CN105675647A - Phase-change heat storage testing device and phase-change heat storage testing method - Google Patents

Abstract

The invention belongs to the technical field of building energy storage and energy saving, and in particular relates to a phase change heat storage test device. The phase change heat storage temperature measurement device includes: heat exchange aluminum tube, heat exchange aluminum sheet, iron heat accumulator, plexiglass plate, polystyrene board insulation layer, temperature measuring thermocouple; heat exchange aluminum sheet along the heat exchange aluminum tube The outer periphery is evenly fixed to form a whole, the heat exchange aluminum sheet is placed in the iron heat accumulator, the iron heat accumulator is equipped with a temperature measuring thermocouple, and the polystyrene board insulation layer is fixed outside the iron heat accumulator; The temperature-measuring thermocouple is connected with a temperature inspection instrument and computer equipment to measure and record the internal temperature change of the phase-change thermal storage material. The invention can clearly test the heat storage and heat release of the phase change heat storage material and the temperature change in the heat storage device, the test principle is clear, and the test results are intuitive and accurate; Even the problem that it cannot be reused, in the test project, only low-cost components such as plexiglass sheets need to be replaced, which reduces the test cost.

Description

Phase change heat storage test device and phase change heat storage test method

technical field

The invention belongs to the technical field of building energy storage and energy saving, and in particular relates to a phase change heat storage test device and a phase change heat storage test method.

Background technique

With the improvement of people's living standards and the acceleration of urbanization, building energy consumption has accounted for 27% of the total energy consumption of the whole society. According to the experience of developed countries, building energy consumption will reach more than 30% of the total energy consumption of the whole society. Such a large building energy consumption has undoubtedly caused a huge burden on the whole society, and it is urgent to adopt new technologies for building energy conservation. In buildings, energy demand and supply have a strong dependence on time. In order to solve the contradiction between energy demand and supply imbalance in buildings, improve energy utilization efficiency and protect the environment, building phase change energy storage technology has emerged as the times require. Phase-change energy storage devices can store thermal energy and release thermal energy when needed. It has a very broad application prospect in order to reduce building energy consumption while maintaining indoor comfort.

At present, when building integrated design of phase change materials, the temperature inside the room is usually measured, but there is a lack of substantial research on the amount of phase change materials, heating time, and changes in the internal temperature of phase change materials. The experimental device used in the present invention, which is similar to the phase change material floor heating pipe, measures the temperature change inside the phase change material and the time of heat storage and heat release through thermocouples, so that a deeper understanding of the phase change process can be obtained. At the same time, the heat accumulator and thermocouple in the device can be used repeatedly, and can test various heat storage and heat release conditions, and has the characteristics of low use cost and good operation effect.

Contents of the invention

In order to overcome the defects existing in the prior art, the present invention provides a thermal storage material temperature testing device and a thermal storage material temperature testing method, which has reasonable design, simple structure, accurate measurement, and is convenient for dynamic monitoring of data, which solves the problem of existing problems in technology.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

Phase change heat storage temperature measurement device, including: heat exchange aluminum tube, heat exchange aluminum sheet, iron heat accumulator, plexiglass plate, polystyrene board insulation layer, temperature measurement thermocouple; among them: heat exchange aluminum sheet along the heat exchange The outer circumference of the aluminum tube is evenly fixed to form a whole. The heat exchange aluminum sheet is placed in the iron heat accumulator. The iron heat accumulator is equipped with a temperature measuring thermocouple. outside the device; the temperature-measuring thermocouple is connected to a temperature inspection instrument and computer equipment to measure and record the internal temperature change of the phase-change heat storage material.

Compared with the prior art, the beneficial effects of the present invention are as follows:

(1) It can clearly test the heat storage and heat release of phase change heat storage materials and the temperature change in the heat accumulator, the test principle is clear, and the test results are intuitive and accurate.

(2) Solved the problem that the test iron heat accumulator shell and temperature measuring thermocouple cannot be reused. In the test project, only low-cost components such as plexiglass sheets need to be replaced, which reduces the test cost.

