CS242498B1 - Device for measuring thermal conductivity using standards - Google Patents
Device for measuring thermal conductivity using standards Download PDFInfo
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- CS242498B1 CS242498B1 CS844084A CS408484A CS242498B1 CS 242498 B1 CS242498 B1 CS 242498B1 CS 844084 A CS844084 A CS 844084A CS 408484 A CS408484 A CS 408484A CS 242498 B1 CS242498 B1 CS 242498B1
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Abstract
Riešenie sa týká zariadenia na meranie tepelnej vodivosti pomocou etalónov. Podstatou zariadenia sú v jednej osi usporiadané vyhrievacie teleso (lj opatřené na odíahlej straně vyhrievacím prvkom (2) a na pritahlej termočlánkom (3) a chladiace teleso (4) opatřené na pritahlej straně termočlánkom (5) a na odíahlej chladičom (6), medzi ktorými je uložený etalon alebo skúšaná vzorka (7). Vyhrievacie teleso (lj a chladiace teleso (4J, ako i etalon alebo skúšaná vzorka (7) sú uložené v segmentoch (8) izolácie, ktoré pri meraní vzájomne priliehajú prítlakom výklopného pruženia (9), uchyteného na stěnách skřínky (10) merania. Zariadenie može byť využité pri výskume, výrobě a skúšaní stavebných a izolačných materiálov, ako i všade tam, kde sa zaisťuje tepelná vodivost látok. Zariadenie je určené na meranie tepelnej vodivosti látok metodou, pri ktorej sa časť tepla prúdiaca mimo skúšanej vzorky meria pomocou etalónov o známom súčiniteli tepelnej vodivosti a tepelný tok skúšanou vzorkou sa vyráta ako rozdiel medzi vyvinutým teplom a teplom prúdiacim mimo skúšanej vzorky.The solution concerns a device for measuring thermal conductivity using standards. The essence of the device is a heating element (lj) arranged in one axis, equipped on the far side with a heating element (2) and on the near side with a thermocouple (3) and a cooling element (4) equipped on the near side with a thermocouple (5) and on the far side with a cooler (6), between which a standard or a test sample (7) is placed. The heating element (lj) and the cooling element (4J, as well as the standard or test sample (7) are placed in segments (8) of insulation, which during measurement are mutually adjacent by the pressure of the tilting spring (9), attached to the walls of the measuring box (10). The device can be used in research, production and testing of building and insulation materials, as well as wherever the thermal conductivity of substances is ensured. The device is intended for measuring the thermal conductivity of substances by a method in which the part of the heat flowing outside the test sample is measured using standards of known The thermal conductivity coefficient and the heat flux through the test sample are calculated as the difference between the heat developed and the heat flowing out of the test sample.
Description
Riešenie sa týká zariadenia na meranie tepelnej vodivosti pomocou etalónov.
Podstatou zariadenia sú v jednej osi usporiadané vyhrievacie teleso (lj opatřené na odlahlej straně vyhrievacím prvkom (2) a na prilahlej termočlánkom (3) a chladiace teleso (4) opatřené na prilahlej straně termočlánkom (5) a na odlahlej chladičom (6), medzi ktorými je uložený etalon alebo skúšaná vzorka (7). Vyhrievacie teleso (lj a chladiace teleso (4j, ako i etalon alebo skúšaná vzorka (7) sú uložené v segmentech (8) izolácie, ktoré pri meraní vzájomne priliehajú prítlakom výklopného pruženia (9), uchyteného na stěnách skřínky (10) merania.
Zariadenie móže byť využité pri výskume, výrobě a skúšaní stavebných a izolačných materiálov, ako i všade tam, kde sa zaisťuje tepelná vodivost látok.
Zariadenie je určené na meranie tepelnej vodivosti látok metodou, pri ktorej sa část tepla prúdiaca mimo skúšanej vzorky meria pomocou etalónov o známom súčiniteli tepelnej vodivosti a tepelný tok skúšanou vzorkou sa vyráta ako rozdiel medzi vyvinutým teplom a teplom prúdiacim mimo skúšanej vzorky.
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Vynález sa týká zariadenia na stanovenie tepelnej vodivosti látok, u ktorého sa část tepla prúdiaca mimo skúšanej vzorky zisťuje pomocou merania etalónov o známom súčiniteli tepelnej vodivosti a teplo prúdiace skúšanou vzorkou sa vyráta ako rozdiel medzi vyvinutým teplom a teplom prúdiacim mimo skúšanej vzorky.
Doposia! známe zariadenia na meranie tepelnej vodivosti sú riešené na využitie metod, pri ktorých sa buď vytvárajú také podmienky, aby vyvinuté teplo přetékalo kvantitativné skúšanou látkou, alebo sa tepelný tok skúšanou látkou zistí výpočtom. V oboch prípadoch alebo ich kombináciách sú zariadenia technicky náročné a proces přípravy merania a meranie zdíhavé.
Podstatou zariadenia na meranie tepelnej vodivosti pomocou etalónov je to, že v ose meraného tepelného toku sú za sebou usporiadané vyhrievacie teleso opatřené na odl'ahlej straně vyhrievacím prvkom a na prilahlej termočlánkom a chladiace teleso opatrené na prilahlej straně termočlánkom a na odlahlej chladičom, medzi ktorými je uložený etalon alebo skúšaná vzorka, pričom tvar a rozměry stien kolmých na os usporiadania oboch telies, ako i etalonu a skúšanej vzorky sú zhodné a bočné steny sú rovnoběžné s osou usporiadania.
Aby sa dosiahli opakovatelné podmienky merania, vyhrievacie teleso, etalon alebo skúšaná vzorka a chladiace teleso až po chladič sú uložené v segmentoch izolácie, ktoré vzájomne priliehajú prítlakom výklopného pruženia uchyteného na stěnách skřínky merania. Výhodou zariadenia je konštrukčná jednoduchost a nenáročnost, urýchlenie procesu přípravy a priebehu merania, možnost’ automatického záznamu meraných teplot a možnost automatizácie procesu merania.
Na výkrese je schematicky znázorněný vertikálny rez zariadením a jeho napojenie na zdroj elektrického prúdu a zapisovač teplot. V zariadení podlá výkresu je kovové vyhrievacie teleso 1 v tvare pravidelného štvorbokého hranola opatřené odporovým vyhrievacím prvkom 2 a termočlánkom 3 a kovové chladiace teleso 4 rovnakého tvaru opatřené termočlánkom 5 a chladičom 6.
Etalón alebo skúšaná vzorka 7 je uložený medzi kovovým vyhrievacím telesom 1 a chladiacim telesom 4, s ktorými sa zhoduje v tvare a rozmeroch stien kolmých na os usporiadania. Pre zabezpečenie opakovatelných podmienok merania je kovové vyhrievacie teleso 1, etalón alebo skúšaná vzorka 7 a chladiace teleso 4 až po chladič 6 uložené v segmentoch 8 izolácie z napěněného polystyrénu.
Steny jednotlivých častí zariadenia a izoláeie vzájomne priliehajú prítlakom výklopného pruženia 9 uchyteného na stěnách skřínky 10 merania. Odporový vyhrievací prvok 2 je napojený na regulovatelný zdroj 11 stabilizovaného jednosměrného prúdu, pričom energetický tok do zariadenia sa meria pomocou voltmetra 12 a ampérmetra 13.
Teploty snímané termočlánkami 3 a 5 sa žaznámenávajú na dvojčiarovom zapisovači 14. Meranie je ukončené vtedy, ked rozdiel teplót snímaných termočlánkami 3 a 5 je ustálený. Podmienkou správného merania je, aby pri ustálenom rozdiele teplót bola teplota snímaná termočlánkom 3 rovnaká ako pri meraní etalonu o známom súčiniteli tepelnej vodivosti.
Zariadenie podl'a vynálezu možno využit hlavně na operativně merania tepelnej vodivosti vo výskume, výrobě a skúšaní stavebných a tepelnoizolačných materiálov a všade tam, kde je třeba zistiť tepelnú vodivost látok.
The solution relates to a device for measuring thermal conductivity by means of standards.
