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Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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![Q.1 An air conditioning system supplying air to a space with a sensible heat load of 14 kW and a
latent heat load of 9 kW has a cooling coil and a bypass path as shown schematically in Fig. The db-
temperature of the space is maintained at 26°C. The dry air mass flow rate of supply air is 1.2kg/s.
Outdoor ventilation air at 34°C db-temperature and 50% relative humidity is introduced into the
system with a dry air mass flow rate of 0.26 kg/s. The air leaving the cooling coil is fully
saturated at a db-temperature of 6°C. The pressure is constant at 101.3 kPa. Determine
(i)
(ii)
(ii)
(iv)
db-temperature and relative humidity of the supply air to the space,
wb-temperature of the space,
temperature of the air entering the cooling coil, and
refrigeration capacity of the cooling coil.
100
105
110
115
120 kJ/kg(d.a)
30
95
29
1.
28
90
27
85
26
SENSIBLE HEAT
TOTAL HEAT
Qt
80
25
1.0
24
75
23
70
22
65.
ENTHALPY
HUMIDITY RATIO aw
dH
21
60
20
19
55
18
50
17
45
16
15
40
14
35
13
30
12
500
:-
25
20
11
10
9
15
8
10
7
g0%
6
5
5
10%
3
2
1
-10
-10
-5 0 5
10
15
20
25
30
35
40
50
45
Dry Bulb Temperature, °C. Pressure = 101325 Pa
Humidity Ratio, g/kg(d.a)
09
%08
70%
%06
-0.5-](https://content.bartleby.com/qna-images/question/4579e092-47b0-4b67-84f8-b69f05955071/d82627c0-101d-435a-87e9-a08da6c90287/kt46zzq_thumbnail.jpeg)
Transcribed Image Text:Q.1 An air conditioning system supplying air to a space with a sensible heat load of 14 kW and a
latent heat load of 9 kW has a cooling coil and a bypass path as shown schematically in Fig. The db-
temperature of the space is maintained at 26°C. The dry air mass flow rate of supply air is 1.2kg/s.
Outdoor ventilation air at 34°C db-temperature and 50% relative humidity is introduced into the
system with a dry air mass flow rate of 0.26 kg/s. The air leaving the cooling coil is fully
saturated at a db-temperature of 6°C. The pressure is constant at 101.3 kPa. Determine
(i)
(ii)
(ii)
(iv)
db-temperature and relative humidity of the supply air to the space,
wb-temperature of the space,
temperature of the air entering the cooling coil, and
refrigeration capacity of the cooling coil.
100
105
110
115
120 kJ/kg(d.a)
30
95
29
1.
28
90
27
85
26
SENSIBLE HEAT
TOTAL HEAT
Qt
80
25
1.0
24
75
23
70
22
65.
ENTHALPY
HUMIDITY RATIO aw
dH
21
60
20
19
55
18
50
17
45
16
15
40
14
35
13
30
12
500
:-
25
20
11
10
9
15
8
10
7
g0%
6
5
5
10%
3
2
1
-10
-10
-5 0 5
10
15
20
25
30
35
40
50
45
Dry Bulb Temperature, °C. Pressure = 101325 Pa
Humidity Ratio, g/kg(d.a)
09
%08
70%
%06
-0.5-
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