CN103925627B - A kind of heating system - Google Patents
A kind of heating system Download PDFInfo
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- CN103925627B CN103925627B CN201410129448.3A CN201410129448A CN103925627B CN 103925627 B CN103925627 B CN 103925627B CN 201410129448 A CN201410129448 A CN 201410129448A CN 103925627 B CN103925627 B CN 103925627B
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Abstract
The invention provides a kind of radiator, radiator comprises finned tube, and described finned tube is circular arc closed finned tube, and the closure plate of finned tube diminishes gradually along the height of base tube. The present invention can improve the structure of radiator, makes it reach heat exchange efficiency and maximizes, and to save the energy, reaches the object of environmental protection and energy saving.
Description
Technical field
The invention belongs to field of heat exchangers, relate in particular to a kind of radiator of structure optimization, belong to F28 field.
Background technology
At present in heating system, employing gradually according to the mode of heat charging, but at present according to heat chargingFee and how carrying out the stage that the control of heat is but being explored always, the present invention is just to provide one and has heat controlThe therrmodynamic system of system.
In addition, in radiator, be suitable for widely at present finned tubular radiator, can expand area of dissipation by fin, increaseStrong heat transfer effect, but all quality of influencer's radiating effect of the setting of the fansink-type of finned tube and finned tube parameter,And current in the situation that of energy crisis, urgent need will be saved the energy, meets social sustainable development, therefore needs to develop onePlant new finned tube, need the structure of finned tube to be optimized simultaneously, make it reach heat exchange efficiency and maximize, to save energySource, reaches the object of environmental protection and energy saving.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of new therrmodynamic system with heat control.
To achieve these goals, technical scheme of the present invention is as follows: a kind of heating system, comprise heating plant feed pipe,Heating plant return pipe, control valve, inflow temperature sensor, leaving water temperature sensor, heat exchanger, hot user's flow pipe, heat are usedFamily return pipe, user's radiator, water circulating pump, flowmeter, calorimeter, Programmable Logic Controller, is characterized in that, thermal source feed pipeBe connected with heat exchanger, on heating plant feed pipe, control valve be set, for regulating the hot water amount who enters heat exchanger, regulatingInflow temperature sensor is set, for measuring the inflow temperature of heat exchanger on the pipeline between valve and heat exchanger;
Heat exchanger is connected with hot user's feed pipe and hot user's return pipe, hot user's feed pipe and hot user's return pipe itBetween connect user's radiator, the water of hot user's return pipe by with heat exchanger in the hot water that provides of heating plant indirectly changeHeat, and then arrive in user's radiator and heat by hot user's feed pipe; Described water circulating pump is arranged on user's heat radiationOn hot user's return pipe between device and heat exchanger;
Heat exchanger is connected with heating plant return pipe, on heating plant return pipe, flowmeter is set, for detection of heating plantThe flow of the water in return pipe; On the heating plant return pipe between flowmeter and heat exchanger, set out water temperature sensor,For measuring the leaving water temperature of heat exchanger;
Calorimeter carries out data with inflow temperature sensor, leaving water temperature sensor and flowmeter and is connected, and according to measurementThe flow of inflow temperature, leaving water temperature and water calculate hot user's the heat expending;
