WO2001001045A1 - Procede permettant de regler le debit massique dans un circuit liquide transferant de l'energie - Google Patents

Procede permettant de regler le debit massique dans un circuit liquide transferant de l'energie Download PDF

Info

Publication number
WO2001001045A1
WO2001001045A1 PCT/FI2000/000565 FI0000565W WO0101045A1 WO 2001001045 A1 WO2001001045 A1 WO 2001001045A1 FI 0000565 W FI0000565 W FI 0000565W WO 0101045 A1 WO0101045 A1 WO 0101045A1
Authority
WO
WIPO (PCT)
Prior art keywords
energy
liquid circuit
flow
medium
emitting
Prior art date
Application number
PCT/FI2000/000565
Other languages
English (en)
Inventor
Christer Ekman
Juhani Yli-Olli
Original Assignee
ABB Fläkt Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ABB Fläkt Oy filed Critical ABB Fläkt Oy
Priority to AU55377/00A priority Critical patent/AU5537700A/en
Publication of WO2001001045A1 publication Critical patent/WO2001001045A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
    • G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
    • G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56—Heat recovery units

Definitions

  • the invention relates to a method of adjusting mass flow in a liquid circuit transferring energy, the liquid circuit being part of an arrangement wherein one or more devices emitting energy and/or one or more devices receiving energy are connected to the liquid circuit filled with liquid, through which liquid circuit energy is transmitted in a closed circuit, and the mass flow or energy content of a medium emitting and/or a medium receiving energy varies during the energy transfer process.
  • Energy consumption of today not only emphasizes energy recovery but also efficient utilization of energy. In practice this means that devices and systems should utilize the energy used as efficiently as possible within an extensive operation area in varying load situations.
  • steps of recovering, receiving and produc- ing energy are transferred from steps of recovering, receiving and produc- ing energy to a step of emitting energy through one or more liquid circuits by using a suitable liquid or solution as a medium.
  • the steps of receiving, recovering and/or emitting energy thus comprise a process in which the medium with its pipes serves as one element for transferring energy from one step to another.
  • This element is henceforth called a liquid circuit.
  • the other element is a medium receiving or emitting energy, either flowing air or a gaseous mixture, or, alternatively, a liquid, which will henceforth be called a medium emitting or a medium receiving energy.
  • the received or emitted amount of energy compared with the amount of energy to be received or to be emitted describes the efficiency of the apparatus, in other words the efficiency of the process.
  • a desirable characteristic is as high efficiency as possible, which means that as much as possible of the energy used can be utilized.
  • the relationship between mass flows and the relationship between the mass flows and the size of the plant must be optimal. If the media emitting or receiving energy are constant in mass flow or energy amount, in order to achieve good efficiency it will usually suffice to adjust the liquid circuit once, and the relationship between the mass flows in the liquid circuit and between the media emitting or receiving energy remains optimal, which is required by the dimensioning of the devices.
  • the need for adjustment of the energy transfer process changes according to the situation.
  • Potential restrictive functions which, for example, protect the system against freezing, may make the situation more difficult.
  • a common practice currently is that the flow in the liquid circuit is generated by one or more pumps having a constant speed of rotation.
  • the protective measures and potential adjustment have been implemented by arranging a by-pass or limiting at the device either emitting or receiving energy to partly or completely reduce the effect of the device.
  • flow control which may be an adjustable pump, valve or another device. If the mass flows or energy contents of the media emitting or receiving energy vary, the maximum efficiency has to be determined according to a situation or flow area, which is taken into account in the dimensioning of the devices. If the adjustment process is uncontrolled, the flow in the liquid circuit may end up in an area wherein heat transfer is substantially impaired when, for example, the flow changes into a laminar one in the energy transfer devices. Usually, this means great financial losses since the energy level required changes if the desired amounts of energy are to be transferred through the same apparatus.
  • An object of the invention is to provide a solution to enable drawbacks of the prior art to be eliminated.
  • a method of the in- vention which is characterized in that the flow of the liquid circuit is adjusted stepwise such that first, in a step of optimizing the energy process, the mass flow of the liquid circuit is controlled according to a varying reference value or default value of the computational formula of the desired energy efficiency with respect to the current mass flow or energy flow of the medium emitting and/or receiving energy, after which, in a second step, after predetermined conditions have been fulfilled, the flow in the iiquid circuit is adjusted on the basis of at least one reference measurement responding to the efficiency after a change has been intentionally effected in the flow such that the change in the variable describing the effect is compared with the previous step, and after it has been compared whether the new situation is better, the next step will continue simi-Char, opposite or unchanged.
  • a main advantage of the invention is that the invention enables technical problems relating to adjustment of the liquid circuit to be removed in a cost-efficient and reliable manner and optimal efficiency to be achieved during a varying process.