(3) The design of the phase change thermal storage temperature measuring device is reasonable, the structure is simple, the investment cost is low, and the test device and method are very suitable for popularization and implementation.

Description of drawings

Fig. 1 is a schematic structural diagram of a phase change heat storage test device;

Fig. 2 is a device connection organization diagram;

In the figure: 1. Heat exchange aluminum tube, 2. Heat exchange aluminum sheet, 3. Iron heat accumulator, 4. Epoxy resin glue, 5. Organic glass plate, 6. Plasticine, 7. Polystyrene board insulation layer , 8. Hot water inlet, 9. Hot water outlet, 10. Thermal expansion overflow port of phase change heat storage material, 11. Phase change heat storage material, 12. Thermocouple for temperature measurement, 13. Constant temperature water bath, 14. Water pump, 15 , water pipe, 16, temperature inspection instrument, 17, computer.

detailed description

As shown in Figure 1 and Figure 2, the phase change heat storage temperature measuring device includes: heat exchange aluminum tube 1, heat exchange aluminum sheet 2, iron heat accumulator 3, plexiglass plate 5, polystyrene plate insulation layer 7, Temperature measuring thermocouple 12; Wherein

The heat exchange aluminum sheet 2 is uniformly fixed along the outer circumference of the heat exchange aluminum tube 1 to form a whole; the upper part of the heat exchange aluminum tube 1 is a hot water inlet 8, and the lower part of the heat exchange aluminum tube 1 is a hot water outlet 9; the hot water inlet 8 passes through the The water pipe 15 is connected with the pumping constant temperature water bath 13, and high-temperature water is introduced, and the hot water outlet 9 flows out.

The heat exchange aluminum sheet 2 is placed in the iron heat accumulator 3, and the top and bottom of the iron heat accumulator 3 are closed by a plexiglass plate 5; A round hole with the same size, and the heat exchange aluminum tube 1 is set in the round hole; the thermal expansion overflow port 10 of the phase change heat storage material is opened on the organic glass plate 5 at the top, and the thermal expansion overflow port 10 of the phase change heat storage material The diameter is 1-2 mm, and the thermal expansion overflow port 10 of the phase change heat storage material communicates with the outside world to prevent the thermal expansion of the phase change heat storage material and cause the plexiglass plate 5 to crack.

The iron heat accumulator 3 is provided with three holes, and a temperature-measuring thermocouple 12 is installed in the holes. The temperature-measuring thermocouple 12 and the iron heat accumulator 3 are sealed by plasticine 6, and the epoxy resin glue 4 will Temperature-measuring thermocouple 12, plasticine 6, and iron heat accumulator 3 are bonded and fixed; the iron heat accumulator 3 simulates the environment inside the floor heating pipe, making it closer to the needs of practical applications, and has high strength; The plasticine 6 has good ductility and is easy to peel off.

The heat exchange aluminum tube 1 and the plexiglass plate 5 are bonded with epoxy resin glue 4, and the plexiglass plate 5 is bonded with the iron heat accumulator 3; the heat exchange aluminum tube 1 with the heat exchange aluminum sheet 2 , Aluminum is used as the heat transfer material, which has good thermal conductivity.

The polystyrene board heat insulation layer 7 is fixed on the outside of the iron heat accumulator 3 to prevent heat loss of the device; the polystyrene board heat insulation layer 7 has low thermal conductivity and low price to prevent the device from dissipating heat too quickly; the epoxy resin Adhesive 4, which can bond various metals and other non-metals, has strong bonding ability, prevents liquid leakage, and is corrosion-resistant.

The temperature-measuring thermocouple 12 is connected with the temperature inspection instrument 16 and computer equipment 17 to measure and record the internal temperature change of the phase-change heat storage material; the temperature-measuring thermocouple 12 is a K-type needle-shaped thermocouple, which can directly measure the temperature , simple structure, wide measurement range, high precision, and the output signal is convenient for remote transmission.

