CN102116750B - Device for measuring specific heat capacity of product - Google Patents
Device for measuring specific heat capacity of product Download PDFInfo
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- CN102116750B CN102116750B CN 201110030774 CN201110030774A CN102116750B CN 102116750 B CN102116750 B CN 102116750B CN 201110030774 CN201110030774 CN 201110030774 CN 201110030774 A CN201110030774 A CN 201110030774A CN 102116750 B CN102116750 B CN 102116750B
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- water
- temperature
- baking oven
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Abstract
The invention discloses a device for measuring specific heat capacity of a product. The device comprises a measuring drying oven (1), a water container (2), medium water (21), a first temperature sensor (3), a second temperature sensor (4), a preheating drying oven (6), a heat-insulating valve (7) and a connecting passage (8), wherein the water container in which the medium water is filled is arranged in the measuring drying box; the first temperature sensor is arranged in the water container for detecting water temperature of the medium water; the second temperature sensor is arranged in the measuring drying box for detecting air temperature in the measuring drying box; the air temperature in the measuring drying box changes with change of the water temperature of the medium water through automatic control; the preheating drying box is arranged above the measuring drying box, and the connecting passage with the heat-insulating valve is arranged below the preheating drying box and above the measuring drying box, so that heat loss in a specific heat capacity measuring process is reduced to the greatest extent. Thus, the product is not required to be made into a standard sample block during the measurement of the specific heat capacity; and the aim of measuring the specific heat capacity of the finished product of manufacturing enterprises is fulfilled.
Description
Technical field
The present invention relates to a kind of device of measuring the object specific heat capacity, refer to that specifically manufacturing enterprise is used for manufactured goods are carried out a kind of device of measuring specific heat capacity of product of whole specific heat capacity test.
Background technology
The specific heat capacity of prior art test object, elder generation's cutting sampling on testee is made the sample piece of standard specification, again the sample piece is placed the heated at constant temperature baking oven preheated one-section time, make the equilibrium of sample piece internal and external temperature reach standard preheat temperature value, then the sample piece after the preheating is transferred in the reference fluid water that quality is determined, temperature is determined, measure the temperature rise number of degrees of WATER AS FLOW MEDIUM water temperature, ask and calculate the heat that WATER AS FLOW MEDIUM obtains, and then ask the specific heat capacity of calculating the detected sample piece.
The method of prior art test object specific heat capacity runs into following problem when being applied to manufacturing enterprise: manufacturing enterprise need to carry out whole specific heat capacity test to the manufactured goods object, for example, the contact of device for switching, the element that bimetallic strip is made, these manufactured goods objects are not to be made of same substance, and can not take a sample and make the sample piece of standard specification, in addition, if measured object is thicker, it is longer that the measured object internal heat is delivered in the WATER AS FLOW MEDIUM needed heat balance time, and the time is longer, the temperature rise heat of WATER AS FLOW MEDIUM is just larger by the heat waste that air distributes, thereby has reduced the precision that detects data; If measured object is book too, then in measured object was transferred to process the WATER AS FLOW MEDIUM from constant temperature oven, measured object can reduce the precision that detects data equally by the large percentage of air dissipated heat.Because the heat waste of measured object and WATER AS FLOW MEDIUM heat transferred ambient air in the mensuration process is large and can not ignore, cause the specific heat capacity of goods to measure the precision reduction, therefore, the prior art existence is not suitable with manufacturing enterprise carries out whole specific heat capacity test to the manufactured goods object problems and shortcomings.
