EP0615070B1 - Anlage mit Pumpeneinheit zum Umwälzen einer Beheizten Flüssigkeit - Google Patents

Anlage mit Pumpeneinheit zum Umwälzen einer Beheizten Flüssigkeit Download PDF

Info

Publication number
EP0615070B1
EP0615070B1 EP94103335A EP94103335A EP0615070B1 EP 0615070 B1 EP0615070 B1 EP 0615070B1 EP 94103335 A EP94103335 A EP 94103335A EP 94103335 A EP94103335 A EP 94103335A EP 0615070 B1 EP0615070 B1 EP 0615070B1
Authority
EP
European Patent Office
Prior art keywords
plant
liquid
pump unit
pump
electric motor
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP94103335A
Other languages
English (en)
French (fr)
Other versions
EP0615070A1 (de
Inventor
Leif Rasmussen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
T Smedegaard AS
Original Assignee
T Smedegaard AS
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 T Smedegaard AS filed Critical T Smedegaard AS
Publication of EP0615070A1 publication Critical patent/EP0615070A1/de
Application granted granted Critical
Publication of EP0615070B1 publication Critical patent/EP0615070B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction

Definitions

  • the present invention relates to a plant with a pump unit for circulating heated liquid within the plant, said pump unit comprising a liquid pump and an electric motor driving the liquid pump.
  • circulating pumps of the so-called wet-rotor type are conventionally used, said pumps being cooled in part by the circulating liquid in the region between the rotor and the stator, in part by the ambient air in the region around the motor housing.
  • a motor with a dry-running rotor is used, the motor being air-cooled, this cooling conventionally being augmented by a blower rotor mounted on the motor shaft.
  • Both these types of circulating pumps dissipate a substantial amount of heat to the surroundings, thus constituting a source of undesired heating of the space, in which they are situated.
  • the dissipated heat comes in part from the motor losses, in part from the heated liquid being circulated.
  • EP-A-0 467 282 describes a pump unit, which is cooled by circulating a part-flow of the pumped liquid in a cooling jacket.
  • the pumped liquid is mentioned as being waste water or sludge. Accordingly there is no intentional heating of this liquid and the temperature can be expected to be in the range 5-15°C.
  • This document does not mention anything about recovery of heat or preservation of energy. The only object of this document is to cool the motor and to remove air from the cooling jacket.
  • US-A-4 854 373 discloses a pump unit for circulating heated liquid.
  • the motor is partially cooled by circulating a part-flow of the circulated liquid in a separate externally mounted cooling jacket covering approximately one half of the surface of the motor. Since the flow of the liquid in the cooling jacket can be controlled, the motor has to be cooled in an alternative way, when this control reduces the cooling via the cooling jacket. This part of the cooling represents loss of energy to the surroundings.
  • DE-A-31 09 624 describes thermally insulation of a pump unit with the purpose of transporting the heated water with minimum heat loss. This document does not mention anything about recovery of the losses in the motor, to achieve a substantial energy saving.
  • the pump unit is a so-called wet-rotor type whereas the present invention relates to a pump unit with a dry running rotor.
  • a further improvement of the operating economy is achieved by insulating the complete pump unit, this having been made possible by the fact that it no longer depends on air cooling to keep the temperature at a suitably low level.
  • this insulation is provided by means of a set of insulating shells, preferably made of polyurethane foam, mounted around the pump unit, making it possible to perform maintenance and inspection work on the pump unit by simply removing the insulating shells.
  • the pump unit shown on the drawing comprises a pump housing 1 with an inlet connection 2 and an outlet connection 3 for the heated liquid being circulated. Inside the pump housing 1, a pump impeller 5 is mounted on a motor shaft 4.
  • the motor driving the pump is a conventional electric motor, e.g. a three-phase asynchronous motor, with a stator 6 and a rotor 7 on the motor shaft 4.
  • the motor is provided with a cooling jacket 8 embracing the stator 6. Cooling ducts 9 for the circulation of cooling liquid are provided in the cooling jacket 8, said cooling liquid being taken from the pressure side of the pump and returned to its suction side.
  • the pump unit is insulated from the surroundings by means of a set of insulating shells 10, surrounding or embracing the pump unit completely with the exception of openings for the inlet and outlet connections 2,3, for electrical connections to the stator windings and for access with a view to expelling air from the cooling ducts.
  • a saving in operating costs is achieved, if a pump unit as described above is made to replace the traditional circulation pump, in which the motor is cooled by air, this cooling being augmented by means of a blower rotor mounted on the motor shaft.
  • This is in part due to the higher efficiency of the electric motor, not having to drive a blower rotor mounted on its shaft, in part that the heat losses of the motor are transferred to the circulating liquid, thus effecting a corresponding saving in oil or natural gas for heating the liquid.
  • a further reduction of the heat losses to the surroundings is achieved by the fact that the pump unit as a whole is insulated from the surroundings.
  • a pump unit comprising an un-insulated liquid pump and a blower-cooled electric motor, exhibits the following operating costs, the price of electricity being set to 1 kr./kWh and oil or natural gas, account taken for boiler efficiency, is set to a price of 0.50 kr./kWh (all amounts in Danish kr.).
  • Efficiency of blower-cooled motor: ⁇ 0.82.
  • Consumption: 3 kW/0.82 3.65 kW.
  • T 100° C
  • Surface area of the pump housing 0,20 m 2
  • Heat loss from pump housing: 0.023 x 80 x 0.20 0.372 kW
  • Fuel consumption per hour: 0.372 x 0.50 0,19 kr.
  • Total operating cost per hour: 3.33 + 0.35 - 0.16 3.52 kr.
  • the pump unit is insulated as shown by means of a set of insulating shells of polyurethane foam.
  • the thickness of the insulating material is 60 mm and the surface area of the insulating jacket is 0.78 m 2 .
  • the price of the pump is of the order of magnitude 6000 kr., at least the increase in cost for the special embodiment will have paid for itself in the course of one year.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Central Heating Systems (AREA)
  • Cookers (AREA)