Phase change heat storage test method, after the test device is connected, heat the constant temperature water bath 13 to the specified temperature, turn on the water pump 14, and introduce the heated water into the heat exchange aluminum tube with the heat exchange aluminum sheet 2 through the hot water inlet 8 1, the heat is further conducted to the phase change heat storage material 11, the inside of the phase change heat storage material 11 transfers heat through convection and conduction, and the temperature measuring thermocouple 12 monitors the temperature dynamics of the tested point inside the phase change heat storage material 11 Change, monitored data by temperature patrol instrument 16, computer 17 records, after a set of data measurement is finished, pull down the water delivery pipe 15 of hot water inlet 8 and hot water outlet 9, then use one of plexiglass plates 5 with heating blade Cut the shell of the iron heat accumulator 3, pour out the liquid phase change heat storage material 11, and use a hard object to destroy the epoxy resin glue 4 and plasticine between the bonded temperature measuring thermocouple 12 and the shell of the iron heat accumulator 3 6. Then take out the temperature measuring thermocouple 12; use a heating blade to separate another plexiglass plate 5 from the iron heat accumulator 3, separate the plexiglass plate 5 from the heat exchange aluminum tube 1, and replace another set of belts of different sizes. Heat exchange aluminum tube 1 with heat exchange aluminum sheet 2, use epoxy resin glue 4 to bond a new set of heat exchange aluminum tube 1, aluminum sheet and new plexiglass plate 5, use epoxy resin glue 4 to bond the plexiglass The plate 5 is bonded to the bottom of the iron heat accumulator 3; insert the temperature measuring thermocouple 12 into the specified position inside the iron heat accumulator 3, use plasticine 6 for preliminary fixing and sealing, and then use epoxy resin glue 4 to place the measured The thermocouple 12, plasticine 6, and iron heat accumulator 3 are bonded together to form a semi-closed container with good sealing performance; the liquid phase-change heat storage material 11 is introduced into the semi-closed container, and then the plexiglass plate 5 bond with the other end of the iron heat accumulator 3, bond the upper end of the heat exchange aluminum tube 1 with the plexiglass plate 5 to form a completely sealed container, then continue to monitor the internal temperature change of the phase change heat storage material 11, and test the heat exchange of different sizes The phase change process in the case of aluminum tube 1 and heat exchange aluminum sheet 2. After the test is completed, use a heated blade to cut off the plexiglass plates 5 at both ends of the iron heat accumulator 3 for testing, and destroy the bonding between the temperature measuring thermocouple 12 and the iron heat accumulator 3, and save various dimensions. The heat exchange aluminum tube 1 with the heat exchange aluminum sheet 2, the iron heat accumulator 3, the temperature measuring thermocouple 12, and the polystyrene board insulation layer 7 are used for the next experiment.

The phase change heat storage device of the present invention puts the phase change heat storage material in the device, so that the internal temperature change of the phase change heat storage material can be dynamically recorded, and the internal heat conduction process and mode of the phase change heat storage material can be revealed. The temperature measurement of the phase change heat storage material by using the phase change heat storage device is simple and convenient. In the phase change heat storage device, there are multiple epoxy resin bondings, so that multiple parts in the device can be reused, and the temperature measurement of the phase change heat storage material is also quite accurate, and the phase change heat storage device of the present invention The design is reasonable, the structure is simple, and the investment cost is low, which is very suitable for popularization and implementation.

Claims (8)

