The difference and working principle of evaporator and condenser

Evaporator and condenser are an important part of the refrigeration system, they play a vital role in the refrigeration process. The evaporator is a device used to absorb heat for vaporization, for material concentration or wastewater treatment, while the condenser is an external heat release device used to convert gas or steam into a liquid. This article will introduce the difference and working principle of evaporator and condenser in detail.

The working principle of the evaporator is to achieve the purpose of refrigeration through the evaporation of the refrigerant to absorb the heat of the refrigerant. The evaporator is mainly composed of two parts of the heating chamber and the evaporation chamber, the heating chamber generates high temperature flue gas through combustion and other ways, and carries out radiation heat exchange with water, and the evaporation chamber turns the water into a soft water mixture or water steam. The refrigerant of the evaporator changes from liquid to gas, which is a process of evaporation and heat absorption, and the pressure is low.

The working principle of the condenser is to achieve the purpose of cooling by condensing the refrigerant and releasing heat. The refrigerant of the condenser changes from gas to liquid, which is a process of condensation and heat release, and the pressure is generally very high. According to the cooling method, the condenser is divided into water-cooled, air-cooled and evaporation-cooled. Water-cooled condenser has high heat transfer coefficient, less cooling water consumption, convenient operation and management, but has high water quality requirements, and is widely used in large and medium-sized refrigeration units. Air cooled condenser is divided into free flow and forced flow two types, air free flow air cooled condenser does not need fan, no noise, more used in small refrigeration devices. Evaporative condenser uses water evaporation to take away condensation heat, cooling water consumption is small, especially suitable for dry water shortage areas.

The difference between evaporator and condenser mainly lies in their mode of operation and function. The evaporator absorbs heat through the evaporation of refrigerant to achieve the purpose of refrigeration, while the condenser releases heat through the condensation of refrigerant to achieve the purpose of refrigeration. The refrigerant of the evaporator changes from liquid to gas, which is the process of evaporation and heat absorption, and the pressure is low. The refrigerant of the condenser changes from gas to liquid, which is a process of condensation and heat release, and the pressure is generally very high.

To sum up, evaporators and condensers play a crucial role in refrigeration systems. Their working principle and function are different, but they all achieve the purpose of refrigeration through the evaporation and condensation of refrigerants. Understanding the difference and working principle of evaporator and condenser is of great significance for understanding the working principle and design of refrigeration system.