Operating method of absorption-diffusion cooling unit

FIELD: heating systems.

SUBSTANCE: invention refers to household appliances and can be used in absorption-diffusion cooling units. Operating method of absorption-diffusion cooling units consists in supplying lean solution from generator to absorber. Lean solution is supplied to absorber through distributor wherein the lean solution flowing down throughout the inner surface of distributor owing to wetting effect and gravitation forces flows around spreaders installed on inner surface of distributor, which leads to splitting of initial flow of lean solution into several individual flows. Flow characteristics of individual flows are proportional to the distributor inner surface area wetted by them. Individual flows are supplied to absorber which provides absorption process for each individual flow irrespective of the rest flows.

EFFECT: reducing daily energy consumption.

2 cl, 4 dwg

 

The invention relates to household appliances and can be used in absorption-diffusion refrigeration units (ADHA).

The known method of operation ADHA (RF patent No. 2031328, IPC F25B 15/10, 1992) by evaporation in the boiler of the refrigerant from the strong solution, the condensation of the refrigerant vapor in the condenser, evaporation of liquid refrigerant in the inert gas in the evaporator and the subsequent transportation of the cold gas mixture (ASG) in the absorber.

The disadvantage of this method is its low thermodynamic efficiency due to low intensity of heat and mass exchange processes in the absorber.

A method of obtaining cold in ADHA - prototype (patent RF №2205335, IPC F25B 15/10, 2001). How is that a strong solution through proletnogo pump is fed into the separator. Parity pump works by using a pair of refrigerant supplied from the boiler (generator), using additional proletnogo pump by means of vapor from the boiler and is included in the line of vapor between the separator and the condenser, the solution from the absorber serves in an additional separator. The solution of the additional separator is sent to an additional absorber.

The disadvantage of the prototype is a high daily consumption, due to the low efficiency of the absorption process, what is the consequence of insufficient contact area of the weak solution and the calibration gas in the absorber.

The objective of the invention is to reduce the daily energy consumption by obtaining in the process of absorption of a strong solution of the maximum concentration by increasing the contact area between the weak solution and the calibration gas in the absorber.

This object is achieved due to the fact that in the method of operation of an absorption-diffusion refrigeration unit, which consists in applying a weak solution from the generator to the absorber according to the invention a weak solution fed into the absorber through the dispenser, in which a weak solution flowing down the entire inner surface of the distributor due to the effect of wettability and gravity flows installed on the inner surface of the distributor dividers, which leads to the splitting of the original stream of weak solution into separate streams, flow characteristic which is proportional to the wetted them part of the square of the inner surface of the distributor.

Separate streams fed into the absorber, providing the absorption process for each stream independently from other threads.

The proposed method is implemented in ADHA shown in the drawing.

Figure 1 shows the General layout of the ADHA.

Figure 2 shows the distributor (the main view).

Figure 3 shows the dispenser (cross-section B-B).

Figure 4. shows the dispenser (cut-In).

Figure 2-4 shows a variant of the distributor which divides the flow of weak solution for three more small stream.

The dispenser consists of a body 1 and dividers 2, 3, installed on the inner surface of the distributor and connected to each other. Mutual arrangement of the dividers 2, 3 defined by a predetermined function of the distributor on the splitting of the original low-flow stream of weak solution for smaller streams with the necessary consumption characteristics, which are determined by the ratio of the areas of the inner surface of the distributor's share dividers.

The body 1 of the dispenser is installed with an incline, ensure runoff weak solution, and made with butt plugged, which is also tightly connected with dividers 2, 3.

The liquid part of the cavities formed by the end of the body 1 of the dispenser and dividers 2, 3, are connected through output tubes 4, 5, 6 valves with absorber 7.

ADHA (figure 1) contains the generator 8 and the heat exchanger 9 type "pipe in pipe".

Work ADHA is as follows.

Unit dressed circulating substances according to known proportions and parameters.

Weak process is, obtained in the generator 8, after evaporation of the strong solution through the heat exchanger 9 flows into the housing 1 of the distributor, where due to the effect of wettability spreads around the perimeter of the inner surface of the housing 1 and flows through it under the influence of gravitational forces.

After wrapping dividers 2, 3 of the original stream of weak solution of the heat exchanger 9 is divided into three smaller stream, each of which is accumulated in the respective liquid parts of the cavities formed by the end of the body 1 of the dispenser and dividers 2, 3. Through the output tubes 4, 5, 6 flows into the absorber 7, the design of which allows the absorption process for each of the individual threads independently from the other parts of the original stream of weak solution. The result in this case is three-fold increase in the contact area between the weak solution and CBC compared with the absorber in a similar design and the same height in the refrigeration unit is not equipped with distributors weak solution.

A significant increase in the contact area between the weak solution and CBC allows the absorption process to obtain a strong solution of the maximum concentration at the same height of the absorber.

