CN111550947A - Novel lithium bromide absorption heat pump and heating method thereof - Google Patents
Novel lithium bromide absorption heat pump and heating method thereof Download PDFInfo
- Publication number
- CN111550947A CN111550947A CN202010573679.9A CN202010573679A CN111550947A CN 111550947 A CN111550947 A CN 111550947A CN 202010573679 A CN202010573679 A CN 202010573679A CN 111550947 A CN111550947 A CN 111550947A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- solution
- lithium bromide
- absorber
- steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to a novel lithium bromide absorption heat pump and a heating method thereof. The novel lithium bromide absorption heat pump comprises an absorber, a solution heat exchanger, a generator, a steam heat exchanger, a condenser and an evaporator. The invention divides the lithium bromide dilute solution from the absorber into two paths, and the two paths are respectively heated by the lithium bromide concentrated solution and the high-temperature steam from the generator, thereby improving the temperature of the lithium bromide dilute solution entering the generator, reducing the consumption of high-temperature heat in the generator, improving the heating efficiency of the heat pump by optimizing the structure of the single-effect lithium bromide absorption heat pump under the condition of not changing the temperature of a high-temperature driving heat source, improving the heating efficiency without adopting a multi-effect lithium bromide absorption heat pump, and reducing the complexity of the system.
Description
Technical Field
The invention relates to the technical field of heating equipment, in particular to a novel lithium bromide absorption heat pump and a heating method thereof.
Background
The first type of lithium bromide absorption heat pump can increase the temperature of low-temperature heat energy and output medium-temperature heat energy by consuming high-temperature heat energy, and is widely applied to industrial production and life. The single-effect lithium bromide absorption heat pump is composed of an absorber, a generator, a condenser, an evaporator and other equipment, and is simple in structure, and the heating efficiency can generally reach 1.6-1.8. In the actual production process, in order to further improve the heating efficiency of the heat pump, a multi-effect lithium bromide absorption heat pump is often adopted; along with the increase of the heat pump efficiency, the heating efficiency is greatly improved, but the required temperature of a high-temperature driving heat source is also improved, and the complexity of the system is greatly increased.
Disclosure of Invention
The invention aims to provide a novel lithium bromide absorption heat pump and a heating method thereof, and aims to solve the problems that the system complexity is high in the mode of improving the heating efficiency by adopting a multi-effect lithium bromide absorption heat pump at present, and the temperature required by a high-temperature driving heat source is high.
In order to achieve the purpose, the invention provides the following scheme:
a novel lithium bromide absorption heat pump comprising: the system comprises an absorber, a solution heat exchanger, a generator, a steam heat exchanger, a condenser and an evaporator;
a first outlet end of the absorber is respectively connected with a first inlet end of the solution heat exchanger and a first inlet end of the steam heat exchanger; the first outlet end of the solution heat exchanger and the first outlet end of the steam heat exchanger are respectively connected with the first inlet end of the generator; the first outlet end of the generator is connected with the second inlet end of the steam heat exchanger; the second outlet end of the steam heat exchanger is connected with the first inlet end of the condenser; the first outlet end of the condenser is connected with the inlet end of the evaporator; the outlet end of the evaporator is connected with the first inlet end of the absorber; the second outlet end of the generator is connected with the second inlet end of the solution heat exchanger; and the second outlet end of the solution heat exchanger is connected with the second inlet end of the absorber.
Optionally, a third inlet end of the absorber is used for introducing a low temperature stream; the third outlet end of the absorber is connected with the second inlet end of the condenser; the second outlet end of the condenser is used for outputting a medium-temperature material flow.
Optionally, a first throttle valve is further disposed between the second output end of the solution heat exchanger and the second input end of the absorber; the input end of the first throttling valve is connected with the second output end of the solution heat exchanger; the output end of the first throttle valve is connected with the second input end of the absorber.
Optionally, a solution pump is further disposed between the first output end of the absorber and the first input end of the solution heat exchanger and the first input end of the steam heat exchanger; the input end of the solution pump is connected with the first output end of the absorber; the output end of the solution pump is respectively connected with the first input end of the solution heat exchanger and the first input end of the steam heat exchanger.
Optionally, a second throttle valve is further disposed between the first output end of the condenser and the input end of the evaporator; the input end of the second throttle valve is connected with the first output end of the condenser; and the output end of the second throttle valve is connected with the input end of the evaporator.
