Multi-heat-source heating type absorption heat pump

Abstract

The invention provides a multi-heat-source heating type absorption heat pump which comprises an absorber, an evaporator, a generator and a condenser, the absorber is provided with one or more groups of heat transfer tube bundles, each group of heat transfer tube bundles are not communicated with one another, and each group of heat transfer tube bundles and water chambers of the heat transfer tube bundles are connected with different medium-temperature heat sources; the condenser is provided with one or more groups of heat transfer tube bundles, each group of heat transfer tube bundles are not communicated with one another, and each group of heat transfer tube bundles and water chambers thereof are connected with different medium-temperature heat sources; and different medium-temperature heat sources are connected in series, in parallel or in series-parallel connection between each group of absorber heat transfer tube bundles and condenser heat transfer tube bundles. The medium-temperature heat source heating device can heat multiple different medium-temperature heat sources at the same time, and has high adaptability and flexibility. Different heat sources can be connected and configured according to actual requirements, various heating requirements can be met, and the temperatures, the flows and the heat loads of different medium-temperature heat sources can be accurately adjusted.

Description

Technical Field

[0001] This invention relates to the field of energy utilization equipment technology, and in particular to a multi-heat source heating absorption heat pump. Background Technology

[0002] Heat-enhanced absorption heat pumps, also known as Class I absorption heat pumps, especially those using lithium bromide-water as the working fluid, are widely used in power plant waste heat recovery, circulating water waste heat recovery, gas flue gas waste heat recovery, coal flue gas waste heat recovery, and industrial waste heat recovery. These heat-enhanced lithium bromide absorption heat pumps recover waste heat for heating or heating process media, effectively reducing energy waste and improving overall energy efficiency. A typical heat-enhanced lithium bromide absorption heat pump consists of four main components: a generator, a condenser, an absorber, and an evaporator. External heat sources entering the system include high-temperature, low-temperature, and medium-temperature heat sources. High-temperature heat sources enter the generator as the driving heat source, low-temperature heat sources enter the evaporator, and medium-temperature heat sources enter the absorber and condenser to absorb heat. This achieves the goal of recovering heat from low-temperature heat sources under the drive of high-temperature heat sources, and using it to heat medium-temperature heat sources.

[0003] In traditional heat-enhancing lithium bromide absorption heat pumps, the intermediate-temperature heat source of a single heat pump is typically a single medium connected in parallel or series with the absorber and condenser for heating. When the intermediate-temperature heat source is multiple different media, for example, with varying types, temperatures, pressures, and flow rates, the current conventional approach is to divide the absorption heat pump into multiple units, with each medium's intermediate-temperature heat source entering a different heat pump to absorb heat, thus meeting the heating requirements of different intermediate-temperature heat sources. This approach significantly increases the number of equipment, investment, and floor space required for the project, and also increases the complexity of the entire thermal system, posing challenges to the project's economic viability and feasibility. Therefore, it is necessary to develop a multi-heat-source heat-enhancing absorption heat pump. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-heat-source heating absorption heat pump that can simultaneously heat multiple different medium-temperature heat sources with a single heat pump. The temperature, flow rate, heat load of different media and the corresponding heat transfer tubes can be flexibly designed according to requirements, thereby significantly reducing the total number of heat pumps in the project, thus reducing equipment investment and saving the overall equipment footprint, while simplifying the entire thermal system.

[0005] According to one objective of the present invention, a multi-heat-source heat-enhancing absorption heat pump is provided, comprising an absorber, an evaporator, a generator, and a condenser. The heat transfer tube bundles of the absorber are in one or more groups, and each group of heat transfer tube bundles is not interconnected. Each group of heat transfer tube bundles and its water chamber are connected to different medium-temperature heat sources. The different medium-temperature heat sources are connected in series, in parallel, or in a series-parallel connection between the heat transfer tube bundles of the absorber and the heat transfer tube bundles of the condenser.

[0006] Furthermore, the absorber is also provided with an absorber liquid distribution device, which is connected to the housing of the generator to form a first solution pipeline; the generator is provided with a generator liquid distribution device, which is connected to the housing of the absorber to form a second solution pipeline; the first solution pipeline and the second solution pipeline are respectively connected to the solution heat exchanger.

