Method and device for detecting cycle life of chemical heat storage material

Abstract

The invention discloses a method and device for detecting the cycle life of a chemical heat storage material, and the method comprises the steps: enabling inert gas after first temperature adjustment to serve as inlet gas to enter a heat storage material test generator, and enabling outlet gas after the reaction of the heat storage material test generator to be discharged after second temperature adjustment; when the difference between the performance index a of the gas after the first temperature adjustment and the performance index b of the gas after the second temperature adjustment is kept unchanged within a set time or does not exceed a set fluctuation range, a cold liquid medium is introduced into a heat storage material test generator, and a service life test is carried out; or when the difference between the performance index a of the gas after the first temperature adjustment and the performance index b of the gas after the second temperature adjustment reaches the fluctuation range within the set time, the hot liquid medium is introduced into the heat storage material test generator for the service life test. The temperature of the heat storage material service life test generator can be rapidly changed, and the test efficiency and accuracy are improved.

Description

Technical Field

[0001] The invention relates to the technical field of material testing, and in particular to a method and device for detecting the cycle life of a chemical heat storage material. Background Art

[0002] With the increasing demand for energy conservation and consumption reduction, thermal storage technology has been vigorously developed. Due to the high thermal storage density of chemical thermal storage materials, they have been widely studied in the recovery and utilization of waste heat and the alleviation of the imbalance between the supply and demand of thermal energy. Furthermore, since the stable performance and long service life of the material are the guarantee for the long-term safe operation of the thermal storage system, the methods for detecting the performance and life of chemical thermal storage materials have also received widespread attention. The methods used to analyze the thermal storage performance include: FT-IR characterization, thermogravimetric analysis, nitrogen adsorption and desorption characteristics, SEM characterization, etc. However, there is no clear method for analyzing the cycle life of the material. The common practice can be summarized as follows: placing the thermal storage material in a container containing liquid, heating or cooling the liquid, so that the thermal storage material absorbs or releases heat energy; after the absorption and release of heat, the thermal storage material is taken out and placed in a cold fluid for cooling or in a hot fluid for heating; while cyclically absorbing and releasing heat in the cold and hot fluids, the temperature sensor is used to test and record the temperature change of the material and the absorption and release time of the material, so as to judge the life of the material. It can be seen that the above method requires switching between different containers, which is cumbersome, inefficient and has large errors. Summary of the invention

[0003] In view of this, the main purpose of the present invention is to provide a method and device for detecting the cycle life of a chemical thermal storage material, which is easy to operate and accurate in measurement.

[0004] In order to achieve the above-mentioned object of the invention, the first aspect of the present invention provides a method for detecting the cycle life of a chemical thermal storage material, comprising the following steps:

[0005] The inert gas is adjusted at a first temperature and then enters the thermal storage material test generator, and the inert gas from the thermal storage material test generator is adjusted at a second temperature and then discharged;

[0006] Obtaining a performance index a of the gas after the first temperature adjustment and a performance index b of the gas after the second temperature adjustment, and performing the following step A) or step B) after comparing the performance index a with the performance index b;

[0007] A) when the difference between the performance index a of the first temperature-regulated gas and the performance index b of the second temperature-regulated gas remains unchanged within a set time or does not exceed a set fluctuation range, a cold liquid medium is passed into the thermal storage material test generator, and the thermal storage material arranged inside the thermal storage material test generator is subjected to a life test test; or,

[0008] B) When the difference between the performance index a of the first temperature-adjusted gas and the performance index b of the second temperature-adjusted gas reaches the set fluctuation range within the set time, the hot liquid medium is introduced into the thermal storage material test generator, and the thermal storage material arranged inside the thermal storage material test generator is subjected to a life test.

[0009] Furthermore, the first temperature regulation is used for the inert gas to generate saturated water vapor and control the temperature of the water vapor as the inlet gas; and the second temperature regulation is used for controlling the temperature of the outlet gas.

[0010] Furthermore, the performance index a is the temperature and humidity of the gas after the first temperature adjustment or the temperature and humidity of the gas at the inlet of the heat storage material test generator, and the performance index b is the temperature and humidity of the gas after the second temperature adjustment.

[0011] Furthermore, in step A), the time range set is 3-10 minutes.

