CN219201432U - Device for measuring specific heat capacity of low-temperature substance - Google Patents
Device for measuring specific heat capacity of low-temperature substance Download PDFInfo
- Publication number
- CN219201432U CN219201432U CN202320054187.8U CN202320054187U CN219201432U CN 219201432 U CN219201432 U CN 219201432U CN 202320054187 U CN202320054187 U CN 202320054187U CN 219201432 U CN219201432 U CN 219201432U
- Authority
- CN
- China
- Prior art keywords
- heating rod
- heat capacity
- specific heat
- measuring
- thermocouple
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model discloses a device for measuring specific heat capacity of low-temperature substances, which belongs to the field of experimental measurement and comprises a heat preservation device and a measuring device, wherein the heat preservation device comprises a heat insulation protective layer, a vacuum jacket and a test cavity from outside to inside; the measuring device comprises a thermocouple, a heating rod, an anchor stirrer, a display and a stabilized voltage supply; the heating rod and the thermocouple are positioned at the bottom of the test cavity, and the heating rod is of fixed power and is directly contacted with the substance to be tested; the device can overcome the error caused by water-proof heating, and shortens the time required for measuring the specific heat capacity.
Description
Technical Field
The utility model belongs to the field of experimental measurement, and particularly relates to a device for measuring specific heat capacity of a low-temperature substance.
Background
Specific heat capacity is one of main thermophysical parameters of substances, is an indispensable important parameter in engineering design of chemical industry, and common chemical substances can be obtained through literature query, but the composition of the substances in the chemical production process is changed greatly, and particularly, the specific heat capacity of a mixture is more difficult to find relevant information in the literature.
Chinese patent No. CN208255110U discloses a weak thermal conductivity material specific heat capacity tester, which has a heat preservation device outside, so as to reduce heat loss; a copper heating rod is arranged in the magnetic rotor to heat the substance to be detected in a water-proof way, and the magnetic rotor is also arranged in the magnetic rotor to stir the substance to be detected; the device monitors the temperature of a substance to be detected and the temperature of water respectively through two temperature sensors, and calculates the specific heat capacity of the substance to be detected through the temperature change of the substance to be detected and the water; the instrument can also measure the specific heat capacity of metals, water-soluble solids, liquids and the like. The tester can reduce experimental errors by measuring the temperature of water and improve the accuracy of a specific heat capacity measuring result, but partial heat can still be taken away by water evaporation in the temperature increasing process, so that deviation occurs in water temperature measurement. Meanwhile, due to the fact that the specific heat capacity of water is large, the heating time is possibly too long, the heat exchange time between the inner space and the external environment is prolonged, and the measurement error is further increased.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a device for measuring the specific heat capacity of a low-temperature substance, which overcomes the error caused by water-proof heating and shortens the time required for measuring the specific heat capacity.
In order to achieve the aim, the device for measuring the specific heat capacity of the low-temperature substance comprises a heat preservation device and a measuring device, wherein the heat preservation device further comprises a heat insulation protection layer and a test cavity, the heat insulation protection layer is wrapped on the outermost side of the heat preservation device, the test cavity is internally provided with a vacuum jacket in an interlayer, and heat exchange can be further blocked; the measuring device also comprises a thermocouple, a heating rod with fixed power, an anchor stirrer, a display and a stabilized voltage supply; the heating rod and the thermocouple are positioned at the bottom of the testing cavity, the connecting wire of the heating rod and the thermocouple passes through the heat preservation device to be connected with the display and the stabilized voltage supply port, and the anchor stirrer is arranged at the center of the testing cavity, so that stirring is more uniform.
Further, the right side of the heat preservation device is provided with a feeding hole above and a discharging hole below respectively.
Further, the heat insulation protection layer is of a cube structure.
Further, the heating rod and the thermocouple are respectively arranged at the left side and the right side of the anchor stirrer, so as to avoid the heating rod from directly heating the thermocouple.
Further, the anchor stirrer is positioned at the bottom center of the test cavity.
Furthermore, the heating rod is made of glass, stainless steel or ceramic, and can be replaced according to different substances to be detected, so that the heating rod is prevented from being corroded by the substances to be detected.
The working principle of the utility model is as follows:
the device for measuring the specific heat capacity of the low-temperature substances comprises a heat preservation device and a measuring device, wherein the heat insulation protection layer and the vacuum jacket are used for weakening heat exchange between the inside of the device and the external environment during testing. The heating rod and the thermocouple are immersed in the substance to be measured to directly heat and measure the temperature of the substance, and an intermediate medium is not used, so that measurement errors are reduced. The anchor stirrer in the test cavity can uniformly mix the substances to be tested, so that the temperature difference between the parts of the substances to be tested is reduced. The heating rod is of fixed power, the heating rod with constant power can calculate the heat release amount of the system only through heating time, and then the specific heat capacity of the substance can be calculated through Q=C.m.delta.T.
The operation steps of the utility model are as follows:
firstly, opening a cover of a feed inlet, weighing a reaction material, adding the reaction material into a test cavity, then screwing the cover of the feed inlet, opening an anchor stirrer to uniformly mix the materials, connecting a thermocouple power line, opening a stabilized voltage power supply, recording the initial temperature of the reaction material, then opening a stabilized voltage power supply switch for controlling a fixed power heating rod, and recording the heating time. And after the heating is finished, the power supply is turned off, the final temperature is recorded, the discharge hole is opened and the device is cleaned, and the specific heat capacity of the material to be measured is calculated according to the formula Q=C.m.delta.T.
The utility model has the beneficial effects that:
according to the utility model, the heating time is controlled by the heating rod with fixed power, so that the heat release amount of the system can be calculated, the heating time can be independently determined according to experimental conditions, the heating rod is directly contacted with the substance to be detected, the substance to be detected is not required to be heated by an intermediate medium, the measurement error generated by the intermediate medium is reduced, and the heating time can be shortened.
Drawings
FIG. 1 is a schematic diagram of a device for measuring specific heat capacity of a low-temperature substance;
in the accompanying drawings: 1 a heat preservation device, 11 a heat insulation protective layer, 12 a vacuum jacket, 13 a test cavity, 14 a feed inlet, 15 a discharge outlet, 2 a measuring device, 21 a heating rod, 22 a thermocouple, 23 an anchor stirrer, 24 a display and 25 a stabilized voltage supply.
Detailed Description
The utility model will now be further described with reference to examples and figures:
as shown in figure 1, the utility model relates to a device for measuring specific heat capacity of low-temperature substances, which comprises a heat preservation device 1 and a measuring device 2, wherein a heat insulation protection layer 11 in the heat preservation device 1 is made of heat preservation materials, and can better prevent heat exchange between the inside and the outside; the internal test cavity 13 has stable material property and certain strength; the vacuum jacket 12 between the test chamber 13 and the thermally insulating protective layer 11 can further block the heat exchange. The heating rod 21 and the thermocouple 22 are immersed in the substance to be measured for the purpose of directly heating and measuring the temperature of the substance, so that errors caused by heating an intermediate medium are avoided; the magnesia powder is used as an insulating material between the heating wire and the external sleeve which are operated in the heating rod 21, so that the heat conduction of the heating wire can be ensured, the electric leakage can be prevented, the external sleeve can be made of glass, stainless steel or ceramic material, and the external sleeve can be replaced correspondingly according to the different substances to be detected; the heating rod 21 is connected with the regulated power supply 25, so that the heating rod 21 can output fixed power, and the heating rod 21 with fixed power can calculate the heat release amount of the system by controlling the heating time, so that the heating rod is simple and convenient.
Taking the specific heat capacity test of the solid-liquid mixture of the aluminum-nickel alloy and water as an example, the operation process of the embodiment is described in detail: firstly, unscrewing a cover of the feed inlet 14, weighing 300g of a mixture of the aluminum-nickel alloy and water, adding the mixture into the test cavity 13, screwing the cover, and opening the anchor stirrer 23 to uniformly mix the substances; the thermocouple power wire is connected to start recording the initial temperature T of the mixture of the aluminum-nickel alloy and water 1 And then a regulated power supply switch for controlling a fixed power heating rod is turned on at 25.3 ℃, the power of the heating rod is 25W, and the turn-on time is 5min. After the heating rod works for 5min, the temperature T of the thermocouple is recorded through a display 2 The heat released by the heating rod with fixed power in 5min at 32.4 ℃ is 7500J, the temperature difference between the aluminum-nickel alloy and water before and after the mixture is tested is 7.1 ℃, and then the specific heat capacity of the mixture of the aluminum-nickel alloy and the water is calculated to be about 3.5J/(g.K) according to the formula Q=C.m.DELTA.T.
The heating rod is directly contacted with the substance to be measured, the influence of an intermediate heating medium is avoided, the heating time is short, and the specific heat capacity of the mixture of the aluminum-nickel alloy and water can be calculated through the formula Q=C.m.delta.T after the heating rod is heated by a power supply for 5min.
The above description is only of the preferred embodiments of the present utility model, and any person skilled in the art may modify the present utility model or make modifications to the present utility model equivalent thereto using the technical solutions described above. Therefore, any simple modification or equivalent made according to the technical solution of the present utility model falls within the scope of the protection claimed by the present utility model.
Claims (6)
1. The utility model provides a survey device of low temperature material specific heat capacity, includes heat preservation device (1) and survey device (2), its characterized in that:
the heat preservation device (1) further comprises a heat insulation protective layer (11) and a test cavity (13), wherein the heat insulation protective layer (11) is wrapped at the outermost side, and a vacuum jacket (12) is arranged in an interlayer of the heat insulation protective layer (11) and the test cavity (13);
the measuring device (2) further comprises a thermocouple (22), a heating rod (21) with fixed power, an anchor stirrer (23), a display (24) and a stabilized voltage supply (25); the heating rod (21) and the thermocouple (22) are positioned at the bottom of the testing cavity (13), a connecting wire of the heating rod (21) and the thermocouple (22) penetrates through the heat preservation device (1) to be connected to a display (24) and a port of the stabilized voltage supply (25), and the anchor stirrer (23) is arranged at the center of the testing cavity (13).
2. A device for measuring specific heat capacity of a cryogenic substance as defined in claim 1, wherein: the right side of the heat preservation device (1) is respectively provided with an upper feed inlet (14) and a lower discharge outlet (15).
3. A device for measuring specific heat capacity of a cryogenic substance as defined in claim 1, wherein: the heat insulation protection layer (11) is of a cube structure.
4. A device for measuring specific heat capacity of a cryogenic substance as defined in claim 1, wherein: the heating rod (21) and the thermocouple (22) are respectively arranged at the center line positions of the left side and the right side of the test cavity (13).
5. A device for measuring specific heat capacity of a cryogenic substance as defined in claim 1, wherein: the anchor stirrer (23) is positioned at the bottom center of the test cavity (13).
6. A device for measuring specific heat capacity of a cryogenic substance as defined in claim 1, wherein: the heating rod (21) is made of glass, stainless steel or ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320054187.8U CN219201432U (en) | 2023-01-09 | 2023-01-09 | Device for measuring specific heat capacity of low-temperature substance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320054187.8U CN219201432U (en) | 2023-01-09 | 2023-01-09 | Device for measuring specific heat capacity of low-temperature substance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219201432U true CN219201432U (en) | 2023-06-16 |
Family
ID=86715288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320054187.8U Active CN219201432U (en) | 2023-01-09 | 2023-01-09 | Device for measuring specific heat capacity of low-temperature substance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219201432U (en) |
-
2023
- 2023-01-09 CN CN202320054187.8U patent/CN219201432U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101718725B (en) | Device for measuring sample thermo-physical property in situ | |
| US8926172B2 (en) | Differential adiabatic compensation calorimeter and methods of operation | |
| Suurkuusk et al. | Design and testing of an improved precise drop calorimeter for the measurement of the heat capacity of small samples | |
| CZ285062B6 (en) | Calorimetric measuring apparatus | |
| Andrews et al. | An adiabatic calorimeter for use at superambient temperatures. The heat capacity of synthetic sapphire (α-Al2O3) from 300 to 550 K | |
| CA1055826A (en) | Apparatus and method for measuring the energy of a chemical reaction | |
| CN219201432U (en) | Device for measuring specific heat capacity of low-temperature substance | |
| CN107796831B (en) | It is a kind of for measuring the microwave calorimeter and its calorimetric method of material microwave fuel factor | |
| CN106706702B (en) | Minor rotation bullet calorimeter | |
| CN208255110U (en) | A kind of weak thermal conductivity material specific heat calorimeter | |
| CN104792821B (en) | Miniature calorimeter | |
| CN102192922A (en) | Heat conductivity coefficient measuring device for high temperature material | |
| CN104964765B (en) | A kind of alternating temperature compensation calorimeter assembly of low critical-temperature liquid mixing Excess Enthalpies | |
| CN109974899B (en) | Adiabatic calorimeter | |
| GB2059585A (en) | Calorimeter | |
| CN205049262U (en) | Alternating temperature compensation calorimeter assembly of low excessive enthalpy of critical temperature liquid mixing | |
| CN201425577Y (en) | Device for determining acid resistance of acid-resistant brick and granite slab | |
| CN110297011A (en) | Calorimetric method is quickly screened in a kind of quasi-adiabatic | |
| CN110096079A (en) | A kind of control system and method for low temperature sample stage | |
| CN209771913U (en) | temperature sensing stirring rake and agitating unit | |
| RU2364845C1 (en) | Differential adiabatic scanning high-pressure microcalorimetre | |
| CN212989219U (en) | Rock-soil body specific heat capacity measuring device | |
| CN1030348C (en) | Thermoelectric couple certificating furnace | |
| CN201047779Y (en) | Electric thermo-couple with temperature correction and monitoring hole | |
| JPH076930B2 (en) | Calorimeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |