Sleeve type phase change energy storage heat exchanger

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By filling the casing-type phase change energy storage materials at specific phase change temperature points in the casing-type phase change energy storage heat exchanger, combined with the casing structure of the dual heat exchange medium, the problem of changing the heat flow density of the thermal terminal users at a certain heating temperature is solved, and the effect of minimum energy consumption and heat flow density adjustment is achieved.

CN222799747UActive Publication Date: 2025-04-25CHANGZHOU HAICA SOLAR HEAT PUMP

View PDF 0 Cites 0 Cited by

Patent Information

Application Number: CN202421437849.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-24
Publication Date: 2025-04-25
Estimated Expiration: 2034-06-24

AI Technical Summary

Technical Problem

The prior art is difficult to effectively regulate the changes in the heat flow density of the thermal terminal users at a certain heating temperature, resulting in large fluctuations in the temperature of the heat exchange medium, affecting production efficiency and increasing energy consumption.

Method used

A casing-type phase change energy storage heat exchanger is adopted to combine the phase change heat exchange with the casing heat exchanger. By filling the phase change energy storage material with a specific phase change temperature point on the outside of the casing interlayer, the casing-type phase change energy storage heat exchange of dual heat exchange media is realized.

Benefits of technology

It realizes time-regulating the heat flow density at constant temperature, reducing energy consumption during the heat exchange process, improving the efficiency of energy utilization, and stabilizing the heat flow density through the peak-cutting and valley-filling effect of phase change energy storage materials.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN222799747U_ABST

Patent Text Reader

Abstract

The utility model discloses a casing pipe type phase change energy storage heat exchanger which comprises a heat exchanger body, a plurality of independent containing spaces are arranged in the heat exchanger body and comprise a first heat exchange medium channel, a second heat exchange medium channel and a cavity, the first heat exchange medium channel is used for allowing a first heat exchange medium to flow, and the second heat exchange medium channel is used for allowing a second heat exchange medium to flow. The second heat exchange medium channel is used for passing of a second heat exchange medium, the cavity is used for storing a phase change energy storage material, the first heat exchange medium and the second heat exchange medium are isolated through the pipe wall of the first heat exchange medium channel and conduct heat exchange, and the second heat exchange medium and the phase change energy storage material are isolated through the pipe wall of the second heat exchange medium channel and conduct heat exchange. Through the mode, the sleeve type phase change energy storage heat exchanger combines phase change heat exchange with a sleeve heat exchanger to form the sleeve type phase change energy storage heat exchanger, has the advantages of simple structure, high heat transfer efficiency and the like, and can adapt to the change of heat flux density required by a heat terminal user at a certain heat supply temperature; and the lowest energy consumption in the heat exchange process is realized.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of phase change energy storage heat exchange, in particular to a sleeve-type phase change energy storage heat exchanger. Background Art

[0002] In the actual production process, the heat flux density of the heat exchange medium required by the thermal energy terminal users is often unstable. Since the heat flux output of the heat source equipment is often not / difficult to adjust, the temperature of the heat exchange medium fluctuates greatly, which directly affects the production effect and significantly increases energy consumption.

[0003] The conventional methods currently used to solve the above problems are:

[0004] 1. By setting the heating temperature and controlling the start and stop of the heat source equipment or the heat exchange medium circulation pump through the temperature difference, it can adapt to the changes in the terminal heat flux density.

[0005] Since the sensible heat stored in the heat exchange medium is limited, the heat source equipment and the heat exchange medium circulation pump are frequently started and stopped, which causes a sharp increase in energy consumption and causes large fluctuations in the temperature of the heat exchange medium, affecting production efficiency. A buffer tank can be added to the heat exchange medium circulation pipeline to reduce the number of frequent starts and stops, but the cost will also increase and the problem cannot be fundamentally solved.

[0006] 2. By setting the heating temperature and controlling the heat source equipment and the heat exchange medium circulation pump through temperature difference frequency conversion, the changes in the terminal heat flux density can be adapted.

[0007] Since many heating equipment cannot be controlled by frequency conversion, such as gas / oil boilers, heat pumps and electric boilers can be controlled by frequency conversion, but: first, it increases the manufacturing cost of the heat source equipment; second, since many end users require a wide range of heat flux density, the operating conditions are mostly outside the high-efficiency area of frequency conversion control, and the actual operating efficiency of the heat source equipment is very poor. Utility Model Content

[0008] The main technical problem solved by the utility model is to provide a shell and tube type phase change energy storage heat exchanger, which combines phase change heat transfer with a shell and tube heat exchanger to form a shell and tube type phase change energy storage heat exchanger, which has the advantages of simple structure and high heat transfer efficiency, and can adapt to the needs of heat terminal users for changes in heat flux density at a certain heating temperature, thereby achieving the lowest energy consumption in the heat exchange process.

