I need help with this labOutside the building:Dry-bulb temp = 30oC or 86oFWet-bulb temp = 18oC or 84oFInside the building:Dry-bulb temp = 21oC or 70oFWet-bulb temp = 16oC or 61oF Lab 5 Humidity Variables1. Complete the tables below with your measurements and determinations of the humidity variables inside andoutside of the Engineering Building. In the first blank column of the table (titled Individual Measurement) fill in theboxes for the temperature and wet-bulb temperature. Average values of the temperature and wet-bulb temperaturefor all the measurements taken by everyone in the class will be used to complete the last column of the table (titledAverage Measurement). Use the temperature and wet-bulb temperature values and the average values of thesetemperatures in the last column, to determine the remaining humidity variables, using the psychrometric chart.Inside the Engineering BuildingHumidity VariableIndividual MeasurementT (°C) (measured)Tw (°C) (measured)Ta (°C)Vapor Pressure: e (mb)Dew-point Depression (°C)Relative Humidity (%)Outside the Engineering BuildingHumidity VariableIndividual MeasurementT (°C) (measured)Tw (°C) (measured)Ta (°C)Vapor Pressure: e (mb)Dew-point Depression (°C)Relative Humidity (%)Answer questions 2a – 2f by considering the parameter values in the last (right-hand) column of each of the abovetables.2a. Which location has the greater relative humidity?2b. Which location has the smaller dew point depression?2c. How do your answers to questions 2a and 2b relate to the conclusions that you drew in lab I concerning therelationship of dew point depression and relative humidity?41 Lab 5 Humidity VariablesNAS 125 Meteorology Lab 5NameHumidity VariablesMain Lab AssignmentI. IntroductionHumidity is a measure of the amount of water vapor present in the atmosphere, at a given time and location.Meteorologists use a number of different variables to represent the amount of moisture in a given sample of air. Theuse of so many different variables to representhumidity variables that will be presented in this lab has their own advantages and disadvantages.same basic measurement may seem strange, but each of theThe humidity variables used in this lab include:Vapor pressureSaturation vapor pressureRelative humidityDewpointWet-bulb temperatureLab Goals:(1) Learn about humidity variables and their inter-relationships(2) Determine relative humidity both indoors and out, using a psychrometric chart to interpret measurementsmade with a sling psychrometerII. Review of TermsSaturation: A given sample of air (an air parcel) is said to be saturated when the rate of evaporation from a flatsurface of water into the parcel is exactly equal to the rate of water vapor condensation onto the water surface, fromthe air parcel. In the atmosphere any addition of water vapor to a sample of air that is already saturated will result incondensation and the formation of clouds or fog. Therefore, when an air parcel is referred to as "saturated," the aircontains the maximum amount of water vapor possible at the prevailing temperature, without condensationoccurring.Vapor pressure (e): The vapor pressure is the pressure exerted by the water vapor molecules in a sample of air.The water vapor pressure contributes to the overall pressure similarly to the pressure contributions from the othergases present (nitrogen, oxygen, argon, etc.)Saturation vapor pressure (e,): The saturated vapor pressure is the contribution to the total pressure from the watervapor molecules in a sample of air that is saturated. A given air parcel will have separate values for the vaporpressure and the saturation vapor pressure associated with it. The vapor pressure is a measure of the amount of watervapor actually in the air parcel, while the saturation vapor pressure is a measure of the maximum amount of watervapor the air parcel could hold at its current temperature. (Remember that the saturation vapor pressure increases asthe temperature of the air parcel increases. When the air parcel is saturated the vapor pressure will equal thesaturation vapor pressure.Relative humidity (RH): The relative humidity is a measure of how close the air is to being saturated and is theratio of the actual vapor pressure to the saturation vapor pressure. (Relative humidity is also given by the ratio of themixing ratio to the saturation mixing ratio). Because the relative humidity is calculated based on the actual amountof water vapor in an air parcel and the maximum amount of water vapor an air parcel could hold (which depends onthe temperature of the air parcel) the relative humidity will change if either the amount of water vapor presentchanges or the temperature changes. This is an important idea to understand. It means that the relative humiditycannot be used when comparing the actual amount of water vapor present at two different locations or times (sincethe temperature may not have been the same when the two relative humidity measurements were made). If you areinterested in comparing the actual amount of water vapor present at two different locations, other humidity variablessuch as the vapor pressure, dewpoint, or wet-bulb temperature must be used.38

Given : Outside : Dry bulb temp = 30 C Wet bulb temp = 18 C Inside : Dry bulb temp = 21 C Wet bulb…

1. Complete the tables below with your measurements and determinations of the humidity variables inside and outside of the Engineering Building. In the first blank column of the table (titled Individual Measurement) fill in the boxes for the temperature and wet-bulb temperature. Average values of the temperature and wet-bulb temperature for all the measurements taken by everyone in the class will be used to complete the last column of the table (titled Average Measurement). Use the temperature and wet-bulb temperature values and the average values of these temperatures in the last column, to determine the remaining humidity variables, using the psychrometric chart. Inside the Engineering Building Humidity Variable Individual Measurement T (°C) (measured) Tw (°C) (measured) Ta (°C) Vapor Pressure: e (mb) Dew-point Depression (°C) Relative Humidity (%) Outside the Engineering Building Humidity Variable Individual Measurement T (°C) (measured) Tw (°C) (measured) Ta (°C) Vapor Pressure: e (mb) Dew-point Depression (°C) Relative Humidity (%) Answer questions 2a – 2f by considering the parameter values in the last (right-hand) column of each of the above tables. 2a. Which location has the greater relative humidity? 2b. Which location has the smaller dew point depression? 2c. How do your answers to questions 2a and 2b relate to the conclusions that you drew in lab I concerning the relationship of dew point depression and relative humidity?

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA