Upload
ahmed-hassan
View
1.211
Download
32
Tags:
Embed Size (px)
DESCRIPTION
Citation preview
1
HVAC SystemAHU Control & Troubleshooting
Eng. Ahmed Hussein
2
Introduction to HVAC Systems
Objective Comfort Zone
Temperature 22 °C 26 °C
Relative Humidity 40 % R.H 60 % R.H
Comfort Zone 24 °C & 50 % R.H HVAC Systems, AHU Control &
Troubles1hooting
3
Indoor Air Quality (IAQ)
HVAC Systems, AHU Control & Troubles1hooting
4
HVAC System Components
Where’s the fresh air duct ?!?!!
HVAC Systems, AHU Control & Troubles1hooting
5
1.Chiller
HVAC System Components
HVAC Systems, AHU Control & Troubles1hooting
6
HVAC System Components2. Cooling Tower
HVAC Systems, AHU Control & Troubles1hooting
Chiller Refrigerant Cycle
Condenser
Compressor
7
HVAC System Components3. Boiler
HVAC Systems, AHU Control & Troubles1hooting
8
HVAC System Components4. Air Handling Unit (AHU)
HVAC Systems, AHU Control & Troubles1hooting
Supply Duct Fan Vibration Connection
Cooling Coil
Filter Sectio
n
Return Duct
9
HVAC System Components5. VAV (Variable Air Volume)
HVAC Systems, AHU Control & Troubles1hooting
10
HVAC System Components6. Ductworks & Air Terminals
HVAC Systems, AHU Control & Troubles1hooting
11
AHU Control & Troubleshooting
Control Concept 1. Sensor 2. Controller Device (Brain)3. Actuator
HVAC Systems, AHU Control & Troubles1hooting
Sensor
Controller
Actuator
Input
Output
Set Point (Value)
12
AHU Control & Troubleshooting
HVAC Systems, AHU Control & Troubles1hooting
Sensor
Controller
Actuator
Input
Output
1- Thermostat2- Pressure Gauge3- R.H % Sensor4- DPS5- Flow Switch
BMSDDCMCC
1- Motorized Damper2- Two-way Valve3- Three-way Valve4- VSD
13
AHU Control
HVAC Systems, AHU Control & Troubles1hooting
Exhaust Air
Supply Air
Return Air
Return Fan
Supply Fan
E
H
M
M
M
M
MCC
DDC
AO
T
TDPS
DPS
AO
AO
AO
DO
DI
AI
AI
AI
AI
AO