Outdoor air conditions are: 28°C db, 19.5°C wb Return air conditions are: 22°C db, 50% RH. The mixture air condition outlet the cooling coil are: 10°C db, 0.00735 kg/kgda Draw the system on the Psychrometric chart, then calculate: 1. Cooling coil load. 2. Room sensible heat. 3. Room latent heat. 4. Fresh (outdoor) load. 5. Duct and fan heat gain 6. Sensible heat ratio SHR. If the supply air temperature increases with a value 1ºK due to fan motor heat gain and 2ºK due to duct heat gain.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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100%
3:57
A
Done lecture 7_b5ee35c08478147bb8a3744a...
Lec. (7)
tar
-Dry bulb temperature
O
Example (1): An air conditioning equipment (figure) have the following:
- Supply air mass-1.26 kg/s.
The cooling coil receives 20 % outdoor air and 80% return air.
tdz
Fig. 18.14. Representation of supply air
condition and room design condition.
0.252 kg/s
Refrigeration and A/C
- Outdoor air conditions are: 28°C db, 19.5°C wb
Return air conditions are: 22°C db, 50% RH.
The mixture air condition outlet the cooling coil are: 10°C db, 0.00735
kg/kgda
Draw the system on the Psychrometric chart, then calculate:
1. Cooling coil load.
2. Room sensible heat.
3. Room latent heat.
4. Fresh (outdoor) load.
5. Duct and fan heat gain
6. Sensible heat ratio SHR.
If the supply air temperature increases with a value 1°K due to fan motor heat
gain and 2°K due to duct heat gain.
.
←
1.008 kg/s
R
to
Dr. Omar M. Ali
LTE
الغرفة المراد تكييفها
(22,50 %)
1.26 kg/s
R
Grand Sensible Heat Factor
It is defined as the ratio of the total sensible heat to the grand total heat which
the cooling coil or the conditioning apparatus is required to handle.
Transcribed Image Text:3:57 A Done lecture 7_b5ee35c08478147bb8a3744a... Lec. (7) tar -Dry bulb temperature O Example (1): An air conditioning equipment (figure) have the following: - Supply air mass-1.26 kg/s. The cooling coil receives 20 % outdoor air and 80% return air. tdz Fig. 18.14. Representation of supply air condition and room design condition. 0.252 kg/s Refrigeration and A/C - Outdoor air conditions are: 28°C db, 19.5°C wb Return air conditions are: 22°C db, 50% RH. The mixture air condition outlet the cooling coil are: 10°C db, 0.00735 kg/kgda Draw the system on the Psychrometric chart, then calculate: 1. Cooling coil load. 2. Room sensible heat. 3. Room latent heat. 4. Fresh (outdoor) load. 5. Duct and fan heat gain 6. Sensible heat ratio SHR. If the supply air temperature increases with a value 1°K due to fan motor heat gain and 2°K due to duct heat gain. . ← 1.008 kg/s R to Dr. Omar M. Ali LTE الغرفة المراد تكييفها (22,50 %) 1.26 kg/s R Grand Sensible Heat Factor It is defined as the ratio of the total sensible heat to the grand total heat which the cooling coil or the conditioning apparatus is required to handle.
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