[0007] Furthermore, the evaporator is equipped with an evaporator liquid distribution device, which is connected to a low-temperature heat source and communicates with the shell of the condenser.

[0008] Furthermore, the evaporator is equipped with a primary refrigerant water distribution device, which is connected to the shell of the condenser.

[0009] Furthermore, it also includes a solution pump connected to the first solution pipeline.

[0010] Furthermore, it also includes a refrigerant pump connected between the evaporator housing and the evaporator liquid distribution device.

[0011] Furthermore, the absorber and the condenser are single-stage or multi-stage, with each stage corresponding to the other. The heat transfer tube bundles and water chambers of the absorber and the condenser in each stage are divided into multiple groups, wherein different medium-temperature heat sources are connected in series, parallel, or series-parallel between the heat transfer tube bundles of the absorber and the condenser in each group.

[0012] Furthermore, the positions of each group of absorber heat transfer tube bundles and the number of heat transfer tubes in the condenser are determined according to the load and inlet / outlet temperatures of the different medium-temperature heat sources being heated.

[0013] Furthermore, the heat transfer tube bundle of the absorber is in multiple groups, and a portion of the heat transfer tube bundle is connected to a medium-temperature heat source A, while another portion is connected to a medium-temperature heat source B. The heat transfer tube bundles of the absorber are connected in series or in parallel with the heat transfer tube bundles of the condenser.

[0014] Furthermore, the connection between the medium-temperature heat source and the heat transfer tube bundles of each group of absorbers and condensers is in series, parallel, or series-parallel connection.

[0015] The technical solution of this invention can simultaneously heat multiple different medium-temperature heat sources, exhibiting high adaptability and flexibility. Different heat sources can be connected and configured according to actual needs, not only meeting various heating requirements but also enabling precise adjustment of the temperature, flow rate, and heat load of different medium-temperature heat sources. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 6 of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of Embodiment 7 of the present invention;

[0024] In the diagram: 1. Absorber; 1-1. Heat transfer tube bundle of the first part of the absorber; 1-2. Heat transfer tube bundle of the second part of the absorber; 13. Liquid distribution device of the absorber.

[0025] 2. Condenser; 2-1. First part of the condenser heat transfer tube bundle; 2-2. Second part of the condenser heat transfer tube bundle;

[0026] 3. Generator; 31. Generator heat transfer tube bundle; 33. Generator liquid distribution device;

[0027] 4. Evaporator; 41. Primary refrigerant water distribution device; 42. Evaporator heat transfer tube bundle; 43. Evaporator liquid distribution device;

[0028] 5. High-temperature heat source; 6. Low-temperature heat source; 7. Solution heat exchanger;

[0029] 101. Solution pump; 102. Refrigerant pump. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example 1

[0034] like Figures 1-7 As shown:

[0035] A multi-heat-source heating absorption heat pump includes an absorber 1, an evaporator 4, a generator 3, a condenser 2, and a solution heat exchanger 7.

[0036] The heat transfer tube bundle of absorber 1 can be divided into N groups, N≥1, the first part of the absorber heat transfer tube bundle 1-1, the second part of the absorber heat transfer tube bundle 1-2... the Nth part of the absorber heat transfer tube bundle 1-N, the water chambers corresponding to each group of heat transfer tube bundles are not connected to each other, and each group of heat transfer tube bundles and its water chambers are connected to different medium-temperature heat sources.

[0037] The heat transfer tube bundle of condenser 2 can be divided into M groups, M≥1, the first part of the condenser heat transfer tube bundle 2-1, the second part of the condenser heat transfer tube bundle 2-2... the Mth part of the condenser heat transfer tube bundle 2-M, the water chambers corresponding to each group of heat transfer tube bundles are not connected to each other, and each group of heat transfer tube bundles and its water chambers are connected to different medium-temperature heat sources.

[0038] Different medium-temperature heat sources can be connected in series, parallel, or series-parallel between the heat transfer tube bundles of each absorber and condenser.

[0039] The positions and number of heat transfer tubes in each group of absorber heat transfer tube bundles and condenser heat transfer tube bundles are determined based on the load and inlet / outlet temperatures of the different medium-temperature heat sources being heated.

[0040] The absorber 1 is also provided with an absorber liquid distribution device 13, which is located above the absorber heat transfer tube bundle. The absorber liquid distribution device 13 is connected to the shell of the generator 3 to form the first solution pipeline.

[0041] Evaporator 4 is equipped with evaporator heat transfer tube bundle 42, which is connected to low temperature heat source 6.

[0042] The generator 3 is equipped with a generator heat transfer tube bundle 31, which is connected to the high-temperature heat source 5.

[0043] The generator 3 is also equipped with a generator liquid distribution device 33, which is located above the generator heat transfer tube bundle 31. The generator liquid distribution device 33 is connected to the shell of the absorber 1 to form a second solution tube bundle.

[0044] The first solution pipeline and the second solution pipeline are respectively connected to the solution heat exchanger 7;

[0045] The evaporator 4 is equipped with a primary refrigerant water distribution device 41, which is connected to the shell of the condenser 2; the evaporator 4 is also equipped with an evaporator distribution device 43.

[0046] The device in this embodiment also includes a solution pump 101, which is connected to the first solution pipeline;

[0047] The device in this embodiment also includes a refrigerant pump 102, which is connected between the housing of the evaporator 4 and the evaporator liquid distribution device 43.

[0048] Absorber 1 and evaporator 4 are single-stage or multi-stage, generator 3 and condenser 2 are single-stage or multi-stage, each stage corresponds to the other, and the heat transfer tube bundles and water chambers of each stage of absorber 1 and condenser 2 can also be divided into multiple groups. Different medium-temperature heat sources can be connected in series, in parallel or in series-parallel connection between the heat transfer tube bundles of each group of absorber and condenser.

[0049] like Figure 1 As shown, in this embodiment, there are medium-temperature heat sources A, B, and C. Medium-temperature heat source A is connected to the inlet and outlet of the heat transfer tube bundle 1-2 in the second part of the absorber; the inlet of medium-temperature heat source B is connected to the inlet of the heat transfer tube bundle 1-1 in the first part of the absorber.

[0050] The outlet of the first part of the heat transfer tube bundle 1-1 of the absorber is connected to the inlet of the first part of the heat transfer tube bundle 2-1 of the condenser, and the outlet of the first part of the heat transfer tube bundle 2-1 of the condenser is connected to the outlet of the medium-temperature heat source B.

[0051] The inlet and outlet of the medium-temperature heat source C are connected to the inlet and outlet of the heat transfer tube bundle 2-2 in the second part of the condenser.

[0052] Example 2

[0053] like Figure 2 As shown, in this embodiment, there are medium-temperature heat sources A and B. Medium-temperature heat source A is connected to the inlet of the heat transfer tube bundle 1-2 of the second part of the absorber. The outlet of the heat transfer tube bundle 1-2 of the second part of the absorber is connected to the inlet of the heat transfer tube bundle 2-2 of the second part of the condenser. The outlet of the heat transfer tube bundle 2-2 of the second part of the condenser is connected to the outlet of the medium-temperature heat source A.

[0054] The medium-temperature heat source B is connected to the inlet of the first part of the heat transfer tube bundle 1-1 of the absorber, the outlet of the first part of the heat transfer tube bundle 1-1 of the absorber is connected to the inlet of the first part of the heat transfer tube bundle 2-1 of the condenser, and the outlet of the first part of the heat transfer tube bundle 2-1 of the condenser is connected to the outlet of the medium-temperature heat source B.

[0055] Example 3

[0056] like Figure 3 As shown, in this embodiment, the absorber 1 has only one set of heat transfer tube bundle 1-1 in the first part of the absorber, with medium-temperature heat sources A and B. The medium-temperature heat source A is connected to the inlet of the heat transfer tube bundle 1-1 in the first part of the absorber, the outlet of the heat transfer tube bundle 1-1 in the first part of the absorber is connected to the inlet of the heat transfer tube bundle 2-2 in the second part of the condenser, and the outlet of the heat transfer tube bundle 2-2 in the second part of the condenser is connected to the outlet of the medium-temperature heat source A.

