Hot Water Chiller for Shuangliang

Double good hot water absorption chiller

Wide range of uses

H2 series hot water two-stage lithium bromide absorption chiller

The hot water two-stage lithium bromide absorption chiller is a kind of equipment that uses hot water or organic heat carrier as the driving heat source, lithium bromide solution as the absorbent, and water as the refrigerant to prepare cold water for process or air conditioning.

Function: Produce cold water above 5℃ for central air conditioning or industrial process cooling.

Core technology to fully guarantee the unit

1. The evaporator adopts the spray method

The evaporator adopts the unique showering method to make the liquid distribution more uniform, the heat transfer area is more fully utilized, the thickness of the heat transfer tube liquid film is reduced, the heat transfer effect is enhanced, the efficiency of the unit is improved, the energy consumption of the unit is reduced, and the refrigerant pump is reduced. power.

2. The heat exchange tube of the evaporator adopts a brand-new tube type and layout

The evaporator adopts a special heat exchange tube type processed by a unique process, which is more hydrophilic and is not easy to scale. Combined with the best heat exchange tube arrangement, the liquid distribution of the entire tube bundle is more uniform and the efficiency of the unit is improved. Energy consumption.

3. Antifreeze pipe technology of evaporator

The refrigerant water of the condenser flashes directly into the evaporator water tray, and the evaporator inlet is equipped with a filter screen to eliminate the hidden dangers of the freezing pipe; multiple anti-freezing pipe safety protections such as cold water cut-off, cold water low temperature, and refrigerant water low temperature are avoided. To prevent the occurrence of frozen pipe accidents and improve the reliability of the unit.

4. New high-efficiency heat exchange tube type and structure type of the high-pressure generator.

The new type of high-efficiency heat transfer tube structure enhances the heat transfer effect, has a more compact structure, improves the efficiency of the unit, and reduces the energy consumption of the unit.

5. Inclined layout of low-voltage generators

Reduce the static liquid column, reduce the generating pressure, increase the heat transfer temperature difference, enhance the heat exchange effect, improve the efficiency of the unit, and reduce the energy consumption of the unit.

6. New high-efficiency solution exchange heat exchanger technology

The heat exchanger adopts a new and efficient heat transfer tube and a brand-new structure, which perfectly combines the velocity field and temperature field of the solution to ensure the pure countercurrent heat exchange of the two fluids, greatly reduces the heat exchange temperature difference at the end, and fully recovers the heat of the solution. Improve unit efficiency and reduce unit energy consumption.

7. The heat transfer tube adopts special surface treatment technology

The heat transfer tube adopts special surface treatment technology, which improves the wettability and area utilization rate of the solution and refrigerant water on the surface of the heat transfer tube, enhances the heat exchange effect, improves the efficiency of the unit, and reduces energy consumption.

8. Liquid inlet cooling technology for automatic air extraction device

The solution entering the automatic air extraction device is cooled by refrigerant water, which improves the effect of solution ejection and air extraction, thereby improving the performance and reliability of the unit.

9. New high-efficiency automatic air extraction system

Shuangliang’s unique high-efficiency pumping device combined with the best arrangement of internal pumping points greatly improves the pumping effect. According to the change of the self-pumping pressure, the user is automatically prompted to perform the pumping operation, and the performance and reliability of the unit are greatly improved.

10. Solution series circulation frequency conversion technology

The unit automatically adjusts the frequency of the solution pump according to the operating state to ensure that the solution circulation is always in the best state, making the control more sensitive, the adjustment range more refined, improving the stability and efficiency of the unit, and saving the power consumption of the solution pump.

Working principle

The lithium bromide aqueous solution is only an absorbent, and the water in it is the real refrigerator, which uses the boiling point of water to vaporize under high vacuum to absorb heat to achieve the purpose of refrigeration.

The first is that the vacuum pump pumps the unit to a high vacuum state, creating the necessary conditions for the boiling of water at low temperatures. In addition, because the lithium bromide aqueous solution has a pressure lower than the boiling point of the refrigerant water, there is a pressure difference between the two, so the latter has the ability to absorb water vapor, thus providing the possibility of continuous boiling of the refrigerant water.

The two-stage hot water unit consists of two generators, condensers, evaporators and absorbers, which are basically separated and connected to a certain degree with two independent refrigerant and absorbent working cycle systems. The hot water, cold water and cooling water are connected in series between the two circulation systems, and the hot water and the cooling water run in opposite directions, and the strokes exchange heat with each other in countercurrent.

The solution pump sends the dilute solution in the absorber through the heat exchanger to the generator, where it is heated and concentrated by hot water into a concentrated solution, and at the same time, refrigerant vapor is generated. The refrigerant vapor is condensed into refrigerant water in the condenser, and its latent heat is carried by the cold water to the outside of the machine.

After the refrigerant water enters the evaporator, it is sprayed on the surface of the heat exchange tube by the refrigerant pump through the liquid distributor. The refrigerant water absorbs the heat of the cold water in the tube and boils at a low temperature to form refrigerant vapor again, and at the same time, low temperature cold water The cold source provided by the unit). The concentrated concentrated solution directly enters the absorber after passing through the heat exchanger, and is irrigated onto the absorber heat exchange tube by the liquid distributor. On the one hand, the concentrated solution absorbs the refrigerant vapor generated by the evaporator, and then becomes a dilute solution; on the other hand, it transfers the absorption heat released when the refrigerant vapor is absorbed to the cooling water.

The refrigeration cycle is a cycle in which the lithium bromide aqueous solution changes from thin to thick and then from thick to thin and the refrigerant water changes from liquid to vapor and then from vapor to liquid. The two cycles go on at the same time, repeating again and again.

The heat exchanger is a device that exchanges heat between high and low temperature solutions, which is beneficial to improve the thermal efficiency of the unit.

Crew Management Instructions

During operation

1. Although there is an automatic control device, it still needs daily inspection and regular maintenance.

2. Regularly check the PH value of lithium bromide solution and the content of corrosion inhibitor.

3. If the water quality cannot meet the requirements, corresponding measures should be taken.

Machine room size

The size of the machine room is related to the size of the unit. It is recommended that the size of the machine room is not smaller than the figure below. In the figure, A\B\C is the extubation space. One section of the unit can also be facing the door or window, and the door or window can be used as the extubation space. It is recommended that the height of the machine room is more than 200mm higher than the unit.

Room temperature

The temperature of the equipment room should be controlled at 5-40°C.

Computer room humidity

The equipment room should ensure sufficient ventilation. Poor ventilation will cause humidity in the equipment room, and high humidity will corrode the unit and affect electrical insulation. The humidity in the equipment room should be controlled below 90%.

Drain

Drainage ditch should be provided around the unit with cast iron orifice plate on it, and water in the ditch should be able to flow out of the machine room smoothly. The basement engine room should be equipped with a collection tank and a submersible pump, and the submersible pump should be equipped with an automatic control device that can automatically drain. All drain pipes and signal pipes in the equipment room should be placed in a visible place on the hook and cannot be buried in the trench.

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