CN211120096U

CN211120096U - Absorption refrigeration system with double ejectors

Info

Publication number: CN211120096U
Application number: CN201922060345.7U
Authority: CN
Inventors: 臧润清; 李晓静; 董浩; 周会芳
Original assignee: Tianjin University of Commerce
Current assignee: Tianjin University of Commerce
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-07-28
Anticipated expiration: 2029-11-26

Abstract

The utility model discloses an absorption refrigeration system with two ejectors. The generator of the utility model is respectively connected with the nozzle of the first ejector and the inlet of the second condenser, the outlet of the diffusion chamber of the first ejector is connected with the first condenser, and the outlet of the first condenser is sequentially connected with the mixing chamber of the first throttle valve, the first evaporator and the first ejector through pipelines; the outlet of the second condenser is sequentially connected with a second throttling valve, a second evaporator and a diffusion chamber of a second ejector; one path between the generator and the absorber is sequentially connected with the heat exchanger and the ejector II, and the other path between the generator and the absorber is sequentially connected with the heat exchanger and the solution pump. The utility model discloses optimize and promote circulation efficiency, but also obtained the evaporating temperature of two kinds of differences, can provide two kinds of cold sources for this.

Description

Absorption refrigeration system with double ejectors

Technical Field

The utility model belongs to the technical field of absorption refrigeration cycle and specifically relates to an absorption refrigeration system with two ejectors is related to.

Background

Absorption refrigeration has been known as the earliest method of artificial refrigeration for over 200 years. Practical applications in civilian and industrial use have been for over 60 years. In more than 20 years, the absorption refrigeration has rapidly developed in the aspects of theory, application and the like, and has a considerable share in the market of the refrigerator, and under the conditions of current energy shortage, short power supply and increasingly severe environmental problems, the absorption refrigeration technology has been widely concerned and researched by manufacturers and scholars at home and abroad due to the unique advantages of the absorption refrigeration technology.

Unlike electrically driven vapor mechanical compression type refrigerating system, the absorption type refrigerating technology can utilize the heat energy of low grade heat source for direct driving, and the operation cost is far lower than that of electrically driven system. The absorption refrigeration uses natural working medium water or ammonia and the like as a refrigerant, and is harmless to the environment and the atmospheric ozone layer; meanwhile, the method has the remarkable advantages of safety, noiseless operation, high reliability and the like. However, the method also has the defects of large floor area, high initial investment, high cooling load, low system efficiency and the like, and the research of how to improve the efficiency of the absorption refrigeration system and reduce the energy consumption of the system is the key point of many scholars at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an absorption refrigeration system with two ejectors, can utilize absorption refrigeration system recycle used heat, waste heat, reduce the energy loss to prior art not enough.

An absorption refrigeration system with double ejectors comprises a generator 1, an ejector I2, a condenser I3, a throttle valve I4, an evaporator I5, a condenser II 6, a throttle valve II 7, an evaporator II 8, an absorber 9, a solution pump 10, an ejector II 11 and a heat exchanger 12, wherein the generator 1 is respectively connected with a nozzle of the ejector I2 and an inlet of the condenser II 6, an outlet of a diffusion chamber of the ejector I2 is connected with the condenser I3, and an outlet of the condenser I3 is sequentially connected with a mixing chamber of the throttle valve I4, the evaporator I5 and the ejector I2 through pipelines; the outlet of the second condenser 6 is sequentially connected with a second throttling valve 7, a second evaporator 8 and a diffusion chamber of a second ejector 11; one path between the generator 1 and the absorber 9 is sequentially connected with a heat exchanger 12 and a second ejector 11, and the other path between the generator 1 and the absorber 9 is sequentially connected with the heat exchanger 12 and a solution pump 10.

As a further preference, the working medium pair selected by the absorption refrigeration system with the double ejectors is ammonia-water solution.

The utility model discloses following technological effect has:

1. the ejector uses high-temperature and high-pressure steam at the outlet of the generator as power to eject refrigerant steam at the outlet of the evaporator, so that the condensing pressure is reduced at the cost of consuming part of steam at the outlet of the generator, and the low-temperature refrigeration temperature is obtained.

2. The ejector replaces a throttle valve, and the high-pressure dilute solution of the generator is used as power to eject the concentrated solution in the absorber, so that the absorption pressure is improved, the power consumption of the whole system is reduced, the irreversible loss is reduced, and the performance of the system is improved.

Drawings

Fig. 1 is a schematic diagram of an absorption refrigeration system with dual ejectors according to the present invention.

1-generator, 2-ejector one, 3-condenser one, 4-throttle valve one, 5-evaporator one, 6-condenser two, 7-throttle valve two, 8-evaporator two, 9-absorber, 10-solution pump, 11-ejector two, 12-heat exchanger.

Detailed Description

Referring to fig. 1, an absorption refrigeration system with dual ejectors includes a generator 1, an ejector one 2, a condenser one 3, a throttle valve one 4, an evaporator one 5, a condenser two 6, a throttle valve two 7, an evaporator two 8, an absorber 9, a solution pump 10, an ejector two 11, a heat exchanger 12, and a connection pipe. And the generator 1 is divided into two paths, one path is connected with a nozzle of the first ejector 2, and the other path is directly connected with an inlet of the second condenser 6. An outlet of a diffusion chamber of the ejector I2 is connected with a condenser I3, and an outlet of the condenser I3 is sequentially connected with a throttle valve I4, an evaporator I5 and a mixing chamber of the ejector I2 through pipelines; the outlet of the second condenser 6 is connected with a second throttling valve 7, and then is sequentially connected with a second evaporator 8 and a diffusion chamber of a second ejector 11; and a heat exchanger 12 and a second ejector 11 are connected between the generator 1 and the absorber 9 on one side, and the heat exchanger 12 and a solution pump 10 are connected on the other side.

In the absorption refrigeration system with the double ejectors, the refrigerant in the generator is heated into high-temperature and high-pressure steam, and then the steam is divided into two paths, enters the nozzle of the ejector I all the way to sequentially eject the steam of the evaporator I, then flows through the condenser to be condensed, the throttle valve I throttles and reduces the pressure of the condensed liquid into a gas-liquid two-phase fluid, and the condensed liquid is evaporated and absorbs heat to form steam; one path of the condensed liquid is directly condensed into liquid by the condenser II, enters the evaporator II after being throttled by the throttle valve II to be evaporated and absorb heat, the evaporated steam is used as working fluid after being cooled by dilute solution in the generator through the heat exchanger to be injected into the absorber to become concentrated solution, and the concentrated solution in the absorber is increased in pressure by the solution pump and then is heated by the heat exchanger again to enter the generator to be sequentially circulated.

The foregoing is merely a preferred embodiment of this patent and it will be apparent to those skilled in the art that numerous modifications and adaptations can be made without departing from the principles of the system and these are intended to be included within the scope of the invention.

Claims

1. An absorption refrigeration system with double ejectors is characterized in that a generator is respectively connected with a nozzle of a first ejector and an inlet of a second condenser, an outlet of a diffusion chamber of the first ejector is connected with the first condenser, and an outlet of the first condenser is sequentially connected with a first throttle valve, a first evaporator and a mixing chamber of the first ejector through pipelines; the outlet of the second condenser is sequentially connected with a second throttling valve, a second evaporator and a diffusion chamber of a second ejector; one path between the generator and the absorber is sequentially connected with the heat exchanger and the ejector II, and the other path between the generator and the absorber is sequentially connected with the heat exchanger and the solution pump.

2. The absorption refrigeration system according to claim 1 wherein the working substance pair of the absorption refrigeration system is an ammonia-water solution.