[0057] The inlet and outlet of the medium-temperature heat source B are connected to the inlet and outlet of the heat transfer tube bundle 2-1 in the first part of the condenser, respectively.

[0058] Example 4

[0059] like Figure 4As shown in this embodiment, both the absorber 1 and the condenser 2 have only one set of heat transfer tube bundles, with medium-temperature heat sources A and B. The inlet and outlet of medium-temperature heat source A are connected to the inlet and outlet of the first part of the heat transfer tube bundle 1-1 of the absorber, and the inlet and outlet of medium-temperature heat source B are connected to the inlet and outlet of the first part of the heat transfer tube bundle 2-1 of the condenser.

[0060] Example 5

[0061] like Figure 5 As shown, in this embodiment, an absorption heat pump with a two-stage generation-condensation and a two-stage evaporation-absorption process is provided. Each stage absorber 1 and condenser 2 has only one set of heat transfer tube bundles, and there are medium-temperature heat sources A and B. The medium-temperature heat source A is connected in series with the first part of the heat transfer tube bundle 1-1 of the absorber of the first stage absorber 1 and the first part of the heat transfer tube bundle 2-1 of the condenser of the first stage condenser 2.

[0062] The medium-temperature heat source B is connected in series with the heat transfer tube bundle 1-2 of the second part of the absorber of the second-stage absorber 1 and the heat transfer tube bundle 2-2 of the second part of the condenser of the second-stage condenser 2.

[0063] Example 6

[0064] like Figure 6 As shown, in this embodiment, an absorption heat pump with a two-stage generation-condensation and a two-stage evaporation-absorption process is provided. Each stage of the absorber 1 and condenser 2 has only one set of heat transfer tube bundles, with medium-temperature heat sources A and B. Medium-temperature heat source A is connected in series with the first part of the heat transfer tube bundle 1-1 of the first stage absorber 1 and the first part of the heat transfer tube bundle 1-1 of the second stage absorber 1. Medium-temperature heat source B is connected in series with the first part of the heat transfer tube bundle 2-1 of the condenser 2 and the first part of the condenser 2.

[0065] Example 7

[0066] like Figure 7 As shown, in this embodiment, an absorption heat pump with a two-stage generation-condensation and a two-stage evaporation-absorption process is provided. The heat transfer tube bundle of the first-stage absorber 1 is divided into two parts. Each of the other absorbers 1 and condensers 2 has only one set of heat transfer tube bundles. There are medium-temperature heat sources A and B. The inlet and outlet of the medium-temperature heat source A are respectively connected to the inlet and outlet of the heat transfer tube bundle 1-1 of the first part of the absorber of the first-stage absorber 1.

[0067] The medium-temperature heat source B is connected in series with the heat transfer tube bundle 1-2 of the second part of the absorber of the first-stage absorber 1, the heat transfer tube bundle 1-1 of the first part of the absorber of the second-stage absorber 1, the heat transfer tube bundle 2-1 of the first part of the condenser of the first-stage condenser 2, and the heat transfer tube bundle 2-1 of the first part of the condenser of the second-stage condenser 2.

[0068] The multi-heat-source heating absorption heat pump of this invention can simultaneously heat multiple different medium-temperature heat sources, exhibiting high adaptability and flexibility. Different heat sources can be connected and configured according to actual needs, not only meeting various heating requirements but also allowing for precise adjustment of the temperature, flow rate, and heat load of different medium-temperature heat sources.

[0069] This invention utilizes a single heat pump to heat multiple medium-temperature heat sources, significantly reducing the number of heat pumps required. This design effectively lowers equipment investment in projects and avoids the need for a separate heat pump for each heat source, thus saving substantial funds. Since the heating function of multiple heat sources is completed by a single heat pump, compared to traditional designs requiring multiple devices, this invention greatly reduces the equipment footprint. The space saved allows for a more compact system layout, making it suitable for use in environments with limited space.

[0070] This invention simplifies the structure of the entire thermal system by integrating the heating functions of multiple heat sources. It eliminates the need for complex multi-device collaboration, reducing system complexity and simplifying piping connections, control systems, and maintenance, resulting in a more efficient and reliable overall system.

