EP0054027A1 - Procede et dispositif de determination de la deperdition de chaleur - Google Patents

Procede et dispositif de determination de la deperdition de chaleur

Info

Publication number
EP0054027A1
EP0054027A1 EP19810900627 EP81900627A EP0054027A1 EP 0054027 A1 EP0054027 A1 EP 0054027A1 EP 19810900627 EP19810900627 EP 19810900627 EP 81900627 A EP81900627 A EP 81900627A EP 0054027 A1 EP0054027 A1 EP 0054027A1
Authority
EP
European Patent Office
Prior art keywords
wall
skin
climate
simulated
temperature
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.)
Withdrawn
Application number
EP19810900627
Other languages
German (de)
English (en)
Inventor
Bruno Yngve Nilsson
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.)
THERMIUS ELEKTRONIK
Original Assignee
THERMIUS ELEKTRONIK
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
Priority claimed from SE8001666A external-priority patent/SE436452B/sv
Application filed by THERMIUS ELEKTRONIK filed Critical THERMIUS ELEKTRONIK
Publication of EP0054027A1 publication Critical patent/EP0054027A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01W—METEOROLOGY
    • G01W1/00—Meteorology
    • G01W1/17—Catathermometers for measuring "cooling value" related either to weather conditions or to comfort of other human environment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K17/00—Measuring quantity of heat

Definitions

  • the present invention relates to a method and apparatus for climate measurements such as for detexinining the human heat loss of as well indoor as outdoor climate for the control of climate in buildings.
  • the heat flow which leaves the human body through the skin is to be formulated as
  • the heat flow is being simulated with an electric current (I), the thermal resistance of the skin withan electric resistance (R), the skin's surface with an electric potential (U s ) and the temperature of the human body with an electric potential (U b ).
  • the electric current which flows through the electric resistance may be formulated as
  • T s indicates the temperature of the wall's surface and T b the temperature of the walls inner surface and z the thermal resistance of the wall then the heat flow Q through the wall will be described according to 1).
  • FIG 1 an example of an apparatus is being illustratedbased upon the invention.
  • the apparatus is supplied with a constant voltage of for example 5 Volts.
  • the transistor (T1) and the linear temperature sensor (D1) are thermally connected to each other and also to a climate sensing body which is affected by the climate one wants to measure.
  • the climate sensing body may in practice be made of a cylinder of metal with the dimensions ⁇ 10x30 um with a durable surface.
  • the current (I) which flows through the transistor (T1) for instance of type BD 529, will cause that the transistor (T1) but also the temperature sensor (D1 ) which in practice can be the silicon diode 1N 914 and the climate sensing body are being heated up to the temperature (T s ).
  • the resistor (R1 ) together with the temperature sensor (D1) will make that one to the temperature
  • the current flowing through (R1) and (D1) is as well as the current through (R 2 ) and (R 3 much less than the current (I) and could be entirely neglected.
  • the operational amplifier (OP1) could for instance be of type 2740.
  • (OP1) has a high amplification for example 100000 times and controls the current (I) through the transistor (T1). With the high amplificati ⁇ n of the operational amplifier (OP1) the voltage difference between the two inputs may be considered to be nil. This allows then the following relation to be formulated
  • the heat flow according to expression 1) can thus simply be measured with an apparatus according to the invention by utilizing one, for instance in a heat flew, Clo-units, or in the equivalent temperature of a stationary air volume calibrated instrument which measures the current (I) and where the thermal resistance is determined by the electrical resistance (R).
  • the skin's thermal resistance is being simulated with an electrical resistance.
  • This method is considerably si ⁇ plier to apply and results in a greater precisian in the simulation than the method of furnishing the climate sensing body with a heat insulating layer. It is difficult to furnish a climate sensing body with a defined layer which has a durable surface which has stable thermal qualities and which has a defined and constant thermal connection to the climate sensing body.
  • the thermal resistance is being simulated with partly a heat insulating layer but also partly owing to the fact that the locp gain of the taiperature regulation system is being reduced so that a certain regulation error will occur.
  • the way of the present invention is even in this case considerably si ⁇ plier to apply and will result in a greater precision in the simulation of the thermal resistance.
  • the influence of-the human perspiration on the heat loss to the envirtnment is simulated allowing water to evaporate from the surface of the climate seising body with a porous surface which is being moistened with water. Depending on the humidity of the surrounding air mass a more or less rapid evaporation of the water will occur. This effect will cause a more or less great heat loss from the climate sensing body.
  • the effect of air movement is regulated by means of a suitably formed shield which to the extent desired limits the cooling of the climate sensing body.
  • the shield can for instance be made of a finemeshed net or a in a suitable way perforated can which encloses the climate sensing body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

