
Preferably, the heat exchange import 31 of the heat converter 3 be provided with the heat source medium to being exhausted as waste heat into The liquid storage device 4 that row is collected.
Liquid storage device 4 is arranged in this preferred embodiment, is conducive to carry out centralized collection to the waste water with temperature of discharge.
Preferably, the heat circulation unit further includes life appraisal device 5, and the life appraisal device 5 includes data preparation Module 51 and durability analysis prediction module 52, the data preparation module 51 are used to determine the actual measurement allusion quotation of heat circulation unit body The crack position of each actual crack, size on type loading spectrum, heat circulation unit body, and geometry simplification is carried out to various crackles Classification；The durability analysis prediction module 52 is used to carry out fatigue test to the material of the heat circulation unit body, obtains The material corresponds to the fatigue crack growth rate curve of various crackles, and then to actual measurement loads typical spectrum, each reality The crack position of crackle, the fatigue crack growth rate curve progress Crack growth analysis of size and various crackles, determining pair In the crack propagation life recurring number of various crackles the surplus of corresponding crackle should be determined further according to the crack propagation life recurring number The estimated value of remaining fatigue life, the estimated value of the final remanent fatigue life for determining heat circulation unit body.
Life appraisal device is arranged in this preferred embodiment, and constructs the structural framing of life appraisal device 5, can supervise in real time The health performance of calorimetric energy Cycle Unit increases the safety of heat circulation unit running.
Preferably, definition corresponds to crackle i=1, and the estimated value collection of the remanent fatigue life of 2 ... m is { P1,P2,…, Pi, the estimated value P of heat circulation unit body remanent fatigue lifeZIt is then：
PZ=minI=1,2 ... m{P1,P2,…,Pi}。
This preferred embodiment determines the remanent fatigue life and heat circulation unit body of heat circulation unit body Relationship between the remanent fatigue life of each actual crack, using the fatigue life of minimum actual crack as heat circulation machine The remanent fatigue life of group body, meets Law of Barrel, and accuracy is high.
Preferably, the material to the heat circulation unit body carries out fatigue test, obtains the material and corresponds to In the fatigue crack growth rate curve of various crackles, including：
1) stress intensive factor range for calculating various crackles considers that the plastically deforming area of crackle sharp-crested point can be to the tired of material Labor fracture has decisive impact, and crackle sharp-crested plastic zone, which is equivalent to a homogeneous containing phase transition strain, to be mingled with, definition Stress intensive factor range Δ KpcCalculation formula be：
In formula
Wherein,For the stress intensity factor through plastic correcting being calculated by maximum load in fatigue and cyclic load Value,For the stress intensity factor value through plastic correcting being calculated by minimum load in fatigue and cyclic load, KycIt is remote Stress intensity factor under field action, LOAD FOR when being opened completely by crackle obtain, Δ KscIndicate crackle sharp-crested plastic zone Caused stress intensity factor increment, A are the area around the plastic zone of crackle sharp-crested comprising are produced in crack propagation process Raw plastic deformation tail area, σ11、σ12、σ22For the stress in crackle sharp-crested plastic zone, by crackle sharp-crested plastic zone stress field Finite element method (fem) analysis obtain, R be tensile load and compressive load ratio；
2) fatigue crack growth rate curve for building various crackles considers temperature to fatigue based on Paris formula Crackle expands the influence of rate, and the modified computing formulae for defining the fatigue crack growth rate is：
T<0℃OR T>TmaxWhen,
0℃≤T≤TmaxWhen,
In formula, T is test temperature, TmaxFor the maximum temperature of setting, TmaxValue range be [35 DEG C, 40 DEG C], a be split Line extension length, N are cycle-index, and C and M are material constant, Δ KTTo be fitted crack propagation performance curved surface at improper temperature The improper temperature that post analysis obtains is broken threshold value, embodies influence of the temperature to spreading rate, and Δ KTValue range It needs to meet [0, Δ Kpc)。
This preferred embodiment defines stress intensive factor range Δ KpcCalculation formula, and consider the modeling of crackle sharp-crested point Property deformed area can have decisive impact the fatigue fracture of material, and crackle sharp-crested plastic zone is equivalent to one and contains phase The homogeneous for becoming strain is mingled with, to the stress intensive factor range Δ K of definitionpcIt can be work perfectly well as a rational mechanical parameter Analyze influence of the crackle sharp-crested plastic zone to stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that temperature The influence of rate is expanded to fatigue crack, and defines the modified computing formulae of fatigue crack growth rate, improves calculating Precision, and it is simple and practical.