[0009] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a shell-and-tube phase-change energy storage heat exchanger, comprising: a heat exchanger body, wherein the heat exchanger body has a plurality of independent accommodating spaces inside, namely, a first heat exchange medium channel, a second heat exchange medium channel and a cavity,

[0010] The heat exchange medium channel 1 is used for passing heat exchange medium 1, the heat exchange medium channel 2 is used for passing heat exchange medium 2, the cavity is used to store phase change energy storage material, heat exchange medium 1 and heat exchange medium 2 are isolated and heat exchanged by the tube wall of the heat exchange medium channel 1, and heat exchange medium 2 and phase change energy storage material are isolated and heat exchanged by the tube wall of the heat exchange medium channel 2.

[0011] In a preferred embodiment of the utility model, the heat exchange medium channel 1 includes multiple groups of heat exchange tubes 1, each group of heat exchange tubes 1 includes multiple heat exchange inner tubes connected in series, and the heat exchange medium channel 2 includes multiple groups of heat exchange tubes 2, each group of heat exchange tubes 2 includes multiple outer tubes connected in series.

[0012] In a preferred embodiment of the utility model, the heat exchange medium 1 passes through the heat exchange inner tube, and the heat exchange medium 2 passes through the outer tube interlayer. The heat exchange medium 1 is a hot medium, and the heat exchange medium 2 is a cold medium. The outer tube interlayer is filled with phase change material.

[0013] In a preferred embodiment of the present invention, the phase change energy storage material is bonded to the outer layer of the outer sleeve, and the outer sleeve is a twisted outer sleeve.

[0014] In a preferred embodiment of the utility model, the heat exchange medium 1 passes through the heat exchange inner tube to form the hot side of the heat exchanger, and the heat exchange medium 2 passes through the twisted outer tube channel to form the cold side of the heat exchanger.

[0015] In a preferred embodiment of the utility model, the heat exchange medium 1 exchanges heat with the heat exchange medium 2 preferentially, the heat exchange medium 2 exchanges heat with the heat exchange medium 1 and the phase change energy storage material directly, and the heat exchange medium 1 exchanges heat with the phase change energy storage material indirectly.

[0016] In a preferred embodiment of the utility model, the heat exchange medium channel has a heat exchange medium inlet end and a heat exchange medium outlet end, and the heat exchange medium inlet end and the heat exchange medium outlet end both extend out of the longitudinal side of the heat exchanger body. After the heat exchange medium flows in from the heat exchange medium inlet end, it flows inside the heat exchange inner tube toward the heat exchange medium outlet end.

[0017] In a preferred embodiment of the utility model, the second heat exchange medium channel has a second heat exchange medium inlet end and a second heat exchange medium outlet end, both of which extend out of the lateral side of the heat exchanger body, and the casing interlayers of adjacent outer casings are connected by a connecting pipe. After the heat exchange medium flows in from the second heat exchange medium inlet end, it flows between the outer casing interlayer and the connecting pipe toward the second heat exchange medium outlet end.

[0018] The beneficial effects of the utility model are as follows: a phase change energy storage material with a specific phase change temperature point is filled into the outside of the casing interlayer, and two adjacent channels carry two different heat exchange media to form a dual heat exchange medium casing phase change energy storage heat exchanger, which plays a role of peak shaving and valley filling through the phase change energy storage material, thereby solving the problem of stable regulation of heat flux density under variable heat flow conditions; since the heat exchange area of the casing heat exchanger is large enough, the heat transfer temperature difference inside the phase change material is very small, thereby realizing small temperature difference heat exchange, and the temperature fluctuation is very small during the heat exchange process; it can adapt to the changes in heat flux density required by heat terminal users at a certain heating temperature, thereby achieving the lowest energy consumption during the heat exchange process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of the shell-and-tube phase-change energy storage heat exchanger of the utility model;

[0021] Figure 2 It is a side view of a preferred embodiment of the shell-and-tube phase-change energy storage heat exchanger of the utility model;

[0022] The markings of the components in the accompanying drawings are as follows: 1. inlet end of heat exchange medium 1, 2. outlet end of heat exchange medium 1, 3. inlet end of heat exchange medium 2, 4. outlet end of heat exchange medium 2, 5. inner heat exchange tube, 6. outer outer tube, 7. phase change energy storage material, 8. connecting tube, 9. heat exchange medium 1, 10. heat exchange medium 2. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The utility model relates to a preferred embodiment of a shell-and-tube type phase-change energy storage heat exchanger.

[0026] See also Figure 1 to Figure 2 The shell-and-tube phase change energy storage heat exchanger includes a heat exchanger body, and the heat exchanger body has multiple independent accommodating spaces inside, namely, a heat exchange medium channel 1, a heat exchange medium channel 2 and a cavity. The heat exchange medium channel 1 is used for heat exchange medium 1 9, the heat exchange medium channel 2 is used for heat exchange medium 2 10, and the cavity is used to store phase change energy storage material 7.

[0027] In an exemplary embodiment, the heat exchange medium channel 1 includes multiple groups of heat exchange tubes 1, each group of heat exchange tubes 1 includes multiple heat exchange inner tubes 5 connected in series, the heat exchange medium channel 2 includes multiple groups of heat exchange tubes 2, each group of heat exchange tubes 2 includes multiple outer tubes 6 connected in series, and the phase change energy storage material 7 is bonded to the outer layer of the outer twisted outer tube 6.

[0028] Preferably, the phase change energy storage material 7 is a thermoplastic resin self-encapsulated phase change energy storage material, and the outer sleeve 6 is a twisted outer sleeve.

[0029] The second heat exchange medium channel is twisted around the outer periphery of the first heat exchange medium channel in a twisted form, and the interlayer formed by the twisting constitutes the second heat exchange medium channel. Each group of the second heat exchange medium channels is connected in series through a connecting pipe at the winding end.

[0030] Furthermore, heat exchange medium 1 9 is a hot medium, which flows through the inner heat exchange tube, and heat exchange medium 2 10 is a cold medium, which flows through the interlayer and connecting tube of the outer shell tube, and the outer layer of the outer shell tube is filled with phase change material.

[0031] The heat exchange medium 1 9 passes through the heat exchange inner tube channel to be the hot side of the heat exchanger, and the heat exchange medium 2 10 passes through the twisted outer tube channel to be the cold side of the heat exchanger. The heat exchange medium 1 9 and the heat exchange medium 2 10 are isolated and heat exchanged by the tube wall of the heat exchange medium 1 channel, and the heat exchange medium 2 10 and the phase change energy storage material 9 are isolated and heat exchanged by the tube wall of the heat exchange medium 2 channel. The heat exchange form adopted between the two heat exchange working fluids is countercurrent heat exchange.

[0032] In an exemplary embodiment, the heat exchange medium channel has a heat exchange medium inlet end 1 and a heat exchange medium outlet end 2, and the heat exchange medium inlet end 1 and the heat exchange medium outlet end 2 both extend out of the longitudinal side of the heat exchanger body. After the heat exchange medium 9 flows into the heat exchange medium inlet end 1, it flows inside the heat exchange inner tube 5 toward the heat exchange medium outlet end 2, forming a serpentine flow.

[0033] In an exemplary embodiment, the second heat exchange medium channel has a second heat exchange medium inlet end 3 and a second heat exchange medium outlet end 4, both of which extend out of the lateral side of the heat exchanger body, and the casing interlayers of adjacent outer casings 6 are connected by a connecting pipe 8. After the heat exchange medium 10 flows into the second heat exchange medium inlet end 3, it flows between the outer casing interlayer and the connecting pipe 10 toward the second heat exchange medium outlet end 4, forming a serpentine flow.

[0034] The heat exchange principle of the shell-and-tube phase-change energy storage heat exchanger of the utility model is:

[0035] The hot fluid working medium flows in the heat exchange inner tube 5, and the cold fluid working medium flows in the interlayer of the outer tube 6. The hot fluid working medium flowing in the heat exchange inner tube 5 heats the cold fluid working medium in the interlayer of the outer tube 6 through the tube wall of the heat exchange inner tube 5:

[0036] When the heating load of the hot fluid working medium is greater than the heating load required by the cold fluid working medium, the temperature of the cold fluid working medium rises and exceeds the phase change temperature of the phase change energy storage material 7 outside the interlayer of the outer sleeve 6. The phase change energy storage material 7 quickly absorbs heat and quickly reduces the temperature of the cold fluid working medium to near the phase change point.

[0037] When the heating load of the hot fluid working medium is less than the heating load required by the cold fluid working medium, the temperature of the cold fluid working medium drops. When it drops below the phase change temperature point of the phase change energy storage material 7, the phase change energy storage material 7 quickly releases heat to raise the temperature of the passing cold fluid working medium to near the phase change point.

[0038] In practical applications, a phase change energy storage material 7 having a specific phase change temperature point is filled in the cavity outside the heat exchange medium channel 6, and the heat exchange medium 1 9 preferentially exchanges heat with the heat exchange medium 2 10, the heat exchange medium 2 10 directly exchanges heat with the heat exchange medium 1 9 and the phase change energy storage material 7, and the heat exchange medium 1 9 indirectly exchanges heat with the phase change energy storage material 7.