A heating method of a novel lithium bromide absorption heat pump comprises the following steps: the system comprises an absorber, a solution heat exchanger, a generator, a steam heat exchanger, a condenser and an evaporator; a first outlet end of the absorber is respectively connected with a first inlet end of the solution heat exchanger and a first inlet end of the steam heat exchanger; the first outlet end of the solution heat exchanger and the first outlet end of the steam heat exchanger are respectively connected with the first inlet end of the generator; the first outlet end of the generator is connected with the second inlet end of the steam heat exchanger; the second outlet end of the steam heat exchanger is connected with the first inlet end of the condenser; the first outlet end of the condenser is connected with the inlet end of the evaporator; the outlet end of the evaporator is connected with the first inlet end of the absorber; the second outlet end of the generator is connected with the second inlet end of the solution heat exchanger; the second outlet end of the solution heat exchanger is connected with the second inlet end of the absorber; the heating method comprises the following steps:
the lithium bromide concentrated solution flowing out of the second outlet end of the generator flows into the solution heat exchanger through the second inlet end of the solution heat exchanger;
the lithium bromide concentrated solution which flows out of the second outlet end of the solution heat exchanger after heat exchange is finished flows into the absorber through the second inlet end of the absorber;
the lithium bromide dilute solution flowing out of the first outlet end of the absorber is divided into two paths, namely a first path of lithium bromide dilute solution and a second path of lithium bromide dilute solution;
the first path of lithium bromide dilute solution flows into the solution heat exchanger through a first inlet end of the solution heat exchanger; after the first path of lithium bromide dilute solution is heated by the lithium bromide concentrated solution in the solution heat exchanger, generating a first path of lithium bromide dilute solution after heat exchange and a lithium bromide concentrated solution after heat exchange;
the first path of lithium bromide dilute solution after heat exchange flows out of the first outlet end of the solution heat exchanger and enters the generator through the first inlet end of the generator;
the second path of lithium bromide dilute solution flows into the steam heat exchanger through the first inlet end of the steam heat exchanger;
the second path of lithium bromide dilute solution after heat exchange flows out from the first outlet end of the steam heat exchanger, enters the generator through the first inlet end of the generator, and is combined with the first path of lithium bromide dilute solution after heat exchange to form the lithium bromide dilute solution after heat exchange;
heating the lithium bromide dilute solution after heat exchange by a high-temperature driving heat source of the generator to respectively generate the lithium bromide concentrated solution and high-temperature steam;
the high-temperature steam enters the steam heat exchanger through the first outlet end of the generator and the second inlet end of the steam heat exchanger in sequence;
after the second path of lithium bromide dilute solution is heated by the high-temperature steam in the steam heat exchanger, generating a second path of lithium bromide dilute solution after heat exchange and steam after heat exchange;
the steam after heat exchange enters the condenser through a second outlet end of the steam heat exchanger and a first inlet end of the condenser in sequence; condensing the steam after the heat exchange into liquid water in the condenser and releasing first heat;
the liquid water sequentially flows into the evaporator through a first outlet end of the condenser and an inlet end of the evaporator; the liquid water is heated by a low-temperature heat source of the evaporator and then is vaporized again to generate water vapor;
the water vapor enters the absorber through the outlet end of the evaporator and the first inlet end of the absorber in sequence; and the water vapor is absorbed by the lithium bromide concentrated solution in the absorber after the heat exchange is finished to generate a lithium bromide dilute solution and release second heat.
Optionally, a third inlet end of the absorber is used for introducing a low temperature stream; the third outlet end of the absorber is connected with the second inlet end of the condenser; the second outlet end of the condenser is used for outputting a medium-temperature material flow; the heating method further includes:
the low temperature stream enters the absorber through a third input port of the absorber;
the low temperature material flow absorbs the second heat in the absorber and then the temperature rises to generate a medium and low temperature material flow;
the medium-low temperature material flow sequentially passes through a third output end of the absorber and a second input end of the condenser and enters the condenser;
and after the medium-low temperature material flow absorbs the first heat in the condenser, the temperature is further increased to generate the medium-temperature material flow.
Optionally, a first throttle valve is further disposed between the second output end of the solution heat exchanger and the second input end of the absorber; the input end of the first throttling valve is connected with the second output end of the solution heat exchanger; the output end of the first throttle valve is connected with the second input end of the absorber; the heating method further includes:
the lithium bromide concentrated solution which flows out from the second output end of the solution heat exchanger after the heat exchange is finished flows into the second input end of the absorber after throttling and pressure reduction by the first throttling valve.
