# How do you read a carrier psychrometric chart?

## How do you read a carrier psychrometric chart?

To read a psychometric chart, find the dry bulb temperature on the horizontal or X axis. Check the vertical or Y axis for the humidity ratio. The uppermost curved line on the chart shows the saturation curve when the relative humidity is 100 percent.

What are the parameters in psychrometric chart?

You can find a psychrometric chart that offers these temperature ranges: Low temperatures that range from -20 degrees FDB to 50 degrees FDB. Normal temperatures that range from 20 degrees FDB to 100 degrees FDB. High temperatures that range from 60 degrees FDB to 250 degrees FDB.

### What are the units for enthalpy on the psychrometric chart?

Enthalpy – h Energy content is expressed as energy per unit weight of air (Btu/lbair, J/kgair). Enthalpy in the psychrometric chart can read from where the appropriate wet-bulb line crosses the diagonal scale above the saturation curve.

What is DBT and WBT in psychrometric chart?

Knowing both the dry-bulb temperature (DBT) and wet-bulb temperature (WBT), one can determine the relative humidity (RH) from the psychrometric chart appropriate to the air pressure.

## How do you calculate grains per pound?

To convert the number of grains to pounds we merely divide by 7,000, or if we want to convert grains directly to gallons, we divide the number of grains by 58,310 (7,000 x 8.33).

How do you fill out a psychrometric chart?

the psychrometric chart:

1. Locate the dry bulb tem- perature.
2. Locate the ‘humidity ratio’ along the right vertical axis.
3. Locate the left most curved. line.
4. Locate the interior curved. lines.
5. On the right side of the.
6. On the other side of the.
7. Look at the information on.
8. Look closely and find a.

### Which are the 5 factors indicated on a psychrometric chart?

About the Psychrometric Chart

• dry bulb temperature.
• wet bulb temperature (also known as saturation temperature)
• dew point temperature.
• relative humidity.
• moisture content (also known as humidity ratio)
• enthalpy (also known as total heat)
• specific volume (the inverse of density)

What does DB and WB mean?

DB = Dry-bulb; the temperature of air without taking account for evaporation/relative humidity. WB = Wet-bulb; the temperature of the air with the evaporative effect of a “wet bulb” taken into account.

## What is WB and DB temperature?

DB temp is indicative of the sensible heat content of the air. Wet Bulb (WB) temperature is the temperature of air as registered by a thermometer whose temperature sensing bulb is covered by a material (cloth) soaked in water and exposed to a rapidly moving current of air.

What is DB and WB in HVAC?

### When DBT is equal to WBT?

When the relative humidity of the air is 100%, i.e the air is saturated, the dew point temperature (DPT) equals the wet-bulb temperature (WBT), which is also equal to the dry-bulb temperature.