[0012] Furthermore, in step A) and step B), the fluctuation range is set to (ba) / b≤2%.

[0013] Furthermore, the method further comprises: cyclically switching between step A) and step B).

[0014] Furthermore, the method also includes: controlling the flow rate of the inert gas entering the thermal storage material test generator.

[0015] A second aspect of the present invention provides a chemical thermal storage material cycle life detection device, comprising:

[0016] A gas supply unit, used for providing an inert gas;

[0017] A first gas temperature control unit, comprising a heat transfer medium contained therein and a first gas containing device surrounded by the heat transfer medium, wherein the first gas containing device is used to receive gas from a gas providing unit;

[0018] a first gas buffer unit for receiving gas from the first gas containing device as an inlet gas and monitoring the temperature and humidity of the gas;

[0019] A liquid supply unit, used for providing cold liquid medium and hot liquid medium;

[0020] A thermal storage material test generator, the thermal storage material test generator is used to receive the inlet gas from the first gas buffer unit and the cold liquid medium or the hot liquid medium from the liquid supply unit, and is used to perform a life test on the thermal storage material arranged inside the thermal storage material test generator;

[0021] A second gas temperature control unit, comprising a heat transfer medium contained therein and a second gas containing device surrounded by the heat transfer medium, the second gas containing device being used to receive outlet gas of the thermal storage material test generator;

[0022] The second gas buffer unit is used to receive the gas from the second gas containing device and monitor the temperature and humidity of the gas.

[0023] Furthermore, the device also includes a gas flow control unit for controlling the flow of gas entering the first gas temperature control unit.

[0024] Furthermore, the second gas containing device is also used to receive the gas from the first gas containing device and is connected to the first gas buffer unit as the inlet gas.

[0025] Furthermore, the device also includes a gas temperature sensor arranged at the outlet of the thermal storage material test generator, which is used to measure the temperature of the exhaust gas of the thermal storage material test generator.

[0026] Furthermore, the device further comprises a first liquid temperature sensor disposed at the inlet of the thermal storage material test generator, and / or further comprises a second liquid temperature sensor disposed at the outlet of the thermal storage material test generator.

[0027] Further, the liquid providing unit comprises a liquid cooling device for providing a cold liquid medium, and a liquid heating device for providing a hot liquid medium.

[0028] Furthermore, the thermal storage material test generator includes a reactor temperature-controlled chamber located at the upper end and a life test reaction chamber located at the lower end, the cold liquid medium or the hot liquid medium is passed into the reactor temperature-controlled chamber, the inert gas is passed into the life test reaction chamber, and a chemical thermal storage material is placed in the life test reaction chamber.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] According to the present invention, the inert gas is adjusted at the first temperature and then used as the inlet gas to enter the thermal storage material test generator, and the outlet gas after the reaction of the thermal storage material test generator is adjusted at the second temperature and then discharged; when the difference between the performance index a of the gas after the first temperature adjustment and the performance index b of the gas after the second temperature adjustment remains unchanged or does not exceed the set fluctuation range within the set time, the cold liquid medium is passed into the thermal storage material test generator, and the thermal storage material arranged inside the thermal storage material test generator is subjected to a life test; or, when the difference between the performance index a of the gas after the first temperature adjustment and the performance index b of the gas after the second temperature adjustment reaches the set fluctuation range within the set time, the hot liquid medium is passed into the thermal storage material test generator, and the thermal storage material arranged inside the thermal storage material test generator is subjected to a life test. Thus, the present invention can automatically and alternately replace the cold and hot liquid media by comparing the performance index changes of the inert gas before and after entering the thermal storage material test generator, realize the heat storage and heat release functions of the material, quickly change the temperature of the thermal storage material life test generator, improve the test efficiency and accuracy, and realize automation, avoiding the defects of frequent switching of different containers and cumbersome operation in the prior art.

[0031] Other features and advantages of the present invention will be described in detail through the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 The figure is a schematic structural diagram of a chemical heat storage material cycle life detection device according to an example of the present invention.

[0034] Figure 2 This is a schematic structural diagram of a heat storage material life test generator according to an example of the present invention.