1. A phase change heat storage temperature measuring device, comprising: heat exchange aluminum tube, heat exchange aluminum sheet, iron heat accumulator, plexiglass plate, polystyrene plate insulation layer, temperature measuring thermocouple; it is characterized in that: The hot aluminum sheet is evenly fixed along the outer circumference of the heat exchange aluminum tube to form a whole. The heat exchange aluminum sheet is placed in the iron heat accumulator, and the iron heat accumulator is equipped with a temperature measuring thermocouple. The polystyrene board insulation layer It is fixed outside the iron heat accumulator; the temperature-measuring thermocouple is connected with a temperature inspection instrument and computer equipment to measure and record the internal temperature change of the phase-change heat storage material. 2. The phase change heat storage temperature measuring device according to claim 1, characterized in that the top and bottom of the iron heat accumulator are closed by organic glass plates; the center of the organic glass plate is provided with inner diameter and heat exchange aluminum tubes A round hole with the same outer diameter, and the heat exchange aluminum tube is sleeved in the round hole; the thermal expansion overflow port of the phase change heat storage material is opened on the top plexiglass plate. 3. The phase change heat storage temperature measuring device according to claim 1-2, characterized in that, the iron heat accumulator is provided with three holes, and a temperature measuring thermocouple is installed in the hole, and the temperature measuring thermocouple is connected with the The iron heat accumulator is sealed by plasticine, and the epoxy resin glue is used to bond and fix the temperature measuring thermocouple, plasticine, and iron heat accumulator. 4. The phase change heat storage temperature measuring device according to claim 1-3, characterized in that, the organic glass plate of the heat exchange aluminum tube is bonded with epoxy resin, and the organic glass plate is bonded to the iron heat accumulator. Knot. 5. The phase change thermal storage temperature measuring device according to claim 1-4, characterized in that the thermal expansion overflow port of the phase change thermal storage material has a diameter of 1 to 2 mm, and the thermal expansion overflow port of the phase change thermal storage material is in contact with the outside world. connected. 6. The phase change heat storage temperature measuring device according to claim 1-5, characterized in that the upper part of the heat exchange aluminum tube is a hot water inlet, and the lower part of the heat exchange aluminum tube is a hot water outlet; The water pipe is connected with the pumping constant temperature water bath, the high temperature water is introduced, and the hot water flows out from the hot water outlet. 7. The phase change thermal storage temperature measuring device according to claim 1-6, characterized in that the temperature measuring thermocouple is a K-type needle thermocouple. 8. A phase change heat storage test method, using the phase change heat storage temperature measuring device according to any one of claims 1-7, characterized in that, after the test device is connected, the constant temperature water bath is heated to the specified temperature, and the water pump is turned on , the heated water is introduced into the heat exchange aluminum tube with the heat exchange aluminum sheet through the hot water inlet, and then the heat is transferred to the phase change heat storage material, and the heat is transferred inside the phase change heat storage material through convection and conduction , the temperature measuring thermocouple monitors the dynamic temperature change of the tested point inside the phase change heat storage material, and the data is monitored by the temperature inspection instrument and recorded by the computer. After a set of data is measured, the water delivery pipes of the hot water inlet and hot water outlet are removed , and then use a heating blade to cut one of the plexiglass plates and the iron heat accumulator shell, pour out the liquid phase change heat storage material, and use a hard object to destroy the bond between the temperature measuring thermocouple and the iron heat accumulator shell Epoxy resin glue and plasticine, and then take out the temperature measuring thermocouple; use a heating blade to separate another plexiglass plate from the iron heat accumulator, separate the plexiglass plate from the heat exchange aluminum tube, and replace another set of different sizes For heat exchange aluminum tubes with heat exchange aluminum sheets, use epoxy resin glue to bond a new set of heat exchange aluminum tubes, aluminum sheets and new plexiglass plates, and use epoxy resin glue to bond the plexiglass plates to the iron storage Bond the bottom of the heater; insert the temperature measuring thermocouple into the specified position inside the iron heat accumulator, use plasticine for preliminary fixing and sealing, and then use epoxy resin glue 4 to connect the temperature measuring thermocouple, plasticine, and iron heat accumulator Heaters are bonded together to form a semi-closed container with good sealing performance; the liquid phase change heat storage material is introduced into the semi-closed container, and then the plexiglass plate is bonded to the other end of the iron heat accumulator to transfer heat The upper end of the aluminum tube 1 is bonded with the plexiglass plate to form a completely sealed container, and then continue to monitor the temperature change inside the phase change heat storage material, and test the phase change process under the conditions of different sizes of heat exchange aluminum tubes and heat exchange aluminum sheets. After the test is completed, use a heated blade to cut off the plexiglass plates at both ends of the test iron heat accumulator, and destroy the bonding between the temperature measuring thermocouple and the iron heat accumulator, and save various sizes The heat exchange aluminum tube of the hot aluminum sheet, the iron heat accumulator, the thermocouple for temperature measurement, and the insulation layer of the polystyrene board are used for the next experiment.