HUE027816T2

HUE027816T2 - Arrangement with storage element and heat supply system

Info

Publication number: HUE027816T2
Application number: HUE12822971A
Authority: HU
Inventors: Lubor Chytil
Original assignee: Az - Pokorny Trade S R O
Priority date: 2011-12-22
Filing date: 2012-12-21
Publication date: 2016-11-28
Also published as: WO2013091891A3; WO2013091891A4; EA027321B1; EP2795133A2; SI2795133T1; DK2795133T3; DE102011056866A1; WO2013091891A2; ES2579152T3; EP2795133B1; EA201400732A1; PL2795133T3

Description

Arrangement with storage element and heat supply system l>8i5Grîpt!on

The inyemidn a storage element atid a heat supply system;

It is known that heat generators, such-as heaih% boiersyhave to he seated with a: hitter heat output than the predicted overall hegt demand in the corresponding heat supply system. This is because the heat generator in such heat supply systems must always be designed aecohfing to

If a heat supply system sealed aee®dih| to this design rule is operated with a soiidi lkei hoher, diilehities with the heat balancing inside such & system result therefrom.

According to a proposal in CM 342 SM, there shouldtherefore he aSsigped tO Speh 8 heat supply system a heat storage element which is connected tn parallel to ihe existing heat consumers psafmg elements). The incarpora? takes place in atteh ease % means of a three-way valve itt the How line and re-turn flow íme of the heat supply system and by momts of forced circulation with a thennostat-eontmlled eiretdah ing pump in the consumer circuit of the heat supply system.

Depending no the position of the three-way val ves, either the eonssmer circuit. the heat storage element or both can he put Mo operation.

In the case of operation of the eonstítöeh ételt together with the heat storage elemenh utt oteÄg {h|tme emerges ndueh extracts the required lipid quantities virtually optionally either morn the solid foe? boiler or the heat storage element or boti). A hydraulic compensation is not provided. The proposed system can thus only be operated: expediently in a way such that the hot water storage tank is directly charged by the solid Kiel boiler with a corresponding valve setting, wherein the consumer circuit and the carctilatin|:pump <tre switched off with such in a switchiPi variât. The pump-free circulation thus arising lengthens the chaining iutctels.

The maio drawback with this heat supply system Éeretore consists in the foet that a hydraulic coruppsatioh:hud charging of the hsat storage element with a pressure flow are női possible. in particular, an excess supply of hsat ,quantities can also occur fon sottes* such as IP example thermal solar collector^ are connected to such a heat supply spietmifo paftiplar, consldefafeie: disparities arise between the supply of heat quantities and :tfte tee-off thereof In additioty them ;is the focftllat: the fhhmg between the heat generation and heat consumption is not coincident.

To inti 8: remedy for this, storage elements are present in heat supply sysfotm. said stoifofo element oflring the possibility, when there is a temporary oversuppiy of heat quantities, of feehtg able to temporarily store foeSe heat quantises and to retrieve them again later, in order to auabie this, heated medium has to he pippped in the direct tion of the storage element when there is an excessssupply. When there la ^lissame medium has to be pumped ia the reverse direction from the storage dement back into the heating circuit.

Ott account of the useful life of circulating pumps being reduced with high media températures, the latter have for some time only been incorporated in the liite section that always has the lower temperaturei This requires that two different tlow directions are required for charging, and discharging the heat storage element.

These tasks cannot feg performed with a circulating pump, which is usually a centrifugal pump or can only oper-ate Myom delivery direction, Heal supply systems have therefore already been designed, wherein two pumps with iß each case opposite delivery directions are connected in parallel in the line circuit between the heat source sad the heat; storage element. Μν&.ΐρ be assigned to said pumps if the medium is ai« ways to be delivered Only in one specific direction.

It is also knewp to dispose an electrically copfrohed two-way servo-valve in each pump branch m such pump in parallel, in order in this way to avoid a short circuit of the media flow via the pump that is at a standstill at the tune.

Such arrangements ate expensive, especially since they require still further control devices, which on die pite hatni open and close the line paths and on the other hand coniroi the two pumps.

An mtangemept with two pumps connected in series is proposed in PE 44 09 8831¾ said pumps each being counseled with their suction sides to the return flow line of a heat consutner. in this arrangement, a media flow can be connected in the^ return flow line Of a heat consumer to a pump with a heat generator peating boiler) or to another pump 'with a heat »rage element. In order to avoid feedbacks, a non-return waive is proposed in. ettch case in the return flowline of the beat consmsmani of the heat generator.

The system is of pumps and non-return valves again hm* to be provided in the case of fruiter heat also when a plurality of line cireuits to heat consumers are provided. The cost with -iïïereases very sharply. it is proposed in JÍT S38 28933: A .10: Operate a bireuiating pump located downstream of a heat source in the How line by means of a downstream; 4/3 valve, in such a way that a spécifié number®?heating:éídtseöfe'^sypplied with heated medium, on the öíte him| starting horn the first heating element and on the other hand, after switch-ing over the. 4/2 path valve, from the last heating elesnent,'The purpose of this arrangement ia:.íp be allô to rouiu-aily interchange' die flow line and flow return tine of a heat: supply system and: thus to ensure uniform: heating of all; the heating elements, A broader proposai makes provision such that the corresponding switelnovet is carried ottf automatically atflhed time intervals, A further proposal makes: provision snch,fitst, when ätr t^per limiting temperature in tbe healing elements is reached, s control signal is delivered to the control device by means of a heat sensor, said control signal then interrupting the supply to the heating elemenis.

The are&Hgemeni described above is used ekelusively ior switching over froth the flow line to the return How line in a conventional heating circuit, in order to achieve OntfOrm heating of ail: the heating elements present lit the circuit. The desefibed arrangement is not suitable for a reversal of the flow direction to: a supply line of an addiiioitai heat supply eiemcat.

An arrangement is known from BP 1 906 10 i Ai which, connects two pumps in each case with the pressure sule in a line, SO hist A specific flow direction is forced by switching on one of these pumps each time; The: media flow Hows through the pump that is out of operation at the time. Λ comparable arrangement is known from a Eco Zenith ï 555 Scat soppily system from the company GTC ÄB, 34iM:My»§by, ,&κβφ», In this system, additional nmiwetaro valvesaredispored between the two pomps connected with the pressure side»; despite the simpttftel dlegiibv-ài^^tangement bg$-:.t|c drawback that the pump that is out of operation at the titherepresents a cbnÂyàbie ütm resistance, which.forces an increase: in {he putnp output, F«tti?eraiofe,.it cam not be tuM mt that a correspondingly large media flow will cause corrosion anti eaMtatipn damage during die flow atonnd the impelier of the stationary pump. These drawbacks are fotther exacerbated if a fow also takes place through nunsfetum ygives. in addition to the pump,

Apart from the drawbacks indicated with the individual solutions existing in the prior art, there are further drawbacks. Systems whicb oponne with two pumps independent ofone another thus repuire a: sepsr^e eosproi, as a result of which the eontroi ouday iu suefe heat supply systems increasssi

If combinations with two circulating pumps are additionally equipped with eonfroilcd valves, the control outlay increases stilt farther.

Moreover, the synchronisation is lacking with the isdiyidual: componems of the systems existing in the prior art. Controlled valves or pumps generate knocking in the tine circuits. The hydraulic compensation la absent in many solutions.

In systems which place spcfol emphMis on obtainlug testewsbie energy with the aid of sofar-foarmal heat sources, the systems known f óm the : prior art cannot meet the requirements for a maximum energy pin Soffi these soumesyTb do this, if is necessary to dhtep-ate a secondary heat storage element for the fealaneip of the heat quantities inside a heat snppiy system, la such a way that said secondary heat storage element can supply heat quantities into the consumer circuit and remove them from the generator circuit as required and inertia-free, dire combi-storage elements with a large heat quantily buffer also known in the prior art and integrated as a heat sink Into heating circuits cannot meet the requirements. They am too sluggish in their behaviour. On the other hand, a heat sink With s lower inertia requires a rapid reaction by a secondary hot water storage tank, in ordCr to compensate appoximutcSy thesupply or lack of heat quantities widr respect do foe beating circuit of aheat slf-ply system. "I bis cannot be achieved with the pump arrangements known from the prior. ft is the problem of the invention, feeifore, to propose an arrangement which can handle the tasks of charging and discharging at supply systems with a low: cost, idstallatlon and control outlay, which opetafos In the opdmtmf maaner in terms surges, enables a hydraulic compensation and can be adapted in diverse wavs with regard to its Ägrmiou Info existing systems.

