EP0054027A1 - Method and apparatus for determining heat loss - Google Patents
Method and apparatus for determining heat lossInfo
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004088 simulation Methods 0.000 claims abstract description 6
- 230000036760 body temperature Effects 0.000 claims abstract 3
- 230000001105 regulatory effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 241000282412 Homo Species 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims 1
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 241000143957 Vanessa atalanta Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8001666 | 1980-03-04 | ||
| 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 |
| SE8007311 | 1980-10-17 | ||
| SE8007311 | 1980-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0054027A1 true EP0054027A1 (en) | 1982-06-23 |
Family
ID=26657495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19810900627 Withdrawn EP0054027A1 (en) | 1980-03-04 | 1981-03-04 | Method and apparatus for determining heat loss |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0054027A1 (OSRAM) |
| JP (1) | JPS57500446A (OSRAM) |
| AU (1) | AU6787981A (OSRAM) |
| WO (1) | WO1981002638A1 (OSRAM) |
Cited By (1)
| 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)
| 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)
| 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 (en) * | 1975-09-23 | 1978-08-01 | Lloyd E. Machattie | Still shade temperature measurement |
-
1981
- 1981-03-04 WO PCT/SE1981/000062 patent/WO1981002638A1/en not_active Ceased
- 1981-03-04 JP JP56500884A patent/JPS57500446A/ja active Pending
- 1981-03-04 EP EP19810900627 patent/EP0054027A1/en not_active Withdrawn
- 1981-03-04 AU AU67879/81A patent/AU6787981A/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8102638A1 * |
Cited By (1)
| 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 |
|---|---|
| WO1981002638A1 (en) | 1981-09-17 |
| JPS57500446A (OSRAM) | 1982-03-11 |
| AU6787981A (en) | 1981-09-23 |
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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 |