How HVAC Noise points
The 5 path of noise
1.Duct borne noise
2. Radiated equipment noise
3. Break in noise
4. Break out noise
5. Terminal end noise
2. Radiated equipment noise:- it is caused by vibration of equipment and inherent sound pressure of the equipment
3. Break - in - noise :- it is radiated equipment noise that enters the duct work and propagates down the duct system
5. Terminal end noise :- it is caused by the air flows at the terminal devices such as diffuser or register
What is code ?
Code :- 1. A code is a standard that has been adopted by one or more governmental bodies and has the enforce by the Law r
When it has been incorporated into a business contract
2. Mandatory only it regulatory body in your country had adapted the said code as lows,other wise,code will serve as generally accepted guidelines for design, Fabrication,Construction and installation
What is standard ?
A standard can be defined as a set of technical definitions and guidelines how to instructions for designers and manufactures
They serve as a common language, defining quality and establishing safety criteria
Standard is required ?
1. Standard are document that establish engineering or technical requirements for products, practies methods or operations
2. Build confidence about quality in users
3. Lower the cost of production as required ments are standardised
2. Build confidence about quality in users
3. Lower the cost of production as required ments are standardised
What is Constant Air Volume ?
2. In a simple constant air volume system the supply air flow rate is constant but the supply air temperature is varied to meet the thermal loads of a space
3. Most constant air volume system are small and serve a single thermal zone
Constant Air Volume
1. HVAC Systems require high air flow rates and higher amounts of energy for heating and cooling this increasing utility costs
2. Constant Air Volume unit operates the fan and compressor at full capacity until the temperature drops to as specified setting
Then the compressor turns off the on/off cycling is not efficient at keeping the space at a constant temperature
3. Constant Air Volume systems are becoming less
Common in new building they are particularly
Common in simple systems where fan coil units are supplied with a constant volume of fresh air
To Continue Click here
hvactech1.blogspot.com
No comments:
Post a Comment