This problémáét outahove Is soived with an arrangement withthefeatures of the charactertsing patt of claim i in combination with the features of the preamble of this claim. Cioordmafod claims and subrelaims describe embodiments of the arrangemciU according to the invention. in dte foiiowfog descfl|uimt, the exarnpiss of embodiment anti tbc claims, the terms listed below am used with site following meanings:

Heat supply system -- wlueh comprises at least one heat gesemtoA a: heat consumer and n heat storage element chargeable and diselswgeable by means of a pump,

Pump sí?sí5gement~™ Is an assembly of at least one ponip having an arbitrary design, fee segmetsts and valves lev solving the problern. With a pumpunll for charging and discharging #e sterage eiemenf.

Storage element --- is a volume storage ciemoat of any size and design, which can be Charged and again dis-charged with a mediohf h^s|>ortmg heal quantities,

Backflow preventer — is a component or a subassembly winch is suitable Jnr allowing #e media how of the pmltp t o pass for the most part unhindered, bat is suitable for closing the line seoicat in the case of a sustained or pulsed counser llow in the pump line,

ControilaMe *** means that the ptmtp atrangeutent can be put into operation and be brought to a standstill on the basis of arbitrary deeistohs and interventions info the beat supply system.

Replatahle ^ in pump is put into operation or brought to a standstill depending on measured yah ;$fr g$& processed control vÄhlss or on the basis of processing routines of a ki|foer-!evei control system. Such kinds of control pump Mmugemem or esn.be constituted as a centrai control system of die heal supply system.

According: to the invention, it is assumed that a further optimisation of the use of thermal energy in heat .supply systems etui beachieved |?y the fact that a storage element additionally disposed in such a system is charged or discharged with only one pump with : low inertia, Ä previously used wsngemg»i®'^hvfcefö';.pÉp thus be-come unnecessary. ||ig irfvepiion: ip particular takes account: of those heat supply systems that are equipped with heat generators,: by iimeattiSs 0£--wh|i0Îi: quantities ipe obtained from renewable energies: and in which a so-ealled beat sink perforips the task :of making avalialde heat :quautliîe& for the headgg circuit, ffowevcr, the arrangement according : to the invention can also be used :ih ifohvehtional heat supply systems, if a secondary heat storage element is edditionäb •y provided in She latter,

Addition:*! resistances due to a second pomp, through which a flow must take place, cease fo be luyseut.,, Ifod likewise the installation and maintenance costs for a second pump. Furthermore, possible damage due to cavitation, cdttbSiob, and ageing is avoided wild the pumps respect ively put: out of operádon,

Aceordlbg to thé invention, the arrangement is constituted such that a mutual connection to the supplying and dischäfphg line ftps Is enabled^ with the aid of valves: or stopcocks: and foe delivery: direction of the pump can thus he switched within sbuflur Ifttcsvals:, Aéçotdingjto lire invention, this Iras: the advantage that only actuating pulses with low energy consuMptlon me required for actuating the valves or stopcocks, whilst the: pump cau deliver media itt thé optimtlm operation even after the switch-over. is order to be able to operate the pump in Ihe ppítmuín manner from the energy sfäßdpbim, the latter is con-trolled in a power-optimised manner. This means that the quantity of energy is always made available to the puiup that is necessary to mmotahrthe required pafomrters.

Particularpreforençe is given iô a eöppdi of the energy qxumthles :»f th« cfecnlafosg pumpfov controlling the of a pulse widdreoamo!, which it actuated by atudog; signais and which, nu the basis ihcreoh ascertains the energy quantities for the operation of the circulating pump.