Claims (3)

  1. Anlage mit einer Pumpeneinheit zum Umwälzen einer erwärmten Flüssigkeit in der Anlage, wobei die Pumpeneinheit eine Flüssigkeitspumpe (1, 2, 3, 5) und einen die Flüssigkeitspumpe antreibenden Elektromotor (4, 6, 7) aufweist, dadurch gekennzeichnet, daß der Elektromotor ausschließlich durch Umwälzen einer Teilströmung der erwärmten Flüssigkeit gekühlt wird, die durch die Flüssigkeitspumpe in einem in dem Elektromotor vorgesehenen Kühlmantel (8) umgewälzt wird, und daß der Elektromotor (4, 6, 7) und die Flüssigkeitspumpe (1, 2, 3, 5) von der Umgebung wärmeisoliert (10) sind.
  2. Anlage nach Anspruch 1, dadurch gekennzeichnet, daß die Wärmeisolierung (10) des Elektromotors (4, 6, 7) und der Flüssigkeitspumpe (1, 2, 3, 5) durch einen Satz von Isolierhüllen (10) gebildet ist, die um die Pumpeneinheit angeordnet sind.
  3. Anlage nach Anspruch 2, dadurch gekennzeichnet, daß die Isolierhüllen (10) aus Polyurethanschaum hergestellt sind.
EP94103335A 1993-03-10 1994-03-04 Anlage mit Pumpeneinheit zum Umwälzen einer Beheizten Flüssigkeit Expired - Lifetime EP0615070B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK027393A DK169001B1 (da) 1993-03-10 1993-03-10 Anlæg omfattende en pumpeenhed til cirkulation af opvarmet væske i anlægget
DK273/93 1993-03-10

Publications (2)

Publication Number Publication Date
EP0615070A1 EP0615070A1 (de) 1994-09-14
EP0615070B1 true EP0615070B1 (de) 1997-05-14

Family

ID=8091691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94103335A Expired - Lifetime EP0615070B1 (de) 1993-03-10 1994-03-04 Anlage mit Pumpeneinheit zum Umwälzen einer Beheizten Flüssigkeit

Country Status (4)

Country Link
EP (1) EP0615070B1 (de)
AT (1) ATE153108T1 (de)
DE (1) DE69403121T2 (de)
DK (1) DK169001B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19633137A1 (de) * 1996-08-16 1998-02-19 Wolff Horst Dipl Ing Fh Umwälzpumpe zur Förderung von Flüssigkeiten
CN102753258B (zh) * 2009-09-15 2015-04-15 芙罗服务管理公司 具有绝热壳体的可竖直旋转的轴杆组件
DE102014208297B4 (de) * 2014-05-02 2019-10-31 Homa Pumpenfabrik Gmbh Pumpenanordnung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3109624C2 (de) * 1981-03-13 1986-01-30 Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund Umwälzpumpe
US4854373A (en) * 1988-03-30 1989-08-08 Williams Gordon G Heat exchanger for a pump motor
DE4022610A1 (de) * 1990-07-16 1992-01-23 Abs Pumpen Ag Vorrichtung zur selbsttaetigen entlueftung einer kuehlkammer
DE4118057A1 (de) * 1991-06-01 1992-12-03 Oplaender Wilo Werk Gmbh Verpackung einer pumpe

Also Published As

Publication number Publication date
DK169001B1 (da) 1994-07-25
DE69403121D1 (de) 1997-06-19
DK27393A (da) 1994-07-25
ATE153108T1 (de) 1997-05-15
EP0615070A1 (de) 1994-09-14
DK27393D0 (da) 1993-03-10
DE69403121T2 (de) 1997-09-18

Similar Documents

Publication Publication Date Title
EP1381143A1 (de) Turbogenerator mit zusätzlicher paralleler Kühlung und entsprechende Methoden
US7066114B1 (en) Reverse fan operation for vehicle cooling system
US6951192B2 (en) Method and apparatus for regulating the operating temperature of an internal combustion engine
EP0592500B1 (de) Kombiniertes wärme- und kraftsystem
US6121698A (en) Oil cooled motor and pump apparatus
CA2474415A1 (en) Auxillary cooler for an engine located in a building
EP0615070A1 (de) Anlage mit Pumpeneinheit zum Umwälzen einer Heissen Flüssigkeit
JP3425351B2 (ja) ２段遠心圧縮機
EP0393194B1 (de) Laseroszillator
US4157013A (en) Water cooled automotive gas turbine engine
CN221664917U (zh) 具有强制散热功能的螺杆式空气压缩机
EP0003723A2 (de) Verfahren und Vorrichtung zum Heizen mittels Wärmepumpe
EP0607999A3 (en) Method of cooling the shaft of a gear pump rotor.
KR100316609B1 (ko) 펌프용 모터의 냉각장치
JPH09199648A (ja) 水冷式インバータ装置の凍結防止方法
GB2204095A (en) Gas pump module
CA2124573C (en) Method for utilization of heat energy in a district heating network from a generating plant with an air-cooled generator powered by an internal combustion engine, and a generatingplant performing the method
US7377113B2 (en) Modular turbine generator and method of operation
CN218449788U (zh) 一种炉水泵电机循环水冷装置
US20250237234A1 (en) Pool pump with cooling apparatus
KR200438409Y1 (ko) 유체 커플링을 구비하는 발전용 보일러
CN219999181U (zh) 一种电动机内循环散热降温系统
CN223843632U (zh) 一种高防护的螺杆压缩机
JP3092863B2 (ja) 水中ポンプ装置
KR20250149167A (ko) 풍력 터빈의 나셀 내의 냉각 시스템을 동작시키기 위한 방법 및 풍력 터빈

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

RAX Requested extension states of the european patent have changed

Free format text: SI PAYMENT 940304

17P Request for examination filed

Effective date: 19940817

17Q First examination report despatched

Effective date: 19951025

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: SI PAYMENT 940304

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970514

Ref country code: LI

Effective date: 19970514

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19970514

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970514

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19970514

Ref country code: DK

Effective date: 19970514

Ref country code: CH

Effective date: 19970514

Ref country code: BE

Effective date: 19970514

Ref country code: AT

Effective date: 19970514

REF Corresponds to:

Ref document number: 153108

Country of ref document: AT

Date of ref document: 19970515

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69403121

Country of ref document: DE

Date of ref document: 19970619

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970814

Ref country code: PT

Effective date: 19970814

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980304

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980304

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980304

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980304

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990216

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990528

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010103