What Trouble May Appear During The Operation of The Ammonia Evaporator

Ammonia evaporator may have the following failures during operation:

Ammonia leakage:

This is the more serious fault. It may be caused by loose pipe connections, aging or broken seals, corrosion and perforation of the evaporator body. Ammonia leakage will not only affect the cooling effect, but also pose a threat to the environment and personnel safety.

Uneven frost:

If the surface of the evaporator is not uniformly frosted, it may be uneven distribution of refrigerant, unreasonable distribution of airflow or structural problems of the evaporator itself. This can lead to a poor cooling effect in some areas.

Reduced heat transfer efficiency:

For example, if the evaporator surface is dirty and scaled, it will affect the heat exchange and reduce the heat transfer efficiency, making the cooling effect worse.

Clogging:

Impurities in the system may clog the evaporator piping or throttling device, resulting in reduced refrigerant flow and affecting cooling performance.

Abnormal pressure:

Excessively high or low pressure may indicate a system failure, such as compressor failure, improper refrigerant charge, etc., which will affect the normal operation of the evaporator.

Poor oil return:

It may lead to oil shortage of the compressor, which affects its normal operation, and also affects the performance of the evaporator.

Electrical faults:

Such as sensor failure, control circuit problems, etc., which may lead to inaccurate monitoring of temperature, pressure and other parameters, affecting the automatic control of the system and operational stability.

Excessive vibration and noise:

Usually caused by improper installation, loose parts or wear and tear, etc., which may damage the evaporator and related parts in the long run.

The following are some measures to prevent the ammonia evaporator from malfunctioning:

Regular maintenance and inspection:

Develop a detailed maintenance programme, including regular cleaning of the evaporator surface of dirt and frost, and checking pipes and connections for signs of leakage.

Perform a thorough internal and external inspection of the evaporator at specified intervals for corroded, worn or deformed parts.

Ensure refrigerant quality:

Regularly test the purity and water content of the refrigerant to avoid damage to the evaporator caused by impurities and moisture.

Optimise system operating parameters:

Precisely control the refrigerant charge to ensure that it meets the design requirements of the evaporator, avoiding too much or too little.

Adjust the appropriate evaporation temperature and pressure to make it operate in the best working range.

Strengthen operator training:

Ensure that the operators are familiar with the working principle and operating procedures of the evaporator to avoid malfunction caused by improper operation.

Do daily monitoring:

Install effective temperature, pressure and flow sensors to monitor the operating status of the evaporator in real time.

Establish a data recording and analysis system to detect abnormal trends in time.

Improve ventilation and environmental conditions:

Ensure that there is good ventilation around the evaporator and avoid high temperature, high humidity and other unfavourable environmental factors.

Selection of high-quality materials and components:

Use corrosion-resistant, high-strength materials and reliable seals in the manufacture and maintenance of the evaporator.

Perform preventive maintenance:

Replace vulnerable parts, such as gaskets and filters, on a regular basis, and replace parts before they become seriously damaged.