[0035] The accompanying drawings are marked as follows: 1-inert gas cylinder, 2-gas outlet, 3-gas pipe, 4-gas flow controller, 5-water bath, 6-first gas low-temperature constant temperature bath, 7-second gas low-temperature constant temperature bath, 8-inlet gas temperature and humidity sensor, 9-inlet gas buffer bottle, 10-gas flow control valve, 11-gas temperature sensor, 12-outlet gas temperature and humidity sensor, 13-outlet gas buffer bottle, 14-thermal storage material life test generator, 15-second liquid temperature sensor, 16-liquid pipe, 17-liquid outlet electromagnetic valve, 18-liquid heating water tank, 19-liquid inlet solenoid valve, 20-liquid cooling water tank, 21-first liquid temperature sensor, 22-reactor control chamber liquid inlet, 23-reactor control chamber cover, 24-reactor control chamber, 25-fixing nut, 26-sealing gasket, 27-reactor control chamber liquid outlet, 28-test reaction chamber air outlet, 29-high thermal conductivity silicone grease, 30-metal foil, 31-chemical heat storage material, 32-test reaction chamber, 33-test reaction chamber cover, 34-test reaction chamber air inlet. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0038] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] A first aspect of the present invention provides a method for detecting the cycle life of a chemical thermal storage material, comprising the following steps:

[0040] The inert gas is adjusted at a first temperature and then enters the thermal storage material test generator as an inlet gas, and the outlet gas after the reaction of the thermal storage material test generator is adjusted at a second temperature and then discharged;

[0041] Obtaining a performance index a of the gas after the first temperature adjustment and a performance index b of the gas after the second temperature adjustment, and performing the following step A) or step B) after comparing the performance index a with the performance index b;

[0042] A) when the difference between the performance index a of the first temperature-regulated gas and the performance index b of the second temperature-regulated gas remains unchanged within a set time or does not exceed a set fluctuation range, a cold liquid medium is passed into the thermal storage material test generator, and the thermal storage material arranged inside the thermal storage material test generator is subjected to a life test test; or,

[0043] B) When the difference between the performance index a of the first temperature-adjusted gas and the performance index b of the second temperature-adjusted gas reaches the set fluctuation range within the set time, the hot liquid medium is introduced into the thermal storage material test generator, and the thermal storage material arranged inside the thermal storage material test generator is subjected to a life test.

[0044] In the present invention, the first temperature regulation is used for the inert gas to generate saturated water vapor and control the temperature of the water vapor as the inlet gas; the second temperature regulation is used for controlling the temperature of the outlet gas.

[0045] Preferably, the method further comprises: controlling the flow rate of the inert gas entering the thermal storage material test generator, so that the material can fully react while avoiding excessive reaction time, thereby improving efficiency.

[0046] Preferably, the performance indicator a is the temperature and humidity of the gas after the first temperature adjustment or the temperature and humidity of the gas at the inlet of the thermal storage material test generator, and the performance indicator b is the temperature and humidity of the gas after the second temperature adjustment.

[0047] Preferably, in step A), the time range set is 3-10 minutes, exemplarily 5 minutes.

[0048] Preferably, in step A) and step B), the fluctuation range is set to (b a ) / b ≤ 2%. Exemplarily, when the fluctuation within 5 minutes is less than 2%, the reaction of this stage is completed and the pipeline can be switched to another stage, such as step B).

[0049] Preferably, the method further comprises: cyclically switching between step A) and step B) to achieve a cyclic test of the life of the thermal storage material.

[0050] Preferably, the method further comprises: the temperature of the cold liquid medium or the hot liquid medium can be adjusted as needed. It is understandable that those skilled in the art can set it according to the different test materials, for example, the adsorption reaction temperature of each material is different (cold liquid temperature), and the heat storage desorption temperature is also different (hot liquid temperature).

[0051] Preferably, the method further comprises: automatically collecting and recording in real time the temperature and humidity of the gas after the first temperature adjustment, the temperature and humidity of the gas after the second temperature adjustment, the liquid temperature at the inlet of the thermal storage material test generator, and the liquid temperature at the outlet of the thermal storage material test generator through a control system. In this way, real-time automatic online monitoring can be achieved, and data can be recorded for later analysis.

