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The Spring Golf Outing will be at Diamond Players Club on April 22nd.
April Meeting
Date:
Thursday April 7th, 2005
Time:
5:00 Board Meeting
6:00 to 6:45 Social Period
6:45 Dinner Begins
7:00 Presentation
Location:
Dubsdread
Topic: Design Build Panel Discussion
We are very excited to announce our April panel
discussion. Four industry leaders will participate and discuss with us their
experiences in the realm of design-build. We will talk about the pros and cons
of the design-build method of construction. The panelists will share with us
their experiences in this construction methodology. Particular emphasis will be
placed on mechanical design-build do’s and don’ts.
Panelists:
Mark Kirby, P.E. –
Principle Mechanical Engineer – TLC Engineering for Architecture
Mr. Kirby is a LEED™ Accredited Professional with more than
20 years’ experience in mechanical engineering design, production, project and
facilities management. Mark’s background includes employment with a national
controls company, a large national design build mechanical contractor and a
national Engineering/Architectural/Construction company. Mark is a graduate of
the University of Austin.
Bruce Holmes –
Executive Vice President - Welbro
Mr. Holmes has 20+ years
and a wide range of experience in Contracting and Development. He has managed
the construction of educational, hospitality, healthcare, commercial and
industrial projects. As a Developer, he has participated in the development and
construction of over 350 homes and condominium units. He is a Certified General
Contractor in the State of Florida and Director of Associated General
Contractors of Mid-Florida.
William C. Weinaug,
P.E. - Executive Vice President - GRG Inc.
Mr. Weinaug has over 25 years of experience specializing in
mechanical design for entertainment and hospitality facilities.
This list includes projects for Disney, Universal Studios and Busch
Entertainment. Bill is a LEEDTM Accredited Professional. He is a
member of the Design Build Institute of America, the National
Society of Professional Engineers, the American Society of Plumbing Engineers,
and the Institute of Noise Control Engineers.
Russ Alcorn, P.E. -
Operations Manager – Hensel Phelps Construction Co.
Mr. Alcorn’s professional
career in construction began in 1978 upon his graduation from Southern Illinois
University. He is a Registered Professional Engineer and holds his General
Contractor license in the U.S. Virgin Islands. He received the Designated
Design-Build Professional Certification through the Design-Build Institute of
America. As Operations Manager for Hensel Phelps Construction Co.’s Southeast
District, Mr. Alcorn is responsible for projects in the southeastern states and
the Carribean.
Please register by
Wednesday, April 4th, 2005. Don’t miss out on this great event!
Last Month's Program:
Thanks to all of those who attended our meeting last Thursday.
We really do value your feedback so please take 60 seconds to fill out this
survey:
http://www.surveymonkey.com/s.asp?u=12882663049
By: Todd Moore, P.E.
President Elect & Programs Chair
We had an exciting month in March. In addition to our normal September
Meeting we had the Third Annual Shrimp Boil, and yes I did say September.
We originally were not going to have a meeting in March due to the Shrimp Boil
but since we cancelled the September meeting due to Hurricane Frances, we
re-scheduled it for March. It appears that our original plans to not have
the meeting in March were good based upon the very light turnout for the
meeting. You missed a good presentation if you did not attend.
The Shrimp Boil went very well this year. There was a good turnout and
it appeared that everyone was enjoying themselves. I will try to get some
photos from the event posted on the web site shortly.
Thank you to all of the people who volunteered their time and/or goods to
make this event a success. Without the volunteers effort, this event would
be impossible.
Many people have inquired about placing adds regarding employment in the
ASHRAE DEWPOINT. While policy forbids us from placing advertisements from
companies other than a business card ad, we will accept help wanted ads.
Please contact me if you are interested in placing an ad.
 Damon
Lynn
President
HFC’s and
the Future Part 1
by Greg
Romanczyk
The phasing out of CFC refrigerants in 1995 due to
environmental concerns was a big step towards the future of refrigerants. These
two main concerns were global warming and ozone depletion. Global warming,
depending on the system efficiency includes total emitted gases into the
atmosphere. The second is ozone depletion which depends on the refrigerant type
in the system. However, these concerns are only 2 of the many factors in
determining the best choice for the future of refrigeration. No matter how
terrific the choice may be environmentally, if there is not enough of in 10 or
20 years, or the risk/cost of its usage is high, the choice for the process may
be unfeasible.
Focusing on cost, potential phase out and safety, the
best choice would be those of HFC refrigerants. Currently, these stable
refrigerants are the most widely used, and in highest demand, with an ample
supply. Also looking at the fact the industry phased out CFC’s and is moving to
a chlorine free future, HFC’s are focused on being the most viable long term
solution.
Sure, other alternative refrigerants such as ammonia
lead to better environmental criteria alone, but economics, energy and safety
play a big role. Ammonia systems work well for industrial, petrochemical and
pharmaceutical processes where its future outlook is very promising but in
building HVAC processes it does not. Ammonia refrigeration systems don’t use
ammonia and water mixed. It uses anhydrous ammonia which is highly toxic, and
if leaked would kill the occupants of a building. Also, extremely large,
expensive machinery, high maintenance, and urban use restriction limit its
choice for investment.
Therefore, in order to maximize and improve the use of
HFC’s, emission reduction processes are being investigated. Future articles
will focus on these options as well as a cost analysis associated with the
process.
 Greg Romanczyk
CTTC Co Chair
VRV creates
various design options
By Robert J. Egan
VRV or Variable Refrigerant Volume systems are
a fairly new idea in the world of HVAC, well sort of. Some of this technology
has been used in Europe for a few years now with a great deal of success, but
has yet to catch on big in the U.S. The process is a simple as it sounds, using
a variable volume of refrigerant through a terminal unit to accomplish space
conditioning, similar to using chilled and hot water.
The VRV system uses an intelligent
inverter-driven compressor. This technology enables the output of the outdoor
unit to be modulated by the cooling or heating demands of the zones it
controls. These systems can be manufactured in either heat pump or heat
recovery formats and can have as many as 10 individually controlled indoor units
of varying capacities. Depending on the system design, the total connection
ration can approach 130% of the outdoor unit capacity; as when using a heat
recovery system for instance.
An inverter heat pump system allows for either
cooling or heating in all the zones connected to it. If a particular
application requires both heating and cooling to occur an inverter heat recovery
system can provide just that. The VRV inverter technology uses a variable
proportional integral control system. This system gives added control over the
rotational speed of the compressors, which allows the amount of refrigerant
flowing in the system to vary depending upon fluctuating needs. This will
deliver maximum efficiency during partial load conditions by abbreviating the
control steps into smaller units, providing precise temperature control in all
zones.
Advantages of systems like this are greater
flexibility when designing a DX system. The high pressure piping allows for
greater run lengths which allow you to hide your outdoor units a little better.
In addition, refrigerant piping is substantially smaller than chilled water
piping which allows you to run it in those tight ceiling spaces easier or hide
it in a wall. In addition, some manufacturers are using refrigerant R-410a,
which can score you some of those pesky LEED points. If full advantage of this
type of system is taken, a few other LEED points can be tacked on for
controllability, indoor thermal comfort and Minimum energy performance.
The major hindrances of systems like this are
that there are limitations on how much capacity can be connected to an outdoor
unit, roughly 10 tons or so. Also, while the piping can be run much further,
you still have a much shorter run than on a chilled water system. These
systems, however can be greatly utilized when designing residential and small
commercial applications.
 Robert J. Egan
ASHRAE - Central Florida Chapter
CTTC Co-chair (technical)
Dues
Please check the status of
your ASHRAE dues and remit if due or overdue. You should be getting a call if
you are on the list of non-paid dues members.
Forms and Information
If you need forms or
information on member status, please contact me at
bcarlock@bellsouth.net
Thank you for your help,
Bill Carlock
Membership Promotion
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