Summary of the invention
Problems and shortcomings for above-mentioned prior art existence, the present invention adopts the water receptacle that will fill WATER AS FLOW MEDIUM to place and measures baking oven, the first temperature sensor is set in water receptacle detects the WATER AS FLOW MEDIUM water temperature, the second temperature sensor is set in measuring baking oven comes temperature in the detection assay baking oven, the water temperature that makes the temperature of measuring in the baking oven follow WATER AS FLOW MEDIUM by automatic control changes; In addition, preheating oven is arranged on the top of measuring baking oven, below the inside of preheating oven with above the inside of measuring baking oven an interface channel is being set, the lower end of interface channel is facing to measuring the suitable for reading of the interior water receptacle of baking oven, interface channel arranges the mutually technical scheme of the heat insulation valve of mutual interference of a temperature that is used for isolation preheating oven and mensuration baking oven in the position of the inside of preheating oven, a kind of device of measuring specific heat capacity of product is provided, be intended to by reducing to greatest extent the heat waste of measured object and WATER AS FLOW MEDIUM heat transferred ambient air in specific heat capacity mensuration process after the preheating, make the mensuration of specific heat capacity need not to make standard sample, reach adaptation manufacturing enterprise the manufactured goods object is carried out the purpose that whole specific heat capacity is measured.
The object of the present invention is achieved like this: a kind of device of measuring specific heat capacity of product, comprise and measure baking oven, water receptacle, WATER AS FLOW MEDIUM, the first temperature sensor, the second temperature sensor, preheating oven, heat insulation valve, interface channel, wherein: described mensuration baking oven is by microprocessor control, possesses the Electric heat oven of temperature automatically controlled, demonstration, memory function; Measure the first temperature sensor that is provided with the NTC thermo-sensitive resistor in the baking oven is connected the second temperature sensor and is connected with the microprocessor of measuring baking oven by heat-resisting wire with the NTC thermo-sensitive resistor two temperature sensors; Wherein, the first temperature sensor is for detection of the water temperature of the described WATER AS FLOW MEDIUM of feedback, and the second temperature sensor is measured air themperature in the baking oven for detection of feedback, and places the inner space of measuring baking oven;
Described water receptacle is glass beaker, fills WATER AS FLOW MEDIUM in the water receptacle, and WATER AS FLOW MEDIUM is pure water;
Water receptacle is being contained WATER AS FLOW MEDIUM and is being placed described mensuration baking oven; Described the first temperature sensor places the WATER AS FLOW MEDIUM of water receptacle;
Described preheating oven is for being used for the electric heating constant temperature baking oven of preheating measured object; Preheating oven is arranged on the top of described mensuration baking oven, the below of the inside of preheating oven arranges one in outer heat insulation interface channel with the top of the inside of measuring baking oven, the lower end of interface channel is facing to measuring the suitable for reading of water receptacle in the baking oven, and interface channel arranges the mutually heat insulation valve of mutual interference of a temperature that is used for isolation preheating oven and mensuration baking oven in the position of the inside of preheating oven.
Workflow
Step 1, WATER AS FLOW MEDIUM is preheated in advance a little less than demarcating to pour into behind the temperature value measures in the baking oven in the water receptacle, measure the first temperature sensor in the baking oven and the second temperature sensor by microprocessor automatically control make the water temperature of WATER AS FLOW MEDIUM follow the temperature of measuring in the baking oven to rise to and demarcate temperature value and keep constant, the water temperature of namely measuring the WATER AS FLOW MEDIUM in the water receptacle in the baking oven is followed the temperature of measuring in the baking oven and is raise constant and be consistent; Simultaneously, measured object is placed preheating on the heat insulation valve in the preheating oven, require the preheating set temperature value to be higher than the demarcation temperature value of measuring temperature in the baking oven;
Step 2, be preheated to design temperature when measured object, and after the internal and external temperature equilibrium of measured object, take out out heat insulation valve, make preheating after measured object slip in the WATER AS FLOW MEDIUM of measuring water receptacle in the baking oven along interface channel, and close immediately heat insulation valve;
Simultaneously, measure the first temperature sensor in the baking oven and the second temperature sensor and measure temperature in the baking oven and follow the water temperature of WATER AS FLOW MEDIUM and change by the microprocessor control of automaticallying switch, measure namely that temperature in the baking oven follows that the water temperature of WATER AS FLOW MEDIUM raises and rising and being consistent;
Enter difference between the temperature value that measured object and WATER AS FLOW MEDIUM after the temperature value of the WATER AS FLOW MEDIUM of moment before the WATER AS FLOW MEDIUM and the preheating reach the WATER AS FLOW MEDIUM after the thermal equilibrium by the first temperature sensor recording medium water measured object after preheating, be the temperature rise value of the WATER AS FLOW MEDIUM water temperature before and after measured object and the WATER AS FLOW MEDIUM thermal equilibrium after the preheating, just can ask the specific heat capacity of calculating measured object;
If: the specific heat capacity of measured object is C
3
Known: the weight of measured object is M
3The specific heat capacity of WATER AS FLOW MEDIUM is C
1, weight is M
1The specific heat capacity of glass beaker is C
2, weight is M
2
Record: the temperature rise value of WATER AS FLOW MEDIUM water is Δ t
1The temperature reduction value of measured object is Δ t
2
Relational expression is then arranged:
(C
1·M
1+C
2·M
2)·Δt
1＝C
3·M
3·Δt
2；
So specific heat capacity C of measured object
3=(C
1M
1+ C
2M
2) Δ t
1/ (M
3Δ t
2).
Principle of work
In step 2, measuring the first temperature sensor in the baking oven and the second temperature sensor automatically controls the temperature of measuring in the baking oven by microprocessor and follows the water temperature of WATER AS FLOW MEDIUM and change, and follow and be consistent, according to the second law of thermodynamics, when equating, two object temperatures do not have heat transfer; Because the temperature in the mensuration baking oven is followed WATER AS FLOW MEDIUM water temperature rising variation and is consistent, air is not lost towards periphery for heat in the WATER AS FLOW MEDIUM, the temperature rise that has guaranteed WATER AS FLOW MEDIUM to absorb liberated heat when the measured object temperature reduces after the preheating and obtained does not have heat waste, measured object and WATER AS FLOW MEDIUM have been solved after the minimizing preheating in reaching thermally equilibrated process, especially thermally equilibrated process time is longer, the heat waste problem of heat transferred ambient air; Simultaneously, be limited enclosure space owing to measuring baking oven, the water temperature that the temperature in measuring baking oven is followed WATER AS FLOW MEDIUM changes and measures baking oven Air humidity when changing and be in state of saturation, and therefore, WATER AS FLOW MEDIUM is few because of the mass loss of evaporation, can ignore;
Preheating oven is arranged on the top of measuring baking oven and heat insulation valve and interface channel are set, avoid shifting by instrument the heat waste of measured object after the preheating, solved the heat waste problem that reduces heat transferred ambient air in the process that measured object after the preheating is transferred to WATER AS FLOW MEDIUM;
Because three temperature values, it is the water temperature after initial temperature, the initial temperature of measured object, the heat interchange of WATER AS FLOW MEDIUM finished, all be in the steady temperature situation, to read, thereby avoided making because laboratory technician's self diathesis is not high the problem of test findings generation error to occur.
Above-mentioned, the present invention adopts the water receptacle that will fill WATER AS FLOW MEDIUM to place and measures baking oven, the first temperature sensor is set in water receptacle detects the WATER AS FLOW MEDIUM water temperature, the second temperature sensor is set in measuring baking oven comes temperature in the detection assay baking oven, the water temperature that makes the temperature of measuring in the baking oven follow WATER AS FLOW MEDIUM by automatic control changes; In addition, preheating oven is arranged on the top of measuring baking oven, below the inside of preheating oven with above the inside of measuring baking oven an interface channel is being set, the lower end of interface channel is facing to measuring the suitable for reading of the interior water receptacle of baking oven, interface channel arranges the mutually technical scheme of the heat insulation valve of mutual interference of a temperature that is used for isolation preheating oven and mensuration baking oven in the position of the inside of preheating oven, overcome prior art and had inadaptable problems and shortcomings of the manufactured goods object being carried out whole specific heat capacity test, a kind of device of measuring specific heat capacity of product that provides, by reducing to greatest extent the heat waste of measured object and WATER AS FLOW MEDIUM heat transferred ambient air in specific heat capacity mensuration process after the preheating, make the mensuration of specific heat capacity need not to make standard sample, reached adaptation manufacturing enterprise the manufactured goods object is carried out the purpose that whole specific heat capacity is measured.
Description of drawings
Fig. 1 is a kind of theory structure schematic diagram of measuring the device of specific heat capacity of product of the present invention.
Below in conjunction with the embodiment in the accompanying drawing the present invention is described in further detail, but should not be construed as any limitation of the invention.
Among the figure: measure baking oven 1, water receptacle 2, WATER AS FLOW MEDIUM 21, the first temperature sensor 3, the second temperature sensor 4, measured object 5, preheating oven 6, heat insulation valve 7, interface channel 8.
Embodiment
Consult Fig. 1, a kind of device of measuring specific heat capacity of product of the present invention, comprise and measure baking oven 1, water receptacle 2, WATER AS FLOW MEDIUM 21, the first temperature sensor 3, the second temperature sensor 4, preheating oven 6, heat insulation valve 7, interface channel 8, wherein: described mensuration baking oven 1 is by microprocessor control, possesses the Electric heat oven of temperature automatically controlled, demonstration, memory function; Measure the first temperature sensor 3 that is provided with the NTC thermo-sensitive resistor in the baking oven 1 is connected the second temperature sensor 4 and is connected with the microprocessor of measuring baking oven 1 by heat-resisting wire with the NTC thermo-sensitive resistor two temperature sensors; Wherein, the first temperature sensor 3 is for detection of the water temperature of the described WATER AS FLOW MEDIUM 21 of feedback, and the second temperature sensor 4 is measured air themperature in the baking oven 1 for detection of feedback, and places the inner space of measuring baking oven 1;
Described water receptacle 2 is glass beaker, fills WATER AS FLOW MEDIUM 21 in the water receptacle 2, and WATER AS FLOW MEDIUM 21 is pure water;
Water receptacle 2 is being contained WATER AS FLOW MEDIUM 21 and is being placed described mensuration baking oven 1; Described the first temperature sensor 3 places the WATER AS FLOW MEDIUM 21 of water receptacle 2;
Described preheating oven 6 is for being used for the electric heating constant temperature baking oven of preheating measured object 5; Preheating oven 6 is arranged on the top of described mensuration baking oven 1, the below of the inside of preheating oven 6 arranges one in outer heat insulation interface channel 8 with the top of the inside of measuring baking oven 1, the lower end of interface channel 8 is facing to measuring the suitable for reading of water receptacle 2 in the baking oven 1, and interface channel 8 arranges the mutually heat insulation valve 7 of mutual interference of a temperature that is used for isolation preheating oven 6 and mensuration baking oven 1 in the position of the inside of preheating oven 6.