Optionally, a solution pump is further disposed between the first output end of the absorber and the first input end of the solution heat exchanger and the first input end of the steam heat exchanger; the input end of the solution pump is connected with the first output end of the absorber; the output end of the solution pump is respectively connected with the first input end of the solution heat exchanger and the first input end of the steam heat exchanger; the heating method further includes:
and the lithium bromide dilute solution flowing out of the first output end of the absorber is respectively pumped into the first input end of the solution heat exchanger and the first input end of the steam heat exchanger through the solution pump.
Optionally, a second throttle valve is further disposed between the first output end of the condenser and the input end of the evaporator; the input end of the second throttle valve is connected with the first output end of the condenser; the output end of the second throttle valve is connected with the input end of the evaporator; the heating method further includes:
and the liquid water flowing out of the first output end of the condenser flows into the input end of the evaporator after being throttled and depressurized by the second throttle valve.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a novel lithium bromide absorption heat pump and a heating method thereof. The lithium bromide dilute solution from the absorber is divided into two paths, the first path enters a solution heat exchanger to exchange heat with the lithium bromide concentrated solution, the second path enters a steam heat exchanger to exchange heat with high-temperature steam, and the two paths of lithium bromide dilute solution after heat exchange generated after heat exchange are combined together and enter a generator; the pipeline at the upper part of the generator is sequentially connected with the steam heat exchanger, the condenser and the evaporator and is finally connected to the absorber; the bottom pipeline of the generator is also connected with the absorber through the solution heat exchanger. After the structure of the novel lithium bromide absorption heat pump is adopted, the lithium bromide dilute solution from the absorber is divided into two paths, and the two paths are respectively heated by the lithium bromide concentrated solution and high-temperature steam from the generator, so that the temperature of the lithium bromide dilute solution entering the generator is increased, and the consumption of high-temperature heat in the generator is reduced, therefore, under the condition of not changing the temperature of a high-temperature driving heat source, the heating efficiency of a heat pump is improved by optimizing the structure of a single-effect lithium bromide absorption heat pump, the heating efficiency is improved without adopting a multi-effect lithium bromide absorption heat pump, and the complexity of the system is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural view of a novel lithium bromide absorption heat pump provided by the present invention;
description of the symbols: the system comprises an absorber 1, a solution heat exchanger 2, a generator 3, a steam heat exchanger 4, a condenser 5, an evaporator 6, a first throttling valve 7, a solution pump 8 and a second throttling valve 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a novel lithium bromide absorption heat pump, which aims to solve the problems that the heating efficiency is improved by adopting a multi-effect lithium bromide absorption heat pump at present, the system complexity is high, and the temperature required by a high-temperature driving heat source is high.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic view of a structure of a novel lithium bromide absorption heat pump and a heating method thereof provided by the invention. As shown in fig. 1, the novel lithium bromide absorption heat pump of the present invention comprises: absorber 1, solution heat exchanger 2, generator 3, vapour heat exchanger 4, condenser 5, evaporator 6, first throttle valve 7, solution pump 8 and second throttle valve 9. The connection relationship is as follows: the absorber 1 is sequentially connected with the solution heat exchanger 2, the generator 3, the steam heat exchanger 4, the condenser 5 and the evaporator 6 end to form a loop. The absorber 1 is respectively connected with the solution heat exchanger 2 and the steam heat exchanger 4, the solution heat exchanger 2 is connected with the generator 3, the generator 3 is connected with the steam heat exchanger 4, the steam heat exchanger 4 is connected with the condenser 5, the condenser 5 is connected with the evaporator 6, and the evaporator 6 is connected with the absorber 1. The flow relationship of the working medium is as follows: the lithium bromide concentrated solution from the generator 3 enters the absorber 1 through the solution heat exchanger 2; the lithium bromide dilute solution from the absorber 1 is divided into two paths, one path enters the generator 3 through the solution heat exchanger 2, and the other path enters the generator 3 through the steam heat exchanger 4, namely for the lithium bromide dilute solution from the absorber 1 through the solution pump 8, the solution heat exchanger 2 and the steam heat exchanger 4 are in parallel connection; high-temperature steam generated in the generator 3 sequentially passes through the steam heat exchanger 4, the condenser 5 and the evaporator 6 to enter the absorber 1, so that a lithium bromide solution and the steam form a loop; on the other hand, the low-temperature material flow passes through the absorber 1 and the condenser 5 in sequence and then outputs the medium-temperature material flow.
Specifically, a first outlet end of the absorber 1 is connected to a first inlet end of the solution heat exchanger 2 and a first inlet end of the vapor heat exchanger 4 respectively; a first outlet end of the solution heat exchanger 2 and a first outlet end of the steam heat exchanger 4 are respectively connected with a first inlet end of the generator 3; a first outlet end of the generator 3 is connected with a second inlet end of the steam heat exchanger 4; the second outlet end of the steam heat exchanger 4 is connected with the first inlet end of the condenser 5; a first outlet end of the condenser 5 is connected with an inlet end of the evaporator 6; the outlet end of the evaporator 6 is connected with the first inlet end of the absorber 1; a second outlet end of the generator 3 is connected with a second inlet end of the solution heat exchanger 2; and the second outlet end of the solution heat exchanger 2 is connected with the second inlet end of the absorber 1.
The third inlet end of the absorber 1 is used for introducing a low-temperature material flow; the third outlet end of the absorber 1 is connected with the second inlet end of the condenser 5; the second outlet end of the condenser 5 is used for outputting a medium temperature material flow.
Further, a first throttle valve 7 is arranged between the second output end of the solution heat exchanger 2 and the second input end of the absorber 1; the input end of the first throttle valve 7 is connected with the second output end of the solution heat exchanger 2; the output of the first throttle valve 7 is connected to a second input of the absorber 1.
A solution pump 8 is arranged between the first output end of the absorber 1 and the first input end of the solution heat exchanger 2 and between the first output end of the steam heat exchanger 4; the input end of the solution pump 8 is connected with the first output end of the absorber 1; the output end of the solution pump 8 is connected to the first input end of the solution heat exchanger 2 and the first input end of the steam heat exchanger 4 respectively.
A second throttle valve 9 is further arranged between the first output end of the condenser 5 and the input end of the evaporator 6; the input end of the second throttle valve 9 is connected with the first output end of the condenser 5; the output end of the second throttle valve 9 is connected with the input end of the evaporator 6.
As shown in fig. 1, the operation process of the novel lithium bromide absorption heat pump of the present invention is: the lithium bromide dilute solution generated in the absorber 1 is pressurized by a solution pump 8 and then divided into two paths, the first path is heated by the lithium bromide concentrated solution from the generator 3 through a solution heat exchanger 2, and the second path enters a steam heat exchanger 4 and is heated by high-temperature steam generated in the generator 3; the two heated lithium bromide dilute solutions are combined into one path and enter a generator 3, and the combined solution is further heated by a high-temperature driving heat source to generate high-temperature steam which is changed into a high-concentration lithium bromide solution (namely a lithium bromide concentrated solution); the temperature of high-temperature steam is reduced after flowing through the steam heat exchanger 4, then the high-temperature steam is further reduced and condensed into liquid water at the temperature of the condenser 5 and releases heat, the liquid water is throttled and reduced by the second throttle valve 9 and absorbs the temperature from a low-temperature heat source for revaporization, and finally the liquid water enters the absorber 1 and is absorbed by the high-concentration lithium bromide solution after heat exchange is completed to generate a low-concentration lithium bromide solution (namely a lithium bromide dilute solution) and release heat at the same time; the low-temperature material flow passes through the absorber 1 and the condenser 5 in sequence to absorb heat, and then the temperature rises to generate a medium-temperature material flow.
According to the invention, a steam heat exchanger 4 is additionally arranged between the absorber 1 and the generator 3, and the steam heat exchanger 4 is respectively connected with the absorber 1, the generator 3 and the condenser 5. The steam heat exchanger 4 heats part of the lithium bromide dilute solution from the absorber 1 by using high-temperature steam generated in the generator 3; the steam after heat exchange enters a condenser 5, the lithium bromide dilute solution after heat exchange enters a generator 3, under the condition that the temperature of a high-temperature driving heat source is not changed, the structure of the single-effect lithium bromide absorption heat pump is optimized, the high-temperature heat in the heat pump system is fully utilized, the quality reduction is reduced, the consumption of the high-temperature heat and the output of medium-temperature heat are synchronously and equivalently reduced, and the purpose of improving the heating efficiency of the lithium bromide absorption heat pump can be achieved.
