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"How long has Enercon been in business?" Since 1989. "What is Enercon's background in the 'fixed orifice' field?" Enercon
has installed thousands of its fixed orifice units since 1989. More than
180 plants have been completely converted (all conventional traps replaced).
A growing number
of Fortune 1000 plants that originally approved us to solve
specific steam-related problems are converting in stages.
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| "In
what industries has your system been installed?"
The
petrochemical, lumber, plating, chemical, paper, packaging, pharmaceutical, food,
institutional and other heavy steam users. The 180+ plants
completely converted include 38 for a $30 billion a year petrochemical
company. "What type of applications?" Thousands of Enercon assemblies are operating efficiently on tracing lines, unit heaters, humidifiers, drip legs, submerged coils, heat exchangers, jacketed coils and other applications. On completely converted plants, Enercon has replaced, on average, 99% of existing conventional traps.
"Why
would a major company change from conventional traps to Enercon?" In
today’s volatile economy, everybody is looking for ways to cut bottom
line costs. We’ve proved
our system will save fuel and eliminate trap maintenance - without a big
capital investment. Companies
that come to us with specific steam-related problems usually end up
converting their entire plants.
How
do they evaluate your system? Major
companies have typically conducted their own lab and field tests before
committing to us. However, an
increasing number are opting not to ‘reinvent the wheel.’
Many install our system based on the results we’ve generated - or
are generating - for their competitors.
What
are the results? Customers
typically report 10%-25% fuel savings, virtual elimination of steam trap
maintenance and solution of problems such as low and inconsistent
temperatures, trap-related pressure drops, high back pressure and water
hammer. (See reference
letters and linkup to magazine articles in the web site).
What
does that mean in terms of fuel and maintenance dollars? As
reported in trade magazines, the Enercon System cut annual fuel costs
$108,000 and trap maintenance $20,000 in a 35 psi, 600-trap steam system.
That’s a simple payback of less than a year, or eight R.O.I.’s
since 1996. Our system
has consistently yielded similar results (relative to pressure and trap
population).
What
about higher pressures and larger trap populations? According
to the Department Energy ‘s ‘Energy Tips’ (6-99), ‘if your
distribution system includes more than 500 traps, a steam trap survey will
probably reveal significant steam losses.’
The bulletin points out that in a 150 psi system a single failed
1/8” orifice trap will lose $2988 of steam in a year (8760 hrs).
On that basis, a 1000-trap system with a 10% trap failure rate
wastes almost $300,000 in steam annually.
What
if there’s a first-rate maintenance plan? The
bulletin says a 150 psi trap system requires weekly to monthly trap
testing to maintain a trap failure rate of less than 5%.
So testing a 1000-trap, 150 psi system every week/month will hold
annual steam losses to less than $150,000 (not including losses from
leaking but operational traps). Most
production and maintenance people tell us this level of testing is
unrealistic, that traps are a low priority, changed on an ‘as need’
basis. They have to
concentrate on the more critical projects.
"What if there's essentially no maintenance program?" In systems not maintained for 3-5 years, says the bulletin, ‘15% to 30% of the installed traps may have failed.’ |
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"Any specific customer-generated numbers to back this up?" The country's largest, privately-owned plater eliminated a 30% trap failure rate, cutting annual trap maintenance costs on its 600-trap, 35 psi steam system by $20,000 (President & CEO Magazine Article, Nov/Dec 2001). A major petrochemical customer calculated the monthly cost of maintaining conventional steam traps in one of its plants (500 traps, 150-psi), in the following chart:
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| "We
understand orifice traps can't handle varying loads."
THE
JOB
OF A TRAP is to keep steam in the system and get rid of condensate
that forms continuously as steam gives up its latent heat and condenses.
Water in a steam system reduces heat transfer and causes erosion,
corrosion and water hammer. It is critical to purge it quickly and
efficiently. MECHANICAL
TRAPS
open in the presence of condensate and close in the presence of steam.
The open/shut mechanism is activated by internal floats, buckets,
bimetals, bellows or discs. On 24-hour-a-day applications,
mechanical traps cycle several times a minute or a couple of million times
a year, resulting in wear and leakage. Mechanical traps have about a
3-5 year lifetime. WITH ENERCON’S ONE-PIECE FIXED ORIFICE UNIT, steam traveling at the speed of sound continuously forces much slower condensate (about 30 mph) through a precisely sized hole, blocking steam from escaping. The Enercon unit is sized to handle 100% of the condensate load produced by a particular application. At 100% capacity, an accurately sized orifice device loses no steam and backs up no condensate. Every condensate load varies somewhat and there is a common perception that when the load drops below 100% capacity, orifice devices lose inordinate amounts of steam. ACTUALLY,
THE OPPOSITE IS TRUE.
When the load drops below 100% capacity, the orifice passes a violently
turbulent mixture of equivalent
volumes of steam and water, a well-known phenomenon called
two-phase flow. Since condensate is several hundred times denser
than steam, steam loss is negligible. FOR
INSTANCE, IN A
100-psi system producing 375 lbs/hr condensate, an accurately sized
Enercon unit loses 1.76 lbs/hr steam if load drops to 25% of capacity,
which it will do only sporadically. At 100 psi, say D.O.E. and trap
company ‘Leaking Steam Trap Discharge Rate’ charts, a failed
conventional trap with a 1/8” internal orifice loses 52.8 lbs/hr. Hampton Affiliates, a leading lumber company which converted seven mills to the Enercon system in 2003-4 says: "Our operations are all zone control, so we have a constant variable load situation. (Enercon) traps perform with excellence in this type of environment." (Timber Processing magazine July/Aug. 2004) TO ACHIEVE LESS THAN A 5% TRAP FAILURE RATE, monthly to quarterly mechanical trap inspections are recommended for 100-psi systems, says The Department of Energy (Energy Tips - 6-99). For high pressure systems (150 psi and above), weekly to monthly inspections are recommended. MECHANICAL
TRAPS LEAK. ‘Even for companies with annual test-and-replace
programs,’ reports Textile World (February ’02), ‘studies show the
average trap has been leaking for six months before it is replaced.’
ENERCON UNITS ARE PERMANENT. Enercon units in plants converted as long as 15 years ago have not needed a replacement or lost condensate removal efficiency. We recommend our units for applications where the load may drop as low as 25% of capacity, although sources such as the U.S. Naval Facilities Engineering Command Supplements (10-90 & 1-92) say ‘a fixed orifice sized for a 100% load operates efficiently down to a 10% load.’ Enercon has replaced an average 99% of the mechanical traps in the 190+ plants it has completely converted since 1989. |
"Life expectancy of the Enercon condensate removal units?"
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stainless steel units are permanent, and have a lifetime warranty.
Trap repair and replacement is virtually eliminated. Systems installed as
long as 15 years ago have not needed a trap replacement, or lost condensate
removal efficiency.
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Copyright©
2004 Enercon Systems Co. All Rights Reserved.