[0052] The cycle life of the phase change material is tested by the method of the present invention, and the material is subjected to continuous multiple melting experiments using cold liquid medium and hot liquid medium. During the experiment, the temperature change data of the inert gas and the liquid medium can be continuously detected, and the data are sent to the data acquisition device and the temperature control switch device respectively. The latter automatically switches the cold liquid medium and the hot liquid medium, while the former records and calculates the change value of the phase change material temperature over time and draws the change curve, thereby determining the phase change point of the phase change material and the relative size of the phase change heat, and measuring the life of the phase change material.

[0053] In order to implement the above detection method, the second aspect of the present invention provides a chemical thermal storage material cycle life detection device, comprising:

[0054] A gas supply unit, used for providing an inert gas;

[0055] A first gas temperature control unit, comprising a heat transfer medium contained therein and a first gas containing device surrounded by the heat transfer medium, wherein the first gas containing device is used to receive gas from a gas providing unit;

[0056] a first gas buffer unit for receiving gas from the first gas containing device as an inlet gas and monitoring the temperature and humidity of the gas;

[0057] A liquid supply unit, used for providing cold liquid medium and hot liquid medium;

[0058] A thermal storage material test generator, the thermal storage material test generator is used to receive the inlet gas from the first gas buffer unit and the cold liquid medium or the hot liquid medium from the liquid supply unit, and is used to perform a life test on the thermal storage material arranged inside the thermal storage material test generator;

[0059] A second gas temperature control unit, comprising a heat transfer medium contained therein and a second gas containing device surrounded by the heat transfer medium, the second gas containing device being used to receive outlet gas of the thermal storage material test generator;

[0060] The second gas buffer unit is used to receive the gas from the second gas containing device and monitor the temperature and humidity of the gas.

[0061] Preferably, the second gas containing device is further used to receive the gas from the first gas containing device and is connected to the first gas buffer unit as the inlet gas.

[0062] In the present invention, the inert gas passes through the first gas temperature control unit before entering the thermal storage material test generator, the purpose is to generate saturated water vapor at the temperature, mainly for humidity regulation; and then passes through the second gas temperature control unit, the purpose is to control the temperature of the saturated water vapor generated above, so that it reaches the temperature required for the reaction as the inlet gas. The humidity of the inert gas coming out of the thermal storage material test generator is different from that of the inlet gas, and the temperature of the outgoing gas will also change due to the heat absorption and release of the material reaction (the gas will heat up or cool down), so the temperature is adjusted by the second gas temperature control unit to make the temperature of the inlet gas and the outlet gas consistent, so as to reduce the measurement error of the humidity.

[0063] Preferably, the device further comprises a gas flow control unit for controlling the flow of gas entering the first gas temperature control unit.

[0064] Preferably, the device further comprises a gas temperature sensor disposed at the outlet of the thermal storage material test generator, for measuring the temperature of the gas at the outlet of the thermal storage material test generator.

[0065] Preferably, the device further comprises a first liquid temperature sensor disposed at the inlet of the thermal storage material test generator, and / or further comprises a second liquid temperature sensor disposed at the outlet of the thermal storage material test generator.

[0066] Preferably, the liquid supply unit comprises a liquid cooling device for providing a cold liquid medium, and a liquid heating device for providing a hot liquid medium.

[0067] Preferably, the thermal storage material test generator includes a reactor temperature-controlled chamber located at the upper end and a life test reaction chamber located at the lower end, the cold liquid medium or the hot liquid medium is passed into the reactor temperature-controlled chamber, the inert gas is passed into the life test reaction chamber, and a chemical thermal storage material is placed in the life test reaction chamber.

[0068] It can be understood that, in the device of the present invention, gas pipes for gas transmission and liquid pipes for liquid transmission can be provided between the units as required.

[0069] It can be understood that in order to realize the switching entry of hot liquid medium or cold liquid medium into the thermal storage material test generator, a switching valve can be set on the liquid transmission pipeline, for example, a first liquid switching valve is set between the liquid cooling device and the thermal storage material test generator to control the entry or closing of the cold liquid medium; a second liquid switching valve is set between the liquid heating device and the thermal storage material test generator to control the entry or closing of the hot liquid medium.

[0070] It is understandable that a gas switching valve or a gas flow control valve may be provided on the gas pipeline between the gas supply unit and the thermal storage material test generator or on the gas pipeline between the first gas temperature control unit and the thermal storage material test generator to control the entry of gas.

