Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 340 views

    Dry and Wet Bulb Temperature

    Uploaded by

    nithansa
    This experiment aims to determine various properties of atmospheric air using wet bulb and dry bulb temperatures. The wet bulb temperature is measured using a thermometer covered in a wet wick, and indicates the temperature air must be cooled to for saturation when water evaporates. The dry bulb temperature directly measures the air temperature. Absolute humidity, relative humidity, and dew point can be calculated from psychrometric charts using the wet and dry bulb readings. The experiment involves taking wet and dry bulb temperature readings inside a laboratory to determine these properties.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd

    Dry and Wet Bulb Temperature

    Uploaded by

    nithansa
    340 views5 pages
    This experiment aims to determine various properties of atmospheric air using wet bulb and dry bulb temperatures. The wet bulb temperature is measured using a thermometer covered in a wet wick, and indicates the temperature air must be cooled to for saturation when water evaporates. The dry bulb temperature directly measures the air temperature. Absolute humidity, relative humidity, and dew point can be calculated from psychrometric charts using the wet and dry bulb readings. The experiment involves taking wet and dry bulb temperature readings inside a laboratory to determine these properties.

    Original Description:

    Dry and Wet Bulb Temperature

    Copyright

    © Attribution Non-Commercial (BY-NC)

    Available Formats

    DOC, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    This experiment aims to determine various properties of atmospheric air using wet bulb and dry bulb temperatures. The wet bulb temperature is measured using a thermometer covered in a wet wick, and indicates the temperature air must be cooled to for saturation when water evaporates. The dry bulb temperature directly measures the air temperature. Absolute humidity, relative humidity, and dew point can be calculated from psychrometric charts using the wet and dry bulb readings. The experiment involves taking wet and dry bulb temperature readings inside a laboratory to determine these properties.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    340 views5 pages

    Dry and Wet Bulb Temperature

    Uploaded by

    nithansa
    This experiment aims to determine various properties of atmospheric air using wet bulb and dry bulb temperatures. The wet bulb temperature is measured using a thermometer covered in a wet wick, and indicates the temperature air must be cooled to for saturation when water evaporates. The dry bulb temperature directly measures the air temperature. Absolute humidity, relative humidity, and dew point can be calculated from psychrometric charts using the wet and dry bulb readings. The experiment involves taking wet and dry bulb temperature readings inside a laboratory to determine these properties.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    of 5

    Chemical Engineering Department

    EXPERIMENT NO.

    DRY BULB AND WET BULB TEMPERATURE

    DRY BULB AND WET BULB TEMPERATURE

    Chemical Engineering Department

    EXP.:DRY BULB AND WET BULB TEMPERATURE AIM:To find out the propert of atmo!pheric air "ith the help of "et #ul# and dr #ul# temperature propert of air "hich i! to #e found a! under$% &' A#!olute humidit (' De" point )' Relati*e humidit APPARATUS:+and, #ea-er, thermometer, cotton thread!, etc.. MATERIAL:Water. THEORY:The "et #ul# temperature i! the !tead !tate temperature # !mall amount of li/uid e*aporating in a large amount of un!aturated *apour ga! mi0ture under propert control condition. 1t can #e u!ed to mea!ure the humidit of the mi0ture for thi! purpo!e thermometer "ho!e #ul# ha! #een co*ered "ith "ic- -ept "et "ith the li/uid i! impre!!ed in rapidl mo*ing !team of the ga! mi0ture the temperature indicated # thi! thermometer "ill automaticall reach the *alue lo"er than the dr #ul# temperature of ga! in the "ater i! un!aturated. 1t i! indicated # T". Dr #ul# temperature i! the temperature of ga! mi0ture a! ordinar determined # e0pre!!ion of a thermometer in a mi0ture. The !imple humidit e0pre!!ed a#!olute humidit . The ratio of ma!! of *apour to ma!! of ga! i! a#!olute humidit than it i! e0pre!!ed # 2Y3. The mathematic! i! re!pre!ented a! follo",

    DRY BULB AND WET BULB TEMPERATURE

    Chemical Engineering Department

    Relati*e humidit i! e0pre!!ed a! relati*e !aturation. 1t i! ratio of partial pre!!ure of *apour to the pre!!ure of li/uid at ga! temperature. Unit of relati*e humidit i! atm4atm or mole fraction4mole fraction "hich i! e0pre!! in 5 a!&66 4 !. Due point i! the temperature at "hich *apour #eing! to conden!e "ith the ga! pha!e i! cooled at con!tant pre!!ure. 1t i! indicated # 2Td3. 7rom the -no"ledge of "et #ul# and dr #ul# temperature. 1t i! u!ed to find the *ariou! propertie! of *apour ga! mi0ture "ith help of p! chometric chart!. PROCEDURE:&' Arrange the "et #ul# and dr #ul# thermometer a! !ho"n in figure at different location. (' +elect the location and -eep the thermometer in the area of "hich p! chometric propertie! are to #e found. )' Allo" the #oth thermometer to reach e/uili#rium. RESULT:&' Molal a#!olute humidit 8 9999999 dr air. (' Relati*e humidit 8 999995 )' De" point 8 9999oC mole! of "ater4mole! of

    APPLICATION:1t i! u!e in p! chometric chart to -no" the temperature.

    OBSERVATION TABLE:Sr. NO. &. Location 1n!ide La#orator W t T $%. B!"# Dr& t $%. #!"#

    CALCULATION:3
    DRY BULB AND WET BULB TEMPERATURE

    Chemical Engineering Department

    DATA$ o &' :apour Pre!!ure at C 8 mm ;g. o (' :apour Pre!!ure at C 8 mm ;g. o o )' De" point 999999 C at9999999 C 9999999 oC at 9999999 oC o <' A#!olute ;umidit at C 8 999999999999=g Water4=g dr "ater. >' Molal a#!olute humidit 2 3

    ;ere , MA 8 Molecular "eight of air "ater 8 999999gm4mol. MB 8 Molecular "eight of air 8 99999999gm4mol. Y8 8 99 ?' Partial Pre!!ure of :apour @PA'$%

    ;ere, Y 8 Molal a#!olute humidit Pt8 Total pre!!ure 99 PA8 8 A' Relati*e ;umidit @R;'$% 99 R; 8 PA 4 PA B &66. 99 ;ere, PA 8 Partial Pre!!ure of :apour 8 PA 8 :apour Pre!!ure 8 R; 8 8 C' ;umid :olume @:;'$% :; 8 C)&>D@&4MB E F4MA' D@ t? E (A)'4Pt ;ere, MA 8 Molecular "eight of "ater 8 999999gm4mol. MB 8 Molecular "eight of air 8 9999999gm4mol.
    DRY BULB AND WET BULB TEMPERATURE

    Chemical Engineering Department

    YF air t? pt :; 8

    8 A#!olute humidit

    8 9999999-g of "ater4-g of dr

    8 Dr #ul# temperature 8 )) oC. 8 &.6&)(> N4M(

    DRY BULB AND WET BULB TEMPERATURE

    You might also like