aircon finals

25 deg C

@ initial; td=30, tw=24

@mixed; td 22 tw 17

what is dry bulb temp

19.3 deg C

@ initial; td=30, tw=24

@mixed; td 22 tw 17

what is wet bulb temp

56 kj/kg

@ initial; td=30, tw=24

@mixed; td 22 tw 17

what is enthalpy

total heat load

overall heat to be removed from space

sensible heat load

amount of heat required to maintain the temperature difference between the room air and supplied air

latent heat load

in heat load calculation, it is required to to remove the excess moisture in the room

sensible heat ratio/ sensible heat factor

ratio of sensible and total heat

both a and b ( no recirculation and recirculation)

methods to analyze air conditioning space

70Kw

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

what is required sensible heat load

30kw

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

what is required latent heat load

10 kg/s

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

how much air is circulating

8.3 m3/s

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

capacity of fan in terms of volume

13deg C

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

what is apparatus dewpoint

QRL=353

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

what is ref effort

66gv/s

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

what is condensate drain

12 gv/s

@auditorium pt 4

26 C 50% RH. HL =100KW.

sensible heat ratio 70%

@fan blow pt 3 = 19C

@pt1 outdoor air 31C & 24C

what is moisture pickup

cooling tower

heat rejecting device, remove waste heat

recycle water by heating

not purpose of cooling tower

open cooling tower

type of cooling tower rely on direct air and water contact

induced draft

type of cooling tower placing fan from top

evaporative cooling

process of cooling tower

13889 kg/s

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

mass water enter in the condenser

111.1111kg/s

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

make up water

sh2= 10.539 gv/kg

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

moisture air carry in the cooling tower

6622 kga/s

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

air allowed to flow in tower

99.972 kj/kg

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

what is enthalpy of air carry out in cooling tower

34.65 C

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

what temperature is cooling water goes out of tower

13778 kg/s

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

what is exit mass upon leaving cooling tower

25%

tw in 40. td in 26. RH in 50%

t out 30. RH 100%

efficiency of cooling tower

internal combustion engine

since cooling tower are actually use. which if the following does not use cooling tower