[0071] The present invention is further described below with detailed exemplary embodiments, but these embodiments do not constitute any limitation to the present invention.

[0072] See also Figure 1 , a chemical heat storage material cycle life detection device according to an example of the present invention comprises:

[0073] An inert gas cylinder 1, as a gas supply unit, is used to provide inert gas. A gas outlet 2 of the inert gas cylinder 1 is connected to a gas flow controller 4 through a gas pipe 3 to control the flow rate of the gas entering the first gas low-temperature constant temperature bath 6 to be ≤30 mL / min.

[0074] A first gas low temperature constant temperature bath 6, as a first gas temperature control unit, includes water contained inside and a water bath bottle 5 surrounded by water. The water bath bottle 5 is used as a first gas containing device for receiving gas from the inert gas cylinder 1. Under the action of the first gas low temperature constant temperature bath 6, the gas has a certain moisture content. The water bath bottle 5 is provided with a gas inlet and outlet, and a screw-mouth bottle cap is provided on the top;

[0075] The inlet gas buffer bottle 9, as a first gas buffer unit, is used to receive the gas that first passes through the water bath bottle 5 for humidity control and then passes through the second gas low temperature constant temperature bath 7 for temperature control. An inlet gas temperature and humidity sensor 8 is placed inside the inlet gas buffer bottle 9 to monitor the temperature and humidity of the gas;

[0076] The liquid supply unit includes a liquid heating water tank 18 and a liquid cooling water tank 20, which are used to provide constant temperature cold water at a temperature of 0 to 30°C and constant temperature hot water at a temperature of 0 to 100°C respectively;

[0077] A thermal storage material test generator 14, which is used to receive gas from the inlet gas buffer bottle 9 and cold liquid medium or hot liquid medium from the liquid supply unit, and is used to perform a life test on the thermal storage material arranged inside the thermal storage material test generator;

[0078] The second gas low temperature constant temperature bath 7, as a second gas temperature control unit, is used to control the temperature of the inlet gas entering the thermal storage material test generator 14 and the temperature of the outlet gas of the thermal storage material test generator 14, that is, the second gas low temperature constant temperature bath 7 includes water contained inside and a first gas pipe and a second gas pipe surrounded by water, the first gas pipe is used to receive gas from the water bath bottle 5 and is connected to the inlet gas buffer bottle 9 as the inlet gas; the second gas pipe is used to receive the outlet gas of the thermal storage material test generator 14;

[0079] The outlet gas buffer bottle 13, as a second gas buffer unit, is used to receive the gas from the second gas pipe. An outlet gas temperature and humidity sensor 12 is placed inside the outlet gas buffer bottle 13 to monitor the temperature and humidity of the gas.

[0080] The device also includes a gas temperature sensor 11 arranged at the outlet of the thermal storage material test generator, a first liquid temperature sensor 21 arranged at the inlet of the thermal storage material test generator, a second liquid temperature sensor 15 arranged at the outlet of the thermal storage material test generator, and a gas flow control valve 10 is arranged on the gas pipeline at the inlet of the thermal storage material test generator. The thermal storage material test generator 14 (the reactor control room 24 described below) is connected to the liquid outlet solenoid valve 17 through a liquid pipe 16, and the liquid outlet solenoid valve 17 and the liquid inlet solenoid valve 19 are connected to the liquid heating water tank 18 and the liquid cooling water tank 20.

[0081] The device also includes an automatic control system connected to the inlet gas temperature and humidity sensor 8, the outlet gas temperature and humidity sensor 12, the liquid inlet solenoid valve 19, and the liquid outlet solenoid valve 17.

[0082] The first gas low-temperature constant temperature tank 6, the second gas low-temperature constant temperature tank 7, the liquid cooling water tank 20, and the liquid heating water tank 18 are all provided with a water inlet and a water outlet.

[0083] The outside of the inlet gas buffer bottle 9, the outside of the outlet gas buffer bottle 13, the outside of the gas pipe used for gas transmission, and the outside of the liquid pipe used for liquid transmission are all provided with heat preservation devices.

