When customizing our Hope Deepblue LiBr absorption chillers and heat pumps, we often hear the terms "dry bulb temperature" and "wet bulb temperature." Although they may seem technical, understanding them is crucial to the operation and performance of air conditioning and refrigeration systems in our daily lives, especially for LiBr absorption chillers.

Dry Bulb Temperature (DBT) is what we usually refer to as air temperature. It is measured directly by an ordinary thermometer without considering the air's humidity. Dry bulb temperature is an indicator of the heat content of the air and is commonly used for weather forecasting and environmental temperature measurements.

Wet Bulb Temperature (WBT) is the temperature measured by a thermometer wrapped with a wet cloth. This measurement method takes into account the air's humidity. The water in the wet cloth evaporates, absorbing heat in the process, which causes the thermometer reading to drop. Wet bulb temperature reflects the saturation level of water vapor in the air, and it is always equal to or lower than the dry bulb temperature.

The difference between dry bulb temperature and wet bulb temperature can be used to calculate relative humidity and dew point temperature. The greater the difference, the lower the humidity in the air; the smaller the difference, the higher the humidity in the air. When the air humidity reaches 100%, the dry bulb temperature and wet bulb temperature are equal, indicating that the air is saturated and cannot hold more water vapor.

The efficiency of LiBr absorption chillers is closely related to the temperature of the cooling water. The lower the wet bulb temperature, the better the cooling effect of the cooling tower, thereby improving the chiller's efficiency. Therefore, wet bulb temperature, to a certain extent, determines the overall performance of the refrigeration system. Additionally, understanding both dry bulb temperature and wet bulb temperature helps in adjusting the operating conditions of LiBr absorption chillers. In high humidity environments, the cooling effect of the cooling tower may decrease, requiring adjustments to the cooling water flow or increasing the ventilation of the cooling tower to maintain the normal operation of the chiller.