This document discusses duct design and air distribution for air conditioning systems. It describes the key components of an air distribution system including supply and return air ducts and outlets. It classifies ducts as either high or low velocity and notes that low velocity ducts using rectangular shapes are most common. The document discusses factors that influence duct design like aspect ratio, pressure losses, and different duct sizing methods such as velocity reduction, equal friction loss, and static pressure recovery. It concludes with descriptions of air outlets and their typical locations in a room.
To design any air-conditioning unit, estimation of heating or cooling load is very important. It helps us in design different devices most importantly the humidifier (in case of winter) or de-humidifier (in case of summer).
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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(C) 2024 Robbie E. Sayers
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Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Event Management System Vb Net Project Report.pdfKamal Acharya
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My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
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2. Introduction
• The air which is processed in air handling unit
is applied to the room which are to be air
conditioned.
• This requires an air distribution system.
• Components:
– Supply air duct
– Supply air outlet
– Return air outlet
– Return air duct
3. Classification
• High velocity duct
– Velocities higher than 750 m/min are considered high
velocities.
– The higher velocities cause greater noise and large pressure
drop.
• Low velocity duct
– Most of the air conditioning systems use low velocities due
to noise level considerations.
4. Shape of Duct
• The circular shape is most compact shape which
requires less material and has least frictional pressure
drop. It is difficult to construct.
• The square shape is also a compact shape and not
economical to maintain throughout the length of duct.
• The rectangular shape is the most common shape for
low velocity ducts because it is easy to construct at
site.
5. Lower aspect ratio
• Lower aspect ratio: ratio of larger to smaller
dimension of cross-section.
– Less material due to lesser perimeter.
– Less material due to higher gauge of sheet.
– Lesser cost of installation.
– Lesser insulation cost.
– Lesser running cost due to lesser pressure drop.
6. Pressure Losses
• Loss of pressure due to friction between moving
particles of fluid and the interior surface of duct
and it occurs throughout the duct length.
• Dynamic loss of pressure occurs due to change in
cross section of the duct and also due to change in
direction of the duct.
7. Velocity Reduction Method
• The velocity method is one of the simplest ways of
designing the duct system for both supply and return
air. However, the application of this method requires
selection of suitable velocities in different duct runs,
which requires experience.
8. Equal Friction Loss Method
• This method is based on the principle that friction rate
per unit length in the entire duct system would be
maintained constant and the duct sizes would be
calculated for different discharges by keeping friction
rate constant.
• This method is generally suitable when the ducts are
not too long, and it can be used for both supply and
return ducts. However, similar to velocity method, the
equal friction method also requires partial closure of
dampers in all but the index run, which may generate
noise
9. Static Pressure Recovery Method
• This method is commonly used for high velocity
systems with long duct runs, especially in large
systems. In this method the static pressure is
maintained same before each terminal or branch.