The essence of the device is a heating element arranged in one axis (provided with a heating element (2) on the adjacent side and on the adjacent thermocouple (3) and a cooling body (4) provided on the adjacent side with a thermocouple (5) and on a remote cooler (6) between The heater (1j and the cooling body (4j, as well as the standard or sample to be tested (7) are housed in the insulation segments (8) which, when measured, are adjacent to each other by the hinged spring pressure (9). attached to the walls of the measurement housing (10).
The equipment can be used in research, manufacture and testing of building and insulation materials, as well as wherever thermal conductivity of the substances is ensured.
The device is designed to measure the thermal conductivity of substances by a method in which a portion of the heat flowing outside the test sample is measured using standards of known thermal conductivity coefficient and the heat flux of the test sample is calculated as the difference between developed heat and heat flowing outside the test sample.
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The present invention relates to a device for determining the thermal conductivity of substances in which a part of the heat flowing outside the test sample is determined by measuring standards with a known thermal conductivity coefficient and the heat flowing through the test sample is calculated as the difference between the developed heat and the heat flowing outside the test sample.
Doposia! known thermal conductivity measuring devices are designed to use methods that either create conditions to overcome the heat generated by the test substance quantitatively, or the heat flux is determined by calculation by the test substance. In both cases, or combinations thereof, the equipment is technically demanding and the measurement preparation and measurement process is time consuming.
The essence of the device for measuring the thermal conductivity by means of etalons is that in the axis of the measured heat flux there is arranged a heater provided with a heater element on the adjacent side and a thermocouple on the adjacent thermocouple and a thermocouple on the adjacent side and on a remote cooler between which the standard or sample being stored, the shape and dimensions of the walls perpendicular to the axes of the arrangement of the two bodies, as well as the standard and the test sample are identical and the side walls are parallel to the alignment axis.
In order to achieve repeatable measurement conditions, the heater, the standard or the sample to be tested and the cooling body up to the radiator are housed in insulation segments which abut against each other by the hinged spring pressure retained on the walls of the measuring housing. The advantage of the device is its structural simplicity and simplicity, accelerating the process of preparation and measurement, the possibility of automatic recording of measured temperatures and the possibility of automation of the measurement process.
The drawing schematically shows a vertical section of the device and its connection to a power source and a temperature recorder. In the device according to the drawing, the metal heater 1 is in the form of a regular square prism provided with a resistance heating element 2 and a thermocouple 3 and a metal cooling body 4 of the same shape provided with a thermocouple 5 and a condenser 6.
The standard or sample to be tested 7 is positioned between the metal heating body 1 and the cooling body 4 with which it coincides in the shape and dimensions of the walls perpendicular to the arrangement axis. In order to provide repeatable measurement conditions, the metal heater 1, standard or sample 7 to be tested and the cooling body 4 up to the cooler 6 are housed in segments 8 of foamed polystyrene insulation.
The walls of the individual parts of the device and the insulation abut against each other by the pressure of the hinged spring 9 attached to the walls of the measuring housing 10. The resistance heating element 2 is connected to a controllable source 11 of the stabilized unidirectional current, the energy flow to the device being measured by means of a voltmeter 12 and an ammeter 13.
The temperatures sensed by the thermocouples 3 and 5 are recorded on the twin-plate recorder 14. The measurement is complete when the temperature difference detected by the thermocouples 3 and 5 is stable. A condition for correct measurement is that at a steady temperature difference, the temperature sensed by thermocouple 3 is the same as when measuring a standard with a known thermal conductivity coefficient.
The device according to the invention can be used mainly for operatively measuring the thermal conductivity in the research, production and testing of building and thermal insulation materials and wherever the thermal conductivity of the substances has to be determined.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS844084A CS242498B1 (en) | 1984-05-31 | 1984-05-31 | Device for measuring thermal conductivity using standards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS844084A CS242498B1 (en) | 1984-05-31 | 1984-05-31 | Device for measuring thermal conductivity using standards |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS408484A1 CS408484A1 (en) | 1985-08-15 |
| CS242498B1 true CS242498B1 (en) | 1986-05-15 |
Family
ID=5382810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS844084A CS242498B1 (en) | 1984-05-31 | 1984-05-31 | Device for measuring thermal conductivity using standards |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS242498B1 (en) |
-
1984
- 1984-05-31 CS CS844084A patent/CS242498B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS408484A1 (en) | 1985-08-15 |
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