Using this technique will help to reduce the daily energy consumption of absorption and x is Mogilnikov by increasing the cooling capacity ADHA by increasing the efficiency of the absorber unit, allowing to obtain a strong solution of the maximum concentration.

1. The way of absorption and diffusion refrigeration unit, which consists in applying a weak solution from the generator to the absorber, characterized in that a weak solution fed into the absorber through the dispenser, in which a weak solution flowing down the entire inner surface of the distributor due to the effect of wettability and gravity flows installed on the inner surface of the distributor dividers, which leads to the splitting of the original stream of weak solution into separate streams, flow characteristic which is proportional to the wetted them part of the square of the inner surface of the distributor.

2. The way of absorption and diffusion refrigeration unit according to claim 1, characterized in that the separate streams fed into the absorber, providing the absorption process for each stream independently from other threads.



 

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FIELD: domestic refrigerating equipment.

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FIELD: refrigeration equipment, particularly absorption-diffusion refrigerating machines used in domestic refrigerators.

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EFFECT: increased efficiency of absorption-diffusion refrigerating machine.

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EFFECT: increased completeness of ammonia vapor absorption from vapor-and-gas mixture and, as a result increased efficiency of absorber operation.

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FIELD: domestic appliance.

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EFFECT: enhanced efficiency.

3 cl, 1 dwg

FIELD: refrigeration engineering.

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EFFECT: enhanced efficiency.

FIELD: domestic refrigerating equipment.

SUBSTANCE: method is realized due to supplying liquid cooling agent to separator and further to additional evaporator. Cooling agent is supplied from lower part of evaporator by means of vapor-lifting pump. The last works with use of vapor of liquid cooling agent generated during heat exchange process between thermally loaded portions of refrigerating aggregate and liquid cooling agent from cavity of lower part of additional evaporator. Liquid cooling agent from cavity in lower part of additional evaporator by means of additional vapor-lifting pump operating with use of vapor of cooling agent from separator and mounted in communication line by liquid cooling agent vapor between separator and condenser is fed to additional separator. Liquid cooling agent is fed to additional separator and then through hydraulic seal it is directed to next additional evaporator. Liquid cooling agent is fed to additional separator till level no less than that of adding liquid cooling agent to next additional evaporator. Evaporator, additional evaporator and next additional evaporator are mutually coupled by vapor. Evaporator and additional evaporator are mounted in liquid cooling agent communication line between condenser and next additional evaporator.

EFFECT: lowered size of evaporator of absorption-diffusion refrigerating aggregate.

3 cl, 1 dwg

FIELD: refrigeration engineering.

SUBSTANCE: refrigerator comprises generator, absorber provided with the connecting pipes for supplying and discharging solution, condenser, evaporator steam-lifting pump for lifting strong solution to the separator actuated by means of coolant supplied from the generator, pipe for steam-gas mixture, and steam duct with hydraulic valve gate. The refrigerator has additional steam-lifting pump with lifting pipe, additional separator, and additional steam duct with hydraulic valve gate. The absorber is provided with the additional tank. The steam space of the separator is connected with the lifting pipe of the additional steam-lifting pump whose bottom end is connected with the tank in the bottom part of the absorber, and top end is set into the steam space of the additional separator that is connected with the lifting pipe of the downstream additional steam-lifting pump whose bottom end is connected with the additional tank in the bottom part of the absorber, and top end is set into the steam space of the downstream additional separator connected with the steam space of the condenser. The liquid spaces of the additional separator and downstream additional separator are connected with the connecting pipe for supplying solution to the absorber.

EFFECT: reduced sizes.

8 cl, 1 dwg

FIELD: heating systems.

SUBSTANCE: invention refers to household appliances and can be used in absorption-diffusion cooling units. Operating method of absorption-diffusion cooling units consists in supplying lean solution from generator to absorber. Lean solution is supplied to absorber through distributor wherein the lean solution flowing down throughout the inner surface of distributor owing to wetting effect and gravitation forces flows around spreaders installed on inner surface of distributor, which leads to splitting of initial flow of lean solution into several individual flows. Flow characteristics of individual flows are proportional to the distributor inner surface area wetted by them. Individual flows are supplied to absorber which provides absorption process for each individual flow irrespective of the rest flows.

EFFECT: reducing daily energy consumption.

2 cl, 4 dwg

FIELD: heating.

SUBSTANCE: invention refers to design of refrigerating equipment. The proposed method of absorption refrigerating apparatus operation consists in starting/tripping magnitude-constant thermal load on the generator unit of the absorption-diffusion refrigerating machine depending on the temperature. Thermal load starting/tripping is done depending on the temperature as measured at the elevation section of the absorption-diffusion refrigerating machine dephlegmator. Tripping is done at temperatures exceeding that of ammoniation. Starting is done at temperatures inferior or equal to that of ammoniation.

EFFECT: reduced energy consumption.

1 dwg

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