[0084] Figure 2A schematic diagram of the structure of a heat storage material test generator is provided. The heat storage material life test generator 14 is connected to the test reactor control chamber cover 23, the reactor control chamber 24, the sealing gasket 26, the test reaction chamber 32, and the test reaction chamber cover 33 through a fixing nut 25. A chemical heat storage material 31 is placed in the test reaction chamber 32. The chemical heat storage material is coated on a metal foil 30, and the foil is attached to the inner wall of the heat storage material life test reaction chamber through a thermal conductive silicone grease 29. The heat storage material life test generator 14 is provided with a test reaction chamber air inlet 34, a test reaction chamber air outlet 28, a reactor control chamber liquid inlet 22, and a reactor control chamber liquid outlet 27.

[0085] The cycle life detection method of the chemical thermal storage material in the embodiment of the present invention is as follows:

[0086] Manually set the temperature Ta of the first gas low-temperature thermostat, Tb of the second gas low-temperature thermostat, Tc of the liquid cooling water tank, Td of the liquid heating water tank, V of the gas flow controller, install the chemical thermal storage material used for the test in the thermal storage material life test reaction chamber, and the number of test cycles n. Among them, Ta controls the intake humidity, Tb controls the intake temperature, Tc controls the temperature of the material adsorption exothermic reaction process, Td controls the temperature of the material desorption thermal storage reaction process, and V is the set flow rate, which can be large or small, depending on the size of the device and the adsorption capacity of the reaction material. If the gas flow rate is too large, the material will not have time to adsorb and the effect will be poor; if the flow rate is too small, the adsorption time will be long and the efficiency will be low.

[0087] When the temperature of the first gas low temperature constant temperature bath is higher than the set temperature Ta, heating is stopped; when it is lower than the set temperature Ta, heating is automatically turned on;

[0088] When the temperature of the second gas low temperature constant temperature bath is higher than the set temperature Tb, heating is stopped; when it is lower than the set temperature Tb, heating is automatically turned on;

[0089] When the temperature of the liquid cooling water tank is higher than the set temperature Tc, the heating stops and the cooling mode is automatically turned on; when it is lower than the set temperature Tc, the heating starts automatically;

[0090] When the temperature of the liquid heating water tank is higher than the set temperature Td, heating will stop; when it is lower than the set temperature Td, heating will start automatically;

[0091] When the inert gas reaches the required temperature and humidity, switch the gas flow control valve to allow the gas to flow into the thermal storage material life test reaction chamber;

[0092] When the difference between the corresponding temperature and humidity readings of the inlet gas temperature and humidity sensor and the outlet gas temperature and humidity sensor remains unchanged within the set time or does not exceed the set fluctuation range, the control system automatically switches the liquid inlet and outlet solenoid valves to the pipeline where the liquid cooling water tank is located. At this time, the test reactor temperature control room passes cooling liquid;

[0093] When the difference between the corresponding temperature and humidity readings of the inlet gas temperature and humidity sensor and the outlet gas temperature and humidity sensor reaches the set fluctuation range again within the set time, the control system will automatically switch the liquid inlet and outlet solenoid valves to the pipeline where the liquid heating water tank is located. At this time, the test reactor temperature is controlled and the liquid is heated. The cycle is completed once; the control system automatically records the values ​​of the gas inlet and outlet temperature and humidity sensors, the liquid inlet and outlet temperature sensors, the gas temperature sensor values ​​and their corresponding time points;

[0094] When the gas is introduced into the thermal storage material life test reaction chamber, the liquid inlet and outlet control valves are switched to the channel where the heating water tank is located, so that the chemical thermal storage material can be desorbed before the test;

[0095] When the number of cycles is less than the set number n, the control system will continuously switch the hot and cold pipes through the solenoid valve at the appropriate time and repeat the above cycle.

[0096] The composite material prepared from neopentyl glycol (NPG) and bentonite (Ben) was tested by the detection device and method of the present invention, and the temperature range was from room temperature to 50°C. After 30 heat storage cycle life tests, the results showed that the NPG / Ben composite material had stable heat storage performance and a long life.

[0097] In summary, the present invention can alternately replace the cold and hot liquid media by setting the temperature of the first gas low-temperature thermostat and the temperature of the second gas low-temperature thermostat and automatically controlling the switching of the cold and hot liquid pipeline channels according to the performance index changes of the inert gas before and after entering the thermal storage material test generator, thereby realizing the heat storage and heat release functions and effectively improving the efficiency and accuracy of the thermal storage material life test. The thermal storage material life test generator of the present invention has a simple structure, good airtightness, and fast and easy temperature adjustment. The present invention performs cyclic temperature adjustment on the thermal storage material life test reaction chamber through the cold and hot liquid channels, saving the cycle life test time.