Procede et dispositif servant a determiner la deperdition de chaleur par exemple d'un etre humain ou d'un batiment chauffe en fonction du climat environnant. Le principe se base sur un procede analogique de simulation et comprend un corps chauffe de detection du climat. Le flux de chaleur est simule par un courant electrique (1) correspondant. La resistance thermique de la peau respectivement de la paroi est simulee par une resistance electrique (R) correspondante. La temperature du corps et la temperature de la surface de la peau ou la et exterieure de la paroi sont simulees par deux potentiels correspondants (Ub) respectivement (Us) qui apparaissent a chaque cote de la resistance electrique (R). Le courant (1) est mesure par exemple au moyen d'un instrument etalonne dans le flux de chaleur ou dans la temperature effective.
EP19810900627 1980-03-04 1981-03-04 Procede et dispositif de determination de la deperdition de chaleur Withdrawn EP0054027A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8001666A SE436452B (sv) 1980-03-04 1980-03-04 Forfarande och anordning for bestemning av vermeflodet mellan en med ett termoresistivt skikt overdragen kropp och denna kropps omgivning
SE8001666 1980-03-04
SE8007311 1980-10-17
SE8007311 1980-10-17

Publications (1)

Publication Number Publication Date
EP0054027A1 true EP0054027A1 (fr) 1982-06-23

Family

ID=26657495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810900627 Withdrawn EP0054027A1 (fr) 1980-03-04 1981-03-04 Procede et dispositif de determination de la deperdition de chaleur

Country Status (4)

Country Link
EP (1) EP0054027A1 (fr)
JP (1) JPS57500446A (fr)
AU (1) AU6787981A (fr)
WO (1) WO1981002638A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6919729B2 (en) 2003-01-06 2005-07-19 Rohrback Cosasco Systems, Inc. Corrosivity measuring device with temperature compensation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504157A (en) * 1982-09-30 1985-03-12 Austin Crabtree Chill temperature meter
US4964115A (en) * 1987-12-11 1990-10-16 Matsushita Electric Industrial Co., Ltd. Thermal sensing system
IT1250833B (it) * 1991-07-31 1995-04-21 Fiat Auto Spa Dispositivo rilevatore per valutare le condizioni di conforto termico in un ambiente, ad esempio nell'abitacolo di un autoveicolo.
GB2588580B (en) * 2019-10-11 2022-06-22 Windtech As Measuring environmental exposure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1357177A (en) * 1970-11-19 1974-06-19 Madsen T L Apparatuses for measuring the degree of thermal discomfort and systems comprising such apparatuses
DE2210523A1 (de) * 1972-03-02 1973-09-06 Gert Schlueter Elektronischer raumklima-analysator (raumklima-messgeraet)
CA988322A (en) * 1973-03-30 1976-05-04 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government Method and apparatus for determining wet bulb globe temperature
DE2528340C2 (de) * 1975-06-25 1976-12-30 Madsen Thomas Lund Geraet zum messen des durch asymmetrie des thermischen feldes verursachten thermischen unbehagens
CA1035596A (fr) * 1975-09-23 1978-08-01 Lloyd E. Machattie Thermometrie de l'air stagnant a l'ombre

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8102638A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6919729B2 (en) 2003-01-06 2005-07-19 Rohrback Cosasco Systems, Inc. Corrosivity measuring device with temperature compensation

Also Published As

Publication number Publication date
AU6787981A (en) 1981-09-23
WO1981002638A1 (fr) 1981-09-17
JPS57500446A (fr) 1982-03-11

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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

Designated state(s): AT CH DE FR GB NL

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19820913

RIN1 Information on inventor provided before grant (corrected)

Inventor name: NILSSON, BRUNO YNGVE