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HVAC for Cleanroom Facilities
A.
Bhatia
Overview
Although the idea of a
cleanroom may seem right out of science fiction, clean and controlled
environments are actually used by a wide range of industries. From their more
obvious uses in medical facilities to their necessity in integrated circuit
manufacture, cleanrooms provide an essential role in modern production and
research.
At its most basic level, a
cleanroom is just what it sounds like: an area kept free of contaminants.
There are 5 key elements for
the control of airborne particulate matter:
| 1. |
Preventing
entry of particulate matter - This is accomplished by filtration of the
air entering into the cleanroom. |
| 2. |
Purging of particulate matter - The air handling system
changes the air in the room and thus removes particulate matter generated
within the room. |
| 3. |
Prohibiting the generation of particulate matter -
Cleanroom materials and finishes are selected for their resistance to
particle generation. |
| 4. |
Protecting the product from impact and settling of
particulate matter - The low level of particulate matter in cleanrooms
contains a majority of the smaller size particles, which settle out very
slowly. These smaller particles have a very long “life” in the air.
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| 5. |
Providing an area for the cleaning of parts and personnel -
Everything entering the cleanroom is cleaned, so that as little
contamination as possible is added to the room atmosphere by transfer from
dirty objects. |
Having given due
consideration to the above factors, it is possible to achieve and sustain the
desired cleanliness goals. This 6-hr course provides an overview of cleanrooms
and discusses the key HVAC design aspects applicable to cleanrooms.
The
student must take a multiple-choice quiz consisting of thirty (30) questions at
the end of this course to obtain PDH credits.
Specific Knowledge or Skill Attained
At the conclusion of this
course, the student will be able to:
| 1. |
State the four fundamental rules that apply to cleanrooms |
| 2. |
Define contamination and list the various sources of
contamination |
| 3. |
List the various classifications of cleanrooms in
accordance with Fed standard 209 and ISO 14644 standards |
| 4. |
List the key differences between cleanroom HVAC and
conventional systems HVAC |
| 5. |
State the four basic mechanisms of filtration and describe
the methods of testing online filters |
| 6. |
State the specifications of HEPA and ULPA filters |
| 7. |
Describe the air velocity and the air change requirements
for different cleanliness classifications |
| 8. |
Describe the design approaches for unidirectional and
non-unidirectional air distribution |
| 9. |
State the methods for achieving temperature and relative
humidity requirements |
| 10. |
Describe the cleanroom pressurization requirements and its
impact on energy use |
| 11. |
Describe the energy conservation approaches and new
developments applicable to cleanroom technology |
| 12. |
Describe the cleanroom architectural requirements and the
interaction interface |
Course
Click on the link
below to view the course prior to taking a
quiz for PDH credits.
HVAC for Cleanroom Facilities
(1.2 MB)
To obtain PDH credits for this course, you will need to take a quiz for
credit. Click on the link below.
(To take the quiz,
your web browser must be set to accept cookies. See how to
check your cookie settings.)

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