  • a further advantage of the invention is versatility be- cause the invention can be applied in connection with various energy transfer processes.
  • Figure 2 is a simplified, diagrammatic view of a second energy transfer circuit utilizing the method of the invention.
  • Figure 3 is a simplified, diagrammatic view of a third example of an energy transfer circuit utilizing the method of the invention.
  • Figure 1 is a schematic, diagrammatic view of a simple energy transfer circuit.
  • the recovery circuit comprises one device 1 emitting energy and one device 2 receiving energy, a liquid circuit 3 being arranged therebetween.
  • a medium 4 emitting energy is designated by reference number 4, and a medium receiving energy by reference number 5.
  • the medium 4 emitting energy may be, for example, indoor air flowing outdoors, also called exhaust air, and the medium receiving energy may, correspondingly, be outdoor air flowing indoors, also called incoming air, etc.
  • Figure 1 shows a device adjusting the mass flow of the liquid circuit, a pump 6 or a valve 7, and further, a device designated by reference number 8 for carrying out a registration function of the mass flow or energy flow, an adjuster designated by reference number 9, and a device designated by reference number 10 for carrying out a reference measurement.
  • the basic idea in a solution according to Figure 1 is that the device
  • the basic idea of the method of the invention is generally that the solution aims to remove technical problems relating to adjustment of the liquid circuit in a cost-efficient and reliable manner and to achieve optimal efficiency during a varying process.
  • the method of the invention is substantially based on a procedure wherein the steps of receiving and/or emitting energy are adjusted by using adjustment arrangements separately known per se stepwise, separately, sequentially or simultaneously, depending on the adjustment step required by the energy transfer process.
  • the method of the invention relates to adjusting the flow in the liquid circuit 3 at the device 1 emitting energy or the device 2 receiving energy by affecting the other device through, for example, the speed of rotation of the pump 6 or the operation of the valve 7 in a manner agreeing with the energy needed, good energy efficiency and the rest of the functions of the system.
  • the flow of the liquid circuit 3 is adjusted stepwise such that first, the mass flow of the liquid circuit 3 is controlled in an optimizing step of the energy process according to a varying reference value or presumption of the computational formula of the desired energy efficiency with respect to the current mass flow or energy flow of the medium emitting and/or receiving energy.
  • the flow in the liquid circuit 3 is adjusted on the basis of at least one reference measurement 10 responding to the efficiency after a change has been intentionally effected in the flow such that the change in the variable describing the effect is compared with the previous step, and after it has been compared whether the new situation is better, the next step will continue similar, opposite or unchanged.
  • the reference measurement 10 may be carried out, for example, directly from the medium emitting energy, as in the example of Figure 1. This, however, is not the only alternative but corresponding information can also be obtained in a different manner. Such an example is shown in Figure 2. In its essential parts, the example in Figure 2 is similar to the example in Figure 1.
  • the basic principles described above can be applied in accordance with the underlying idea of the invention in the manner shown in the figures.
  • the basic idea of the invention can, however, be also applied such that the flow of the liquid circuit 3 is adjusted in the second step on the basis of one or more measurements 10, 11 by introducing the measurement results into a computational formula, which determines the adjustment effect of the second adjustment step.
  • the basic idea of the invention and the application mentioned above may also be applied such that the steps are variably emphasized as necessary.
  • the adjustment may, for example, be implemented by adjusting the flow of the liquid circuit 3 dynamically such that the degree of the adjustment effect changes during the adjustment process such that at first, the mass flow of the liquid circuit 3 is controlled, by using weighted adjusting, according to the computational formula of the desired energy efficiency of the energy process with respect to the current mass flow or energy flow of the medium emitting and/or receiving energy, and in the end, the flow of the iiquid circuit is controlled by weighted adjusting on the basis of, for example, one reference measurement 10 responding to the efficiency or on the basis of the computational result of several measurements 11 describing the efficiency.
  • the ad- justment may utilize a function wherein a set value of a detecting element of the measuring device 10 in the medium 4 emitting energy or in the medium 5 receiving energy is determined from the temperature of the liquid circuit 3, and wherein the energy flow through the device 1 emitting energy and/or the device 2 receiving energy is adjusted such that said temperature is maintained.
  • Figure 3 shows a third application of the method of the invention.
  • FIG. 3 Similar reference numerals used in Figure 3 indicate similar parts in Figures 1 and 2.
  • the application of Figure 3 comprises only one device 1 emitting energy and a liquid circuit 3.
  • the adjustment of the application according to Figure 3 is carried out in a similar manner to that described above in connection with the applications of Figures 1 and 2.
  • the example of Figure 3 can also be applied according to the basic idea of the invention such that in place of the device 1 emitting energy there is provided the device 2 receiving energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Flow Control (AREA)