Preferably, the calculation formula of the crack propagation life recurring number N is：
This preferred embodiment determines the calculation formula of crack propagation life recurring number N, improves the speed of life prediction.
The maximum temperature T of this application scene above-described embodimentmaxIt is set as 36 DEG C, to the fatigue of heat circulation unit body The precision of life prediction is opposite to improve 14%.
Application scenarios 3
Referring to Fig. 1, Fig. 2, the heat circulation unit of one embodiment of this application scene, including evaporator 1, condenser 2, With heat exchange import 31, heat exchange outlet 32, take hot import 33, take heat outlet 34 heat converter 3, the heat exchange import 31 and Heat exchange outlet 32 is connected, and hot import 33 is taken to be connected with heat outlet 34 is taken；The heat exchange import 31 of the heat converter 3 is made for Enter for the heat source medium that waste heat exhausts, heat exchange outlet 32 is connected to the evaporation import 11 of the evaporator 1；Heat converter 3 take hot import 33 for taking thermal medium to enter, and take the heat outlet 34 to be connected to the condensation import 21 of the condenser 2；The steaming The media outlet for sending out device 1 is waste heat outlet 12, and the media outlet of condenser 2 is heat supply mouth 22.
Preferably, the heat converter 3 take heat outlet the 34 heat supply mouths 22 by bypass line and the condenser 2 Connection.
The operation principle of the present invention is that：Evaporator 1 is drawn into the heat of wherein heat source medium, makes inside evaporator 1 Heat transfer medium flashes to the steam of heat-transfer working medium, and steam passes through the compression of the compressor inside evaporator 1, and temperature and pressure is equal Rise become high temperature, high pressure steam, high temperature, high pressure steam using liquid is condensed into when condenser 2, discharge heat, The heat released, which is passed through in condenser 2, takes thermal medium to obtain, and the temperature of thermal medium is taken to increase in this way, and after discharging heat Liquid by decompression Returning evaporimeter 1 in, carry out cycle next time.
The above embodiment of the present invention can recycle the thermal energy in waste water, and be capable of providing the heat of equilibrium temperature Water, while the heat exchange efficiency and Energy Efficiency Ratio of heating system are substantially increased, efficiently solve above-mentioned technical problem.
Preferably, the heat exchange import 31 of the heat converter 3 be provided with the heat source medium to being exhausted as waste heat into The liquid storage device 4 that row is collected.
Liquid storage device 4 is arranged in this preferred embodiment, is conducive to carry out centralized collection to the waste water with temperature of discharge.
Preferably, the heat circulation unit further includes life appraisal device 5, and the life appraisal device 5 includes data preparation Module 51 and durability analysis prediction module 52, the data preparation module 51 are used to determine the actual measurement allusion quotation of heat circulation unit body The crack position of each actual crack, size on type loading spectrum, heat circulation unit body, and geometry simplification is carried out to various crackles Classification；The durability analysis prediction module 52 is used to carry out fatigue test to the material of the heat circulation unit body, obtains The material corresponds to the fatigue crack growth rate curve of various crackles, and then to actual measurement loads typical spectrum, each reality The crack position of crackle, the fatigue crack growth rate curve progress Crack growth analysis of size and various crackles, determining pair In the crack propagation life recurring number of various crackles the surplus of corresponding crackle should be determined further according to the crack propagation life recurring number The estimated value of remaining fatigue life, the estimated value of the final remanent fatigue life for determining heat circulation unit body.
Life appraisal device is arranged in this preferred embodiment, and constructs the structural framing of life appraisal device 5, can supervise in real time The health performance of calorimetric energy Cycle Unit increases the safety of heat circulation unit running.
Preferably, definition corresponds to crackle i=1, and the estimated value collection of the remanent fatigue life of 2 ... m is { P1,P2,…, Pi, the estimated value P of heat circulation unit body remanent fatigue lifeZIt is then：
PZ=minI=1,2 ... m{P1,P2,…,Pi}。
This preferred embodiment determines the remanent fatigue life and heat circulation unit body of heat circulation unit body Relationship between the remanent fatigue life of each actual crack, using the fatigue life of minimum actual crack as heat circulation machine The remanent fatigue life of group body, meets Law of Barrel, and accuracy is high.
Preferably, the material to the heat circulation unit body carries out fatigue test, obtains the material and corresponds to In the fatigue crack growth rate curve of various crackles, including：
1) stress intensive factor range for calculating various crackles considers that the plastically deforming area of crackle sharp-crested point can be to the tired of material Labor fracture has decisive impact, and crackle sharp-crested plastic zone, which is equivalent to a homogeneous containing phase transition strain, to be mingled with, definition Stress intensive factor range Δ KpcCalculation formula be：
In formula
Wherein,For the stress intensity factor through plastic correcting being calculated by maximum load in fatigue and cyclic load Value,For the stress intensity factor value through plastic correcting being calculated by minimum load in fatigue and cyclic load, KycIt is remote Stress intensity factor under field action, LOAD FOR when being opened completely by crackle obtain, Δ KscIndicate crackle sharp-crested plastic zone Caused stress intensity factor increment, A are the area around the plastic zone of crackle sharp-crested comprising are produced in crack propagation process Raw plastic deformation tail area, σ11、σ12、σ22For the stress in crackle sharp-crested plastic zone, by crackle sharp-crested plastic zone stress field Finite element method (fem) analysis obtain, R be tensile load and compressive load ratio；
2) fatigue crack growth rate curve for building various crackles considers temperature to fatigue based on Paris formula Crackle expands the influence of rate, and the modified computing formulae for defining the fatigue crack growth rate is：
T<0℃OR T>TmaxWhen,
0℃≤T≤TmaxWhen,
In formula, T is test temperature, TmaxFor the maximum temperature of setting, TmaxValue range be [35 DEG C, 40 DEG C], a be split Line extension length, N are cycle-index, and C and M are material constant, Δ KTTo be fitted crack propagation performance curved surface at improper temperature The improper temperature that post analysis obtains is broken threshold value, embodies influence of the temperature to spreading rate, and Δ KTValue range It needs to meet [0, Δ Kpc)。
This preferred embodiment defines stress intensive factor range Δ KpcCalculation formula, and consider the modeling of crackle sharp-crested point Property deformed area can have decisive impact the fatigue fracture of material, and crackle sharp-crested plastic zone is equivalent to one and contains phase The homogeneous for becoming strain is mingled with, to the stress intensive factor range Δ K of definitionpcIt can be work perfectly well as a rational mechanical parameter Analyze influence of the crackle sharp-crested plastic zone to stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that temperature The influence of rate is expanded to fatigue crack, and defines the modified computing formulae of fatigue crack growth rate, improves calculating Precision, and it is simple and practical.
Preferably, the calculation formula of the crack propagation life recurring number N is：
This preferred embodiment determines the calculation formula of crack propagation life recurring number N, improves the speed of life prediction.
The maximum temperature T of this application scene above-described embodimentmaxIt is set as 38 DEG C, to the fatigue of heat circulation unit body The precision of life prediction is opposite to improve 12%.
Application scenarios 4
Referring to Fig. 1, Fig. 2, the heat circulation unit of one embodiment of this application scene, including evaporator 1, condenser 2, With heat exchange import 31, heat exchange outlet 32, take hot import 33, take heat outlet 34 heat converter 3, the heat exchange import 31 and Heat exchange outlet 32 is connected, and hot import 33 is taken to be connected with heat outlet 34 is taken；The heat exchange import 31 of the heat converter 3 is made for Enter for the heat source medium that waste heat exhausts, heat exchange outlet 32 is connected to the evaporation import 11 of the evaporator 1；Heat converter 3 take hot import 33 for taking thermal medium to enter, and take the heat outlet 34 to be connected to the condensation import 21 of the condenser 2；The steaming The media outlet for sending out device 1 is waste heat outlet 12, and the media outlet of condenser 2 is heat supply mouth 22.
