Q.1// A conference room is to be air conditioned for comfort conditions of (25°C) DBT and (50% RH). The outdoor air conditions are (35°C DBT) and (28°C WBT). The sensible and latent heat are (43200 kJ/hr) and (36000 kJ/hr) respectively. The return air from the conference room is mixed with outdoor air before entering the cooling coil as shown in the Figure below. In addition, the return air from the (conference room) is mixed with cooling air (after cooling coil) see Figure below, where cooling coil by bass factor (BPF = 0.1) and (ADP =10°C). The air is reheated to (21°C DBT) before supplying to room. Note: point 6 not equal to point 1. Determine: 1- Conditions at point 3 (DBT3, WBT3, RH3, h3). 2- Conditions at point 4 (DBT4, WBT4, RH4, h4). 3- Conditions at point 5 (DBT5, WBT3, RH5, hs). 4 - Conditions at point 6 (WBT6, RH6, h6). 5- The total quantity of air supplied to conference room (kg/sec). 6- Capacity of reheated coil (kJ/kg). 7- Sensible heat factor SHF. 8 - Capacity of cooling coil (kJ/kg). 9 - Contact factor of cooling coil. 10 – Sketch the process on the Psychometric chart. REHEATER SUPPLY AIR Cooling coil VENTED AIR FRESH AIR FAN- CONDITIONED SPACE 3 4 2 conference room 1 kg 1 kg 1 kg 5 kg 11 3 kg
Q.1// A conference room is to be air conditioned for comfort conditions of (25°C) DBT and (50% RH). The outdoor air conditions are (35°C DBT) and (28°C WBT). The sensible and latent heat are (43200 kJ/hr) and (36000 kJ/hr) respectively. The return air from the conference room is mixed with outdoor air before entering the cooling coil as shown in the Figure below. In addition, the return air from the (conference room) is mixed with cooling air (after cooling coil) see Figure below, where cooling coil by bass factor (BPF = 0.1) and (ADP =10°C). The air is reheated to (21°C DBT) before supplying to room. Note: point 6 not equal to point 1. Determine: 1- Conditions at point 3 (DBT3, WBT3, RH3, h3). 2- Conditions at point 4 (DBT4, WBT4, RH4, h4). 3- Conditions at point 5 (DBT5, WBT3, RH5, hs). 4 - Conditions at point 6 (WBT6, RH6, h6). 5- The total quantity of air supplied to conference room (kg/sec). 6- Capacity of reheated coil (kJ/kg). 7- Sensible heat factor SHF. 8 - Capacity of cooling coil (kJ/kg). 9 - Contact factor of cooling coil. 10 – Sketch the process on the Psychometric chart. REHEATER SUPPLY AIR Cooling coil VENTED AIR FRESH AIR FAN- CONDITIONED SPACE 3 4 2 conference room 1 kg 1 kg 1 kg 5 kg 11 3 kg
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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Transcribed Image Text:Q.1// A conference room is to be air conditioned for comfort conditions of (25°C) DBT and
(50% RH). The outdoor air conditions are (35°C DBT) and (28°C WBT). The sensible and
latent heat are (43200 kJ/hr) and (36000 kJ/hr) respectively. The return air from the conference
room is mixed with outdoor air before entering the cooling coil as shown in the Figure below.
In addition, the return air from the (conference room) is mixed with cooling air (after cooling
coil) see Figure below, where cooling coil by bass factor (BPF = 0.1) and (ADP =10°C). The
air is reheated to (21°C DBT) before supplying to room.
Note: point 6 not equal to point 1.
Determine:
1- Conditions at point 3 (DBT3, WBT3, RH3, h3).
2 - Conditions at point 4 (DBT4, WBT4, RH4, h4).
3 - Conditions at point 5 (DBT5, WBT5, RH5, h5).
4 - Conditions at point 6 (WBT6, RH6, h6).
5- The total quantity of air supplied to conference room (kg/sec).
6- Capacity of reheated coil (kJ/kg).
7- Sensible heat factor SHF.
8 - Capacity of cooling coil (kJ/kg).
9 - Contact factor of cooling coil.
10 - Sketch the process on the Psychometric chart.
REHEATER
SUPPLY AIR
Cooling coil
VENTED
AIR
FRESH AIR
FAN-
CONDITIONED
SPACE
2
conference room
1 kg
1 kg
1 kg
5 kg
三1
3 kg
a
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