Abstract

L'invention concerne un procédé de réglage du débit massique dans un circuit liquide transférant de l'énergie. Ce circuit liquide fait partie d'un ensemble comportant un ou plusieurs dispositifs (1) émetteurs d'énergie et/ou un ou plusieurs dispositifs (2) récepteurs d'énergie reliés au circuit liquide (3) rempli de liquide. Une énergie est transmise en circuit fermé par ce circuit liquide et le débit massique ou le contenu énergétique d'un milieu (4) émetteur d'énergie et/ou d'un milieu (5) récepteur d'énergie varie pendant le déroulement du procédé de transfert d'énergie. Pour obtenir une efficacité optimale, le débit du circuit liquide (3) est réglé de manière progressive de sorte que, dans une première étape consistant à optimiser le procédé de transfert d'énergie, le débit massique du circuit liquide (3) est régulé selon une valeur de référence variable ou une valeur par défaut de la formule computationnelle de l'efficacité énergétique voulue par rapport au débit massique courant ou au débit énergétique du milieu (4) émetteur d'énergie et/ou d'un milieu (5) récepteur d'énergie. Dans une seconde étape, après que les conditions prédéterminées ont été remplies, le débit du circuit liquide (3) est réglé sur la base d'au moins une mesure de référence (10) répondant à l'efficacité après une modification intentionnelle du débit de sorte que le changement de la variable décrivant l'effet est comparé à la première étape. Après avoir évalué la nouvelle situation pour savoir si elle est préférable, l'étape suivante continue de manière similaire, de manière opposée ou sans qu'aucun changement n'intervienne.
PCT/FI2000/000565 1999-06-24 2000-06-22 Procede permettant de regler le debit massique dans un circuit liquide transferant de l'energie WO2001001045A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU55377/00A AU5537700A (en) 1999-06-24 2000-06-22 Method of adjusting mass flow in liquid circuit transferring energy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI991444 1999-06-24
FI991444A FI991444A (fi) 1999-06-24 1999-06-24 Menetelmä energiaa siirtävän nestepiirin massavirran säätämiseksi

Publications (1)