Workflow
Step 1, WATER AS FLOW MEDIUM 21 is preheated in advance a little less than demarcating to pour into behind the temperature value measures in the baking oven 1 interior water receptacle 2, measure the first temperature sensor 3 in the baking oven 1 and the second temperature sensor 4 by microprocessor automatically control make the water temperature of WATER AS FLOW MEDIUM 21 follow the temperature of measuring in the baking oven 1 to rise to and demarcate temperature value and keep constant, the water temperature of namely measuring the WATER AS FLOW MEDIUM 21 in the baking oven 1 interior water receptacle 2 is followed the temperature of measuring in the baking oven 1 and is raise constant and be consistent; Simultaneously, measured object 5 is placed preheating on the heat insulation valve 7 in the preheating oven 6, require the preheating set temperature value to be higher than the demarcation temperature value of measuring baking oven 1 interior temperature;
Step 2, be preheated to design temperature when measured object 5, and after the internal and external temperature equilibrium of measured object 5, take out out heat insulation valve 7, make that measured object 5 slips in the WATER AS FLOW MEDIUM 21 of measuring baking oven 1 interior water receptacle 2 along interface channel 8 after the preheating, and close immediately heat insulation valve 7;
Simultaneously, measure the first temperature sensor 3 in the baking oven 1 and the second temperature sensor 4 and measure temperature in the baking oven 1 and follow the water temperature of WATER AS FLOW MEDIUM 21 and change by the microprocessor control of automaticallying switch, measure namely that temperature in the baking oven 1 follows that the water temperature of WATER AS FLOW MEDIUM 21 raises and rising and being consistent;
Enter the difference between the temperature value of the WATER AS FLOW MEDIUM 21 after measured object 5 and WATER AS FLOW MEDIUM 21 reach thermal equilibrium after the temperature values of WATER AS FLOW MEDIUM 21 of 21 front moments of WATER AS FLOW MEDIUM and the preheating at measured object after the preheating 5 by the first temperature sensor 3 recording medium water 21, be the temperature rise value of WATER AS FLOW MEDIUM 21 water temperatures before and after measured object 5 and WATER AS FLOW MEDIUM 21 thermal equilibriums after the preheating, just can ask the specific heat capacity of calculating measured object 5;
If: the specific heat capacity of measured object 5 is C
3
Known: the weight of measured object 5 is M
3The specific heat capacity of WATER AS FLOW MEDIUM 21 is C
1, weight is M
1The specific heat capacity of glass beaker is C
2, weight is M
2
Record: the temperature rise value of WATER AS FLOW MEDIUM 21 water is Δ t
1The temperature reduction value of measured object 5 is Δ t
2
Relational expression is then arranged:
(C
1·M
1+C
2·M
2)·Δt
1＝C
3·M
3·Δt
2；
So specific heat capacity C of measured object 5
3=(C
1M
1+ C
2M
2) Δ t
1/ (M
3Δ t
2).
Principle of work
In step 2, measuring the first temperature sensor 3 in the baking oven 1 and the second temperature sensor 4 automatically controls the temperature of measuring in the baking oven 1 by microprocessor and follows the water temperature of WATER AS FLOW MEDIUM 21 and change, and follow and be consistent, according to the second law of thermodynamics, when equating, two object temperatures do not have heat transfer; Because the temperature in the mensuration baking oven 1 is followed WATER AS FLOW MEDIUM 21 water temperatures rising variation and is consistent, air is not lost towards periphery for heat in the WATER AS FLOW MEDIUM 21, the temperature rise that has guaranteed WATER AS FLOW MEDIUM 21 to absorb liberated heat when measured object 5 temperature reduce after the preheatings and obtained does not have heat waste, measured object 5 and WATER AS FLOW MEDIUM 21 have been solved after the minimizing preheating in reaching thermally equilibrated process, especially thermally equilibrated process time is longer, the heat waste problem of heat transferred ambient air; Simultaneously, because measuring baking oven 1 be limited enclosure space, the water temperature that the temperature in measuring baking oven 1 is followed WATER AS FLOW MEDIUM 21 change and when changing mensuration baking oven 1 Air humidity be in state of saturation, therefore, WATER AS FLOW MEDIUM 21 is few because of the mass loss of evaporation, can ignore;
Preheating oven 6 is arranged on the top of measuring baking oven 1 and heat insulation valve 7 and interface channel 8 are set, avoid shifting by instrument the heat waste of measured object 5 after the preheating, solved the heat waste problem that reduces heat transferred ambient air in the process that measured object 5 after the preheating is transferred to WATER AS FLOW MEDIUM 21;
Because three temperature values, it is the water temperature after initial temperature, the initial temperature of measured object 5, the heat interchange of WATER AS FLOW MEDIUM 21 finished, all be in the steady temperature situation, to read, thereby avoided making because laboratory technician's self diathesis is not high the problem of test findings generation error to occur.
Claims (1)
1. device of measuring specific heat capacity of product, it is characterized in that: comprise and measure baking oven (1), water receptacle (2), WATER AS FLOW MEDIUM (21), the first temperature sensor (3), the second temperature sensor (4), preheating oven (6), heat insulation valve (7), interface channel (8), wherein: described mensuration baking oven (1) is by microprocessor control, possesses the Electric heat oven of temperature automatically controlled, demonstration, memory function; Measure and be provided with the first temperature sensor (3) that comprises the NTC thermo-sensitive resistor is connected the second temperature sensor (4) and is connected with the microprocessor of measuring baking oven (1) by heat-resisting wire with the NTC thermo-sensitive resistor two temperature sensors in the baking oven (1); Wherein, the first temperature sensor (3) is for detection of the water temperature of the described WATER AS FLOW MEDIUM of feedback (21), the second temperature sensor (4) is measured air themperature in the baking oven (1) for detection of feedback, and places the inner space of measuring baking oven (1);
Described water receptacle (2) is glass beaker, fills WATER AS FLOW MEDIUM (21) in the water receptacle (2), and WATER AS FLOW MEDIUM (21) is pure water; Water receptacle (2) is being contained WATER AS FLOW MEDIUM (21) and is being placed described mensuration baking oven (1);
Described the first temperature sensor (3) places the WATER AS FLOW MEDIUM (21) of water receptacle (2);
Described preheating oven (6) is for being used for the electric heating constant temperature baking oven of preheating measured object (5); Preheating oven (6) is arranged on the top of described mensuration baking oven (1), the top of the below of the inside of preheating oven (6) and the inside of measuring baking oven (1) arrange one with outer heat insulation interface channel (8), the lower end of interface channel (8) is facing to measuring the suitable for reading of water receptacle (2) in the baking oven (1), and interface channel (8) arranges the mutually heat insulation valve (7) of mutual interference of a temperature that is used for isolation preheating oven (6) and mensuration baking oven (1) in the position of the inside of preheating oven (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110030774 CN102116750B (en) | 2011-01-21 | 2011-01-21 | Device for measuring specific heat capacity of product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110030774 CN102116750B (en) | 2011-01-21 | 2011-01-21 | Device for measuring specific heat capacity of product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102116750A CN102116750A (en) | 2011-07-06 |
| CN102116750B true CN102116750B (en) | 2013-03-27 |
Family
ID=44215616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110030774 Expired - Fee Related CN102116750B (en) | 2011-01-21 | 2011-01-21 | Device for measuring specific heat capacity of product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102116750B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699420B (en) * | 2016-03-01 | 2018-02-27 | 内蒙古科技大学 | A kind of heat-insulating specific heat of solid and heat measurement apparatus and method |
| CN107621479A (en) * | 2017-10-30 | 2018-01-23 | 长安大学 | A kind of rock specific heat capacity measure device and assay method |
| CN108022660B (en) * | 2017-12-07 | 2019-08-13 | 中国核动力研究设计院 | A kind of the heat loss measuring device and its method of system Experiment of Thermophysics device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2852122Y (en) * | 2005-06-27 | 2006-12-27 | 郑志荣 | Apparatus for measuring metal specific heat capacity by cooling method |
| KR100899822B1 (en) * | 2007-10-29 | 2009-05-27 | 한국표준과학연구원 | specific heat measurement device and methode of tree phase composite material using an ultrasound |
| DE102008012758B4 (en) * | 2008-02-29 | 2014-02-13 | Wolfgang Poeßnecker | Method for the simultaneous absolute measurement of the specific heat capacity, the thermal conductivity, the thermal conductivity, the sample density and the heat of transformation of solid materials |
| CN101639455A (en) * | 2009-09-04 | 2010-02-03 | 陈清华 | Method and system for testing thermo-physical property of loose coals |
| CN201945569U (en) * | 2011-01-21 | 2011-08-24 | 宁波双林汽车部件股份有限公司 | Device for measuring specific heat capacity of products |
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2011
- 2011-01-21 CN CN 201110030774 patent/CN102116750B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN102116750A (en) | 2011-07-06 |
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