Technology

Air dryers repairs

Air dryers repairs

Atmospheric air always contains moisture: the higher temperature, the higher humidity is typical for the air. However, when compressed air is accumulated moisture, the water is condensing on the internal parts of the equipment and pneumatic systems. It is the case of corrosion and reduce the equipment lifetime. Therefore usually the additional air treatment equipment, like air dryer are used to avoid the accumulation of moisture in the pneumatic system.
Kobelco air compressor maintenance

Kobelco air compressor maintenance

Minh Phu Machine and Technical Services Co., Ltd specializes in providing consulting, repair and maintenance services of Kobelco Japanese air compressors.Moreover, Minh Phu also provides Kobelco parts: compressor oil, oil separator, oil filter, air filter, bearings, solenoid ...
Air end repairs

Air end repairs

After air end diagnostics, our engineers estimate the necessary repairs and provide calculation of the repairs and necessary spare parts
How to choose air tank

How to choose air tank

The air reclever tank is an important device in the compressed air system with these following function of: Accumulating gas, stabilizing pressure, Increase idling time, condensating water in the output etc..
Kobelco Genuine Screw Oil

Kobelco Genuine Screw Oil

Kobelco( genuine- screw oil) has googd quality. Although the company declined to disclose the chemical composition. However, after using a lot of positive feedback are received about product quality. Although the company has announced that it is only dedicated to its machine, we have tested it for many different air compressors and have not encountered any other problems such as oil glue, scaling, loss ability of lubrication and cooling...

Classifications of chiller

Wednesday - 26/12/2018 23:52
cau tao may lam lanh nuoc water chiller 2

 

In the air-conditioning system using water as refrigerant, the Chiller is the most important detail. The choice of which Chiller is suitable for a specific project requires the design engineer to be knowledgeable about each type of Chiller. to provide the optimal plan for each type.

 1. Chiller working principle:

Chiller is a machine that produces cool water to supply to the load of the building. It is a combination of 4 basic components: compressors, evaporators, condensers and throttle valves. For evaporators water will cool the water.

2.Chiller classifications

- Absorption Chiller: Principle based on absorption chiller cycle: Understandably, Absorption bottle is as compressor, Pump is as compressor and Generator is (Steam generator) as compressor airend. The rest devices are as the cool cycle have steam compressors.

This chiller has 3 main types : 

For these Chillers, the COP coefficient is quite small ranging from 0.6-0.8 for Single-Effect, from 0.9-1.2 for Double-Effect, from 0.9-1.1 for Direct-Fired. These chiller is not wwidely used in air conditioning work in Vietnam because of low capacity. Single-Effect can take heat from the production process to provide steam for Chiller to run. Type Double-Effect requires slightly medium pressure steam. The bottle should normally be applied in specialized boiler. The Direct-Fired integrates an additional combustion chamber, rarely based on heat source.

Clasifications chiller to compressor:

+ Piston Chiller 

This Chiller capacity is less than 200 Tons (RT). Due to the characteristics of Piston compressors such as dead volume, high noise, poor performance.Therefore Chiller uses compressor this piston is practically not used. The cooling capacity is mainly adjusted through cylinders. In addition, Piston compressors have many details, the demage is higher than that of other chillers. Therefore, this type of Chiller is often replaced by a chiller using  a screw compressor with the same cooling capacity.

+Scroll Chiller :

Capacity range is also limited to less than 200 RT. Spiral type has much higher efficiency than Piston, Spiral type compressor has less detail than Piston type is 64%. Compact structure, smooth operation than + Chiller type using Screw compressor: Normally the power range is from 50RT to 1100 RT, in addition, the capacity of some firms may be larger. Similar to the scoll compressor, the screw compressor holds the gas on the screw groove and then compressesing them by reducing the volume of cool gas. The cold air enters into the compression room through the suction at the top of the compression room. Due to the screw compressor only 3 main parts are 2 screws and slide valve so the working life will be higher, high efficiency, quiet operation. It is able to adjust stepless load through sliding valve. Power consumption is much smaller than Chiller using Piston compressor. There are 2 main types: horizontal and vertical screw. In fact, this type is used for small and medium-sized buildings, about under 600RT.

+Chiller uses Centrifugal compressor

Capacity from 550RT to 3000RT, especially suitable for large projects. Advantages are high efficiency and reliability. However, large size due to problem of oil recovery centrifugal compressor. Evaporation flask because of its compact size and high heat transfer characteristics. This chiller can be classified according to the layout of the main details in Chiller:
+ One floor or many floors.
+ Type of wind or water cooling
+ Open or closed type
+ Direct transmission or by gear.
+ Adjust the cooling capacity according to Inlet vanes.

Minh Phu provides maintenance and repair services for air compressors, in addition Minh Phu also provides spare parts for air compressors with high quality at reasonable prices. For further information, please contact (+84)919 23 28 26. Sincerely thank you for your interest and your trust of our service.

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