What is the dry bulb temperature when the wet bulb temperature is 67 degrees F and the humidity ratio is 80 grains/# dry air?

To determine the dry bulb temperature when the wet bulb temperature is 67 degrees F and the humidity ratio is 80 grains per pound of dry air, it's important to understand the relationship between these variables in HVAC applications.

The wet bulb temperature, which is the lowest temperature that can be reached by evaporative cooling, provides crucial information about the moisture content in the air. The humidity ratio indicates how much moisture is present in the air, further influencing the dry bulb temperature.

As the wet bulb temperature rises and the humidity increases, the dry bulb temperature is likely to be lower than one may initially think. Given that the wet bulb is 67 degrees F and the humidity ratio is relatively high at 80 grains per pound of air, it suggests that the air is fairly close to saturation.

Through psychrometric calculations or using a psychrometric chart, one can plot the wet bulb temperature and humidity ratio, which leads to finding the corresponding dry bulb temperature. In this case, the intersection on the chart suggests that with a wet bulb temperature of 67 degrees F and a high humidity ratio, the appropriate dry bulb temperature is indeed around 79 degrees F.

This analysis indicates that answer B is substantiated by how these principles work together in determining