Described Programmable Logic Controller carries out data with water circulating pump, calorimeter and control valve and is connected, for to therrmodynamic systemAutomatically control; The data that calorimeter uses user's heat pass to Programmable Logic Controller, Programmable Logic Controller basisThe heat that user buys contrasts with the heat using at present, if heat is finished, Controlled by Programmable Controller regulatesValve cuts out completely;
Hot user's feed temperature sensor is set on hot user's feed pipe, for detection of hot user's feed temperature, gives water temperatureDegree sensor carries out data with Programmable Logic Controller and is connected; In the time that Controlled by Programmable Controller control valve cuts out, recirculated waterPump continues operation, and the feed temperature detecting when feed temperature sensor reaches certain limit and cannot use time, control able to programmeDevice progressively slows down water circulating pump and finally stops the operation of water circulating pump;
Programmable Logic Controller calculates the remaining heat of user automatically, when user's heat surplus reaches the first dataWait, Programmable Logic Controller is adjusted control valve to the first aperture lower than normal aperture; Reach lower than in user's heat surplusWhen the second data of one data, Programmable Logic Controller is adjusted control valve to the second aperture lower than the first aperture; UserWhen heat surplus reaches lower than the 3rd data of the second data, Programmable Logic Controller is adjusted control valve to opening lower than secondThe 3rd aperture of degree; When user's heat surplus reaches the 4th data lower than the 3rd data, Programmable Logic Controller is adjustedWhole control valve is to the 4th aperture lower than the 3rd aperture; Reach lower than the 5th data of the 4th data in user's heat surplusTime, Programmable Logic Controller is adjusted control valve to the 5th aperture lower than the 4th aperture; User's heat surplus reach lower thanWhen the 6th data of the 5th data, Programmable Logic Controller is adjusted control valve to the 6th aperture lower than the 5th aperture; FinallyReach and approach in zero in user's heat surplus, Programmable Logic Controller is adjusted control valve and is closed completely.
Compared with prior art, the present invention has advantages of as follows:
1) the invention provides a kind of new heating system that can carry out heat control, buy heat by user oneself,Once heat is finished, automatically stop heating.
2) stop after heating, water pump, maintains original state and continues operation, by Programmable Logic Controller detect hot user toCoolant-temperature gage, is reduced to certain limit and cannot use time, Programmable Logic Controller triggers halt command at feed temperature, by subtractingSlow down circulating pump final shutdown. this operation is mainly in the time that hot user network is larger, make full use of in system pipeline more thanHeat.
3) when user buys heat and is about to be finished, system is carried out reminding user by progressively reducing heating amount, usesFamily is bought in time.
4) the present invention is by test of many times, and design the fin of different tube diameters, differing heights, angle and tested, therebyObtain an optimum fin optimum results, and verify by test, thereby proved the accuracy of result.
5) space surrounding by the outside fin of user's radiator dwindles gradually along the circulating direction of extraneous air, withIncrease the chimney effect that fin forms.
6) test of many times is carried out in the space surrounding of outside fin and design, shown that the curve of outside fin is thrownThe trend that thing is linear, has reached optimum chimney effect.
7) research and develop new radiator base tube and the material of fin, strengthened heat transfer.
Brief description of the drawings
Fig. 1 is the schematic diagram of therrmodynamic system of the present invention;
Fig. 2 is the schematic diagram of user's radiator of the present invention;
Fig. 3 is the cross sectional representation of finned tube;
Fig. 4 is the schematic diagram of an embodiment seeing from left side of Fig. 3;
Fig. 5 is the embodiment schematic diagram of an optimization seeing from left side of Fig. 3;
Fig. 6 is the embodiment schematic diagram of another optimization of seeing from left side of Fig. 3.
Reference numeral is as follows:
1 heating plant feed pipe, 2 heating plant return pipes, 3 control valves, 4 flowmeters, 5 inflow temperature sensors, 6 leaving water temperaturesSensor, 7 heat exchangers, 8 hot user's feed pipes, 9 hot user's return pipes, 10 circulating pumps, 11 calorimeters, 12 controls able to programmeDevice, 13 real operation interfaces, 14 upper headers, do not have the part of fin in 15 base tubes, 16 finned tubes, 17 lower collector pipe, 18 base tubes,19 first fins, 20 gaps, 21 first braces, 22 second fins, 23 the 4th fins, 24 the 3rd fins, 25 second connectContact pin.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
As shown in Figure 1, a kind of therrmodynamic system of automatic control heat supply, comprises heating plant feed pipe 1, heating plant backwaterPipe 2, control valve 3, inflow temperature sensor 5, leaving water temperature sensor 6, heat exchanger 7, hot user's flow pipe 8, hot user returnWater pipe 9, user's radiator, circulating pump 10, flowmeter 4, calorimeter 11, Programmable Logic Controller 12, described thermal source feed pipe 1 withHeat exchanger 7 connects, and control valve 3 is set on heating plant feed pipe 1, for regulating the flow of the hot water that enters heat exchanger 7,On the pipeline between control valve 3 and heat exchanger 7, inflow temperature sensor 5 is set, for measuring the water inlet temperature of heat exchanger 7Degree;
Heat exchanger 7 is connected with hot user's feed pipe 8 and hot user's return pipe 9, hot user's feed pipe 8 and hot user's backwaterPipe connects hot user's radiator (referring to Fig. 2) between 9, the water of hot user's return pipe 9 by with heat exchanger 7 in heating plant carryThe hot water of confession carries out heat exchange, and then is arrived in user's radiator and heated by hot user's feed pipe 8; Described circulating pump 10Be arranged on hot user's return pipe 9;
Heat exchanger 7 is connected with heating plant return pipe 2, flowmeter 4 is set on heating plant return pipe 2, for detection of heatThe flow of the water in source factory return pipe 2; On the heating plant return pipe 2 between flowmeter 4 and heat exchanger 7, set out coolant-temperature gageSensor, for measuring the leaving water temperature of heat exchanger 7;
Described calorimeter 11 carries out data with inflow temperature sensor 5, leaving water temperature sensor 6 and flowmeter 4 and is connected, andCalculate hot user's the heat expending according to the flow of inflow temperature, leaving water temperature and the water measured;
Described Programmable Logic Controller 12 carries out data with circulating pump 10, calorimeter 11 and control valve 4 and is connected, for to heating powerSystem is controlled automatically; The data that calorimeter 11 uses user's heat pass to Programmable Logic Controller 13, programmable controlThe heat that device 13 processed is bought according to user contrasts with the heat using at present, if heat is finished, and control able to programmeDevice control and regulation valve cuts out completely;
Hot user's feed temperature sensor is set on hot user's feed pipe, for detection of hot user's feed temperature, gives water temperatureDegree sensor carries out data with Programmable Logic Controller and is connected; In the time that Controlled by Programmable Controller control valve cuts out, recirculated waterPump continues operation, and the feed temperature detecting when feed temperature sensor reaches certain limit and cannot use time, control able to programmeDevice progressively slows down the defeated pump of circulation and finally stops the operation of water circulating pump.
Circulating pump is not shut down, maintain original state and continue operation, by Programmable Logic Controller detect hot user to water temperatureDegree, is reduced to certain limit and cannot use time, Programmable Logic Controller triggers halt command at feed temperature, slows down by subtractingCirculating pump final shutdown. this operation is mainly in the time that hot user network is larger, makes full use of in system pipeline as far as possibleWaste heat.
Above-mentioned therrmodynamic system can also comprise display operating panel, and real operation panel class can be looked into for userThe operations such as heat are bought in inquiry, payment.
Calorimeter can be real-time the heat that user is used offer Programmable Logic Controller, also can be when certainBetween provide, carry out lump-sum settlement for example every day.
Programmable Logic Controller calculates the remaining heat of user automatically, when user's heat surplus reaches the first dataWait, Programmable Logic Controller is adjusted control valve to the first aperture lower than normal aperture; Reach lower than in user's heat surplusWhen one data the second data, Programmable Logic Controller is adjusted control valve to the second aperture lower than the first aperture; In user's heatAmount surplus is when reaching lower than the second data the 3rd data, and Programmable Logic Controller is adjusted control valve to lower than the second apertureThe 3rd aperture; When user's heat surplus reaches lower than the 3rd data the 4th data, Programmable Logic Controller adjustment regulatesValve is to the 4th aperture lower than the 3rd aperture; When user's heat surplus reaches lower than the 4th data the 5th data, canProgrammable controller is adjusted control valve to the 5th aperture lower than the 4th aperture; Reach lower than the 5th data in user's heat surplusWhen the 6th data, Programmable Logic Controller is adjusted control valve to the 6th aperture lower than the 5th aperture; Finally at user's heatSurplus reaches when approaching zero, and Programmable Logic Controller is adjusted control valve and closed completely.
Programmable Logic Controller, by the operation of the above-mentioned operate power of progressively closing control valve and reduction pump, can be to supplyWarm stopping progressively, user just can feel that heating amount is in decline gradually like this, thereby makes it know the heat that you buyClose on and be finished, need to buy as early as possible.
Above-mentioned operation can complete in regular hour section, for example in several days or in the week, completes, thisSample user could feel the minimizing of heating amount gradually, thereby reminds him initiatively to buy heat.
Above-mentioned user's operation can realize by network, thereby realizes without cassette heat charging administration system, has realizedWhat charge and heat supply network were supplemented with money transmits without card, and hot user obtains the payment password of obtaining according to payment number after Online Payment,And in unit operation hypervisor, supplement with money within a certain period of time, supplement the rear amount of money and password with money and all lost efficacy, thereby greatly reduceFinancial risks in heat supply network charge.
Certainly, user also can directly use Web bank to buy operation by real operation panel.
Certainly, the present invention also provides a kind of radiator, and this kind of radiator can be used as an independent radiator productProtect.
Described hot user's radiator is finned tubular radiator, comprises upper header 14, lower collector pipe 17 and is connected upper header 14With the finned tube 16 of lower collector pipe 17, described finned tube 16 comprises circular base tube 18 and the first fin 19, the second fin 22, the first wingsThe extended line outside and the first fin 19 and the second fin 22 that sheet 19 and the second fin 22 are arranged on base tube 18 intersects at baseThe central axis of the base tube at pipe 18 place, the center of circle, the first fin 19 and the second fin 22 are along by the of base tube central axisOne plane B mirror image symmetry; Described finned tube comprises the 3rd fin 24 and the 4th fin 23, described the 3rd fin 24, the 4th fin23 along the second plane C respectively with the first fin 19 and the second fin 22 mirror image symmetries, described the second plane C and the first plane BVertical and through the central axis of base tube 18; Between described the first fin 19 and the second fin 22, the first brace 21 is set,It is circle that the second brace 25, the first braces 21 and the second brace 25 are set between described the 3rd fin 24 and the 4th fin 27Camber metallic plate; The central axes of the central axis of described circular arc-shaped metal plate and base tube 18; Described base tube is straight tube, instituteThe central axis of stating adjacent base tube is parallel to each other.
Preferably, the first fin of adjacent base tube is parallel to each other, represents that the second fin of adjacent base tube is also parallel to each other,In like manner, the 3rd fin, the 4th fin are also parallel to each other. This feature shows that finned tube arranges according to equidirectional.
It should be explained that, as shown in Figure 3, the central axis of base tube is exactly the collection of the centre point on the cross section of base tube 18Close a line of formation, the central axis of circular arc-shaped metal plate is exactly the set shape of the centre point of circular arc-shaped metal plate on cross sectionThe line becoming. The central axes of the central axis of described circular arc-shaped metal plate and base tube 18 just refers on cross section,Circular arc-shaped metal plate and base tube are concentric circles.
Preferably, the size of all finned tubes is all identical.
By above-mentioned setting, make to form between fin and brace a gap 20, heat convection timeWait, gap 20 has just formed a kind of chimney effect, can strengthen heat exchange.
The 3rd fin of the first fin, the second fin and adjacent fins pipe and the 4th fin form space, and this space formsCertain space, can form chimney effect, adds strong convection, augmentation of heat transfer.
Angle between described the first fin and the second fin is A, and the length of the first fin and the second fin is L, base tubeOuter radius be R, certainly, because mirror image symmetry, the length of the 3rd fin and the 4th fin is also L naturally. But in practiceTo find, if in heat transfer process. fin angle is too small, can hinder heat exchange, because fin angle is too small, causes the first wingThe distance of sheet, the second fin is too near, and temperature boundary layer starts in the direction along with base tube height to overlap in closed area, gasTemperature approach tube wall temperature and move closer to heat saturated, flow resistance increase, finally worsen on the contrary heat exchange, the advantage of outer finNot out, same reason, along with the constantly increase of angle, makes brace originally nearer apart from the distance of base tube in performance,Make equally temperature boundary layer in closed area, in the direction along with base tube height, start to overlap, gas temperature approaches tube wall temperatureDegree and move closer to heat saturated, flow resistance increase, finally worsen on the contrary heat exchange, therefore angle has an optimum value.
For finned length, if oversize, even because the heat of base tube cannot arrive in time fin end orBe effective also not obvious, if too short, expand heat exchange area too little, cannot reach good heat transfer effect, therefore a wingThe height of sheet also has an optimum value.
For the distance between two finned tubes, if first distance is too near or completely close, two finned tubesBetween brace, the space of distance (referring to Fig. 2) is too little, and air cannot enter between finned tube by the gap between finThe space forming, heat exchange now can only rely on from radiator bottom and enter air, cannot reach good heat convection effect,Same reason, if the distance is too far, and the one the second the 3 4th fins of finned tube cannot form effective chimney effectSpace, thus heat transfer effect variation caused, therefore also need a suitable numerical value for the distance between two finned tubes.
As shown in Figure 3, for fin along base tube the height H on axially, also need to have a suitable numerical value, ifFin height is too high, on the top of fin, because boundary layer starts in the direction along with base tube height heavily in closed areaClose, cause the deterioration of heat exchange, in like manner, highly too low, heat exchange is not given full play to, thereby affects heat transfer effect.
Therefore, the present invention is the best radiator that sums up of the test data of the radiator by multiple different sizesThe size relationship of finned tube. Because finned tube also has included angle A, these three variablees of finned length L, fin height H, therefore, introduceTwo characteristic sin (A/2), L/R, H/R, R is the radius of base tube here, the heat dissipation capacity maximum from heat transfer effect,Nearly 200 kinds of forms are calculated. Described size relationship is as follows:
Angle between described the first fin and the second fin is A, and the length of the first fin and the second fin is L, base tubeOuter radius be R, the fin height H along base tube on axially, above-mentioned four relation meets following formula:
Sin(A/2)=a×(L/R)2+b×(L/R)+c
H/(R×10)=e×Sin(A/2)2Wherein, A unit is angle to-f × Sin (A/2)+h, 60 ° < A < 110 °,
L is of a size of mm, 12mm < L < 80mm,
The unit of R is mm, 10mm < R < 80mm,
The unit of H is mm, 800mm < H < 1200mm,
A, b, c, e, f, h are coefficient, and the scope of a is 0.04-0.042, and the scope of b is 0.266-0.28, and the scope of c is0.36-0.37, the scope of e is 21-23, and the scope of f is 44-45, and h is 23-25.
By testing after result of calculation, by the numerical value of computation bound and median, the result of gained is basic againUpper and formula matches, and error is substantially in 4%, and maximum relative error is no more than 6%, and mean error is 2%. ;
The optimum of coefficient optimization is: a is that 0.0412, b is that 0.02715, c is that 0.03628, e is that 22, f is 44.37,H is 23.86.
Preferably, the distance between adjacent base tube central axis is S=d × (L+R) × sin (A/2), and wherein d is 1.1-1.2。
As shown in Figure 3, the distance between adjacent base tube central axis is exactly the distance between two base tube centers of circle on cross sectionFrom.
The optimum results of d is 1.118.
As one preferably, described heat exchanger 7 is heat-exchangers of the plate type.
As one preferably, as shown in Figure 5,6, the first fin of described radiator and the finned length of the second fin fromThe bottom of user's radiator diminishes gradually to top. By such setting, can make air flowing in the space of finIn process, gap 20 areas are more and more less, thereby make its flow velocity more and more faster, and chimney effect is more and more obvious, thereby increaseStrong heat exchange.
As one preferably, the first fin of described radiator and the finned length of the second fin are from user's radiatorThe amplitude that bottom diminishes gradually to top is more and more lower. Experiment showed, in radiator, by such setting, heat transfer effect is wantedObviously be better than the amplitude that changes constant or become gradually large situation.
As one preferably, the first fin of described radiator and the finned length of the second fin are from user's radiatorBottom is parabolic structure to top. This set is that fairshaped effect has been played in the variation of fin, reaches best heat exchangeEffect because bottom extension goes out a part, makes more air enter gap simultaneously.
For two kinds of situations of Fig. 5 and Fig. 6, the fin of radiator still can adopt described the first fin and the second finBetween angle be A, the length of the first fin and the second fin is L, the outer radius of base tube is R, the wing along base tube on axiallyThe formula that sheet height H is satisfied, but consider ease of processing can finned tube be divided into several parts in short transverse,Every part is taked average fin height H, but length L remains unchanged, and adopts the mode of total length, by average wingSheet height is determined included angle A.
Can certainly, directly by adopting average finned length, calculate an angle, protect along the height angle of finHold constant.
Certainly, in particular cases, because the difficulty of manufacturing, fin also not necessarily leaves no choice but meet the excellent of above-mentioned several parametersChange formula, also can be set to be convenient to the mode of manufacture, for example as shown in Figure 6, the mode that fin is straight line, length keeps alwaysConstant, but circular arc closure plate is apart from the distance in the center of circle of finned tube base tube, constantly reduces along the height of base tube.
As preferably, circular arc closure plate, apart from the distance in the center of circle of finned tube base tube, is in short transverseThe streamlined variation of parabolic because bottom extension goes out a part, makes more air enter gap simultaneously
Certainly, the embodiment of Fig. 6, also can meet the formula of above-mentioned optimization, but manufactures cumbersome.
Preferably aluminium alloy of the material of base tube and fin, the mass percent of the component of described aluminium alloy is as follows: 1.4%Cu，2.8％Mg，3.2％Ag，1.2％Mn，0.42％Zr，0.15％Fe，1.18％Ti，18.38％Si，0.4%Cr, 1.1%Ni, all the other are Al.
The manufacture method of aluminium alloy is: adopt vacuum metallurgy melting, argon for protecting pouring becomes circle base, through 600 DEG C evenlyChange and process, at 400 DEG C, adopt and be hot extruded into bar, and then after 580 DEG C of solution hardening, carry out artificial aging at 200 DEG CProcess. Thermal conductivity factor for being greater than 250W/ (m*k) under 50-70 degree celsius temperature.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this. Any art technologyPersonnel, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention shouldWhen being as the criterion with claim limited range.
Claims (1)
1. a heating system, comprises heating plant feed pipe, heating plant return pipe, control valve, inflow temperature sensor, goes out water temperatureDegree sensor, heat exchanger, hot user's flow pipe, hot user's return pipe, user's radiator, water circulating pump, flowmeter, heatTable, Programmable Logic Controller, is characterized in that, thermal source feed pipe is connected with heat exchanger, on heating plant feed pipe, adjusting is setValve for regulating the hot water amount who enters heat exchanger, arranges inflow temperature and passes on the pipeline between control valve and heat exchangerSensor, for measuring the inflow temperature of heat exchanger;
Heat exchanger is connected with hot user's feed pipe and hot user's return pipe, between hot user's feed pipe and hot user's return pipe, connectsConnect user's radiator, the water of hot user's return pipe by with heat exchanger in the hot water that provides of heating plant carry out indirect heat exchange,And then arrive in user's radiator and heat by hot user's feed pipe; Described water circulating pump be arranged on user's radiator andOn hot user's return pipe between heat exchanger;
Heat exchanger is connected with heating plant return pipe, on heating plant return pipe, flowmeter is set, for detection of heating plant backwaterThe flow of the water in pipe; On the heating plant return pipe between flowmeter and heat exchanger, set out water temperature sensor, forMeasure the leaving water temperature of heat exchanger;
Calorimeter carries out data with inflow temperature sensor, leaving water temperature sensor and flowmeter and is connected, and according to entering of measuringThe flow of coolant-temperature gage, leaving water temperature and water calculates hot user's the heat expending;
Described Programmable Logic Controller carries out data with water circulating pump, calorimeter and control valve and is connected, for therrmodynamic system is carried outAutomatically control; The data that calorimeter uses user's heat pass to Programmable Logic Controller, and Programmable Logic Controller is according to userThe heat of buying contrasts with the heat using at present, if heat is finished, Controlled by Programmable Controller control valve entersRow is closed completely;
Hot user's feed temperature sensor is set on hot user's feed pipe, and for detection of hot user's feed temperature, feed temperature passesSensor carries out data with Programmable Logic Controller and is connected; In the time that Controlled by Programmable Controller control valve cuts out, water circulating pump continuesReforwarding row, the feed temperature detecting when feed temperature sensor reaches certain limit and cannot use time, Programmable Logic Controller byThe slow water circulating pump of step also finally stops the operation of water circulating pump;
Programmable Logic Controller calculates the remaining heat of user automatically, when user's heat surplus reaches the first data, and canProgrammable controller is adjusted control valve to the first aperture lower than normal aperture; Reach lower than the first data in user's heat surplusThe second data time, Programmable Logic Controller is adjusted control valve to lower than the second aperture of the first aperture; Surplus at user's heatWhen surplus reaches lower than the 3rd data of the second data, Programmable Logic Controller is adjusted control valve to lower than the of the second apertureThree apertures; When user's heat surplus reaches the 4th data lower than the 3rd data, Programmable Logic Controller adjustment regulatesValve is to the 4th aperture lower than the 3rd aperture; When user's heat surplus reaches the 5th data lower than the 4th data,Programmable Logic Controller is adjusted control valve to the 5th aperture lower than the 4th aperture; Reach lower than the 5th number in user's heat surplusAccording to the 6th data time, Programmable Logic Controller is adjusted control valve to lower than the 6th aperture of the 5th aperture; Finally userHeat surplus reaches when approaching zero, and Programmable Logic Controller is adjusted control valve and closed completely.
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| CN201410129448.3A CN103925627B (en) | 2014-04-02 | 2014-04-02 | A kind of heating system |
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| CN201410129448.3A CN103925627B (en) | 2014-04-02 | 2014-04-02 | A kind of heating system |
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| JP2000039231A (en) * | 1998-07-22 | 2000-02-08 | Sanyo Electric Co Ltd | Heat transfer pipe and absorption refrigerating machine using the same |
| JP4517604B2 (en) * | 2003-08-21 | 2010-08-04 | 住友金属工業株式会社 | Manufacturing method of stainless steel tube with outer surface spiral fin and stainless tube with outer surface spiral fin |
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| CN201697087U (en) * | 2010-06-22 | 2011-01-05 | 四川新力光源有限公司 | Radiator for LED lamp |
| CN103512391A (en) * | 2013-09-27 | 2014-01-15 | 山东大学 | Arc-shaped enclosed finned tube |
| CN103528394A (en) * | 2013-09-27 | 2014-01-22 | 山东大学 | Arc-shaped sealing type finned tube radiator |
| CN103542736A (en) * | 2013-09-27 | 2014-01-29 | 山东大学 | Inner-fin arc-shaped closed-type finned pipe radiator |
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