[0039] When the phase change energy storage material 7 undergoes a solid-liquid phase change at a specific temperature (phase change temperature), it is accompanied by a large amount of heat absorption and heat release. It has the characteristics of large heat storage density and nearly isothermal during the heat absorption and heat release process. Compared with water storage, it has the advantages of small volume and small storage / release temperature difference. It can be used for time regulation of heat flux density, and can adapt to the changes in heat flux density required by heat terminal users at a certain heating temperature, thereby achieving the lowest energy consumption in the heat exchange process and improving energy utilization efficiency.

[0040] The beneficial effects of the shell-and-tube phase-change energy storage heat exchanger of the utility model are:

[0041] Combining phase change heat exchange with a shell-and-tube heat exchanger to form a shell-and-tube phase change energy storage heat exchanger can achieve time regulation of heat flux density at a constant temperature, which has application significance and broad market prospects;

[0042] Phase change energy storage materials play the role of peak shaving and valley filling, realizing the regulation of heat flux density under variable heat flow conditions;

[0043] Since the heat exchange area of the shell and tube heat exchanger is large enough, the temperature difference of heat transfer inside the phase change material is very small, which solves the problem of small temperature difference heat exchange. The temperature fluctuation is very small during the heat exchange process. It has the advantages of simple structure and high heat transfer efficiency.

[0044] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A shell-and-tube phase-change energy storage heat exchanger, characterized in that: include: The heat exchanger body has a plurality of independent accommodating spaces inside, namely, a first heat exchange medium channel, a second heat exchange medium channel and a cavity. The heat exchange medium channel 1 is used for passing heat exchange medium 1, the heat exchange medium channel 2 is used for passing heat exchange medium 2, the cavity is used to store phase change energy storage material, heat exchange medium 1 and heat exchange medium 2 are isolated and heat exchanged by the tube wall of the heat exchange medium channel 1, and heat exchange medium 2 and phase change energy storage material are isolated and heat exchanged by the tube wall of the heat exchange medium channel 2.

2. The shell-and-tube phase-change energy storage heat exchanger according to claim 1 is characterized in that: The heat exchange medium channel 1 includes multiple groups of heat exchange tubes 1, each group of heat exchange tubes 1 includes multiple series-connected inner heat exchange tubes, and the heat exchange medium channel 2 includes multiple groups of heat exchange tubes 2, each group of heat exchange tubes 2 includes multiple series-connected outer shell tubes.

3. The shell-and-tube phase-change energy storage heat exchanger according to claim 2 is characterized in that: The heat exchange medium 1 goes through the heat exchange inner tube, and the heat exchange medium 2 goes through the outer tube interlayer. The heat exchange medium 1 is a hot medium, and the heat exchange medium 2 is a cold medium. The outer tube interlayer is filled with phase change material.

4. The shell-and-tube phase-change energy storage heat exchanger according to claim 3 is characterized in that: The phase change energy storage material is bonded to the outer layer of the outer sleeve, and the outer sleeve is a twisted outer sleeve.

5. The shell-and-tube phase-change energy storage heat exchanger according to claim 4, characterized in that: The heat exchange medium 1 passes through the heat exchange inner tube to form the hot side of the heat exchanger, and the heat exchange medium 2 passes through the twisted outer tube channel to form the cold side of the heat exchanger.

6. The shell-and-tube phase-change energy storage heat exchanger according to claim 1, characterized in that: The heat exchange medium 1 exchanges heat with the heat exchange medium 2 first, the heat exchange medium 2 exchanges heat with the heat exchange medium 1 and the phase change energy storage material directly, and the heat exchange medium 1 exchanges heat with the phase change energy storage material indirectly.

7. The shell-and-tube phase-change energy storage heat exchanger according to claim 2, characterized in that: The heat exchange medium channel has a heat exchange medium inlet end and a heat exchange medium outlet end, both of which extend out of the longitudinal side of the heat exchanger body. After the heat exchange medium flows into the heat exchange medium inlet end, it flows inside the heat exchange inner tube toward the heat exchange medium outlet end.

8. The shell-and-tube phase-change energy storage heat exchanger according to claim 2, characterized in that: The second heat exchange medium channel has a second heat exchange medium inlet end and a second heat exchange medium outlet end, both of which extend out of the lateral side of the heat exchanger body, and the casing interlayers of adjacent outer casings are connected by a connecting pipe. After the heat exchange medium flows in from the second heat exchange medium inlet end, it flows between the outer casing interlayer and the connecting pipe toward the second heat exchange medium outlet end.