Based on the novel lithium bromide absorption heat pump, the invention also provides a heating method of the novel lithium bromide absorption heat pump, and the heating method comprises the following steps:
the lithium bromide concentrated solution flowing out of the second outlet end of the generator 3 flows into the solution heat exchanger 2 through the second inlet end of the solution heat exchanger 2;
the lithium bromide concentrated solution which flows out from the second outlet end of the solution heat exchanger 2 after heat exchange is finished flows into the absorber 1 through the second inlet end of the absorber 1;
the lithium bromide dilute solution flowing out of the first outlet end of the absorber 1 is divided into two paths, namely a first path of lithium bromide dilute solution and a second path of lithium bromide dilute solution;
the first path of lithium bromide dilute solution flows into the solution heat exchanger 2 through the first inlet end of the solution heat exchanger 2; after the first path of lithium bromide dilute solution is heated by the lithium bromide concentrated solution in the solution heat exchanger 2, a first path of lithium bromide dilute solution after heat exchange and a lithium bromide concentrated solution after heat exchange are generated;
the first path of lithium bromide dilute solution after heat exchange flows out from the first outlet end of the solution heat exchanger 2 and enters the generator 3 through the first inlet end of the generator 3;
the second path of lithium bromide dilute solution flows into the steam heat exchanger 4 through the first inlet end of the steam heat exchanger 4;
the second path of lithium bromide dilute solution after heat exchange flows out from the first outlet end of the steam heat exchanger 4, enters the generator 3 through the first inlet end of the generator 3, and is combined with the first path of lithium bromide dilute solution after heat exchange to form the lithium bromide dilute solution after heat exchange;
the lithium bromide dilute solution after heat exchange is heated by a high-temperature driving heat source of the generator 3, and then the lithium bromide concentrated solution and high-temperature steam are respectively generated;
the high-temperature steam enters the steam heat exchanger 4 through the first outlet end of the generator 3 and the second inlet end of the steam heat exchanger 4 in sequence;
after the second path of lithium bromide dilute solution is heated by the high-temperature steam in the steam heat exchanger 4, generating a second path of lithium bromide dilute solution after heat exchange and steam after heat exchange;
the steam after heat exchange enters the condenser 5 through a second outlet end of the steam heat exchanger 4 and a first inlet end of the condenser 5 in sequence; the steam after the heat exchange is finished is condensed into liquid water in the condenser 5 and releases first heat;
the liquid water flows into the evaporator 6 through the first outlet end of the condenser 5 and the inlet end of the evaporator 6 in sequence; the liquid water is heated by the low-temperature heat source of the evaporator 6 and then is vaporized again to generate water vapor;
the water vapor enters the absorber 1 through the outlet end of the evaporator 6 and the first inlet end of the absorber 1 in sequence; and the water vapor is absorbed by the lithium bromide concentrated solution after the heat exchange in the absorber 1 to generate a lithium bromide dilute solution and release second heat.
The invention adds a steam heat exchanger 4 on the basis of the existing lithium bromide absorption heat pump, and the high-temperature steam generated by the generator 3 can be utilized to heat the lithium bromide dilute solution through the steam heat exchanger 4, thereby reducing the consumption of high-temperature heat and improving the heating efficiency of the lithium bromide absorption heat pump.
Further, the heating method further includes:
the low temperature stream enters the absorber 1 through a third input port of the absorber 1;
the low temperature material flow absorbs the second heat in the absorber 1, and then the temperature rises to generate a medium and low temperature material flow;
the medium-low temperature material flow sequentially passes through a third output end of the absorber 1 and a second input end of the condenser 5 and enters the condenser 5;
the medium-low temperature material flow absorbs the first heat in the condenser 5, and then the temperature is further increased to generate the medium-temperature material flow.
The heating method further includes:
the lithium bromide concentrated solution after the heat exchange is finished and flows out from the second output end of the solution heat exchanger 2, and flows into the second input end of the absorber 1 after the throttling and pressure reduction of the first throttling valve 7.
The dilute lithium bromide solution flowing out of the first output end of the absorber 1 is pumped into the first input end of the solution heat exchanger 2 and the first input end of the steam heat exchanger 4 through the solution pump 8.
The liquid water flowing out of the first output end of the condenser 5 is throttled and depressurized by the second throttle valve 9 and then flows into the input end of the evaporator 6.
The existing lithium bromide absorption heat pump usually uses the high-temperature steam generated in the generator to heat the low-temperature material flow, but the constant pressure and temperature reduction of the superheated steam is carried out until the heat release quantity of the dry saturated steam is very small relative to the vaporization latent heat quantity of the steam, so that the temperature of the low-temperature material flow cannot be effectively improved, and the quality of the high-temperature heat is lost. The invention utilizes the high-temperature steam generated by the generator 3 to heat the low-concentration lithium bromide solution by adding the steam heat exchanger 4, thereby reducing the quality loss of the high-temperature steam and reducing the high-temperature heat consumption, thereby improving the heating efficiency of the lithium bromide absorption heat pump.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A novel lithium bromide absorption heat pump, comprising: the system comprises an absorber, a solution heat exchanger, a generator, a steam heat exchanger, a condenser and an evaporator;
a first outlet end of the absorber is respectively connected with a first inlet end of the solution heat exchanger and a first inlet end of the steam heat exchanger; the first outlet end of the solution heat exchanger and the first outlet end of the steam heat exchanger are respectively connected with the first inlet end of the generator; the first outlet end of the generator is connected with the second inlet end of the steam heat exchanger; the second outlet end of the steam heat exchanger is connected with the first inlet end of the condenser; the first outlet end of the condenser is connected with the inlet end of the evaporator; the outlet end of the evaporator is connected with the first inlet end of the absorber; the second outlet end of the generator is connected with the second inlet end of the solution heat exchanger; and the second outlet end of the solution heat exchanger is connected with the second inlet end of the absorber.
2. The novel lithium bromide absorption heat pump according to claim 1, wherein the third inlet port of the absorber is configured to introduce a low temperature stream; the third outlet end of the absorber is connected with the second inlet end of the condenser; the second outlet end of the condenser is used for outputting a medium-temperature material flow.
3. The novel lithium bromide absorption heat pump according to claim 1, wherein a first throttle valve is further provided between the second output of the solution heat exchanger and the second input of the absorber; the input end of the first throttling valve is connected with the second output end of the solution heat exchanger; the output end of the first throttle valve is connected with the second input end of the absorber.
4. The novel lithium bromide absorption heat pump according to claim 1, wherein a solution pump is further provided between the first output of the absorber and the first input of the solution heat exchanger and the first input of the steam heat exchanger; the input end of the solution pump is connected with the first output end of the absorber; the output end of the solution pump is respectively connected with the first input end of the solution heat exchanger and the first input end of the steam heat exchanger.
5. The novel lithium bromide absorption heat pump according to claim 1, wherein a second throttle valve is further provided between the first output of the condenser and the input of the evaporator; the input end of the second throttle valve is connected with the first output end of the condenser; and the output end of the second throttle valve is connected with the input end of the evaporator.
6. A heating method of a novel lithium bromide absorption heat pump is characterized in that the novel lithium bromide absorption heat pump comprises the following steps: the system comprises an absorber, a solution heat exchanger, a generator, a steam heat exchanger, a condenser and an evaporator; a first outlet end of the absorber is respectively connected with a first inlet end of the solution heat exchanger and a first inlet end of the steam heat exchanger; the first outlet end of the solution heat exchanger and the first outlet end of the steam heat exchanger are respectively connected with the first inlet end of the generator; the first outlet end of the generator is connected with the second inlet end of the steam heat exchanger; the second outlet end of the steam heat exchanger is connected with the first inlet end of the condenser; the first outlet end of the condenser is connected with the inlet end of the evaporator; the outlet end of the evaporator is connected with the first inlet end of the absorber; the second outlet end of the generator is connected with the second inlet end of the solution heat exchanger; the second outlet end of the solution heat exchanger is connected with the second inlet end of the absorber; the heating method comprises the following steps:
the lithium bromide concentrated solution flowing out of the second outlet end of the generator flows into the solution heat exchanger through the second inlet end of the solution heat exchanger;
the lithium bromide concentrated solution which flows out of the second outlet end of the solution heat exchanger after heat exchange is finished flows into the absorber through the second inlet end of the absorber;
the lithium bromide dilute solution flowing out of the first outlet end of the absorber is divided into two paths, namely a first path of lithium bromide dilute solution and a second path of lithium bromide dilute solution;
the first path of lithium bromide dilute solution flows into the solution heat exchanger through a first inlet end of the solution heat exchanger; after the first path of lithium bromide dilute solution is heated by the lithium bromide concentrated solution in the solution heat exchanger, generating a first path of lithium bromide dilute solution after heat exchange and a lithium bromide concentrated solution after heat exchange;
the first path of lithium bromide dilute solution after heat exchange flows out of the first outlet end of the solution heat exchanger and enters the generator through the first inlet end of the generator;
the second path of lithium bromide dilute solution flows into the steam heat exchanger through the first inlet end of the steam heat exchanger;
the second path of lithium bromide dilute solution after heat exchange flows out from the first outlet end of the steam heat exchanger, enters the generator through the first inlet end of the generator, and is combined with the first path of lithium bromide dilute solution after heat exchange to form the lithium bromide dilute solution after heat exchange;
heating the lithium bromide dilute solution after heat exchange by a high-temperature driving heat source of the generator to respectively generate the lithium bromide concentrated solution and high-temperature steam;
the high-temperature steam enters the steam heat exchanger through the first outlet end of the generator and the second inlet end of the steam heat exchanger in sequence;
after the second path of lithium bromide dilute solution is heated by the high-temperature steam in the steam heat exchanger, generating a second path of lithium bromide dilute solution after heat exchange and steam after heat exchange;
the steam after heat exchange enters the condenser through a second outlet end of the steam heat exchanger and a first inlet end of the condenser in sequence; condensing the steam after the heat exchange into liquid water in the condenser and releasing first heat;
the liquid water sequentially flows into the evaporator through a first outlet end of the condenser and an inlet end of the evaporator; the liquid water is heated by a low-temperature heat source of the evaporator and then is vaporized again to generate water vapor;
the water vapor enters the absorber through the outlet end of the evaporator and the first inlet end of the absorber in sequence; and the water vapor is absorbed by the lithium bromide concentrated solution in the absorber after the heat exchange is finished to generate a lithium bromide dilute solution and release second heat.
7. The method of heating in a novel lithium bromide absorption heat pump according to claim 6, wherein the third inlet port of the absorber is used for introducing a low temperature stream; the third outlet end of the absorber is connected with the second inlet end of the condenser; the second outlet end of the condenser is used for outputting a medium-temperature material flow; the heating method further includes:
the low temperature stream enters the absorber through a third input port of the absorber;
the low temperature material flow absorbs the second heat in the absorber and then the temperature rises to generate a medium and low temperature material flow;
the medium-low temperature material flow sequentially passes through a third output end of the absorber and a second input end of the condenser and enters the condenser;
and after the medium-low temperature material flow absorbs the first heat in the condenser, the temperature is further increased to generate the medium-temperature material flow.
8. The method of claim 6, wherein a first throttle valve is further provided between the second output of the solution heat exchanger and the second input of the absorber; the input end of the first throttling valve is connected with the second output end of the solution heat exchanger; the output end of the first throttle valve is connected with the second input end of the absorber; the heating method further includes:
the lithium bromide concentrated solution which flows out from the second output end of the solution heat exchanger after the heat exchange is finished flows into the second input end of the absorber after throttling and pressure reduction by the first throttling valve.
9. The method of claim 6, wherein a solution pump is further provided between the first output of the absorber and the first input of the solution heat exchanger and the first input of the steam heat exchanger; the input end of the solution pump is connected with the first output end of the absorber; the output end of the solution pump is respectively connected with the first input end of the solution heat exchanger and the first input end of the steam heat exchanger; the heating method further includes:
and the lithium bromide dilute solution flowing out of the first output end of the absorber is respectively pumped into the first input end of the solution heat exchanger and the first input end of the steam heat exchanger through the solution pump.
10. The heating method of a novel lithium bromide absorption heat pump according to claim 6, wherein a second throttle valve is further provided between the first output end of the condenser and the input end of the evaporator; the input end of the second throttle valve is connected with the first output end of the condenser; the output end of the second throttle valve is connected with the input end of the evaporator; the heating method further includes:
and the liquid water flowing out of the first output end of the condenser flows into the input end of the evaporator after being throttled and depressurized by the second throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010573679.9A CN111550947A (en) | 2020-06-22 | 2020-06-22 | Novel lithium bromide absorption heat pump and heating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010573679.9A CN111550947A (en) | 2020-06-22 | 2020-06-22 | Novel lithium bromide absorption heat pump and heating method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111550947A true CN111550947A (en) | 2020-08-18 |
Family
ID=71997988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010573679.9A Pending CN111550947A (en) | 2020-06-22 | 2020-06-22 | Novel lithium bromide absorption heat pump and heating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111550947A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234312A (en) * | 2021-12-17 | 2022-03-25 | 李鹏逻 | Energy storage method of compression-type and absorption-type integrated air conditioner and energy storage air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147618A (en) * | 1995-10-09 | 1997-04-16 | 山东工业大学 | New process of double-effect bromination absorption type refrigerator |
| JPH1163716A (en) * | 1997-08-12 | 1999-03-05 | Tokyo Gas Co Ltd | Absorption cold and hot water machine |
| JPH11182966A (en) * | 1997-12-19 | 1999-07-06 | Tokyo Gas Co Ltd | Absorption hot and chilled water generator |
| CN1563857A (en) * | 2004-03-24 | 2005-01-12 | 上海理工大学 | Double-temp-raising produced overcooling absorption and single effect, afterheat absorbing refrgerating system |
| CN202119157U (en) * | 2011-06-25 | 2012-01-18 | 双良节能系统股份有限公司 | Steam type lithium bromide absorption type heat pump capable of efficiently utilizing working steam water condensation heat |
-
2020
- 2020-06-22 CN CN202010573679.9A patent/CN111550947A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147618A (en) * | 1995-10-09 | 1997-04-16 | 山东工业大学 | New process of double-effect bromination absorption type refrigerator |
| JPH1163716A (en) * | 1997-08-12 | 1999-03-05 | Tokyo Gas Co Ltd | Absorption cold and hot water machine |
| JPH11182966A (en) * | 1997-12-19 | 1999-07-06 | Tokyo Gas Co Ltd | Absorption hot and chilled water generator |
| CN1563857A (en) * | 2004-03-24 | 2005-01-12 | 上海理工大学 | Double-temp-raising produced overcooling absorption and single effect, afterheat absorbing refrgerating system |
| CN202119157U (en) * | 2011-06-25 | 2012-01-18 | 双良节能系统股份有限公司 | Steam type lithium bromide absorption type heat pump capable of efficiently utilizing working steam water condensation heat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234312A (en) * | 2021-12-17 | 2022-03-25 | 李鹏逻 | Energy storage method of compression-type and absorption-type integrated air conditioner and energy storage air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104154674A (en) | Second-class absorption heat pump system and heating method thereof | |
| CN102419026B (en) | Absorption-type heat source temperature changer | |
| US8935931B2 (en) | Method of adding adjacent high-temperature heating-side for absorption heat | |
| CN102797524B (en) | Medium-and-low-temperature waste-heat utilization cooling/power combination system | |
| CN108050571A (en) | Single-stage balanced type ammonia-water reabsorbs formula heat pump cycle equipment and heat supply method | |
| CN110593973A (en) | System for improving power generation capacity through organic Rankine cycle combined with flash evaporation and control method | |
| CN113432333B (en) | Two-stage type first lithium bromide absorption heat pump unit with variable efficiency | |
| CN101240953A (en) | Ammonia compression -absorption composite heat pump circulating device and circulate method | |
| CN111550947A (en) | Novel lithium bromide absorption heat pump and heating method thereof | |
| CN107328132B (en) | Second-class absorption heat pump | |
| CN212409131U (en) | Temperature-rising absorption type large-temperature-difference heat exchange unit | |
| JP2006177570A (en) | Absorption heat pump | |
| CN100570241C (en) | The double-effect lithium bromide absorption type refrigerating plant that fume afterheat utilizes | |
| CN202073655U (en) | Integrated distributed energy system | |
| CN207585143U (en) | A kind of first-class absorption type heat pump of solar energy auxiliary heating | |
| CN205783969U (en) | A kind of absorption system based on membrane permeation isolation technics | |
| CN104180555A (en) | Cool double-effect lithium bromide spray absorption type refrigeration cycle system | |
| CN211287812U (en) | System for organic Rankine cycle of combination flash distillation improves power generation ability | |
| CN208090780U (en) | A kind of lithium bromide absorption type heat pump gain of heat type unit | |
| CN210602325U (en) | Low-temperature heat source cascade utilization type lithium bromide absorption heat pump unit | |
| CN107328135A (en) | Double evaporating pressure ammonia concn adjustable type power/refrigeration combined cycle power plants | |
| CN207585132U (en) | One kind is pumped based on the first kind absorption type heat of mixing | |
| CN111692775B (en) | Lithium bromide absorption heat pump | |
| CN106352590B (en) | Combined heat and power system | |
| CN216244979U (en) | Novel absorption heat pump for increasing heat supply temperature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |