How can you lower the humidity of air circulated by an air conditioning system?

How can you lower the humidity of air circulated by an air conditioning system?

• A. By increasing air temperature
• B. By cooling the air to a point below dew point and then reheating it
• C. By using a dehumidifier only
• D. By increasing the speed of air circulation

Answer: (B)

To lower the humidity of air circulated by an air conditioning system, cooling the air to a point below the dew point and then reheating it is an effective method. When air is cooled below its dew point, moisture in the air condenses into water, effectively reducing the humidity level. This process is fundamental in air conditioning systems, where the evaporator coil cools the air, causing moisture to condense and drip away, thus removing humidity from the air. After this cooling and condensation process, reheating the air helps to bring it back to a comfortable temperature for circulation within the space. This method ensures that the humidity is effectively reduced without creating overly cold conditions that might be uncomfortable for occupants. While increasing air temperature and the speed of air circulation can affect perceived comfort levels, they do not directly address the removal of humidity from the air. Similarly, while using a dehumidifier can assist in reducing humidity, efficient air conditioning systems can also effectively handle humidity as part of their operation. Hence, the most direct method of reducing humidity in an air conditioning context is achieved by cooling the air below the dew point and then reheating it.

To lower the humidity of air circulated by an air conditioning system, cooling the air to a point below the dew point and then reheating it is an effective method. When air is cooled below its dew point, moisture in the air condenses into water, effectively reducing the humidity level. This process is fundamental in air conditioning systems, where the evaporator coil cools the air, causing moisture to condense and drip away, thus removing humidity from the air.

After this cooling and condensation process, reheating the air helps to bring it back to a comfortable temperature for circulation within the space. This method ensures that the humidity is effectively reduced without creating overly cold conditions that might be uncomfortable for occupants.

While increasing air temperature and the speed of air circulation can affect perceived comfort levels, they do not directly address the removal of humidity from the air. Similarly, while using a dehumidifier can assist in reducing humidity, efficient air conditioning systems can also effectively handle humidity as part of their operation. Hence, the most direct method of reducing humidity in an air conditioning context is achieved by cooling the air below the dew point and then reheating it.