Tim acquisition of analog signais by the arrangement of a temperature sensor at a point in the consumer circuit of the heat supply system is particularly advantageous, which advantageously comes into question for the ascertainment of a setpoint temperature- The charging or storage element Can fops be controlled almost tree from inertia sodfoe^ maimcnaftee of the tlicrümrtechniéal requirements can thus be eosored in a straightforward manner.

Such » control of the circuiating pump can be e^tstitütëd In parallel with a control Ißr-'^e^pat-^p^ystem or can be integrated into the iatter, A control of the energy quantiiieshymeans of a so-called pui^.^É^^ol' Is ji^ferrcfo since the latter can he carried opt with low-costcomponents and control or regelating units, fo pulse width control with the: aid of a so-called switching control 1er or a Somalie# eonfoofofote puise modula-tion unit in the form of an eiectrottic component is particularly preferred. 'The use of an electronic eoiupottent of the Ihmjly SG3S24 is again particularly preferred here, because the iatter cat! he eontrolied by an analog control signal. The prerequisiie is thus provided for âture sensor directly to the control un it of the clrudating pump.

Such a control can of course also he controlled -fey an analog oafout of a central conifol system of the heat supply system.

In eases In which longer line paths to foe storage eiemeçt occur within the heat supply sysfofos or increased feed pressures through the storage clement are requited, a natltistage pump or a gamp cascade can be tiscd, wherein the control can take place as described above.

The: switch-over unit required inside the pump ammgemem is (sfositated WIÉ.&4& Äse m foe preferred case. In ope switehhsg position, the latter connects the suction side offoapumpto side of the pump to the storage element, in the second switching position» the Suctksh side of foe pump is con-neeted lo the stomp çtement and foc pressure side is COUtfoctCdfoy foe litfo to foe heat pneraier, A so-called ball valve, be actuated with auxiliary energy, is |>artiehhuly preferted for the 4/2 valve.

Instead of a 4/2 valve, use can fee made of two 3/2 valves;. four 2/2 vdives or also arrangements with hali valves, 3« order to protect the heat supply system and foe pump, a backflow praventer is strests of the latter. An ccntmetloa of the pump Is preformd hem.

The pump arraopment ctm be constituted, depending onthe embodiment of the beat supply system, ip;eonslntc-tion units with interconnected line segments or as a pump arrangement in a compact design or as a pump arrangement in a hiock dcslp,

The inveniioo is explamed below in aidof several examples of éínbo<imí«hts«ddítf whip.

In the figures: F % 1 ;-™~ shows a diagrammatic j-aprgsaiSaiion of a heat sappiv sy§tctp with a storage element disposed

In the latter. P% J ™ shows a diagrammatic mpresentmioo of Éé pump annngeiaeht according to the invention using a d/2 valve in a switching position in which a pump is delivering a media tlow in the direction of a heat source.

Pig. 3 shows the diagratnmatio r^rcseatatioif show» in %, 2 with a switching poshion of the direc tional valve |n which the pump is delivering a media fio^:ÂÉ«i|IÔ«çiÂM^tÂa'ç©one<àed. storage elemeim A heat supply system of the design known per so comprises a heat generator Î, a heat consumer 2 and lines 3 connecting the latter for the hot region (flow! and 4 tor the cold region (return flow). A heating eheaiáflös pump & oán also he intepaied into the heat supply system,

Linesegments 6and7areled Som line 4 to a stompselement 8. Also disposed between line segments 0 and ? is apmnp arranpmotd % which charges or d isoharges SÄge element 8 depending on the requirement

Storage element B canbe connected via eonneeting line It) to line 3. so that medium heated by the storage element 8 can be fed directly into the supply circuit,

The pump arrangement aocordihg to thé ínveíiiíoo m ime segments 6 dad 7 comprises a: pmp 11, a 4/2 valve 1¾ a backflow preventer 13and:eonpeeting lines 14,15 and: 16. ÏP %. 2> 4/2 valve 12 is Ιό: a: first s witching posisiom which:: Op idlsO: he relkted to as the IP position. Switching eleinent f? then conveys the medium hem line segment TffMliiMth pump 11, onward via a line IS. hackflov, |deyeotèi: 13 add line J.Ő into line 6. A heat consumer 2 can tlihs he supplied with heated medium by discharging a storage element not rep resented in fig. 2. in the switching position represented in lig. 3. which corresponds hitbe 40? position, 4/3 valve 12 is switched in such ft way thaï charging of a storage element not represented in Sig. 3 is possible. Heated medium is pumped from heat generator 1 into line 7 via. line 6. 4/2 valve 12, pmup 11> line i§, feaekflow preventer 13 und íme 16> The tnedimn disehsiged frotn the sfomge eleinent is pumped via line IM In fho lifeetlon: towards a heafepnshmer 2.

Baekllow preventer 13 is disposed Oh thé pressure side of pump 11 and is c<»hJwted.'.to Ihf

BaeRHows in the line ..circuit are thus prevesnedj regardless of whether the backflow would ocpdr In a ipdlsedike manner or in a sustained ihalt has arisen.

The way in which the pump heat suppiy system or the types of eotmeeiion with which this is aehldve4'%:'tm»dp«^t ifo* the iovenilom This relates in parftcular to the loed-ih points* at which line segments 6 and line 1Ö are: connected. Whether line ÍÖ is present in the system Is equally unimportant for the Invention. PUrtîJS II is prefemhlÿ a power-controlled pmnp. Particularly preferred here is a pump control which operates wifeapdse width control and always provides pump :IJ wife the energy quantities are precisely tbiiotfed; to perforai the task,

The control of putnp 11 can be achieved fey its own contïel modale or by a: centrai control system M the heat; supply systenr, it is also possible to influence the ejtergy flow to ptanp il byopntKhhni ptpeedures,

An analog signal is feat to pump 11, so that a control module or a central control system cars «aaaraie a pulse-jnödnlatcd oscillation feefefeora.

Tht:;ptl&c<-mi»iMät«d-''0SoiUatiö» is generated by an integrated switching controller or a controlled pulse width Ta.didliaW^^lPhi^flrcxtits of group SG/TM nr their derived .model preferably being used with fed modulator.

The control of the irmddle pmfembiy takes place with analog signais in a voltage range between 0 and lÖ AA The switching controller or feodnlafer preferably operates at a frequency of 4 kHz. 4/| yslyë iliislean feereplaced/by other Identically acihrg valve arrangements dt:the cost of certaht diawbacks. 1;husyibf exafe|!er;iy an arráHgemetn whh two 3/2 valves, by an arrangement with four 2/2 valves Of: also: with m.wtmigmmt of a plurality of ball waives, flltisnafely, it is intportant that an Infefehange of the sueti/m side and die pressure side: of pump 11 with respect to line segments 6 and 7 Is brought about,

Paitlaiilariy pfefèffedy however, is a 4/2 valve 12 in the etnfepdinient as a hall valve on account: of the simple design feerspf and the reliable ;mode of operation:, 4/2 valve 12 or the other switching arrangements cart also be- actoafed by control commands and energy supply and do not require any manna! operation.

Backflow prevertter 13 cart be constituted irt various ways. Thus, it can for example he a device which works with ralidat ofa device wltlch is provided with a swivel-mourned non-return flap. A further emhtxiimenf consists in dre fhet tbht the closure body is spring-loaded and backflow preventer O is aeeordihgiy constituted ns a nonreturn valve..

The pump arrangement constituted^ according to the inveotion is capable of euafeitng an effective control β£.:&$ bègtin^Âulf^ÂJniPt^psmiion with aheatiog boiter and in cooperation wife sheaf sink, hr particular, the known/fluctuations itt the energy provision of solar collectors integrated into rite supply systems cats be; compensated for with the aid of the pump arrangement according to the iswthhm ;md its control system In feat, depending on the heat supply or heat removal, tire pump IS switched itho a delivery direction iivsdeh | Why feat; it mhtoves egeess heated medium froar the heating circuit dr feeds exeess feemedmwdinm to the heating teimpf :lfotn buffer storage element fix; effect of the simultaneously operating pulse-width modulated energy supply of the pump is that the latter always operates with few Optimised vehtfee flow ifed overshooting of fee temperatures lit the heating circuit is avoided.

Claims

It is possible to dispose a. temperature sensorcWhieh lelyers as atiáíog raumumtoont sigalj ä Me Me Me Me Me Me Me Me bas the advantage: that it enables in a: sPaiglsfibrsviati manner an. operation of sheep in two4taw: dit «© ttem-a» d fojMXpéödltöiPP coroponertts and the fiow-mechanieaf design can be optimized, in addition to the solution. low cost am bw, valve cootrois with energy oniy when necessary and-: f pump f f f f f f f f f f f receives receives receives receives receives receives receives receives perform perform perform perform perform perform perform perform perform perform perform perform. heat generator 2 heat consumer 3: Sine 4 iinO: 5 heating circulation pump 6 beh segment 7 line segment § storage element 9 pump arrangement 10 connectirtg line 11 pomp 12 4/2 fault 13 backflow preventer 14 iine 15 line 16 line 17 switching element Reviewing furnMéibtïimei Is höy & llcstctctp Claims E Arrangement with a skin insertion (8} and a stacking strap, which is the first conductor wire burner) A stacking device (ii) is connected to a heater (2) and includes a heating circuit. pump ^ ai: :( 5} a Welding fluid can be accessed by a rack (8) with a second wiring harness, and a stacking arrangement (9} can be connected to the food station, which, with the help of the dispensing arrangement, in one and the following circuit: (8) can be used for storage (8). l If required, a medium can be provided from the Mtsrmeter (I) to the storage element p) and, in this case, to the storage tank (9) of a pump (KI), a switching unit and a reflux condenser (53). : And the lovers of this are in the same way with one of them. · The pump (I t) on the suction side in the first position of the changeover unit with the reservoir (3). on the discharge side is connected to the first conductor with a low-temperature medium inserted therein, (8), - the switch is burning | in the second position the pump (II): on the pressure side, the lubricating element (§ | suction side * ion is connected to the first conduit circuit, the low temperature medium is taken from it and transmitted to the storage element (8) by the pump (15). .

J, The Safeguard Arrangement of Claim 1, is a storage element (8) for a plurality of transmitters, mset 'Jetkmmve, as: pump (I) for tel? guided or sZaMlyos.

3, A.% sttmtl pt stprmtl layout for storing p (p1) in a deaerating facility ^ with which the pump (t i) is controlled or spun; it is provided by at least one analog signal.

Arrangement according to any one of Claims 1 to 3, for operating a bucket (8) in the condition of a snow shovel, the pump being a pump. (! (} more cascades or cascading cascades: brick is a further pump.

5. An arrangement according to any of the following: 1. for the operation of a nutritional vehicle (8) in a MeMating facility, <sU & the switching unit is an arrangement that rotates the pump (t i), delivery Ueede! without reversing its direction, it degrades the switching of the wire connections in the second circuit and at least two transport directions of the medium stream · for the storage or discharge of the storage element.

6, Part S. Dissemination layout: for a storage element (8): for operation in a heat transfer facility, «m / 'jeßhmezipi bogy stz switching unit with a 4/3 valve (12} or 4 (2 pin) .

7, a beaver viewer for operating a storage (8) of a set according to claim 1; Îthey 8 {switchingtheir 8 switchgear 2 (with valve 2, two 3/2 pins or four 2/2 sockets and four 2/2 pins).

8. Are you? Claim: Arrangement according to the invention for operating a storage element (8) on a snow dispenser, such as a power supply unit, so that the slabs or pins can be controlled by auxiliary energy, I * The! -8. Claims according to Claims 1 to 4, wherein the heat supply element (s) is / is / is / is / is / s / pump or cascade: visSxat (s) inhibitors (13) are connected in front of or behind them. I6. Scheme according to claim 9; a torch6 «! em (8) a * <- .the îéiestaetiybço, with a« Uemer.í% to & isxiifi> lyás'- | pseudo (13) a flow-controlled anxiety and / or a temtesvezdreii «dentist * with appetite for a flow ^ feel &» * gdter & etes8 etem with var * kiyketeye,