[0071] Because different medium-temperature heat sources have varying heat loads, flow rates, and temperatures, this invention allows for flexible configuration of the number, location, and flow channel design of heat transfer tubes according to requirements. This customized design can optimize the operating efficiency of the heat pump, improve energy efficiency, and ensure the heating effect of each heat source.

[0072] Multiple heat source configurations allow the heat pump to dynamically adjust according to the needs of different heat sources, thereby improving the heat pump's operating efficiency and energy efficiency ratio. Increased overall system efficiency translates to reduced energy consumption, while operating costs are effectively controlled.

[0073] In summary, the multi-heat-source heat-enhancing absorption heat pump provided by this invention has significant beneficial effects in reducing equipment costs, saving space, simplifying system structure, and improving efficiency, and is particularly suitable for application scenarios that require the simultaneous use of multiple heat sources.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-heat source heat-increasing absorption heat pump, characterized in that: The invention comprises an absorber, an evaporator, a generator and a condenser. The heat transfer tube bundle of the absorber is one or more groups, each group of heat transfer tube bundles is not interconnected, and each group of heat transfer tube bundles and its water chamber are connected to different medium-temperature heat sources; the heat transfer tube bundle of the condenser is one or more groups, each group of heat transfer tube bundles is not interconnected, and each group of heat transfer tube bundles and its water chamber are connected to different medium-temperature heat sources; different medium-temperature heat sources are connected in series, in parallel or in series and parallel between each group of absorber heat transfer tube bundles and condenser heat transfer tube bundles.

2. The multi-heat source heat-increasing absorption heat pump according to claim 1, characterized in that: The absorber is also provided with an absorber liquid distribution device, which is connected to the shell of the generator to form a first solution pipeline; the generator is provided with a generator liquid distribution device, which is connected to the shell of the absorber to form a second solution pipeline; the first solution pipeline and the second solution pipeline are respectively connected to the solution heat exchanger.

3. The multi-heat source heat-increasing absorption heat pump according to claim 2, characterized in that: The evaporator is provided with an evaporator liquid distribution device, which is connected to a low-temperature heat source and communicated with a shell of the condenser.

4. The multi-heat source heat-increasing absorption heat pump according to claim 1, characterized in that: The evaporator is provided with a primary refrigerant water liquid distribution device, and the primary refrigerant water liquid distribution device is communicated with the shell of the condenser.

5. The multi-heat source heat-increasing absorption heat pump according to claim 3, characterized in that: It also includes a solution pump, which is connected to the first solution pipeline.

6. The multi-heat source heat-increasing absorption heat pump according to claim 5, characterized in that: It also includes a refrigerant pump, which is connected between the shell of the evaporator and the evaporator liquid distribution device.

7. The multi-heat source heat-increasing absorption heat pump according to claim 1, characterized in that: The absorber and the condenser are single-stage or multi-stage, each stage corresponds to each other, and the heat transfer tube bundles and water chambers of the absorber and the condenser of each stage are divided into multiple groups, wherein different medium-temperature heat sources are connected in series, in parallel, or in series and parallel between each group of absorber heat transfer tube bundles and condenser heat transfer tube bundles.

8. The multi-heat source heat-increasing absorption heat pump according to claim 1, characterized in that: The positions of the absorber heat transfer tube bundles and the condenser heat transfer tube bundles and the number of heat transfer tubes thereof are determined according to the loads and inlet and outlet temperatures of the different medium-temperature heat sources to be heated.

9. The multi-heat source heat-increasing absorption heat pump according to claim 1, characterized in that: The absorber has multiple heat transfer tube bundles, and some of the heat transfer tube bundles are connected to the medium-temperature heat source A, and other parts of the heat transfer tube bundles are connected to the medium-temperature heat source B, and the heat transfer tube bundles of each part of the absorber are connected in series or in parallel with the heat transfer tube bundle of the condenser.

10. The multi-heat source heat-increasing absorption heat pump according to claim 1, characterized in that: The connection mode between the medium temperature heat source and each group of the absorber heat transfer tube bundle and the condenser heat transfer tube bundle is series connection, parallel connection or series-parallel connection.

Images