Preferably, the heat converter 3 take heat outlet the 34 heat supply mouths 22 by bypass line and the condenser 2 Connection.
The operation principle of the present invention is that：Evaporator 1 is drawn into the heat of wherein heat source medium, makes inside evaporator 1 Heat transfer medium flashes to the steam of heat-transfer working medium, and steam passes through the compression of the compressor inside evaporator 1, and temperature and pressure is equal Rise become high temperature, high pressure steam, high temperature, high pressure steam using liquid is condensed into when condenser 2, discharge heat, The heat released, which is passed through in condenser 2, takes thermal medium to obtain, and the temperature of thermal medium is taken to increase in this way, and after discharging heat Liquid by decompression Returning evaporimeter 1 in, carry out cycle next time.
The above embodiment of the present invention can recycle the thermal energy in waste water, and be capable of providing the heat of equilibrium temperature Water, while the heat exchange efficiency and Energy Efficiency Ratio of heating system are substantially increased, efficiently solve above-mentioned technical problem.
Preferably, the heat exchange import 31 of the heat converter 3 be provided with the heat source medium to being exhausted as waste heat into The liquid storage device 4 that row is collected.
Liquid storage device 4 is arranged in this preferred embodiment, is conducive to carry out centralized collection to the waste water with temperature of discharge.
Preferably, the heat circulation unit further includes life appraisal device 5, and the life appraisal device 5 includes data preparation Module 51 and durability analysis prediction module 52, the data preparation module 51 are used to determine the actual measurement allusion quotation of heat circulation unit body The crack position of each actual crack, size on type loading spectrum, heat circulation unit body, and geometry simplification is carried out to various crackles Classification；The durability analysis prediction module 52 is used to carry out fatigue test to the material of the heat circulation unit body, obtains The material corresponds to the fatigue crack growth rate curve of various crackles, and then to actual measurement loads typical spectrum, each reality The crack position of crackle, the fatigue crack growth rate curve progress Crack growth analysis of size and various crackles, determining pair In the crack propagation life recurring number of various crackles the surplus of corresponding crackle should be determined further according to the crack propagation life recurring number The estimated value of remaining fatigue life, the estimated value of the final remanent fatigue life for determining heat circulation unit body.
Life appraisal device is arranged in this preferred embodiment, and constructs the structural framing of life appraisal device 5, can supervise in real time The health performance of calorimetric energy Cycle Unit increases the safety of heat circulation unit running.
Preferably, definition corresponds to crackle i=1, and the estimated value collection of the remanent fatigue life of 2 ... m is { P1,P2,…, Pi, the estimated value P of heat circulation unit body remanent fatigue lifeZIt is then：
PZ=minI=1,2 ... m{P1,P2,…,Pi}。
This preferred embodiment determines the remanent fatigue life and heat circulation unit body of heat circulation unit body Relationship between the remanent fatigue life of each actual crack, using the fatigue life of minimum actual crack as heat circulation machine The remanent fatigue life of group body, meets Law of Barrel, and accuracy is high.
Preferably, the material to the heat circulation unit body carries out fatigue test, obtains the material and corresponds to In the fatigue crack growth rate curve of various crackles, including：
1) stress intensive factor range for calculating various crackles considers that the plastically deforming area of crackle sharp-crested point can be to the tired of material Labor fracture has decisive impact, and crackle sharp-crested plastic zone, which is equivalent to a homogeneous containing phase transition strain, to be mingled with, definition Stress intensive factor range Δ KpcCalculation formula be：
In formula
Wherein,For the stress intensity factor through plastic correcting being calculated by maximum load in fatigue and cyclic load Value,For the stress intensity factor value through plastic correcting being calculated by minimum load in fatigue and cyclic load, KycIt is remote Stress intensity factor under field action, LOAD FOR when being opened completely by crackle obtain, Δ KscIndicate crackle sharp-crested plastic zone Caused stress intensity factor increment, A are the area around the plastic zone of crackle sharp-crested comprising are produced in crack propagation process Raw plastic deformation tail area, σ11、σ12、σ22For the stress in crackle sharp-crested plastic zone, by crackle sharp-crested plastic zone stress field Finite element method (fem) analysis obtain, R be tensile load and compressive load ratio；
2) fatigue crack growth rate curve for building various crackles considers temperature to fatigue based on Paris formula Crackle expands the influence of rate, and the modified computing formulae for defining the fatigue crack growth rate is：
T<0℃OR T>TmaxWhen,
0℃≤T≤TmaxWhen,
In formula, T is test temperature, TmaxFor the maximum temperature of setting, TmaxValue range be [35 DEG C, 40 DEG C], a be split Line extension length, N are cycle-index, and C and M are material constant, Δ KTTo be fitted crack propagation performance curved surface at improper temperature The improper temperature that post analysis obtains is broken threshold value, embodies influence of the temperature to spreading rate, and Δ KTValue range It needs to meet [0, Δ Kpc)。
This preferred embodiment defines stress intensive factor range Δ KpcCalculation formula, and consider the modeling of crackle sharp-crested point Property deformed area can have decisive impact the fatigue fracture of material, and crackle sharp-crested plastic zone is equivalent to one and contains phase The homogeneous for becoming strain is mingled with, to the stress intensive factor range Δ K of definitionpcIt can be work perfectly well as a rational mechanical parameter Analyze influence of the crackle sharp-crested plastic zone to stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that temperature The influence of rate is expanded to fatigue crack, and defines the modified computing formulae of fatigue crack growth rate, improves calculating Precision, and it is simple and practical.
Preferably, the calculation formula of the crack propagation life recurring number N is：
This preferred embodiment determines the calculation formula of crack propagation life recurring number N, improves the speed of life prediction.
The maximum temperature T of this application scene above-described embodimentmaxIt is set as 39 DEG C, to the fatigue of heat circulation unit body The precision of life prediction is opposite to improve 11%.
Application scenarios 5
Referring to Fig. 1, Fig. 2, the heat circulation unit of one embodiment of this application scene, including evaporator 1, condenser 2, With heat exchange import 31, heat exchange outlet 32, take hot import 33, take heat outlet 34 heat converter 3, the heat exchange import 31 and Heat exchange outlet 32 is connected, and hot import 33 is taken to be connected with heat outlet 34 is taken；The heat exchange import 31 of the heat converter 3 is made for Enter for the heat source medium that waste heat exhausts, heat exchange outlet 32 is connected to the evaporation import 11 of the evaporator 1；Heat converter 3 take hot import 33 for taking thermal medium to enter, and take the heat outlet 34 to be connected to the condensation import 21 of the condenser 2；The steaming The media outlet for sending out device 1 is waste heat outlet 12, and the media outlet of condenser 2 is heat supply mouth 22.
Preferably, the heat converter 3 take heat outlet the 34 heat supply mouths 22 by bypass line and the condenser 2 Connection.
The operation principle of the present invention is that：Evaporator 1 is drawn into the heat of wherein heat source medium, makes inside evaporator 1 Heat transfer medium flashes to the steam of heat-transfer working medium, and steam passes through the compression of the compressor inside evaporator 1, and temperature and pressure is equal Rise become high temperature, high pressure steam, high temperature, high pressure steam using liquid is condensed into when condenser 2, discharge heat, The heat released, which is passed through in condenser 2, takes thermal medium to obtain, and the temperature of thermal medium is taken to increase in this way, and after discharging heat Liquid by decompression Returning evaporimeter 1 in, carry out cycle next time.
The above embodiment of the present invention can recycle the thermal energy in waste water, and be capable of providing the heat of equilibrium temperature Water, while the heat exchange efficiency and Energy Efficiency Ratio of heating system are substantially increased, efficiently solve above-mentioned technical problem.
Preferably, the heat exchange import 31 of the heat converter 3 be provided with the heat source medium to being exhausted as waste heat into The liquid storage device 4 that row is collected.
Liquid storage device 4 is arranged in this preferred embodiment, is conducive to carry out centralized collection to the waste water with temperature of discharge.
Preferably, the heat circulation unit further includes life appraisal device 5, and the life appraisal device 5 includes data preparation Module 51 and durability analysis prediction module 52, the data preparation module 51 are used to determine the actual measurement allusion quotation of heat circulation unit body The crack position of each actual crack, size on type loading spectrum, heat circulation unit body, and geometry simplification is carried out to various crackles Classification；The durability analysis prediction module 52 is used to carry out fatigue test to the material of the heat circulation unit body, obtains The material corresponds to the fatigue crack growth rate curve of various crackles, and then to actual measurement loads typical spectrum, each reality The crack position of crackle, the fatigue crack growth rate curve progress Crack growth analysis of size and various crackles, determining pair In the crack propagation life recurring number of various crackles the surplus of corresponding crackle should be determined further according to the crack propagation life recurring number The estimated value of remaining fatigue life, the estimated value of the final remanent fatigue life for determining heat circulation unit body.
Life appraisal device is arranged in this preferred embodiment, and constructs the structural framing of life appraisal device 5, can supervise in real time The health performance of calorimetric energy Cycle Unit increases the safety of heat circulation unit running.
Preferably, definition corresponds to crackle i=1, and the estimated value collection of the remanent fatigue life of 2 ... m is { P1,P2,…, Pi, the estimated value P of heat circulation unit body remanent fatigue lifeZIt is then：
PZ=minI=1,2 ... m{P1,P2,…,Pi}。
This preferred embodiment determines the remanent fatigue life and heat circulation unit body of heat circulation unit body Relationship between the remanent fatigue life of each actual crack, using the fatigue life of minimum actual crack as heat circulation machine The remanent fatigue life of group body, meets Law of Barrel, and accuracy is high.
Preferably, the material to the heat circulation unit body carries out fatigue test, obtains the material and corresponds to In the fatigue crack growth rate curve of various crackles, including：
1) stress intensive factor range for calculating various crackles considers that the plastically deforming area of crackle sharp-crested point can be to the tired of material Labor fracture has decisive impact, and crackle sharp-crested plastic zone, which is equivalent to a homogeneous containing phase transition strain, to be mingled with, definition Stress intensive factor range Δ KpcCalculation formula be：
In formula
Wherein,For the stress intensity factor through plastic correcting being calculated by maximum load in fatigue and cyclic load Value,For the stress intensity factor value through plastic correcting being calculated by minimum load in fatigue and cyclic load, KycIt is remote Stress intensity factor under field action, LOAD FOR when being opened completely by crackle obtain, Δ KscIndicate crackle sharp-crested plastic zone Caused stress intensity factor increment, A are the area around the plastic zone of crackle sharp-crested comprising are produced in crack propagation process Raw plastic deformation tail area, σ11、σ12、σ22For the stress in crackle sharp-crested plastic zone, by crackle sharp-crested plastic zone stress field Finite element method (fem) analysis obtain, R be tensile load and compressive load ratio；
2) fatigue crack growth rate curve for building various crackles considers temperature to fatigue based on Paris formula Crackle expands the influence of rate, and the modified computing formulae for defining the fatigue crack growth rate is：
T<0℃OR T>TmaxWhen,
0℃≤T≤TmaxWhen,
In formula, T is test temperature, TmaxFor the maximum temperature of setting, TmaxValue range be [35 DEG C, 40 DEG C], a be split Line extension length, N are cycle-index, and C and M are material constant, Δ KTTo be fitted crack propagation performance curved surface at improper temperature The improper temperature that post analysis obtains is broken threshold value, embodies influence of the temperature to spreading rate, and Δ KTValue range It needs to meet [0, Δ Kpc)。
This preferred embodiment defines stress intensive factor range Δ KpcCalculation formula, and consider the modeling of crackle sharp-crested point Property deformed area can have decisive impact the fatigue fracture of material, and crackle sharp-crested plastic zone is equivalent to one and contains phase The homogeneous for becoming strain is mingled with, to the stress intensive factor range Δ K of definitionpcIt can be work perfectly well as a rational mechanical parameter Analyze influence of the crackle sharp-crested plastic zone to stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that temperature The influence of rate is expanded to fatigue crack, and defines the modified computing formulae of fatigue crack growth rate, improves calculating Precision, and it is simple and practical.
Preferably, the calculation formula of the crack propagation life recurring number N is：
This preferred embodiment determines the calculation formula of crack propagation life recurring number N, improves the speed of life prediction.
The maximum temperature T of this application scene above-described embodimentmaxIt is set as 40 DEG C, to the fatigue of heat circulation unit body The precision of life prediction is opposite to improve 10%.
Finally it should be noted that use above scene is merely illustrative of the technical solution of the present invention, rather than to the present invention The limitation of protection domain, although being explained in detail to the present invention with reference to preferred application scene, the ordinary skill people of this field Member is it should be appreciated that can be modified or replaced equivalently technical scheme of the present invention, without departing from technical solution of the present invention Spirit and scope.

Claims (3)

1. heat circulation unit, characterized in that including evaporator, condenser, have heat exchange import, heat exchange outlet, take hot import, The heat converter for taking heat to export, the heat exchange import are connected with heat exchange outlet, and hot import is taken to be connected with heat outlet is taken；Institute The heat exchange import for stating heat converter is provided as the heat source medium entrance that waste heat exhausts, the evaporation of heat exchange outlet and the evaporator Use inlet communication；Heat converter takes heat to take thermal medium to enter into confession, take the condensation of heat outlet and the condenser with into Mouth connection；The media outlet of the evaporator is waste heat outlet, and the media outlet of condenser is heat supply mouth；The heat circulation Unit further includes life appraisal device, and the life appraisal device includes data preparation module and durability analysis prediction module, the number It is used to determine the actual measurement loads typical spectrum of heat circulation unit body according to preparation module, each on heat circulation unit body actually splits The crack position of line, size, and geometry simplification classification is carried out to various crackles；The durability analysis prediction module is used for described The material of heat circulation unit body carries out fatigue test, obtains crack Propagation speed of the material corresponding to various crackles Rate curve, and then the fatigue of the actual measurement loads typical spectrum, the crack position of each actual crack, size and various crackles is split Line spreading rate curve carries out Crack growth analysis, determines the crack propagation life recurring number corresponding to various crackles, further according to The crack propagation life recurring number determines the estimated value of the remanent fatigue life of corresponding crackle, final to determine heat circulation unit The estimated value of the remanent fatigue life of body；The material to the heat circulation unit body carries out fatigue test, obtains The material corresponds to the fatigue crack growth rate curve of various crackles, including：
1) the stress intensive factor range Δ K of various crackles is calculatedpc；
2) fatigue crack growth rate curve for building various crackles considers temperature to fatigue crack based on Paris formula The influence of rate is expanded, the modified computing formulae for defining the fatigue crack growth rate is：
T<0℃OR T>TmaxWhen,
0℃≤T≤TmaxWhen,
In formula, T is test temperature, TmaxFor the maximum temperature of setting, TmaxValue range be [35 DEG C, 40 DEG C], a be crackle expansion Length degree, N are cycle-index, and C and M are material constant, Δ KTDivide to be fitted at improper temperature after crack propagation performance curved surface Obtained improper temperature fracture threshold value is analysed, influence of the temperature to spreading rate, and Δ K are embodiedTValue range need to expire Foot [0, Δ Kpc)。
2. heat circulation unit according to claim 1, characterized in that the heat converter takes heat outlet to pass through one Bypass pipe is connected to the heat supply mouth of the condenser.
3. heat circulation unit according to claim 2, characterized in that the heat exchange import of the heat converter is provided with To the liquid storage device being collected by the heat source medium exhausted as waste heat.
CN201610625247.1A 2016-07-30 2016-07-30 Heat circulation unit Active CN106247691B (en)

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