[0098] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are within the spirit scope of the present invention.

Claims

1. A method for detecting the cycle life of a chemical heat storage material, characterized in that: It includes the following steps: The inert gas is used as the inlet gas to enter the heat storage material test generator after the first temperature adjustment, and the outlet gas after the reaction of the heat storage material test generator is discharged after the second temperature adjustment; Obtain the performance index a of the gas after the first temperature adjustment and the performance index b of the gas after the second temperature adjustment, and compare the performance index a with the performance index b and then perform the following step A) or step B); A) When the gap between the performance index a of the gas after the first temperature adjustment and the performance index b of the gas after the second temperature adjustment remains unchanged or does not exceed the set fluctuation range within the set time, introduce the cold liquid medium into the heat storage material test generator, and the heat storage material set inside the heat storage material test generator undergoes a life test; Or, B) When the gap between the performance index a of the gas after the first temperature adjustment and the performance index b of the gas after the second temperature adjustment reaches the set fluctuation range within the set time, introduce the hot liquid medium into the heat storage material test generator, and the heat storage material set inside the heat storage material test generator undergoes a life test.

2. The detection method according to claim 1, characterized in that: The first temperature adjustment is used to generate saturated water vapor in the inert gas and control the temperature of the water vapor as the inlet gas; the second temperature adjustment is used to control the temperature of the outlet gas.

3. The detection method according to claim 1, characterized in that: The performance index a is the temperature and humidity of the gas after the first temperature adjustment or the temperature and humidity of the inlet gas of the heat storage material test generator, and the performance index b is the temperature and humidity of the gas after the second temperature adjustment.

4. The detection method according to claim 1, characterized in that: In step A), the set time range is 3 - 5 min; and / or, in step A) and step B), the set fluctuation range is (b - a) / b ≤ 2%.

5. The detection method according to any one of claims 1 - 4, characterized in that: The method further includes: cycling and switching between step A) and step B); and / or, The method further includes: controlling the flow rate of the inert gas entering the heat storage material test generator.

6. A device for detecting the cycle life of a chemical heat storage material, characterized in that: It includes: A gas supply unit for supplying inert gas; A first gas temperature control unit, which includes a heat transfer medium accommodated therein and a first gas accommodation device surrounded by the heat transfer medium, and the first gas accommodation device is used to receive the gas from the gas supply unit; A first gas buffer unit for receiving the gas from the first gas accommodation device as the inlet gas and monitoring the temperature and humidity of the gas; A liquid supply unit for supplying cold liquid medium and hot liquid medium; A heat storage material test generator, which is used to receive the inlet gas from the first gas buffer unit and the cold liquid medium or hot liquid medium from the liquid supply unit, and is used to perform a life test on the heat storage material set inside the heat storage material test generator; A second gas temperature control unit, comprising a heat transfer medium contained therein and a second gas containing device surrounded by the heat transfer medium, the second gas containing device being used to receive outlet gas of the thermal storage material test generator; The second gas buffer unit is used to receive the gas from the second gas containing device and monitor the temperature and humidity of the gas.

7. The detection device according to claim 6, Features: The device also includes a gas flow control unit, which is used to control the flow of gas entering the first gas temperature control unit.

8. The detection device according to claim 6, Features: The second gas containing device is further used to receive the gas from the first gas containing device and is connected to the first gas buffer unit as an inlet gas.

9. The detection device according to claim 6, Features: The device further comprises a gas temperature sensor disposed at the outlet of the thermal storage material test generator, for measuring the temperature of the gas at the outlet of the thermal storage material test generator; and / or, The device also includes a first liquid temperature sensor disposed at the inlet of the thermal storage material test generator, and a second liquid temperature sensor disposed at the outlet of the thermal storage material test generator.

10. The detection device according to any one of claims 6 to 9, Features: The liquid supply unit comprises a liquid cooling device for supplying a cold liquid medium, and a liquid heating device for supplying a hot liquid medium.

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