Publication Number Publication Date
WO2001001045A1 true WO2001001045A1 (fr) 2001-01-04

Family

ID=8554949

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2000/000565 WO2001001045A1 (fr) 1999-06-24 2000-06-22 Procede permettant de regler le debit massique dans un circuit liquide transferant de l'energie

Country Status (3)

Country Link
AU (1) AU5537700A (fr)
FI (1) FI991444A (fr)
WO (1) WO2001001045A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994548A (zh) * 2014-05-23 2014-08-20 南京师范大学 通过干湿球温度允差等级划分来调节空调制冷量的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442055B (sv) * 1979-11-16 1985-11-25 Bahco Ventilation Ab Sett och anordning for att faststella temperaturverkningsgraden hos en vermevexlare, eller aterluftsgraden i ett luftbehandlingsaggregat
EP0222963A1 (fr) * 1985-11-20 1987-05-27 Jäggi AG Bern Procédé et installation pour la récupération de la chaleur
US5806582A (en) * 1993-07-07 1998-09-15 Abb Installaatiot Oy Method and arrangement for controlling heat transfer in ventilation Apparatus or air conditioning apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442055B (sv) * 1979-11-16 1985-11-25 Bahco Ventilation Ab Sett och anordning for att faststella temperaturverkningsgraden hos en vermevexlare, eller aterluftsgraden i ett luftbehandlingsaggregat
EP0222963A1 (fr) * 1985-11-20 1987-05-27 Jäggi AG Bern Procédé et installation pour la récupération de la chaleur
US5806582A (en) * 1993-07-07 1998-09-15 Abb Installaatiot Oy Method and arrangement for controlling heat transfer in ventilation Apparatus or air conditioning apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994548A (zh) * 2014-05-23 2014-08-20 南京师范大学 通过干湿球温度允差等级划分来调节空调制冷量的方法

Also Published As

Publication number Publication date
FI991444A0 (fi) 1999-06-24
FI991444A (fi) 2000-12-25
AU5537700A (en) 2001-01-31

Similar Documents

Publication Publication Date Title
WO1986003281A1 (fr) Procede et dispositif destine principalement au controle du rendement des pompes a chaleur ou des installations frigorifiques
KR960001666A (ko) 가변성 팬속도 제어 수단을 구비한 개선된 강제식 공기열교환 시스템
WO2001001045A1 (fr) Procede permettant de regler le debit massique dans un circuit liquide transferant de l'energie
KR850000595A (ko) 냉각설비 작동 방법 및 장치
CN1133052C (zh) 吸收式冷冻机
US5355846A (en) Cooling device for use in engine
US4248292A (en) Heat transfer control circuit for a heat pump
JPS6016283A (ja) 冷凍装置における変流量制御装置
JPH0735940B2 (ja) 冷却装置
KR100340474B1 (ko) 이중효과흡수냉동기
US5355692A (en) Phase change location controller for a heat exchanger in a refrigeration system
SE463533B (sv) Anording foer temperaturbaserad koeldmediestyrning vid en vaermepump
JP2003207190A (ja) 空調システム
US5782099A (en) Method for controlling an absorption system
US5213066A (en) Evaporation cooled internal combustion engine
JPH0473062B2 (fr)
JPS5872859A (ja) 冷凍装置
EP0249467A1 (fr) Système de refroidissement par évaporation
JP3112596B2 (ja) 吸収冷凍機及びその制御方法
JP3280085B2 (ja) 吸収冷凍機における運転制御方法
JPH0435680B2 (fr)
Miyazaki et al. DEVELOPMENT OF A TWO-PHASE GOLD PLATE
JPH07190570A (ja) 熱交換装置
SU1555604A1 (ru) Устройство дл утилизации тепловой энергии выт жного воздуха помещени
KR950008017Y1 (ko) 왕복동식 냉동기의 응축기 수냉장치

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ CZ DE DE DK DK DM DZ EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP