Candy Producer Saves $4600 in Compressed Air with EXAIR’s EFC

A few months ago, I took a phone call from a manufacturing engineer who worked at a large candy production facility here in the United States. Extra chocolate was dripping out of the candy molds onto the conveyor belt below.  Within a few hours the belt was dirty enough they would have to stop the line and clean the residual chocolate off the belt. 

The best solution I found was a 72” 316 Stainless Steel Super Air Knife. It worked great when powered at 60 psig inlet pressure. The laminar flow of the Super Air Knife was perfectly suited for this application.  The knife was mounted between the mold and the belt to help solidify and blowoff the excess drips of chocolate. There was one drawback, the Super Air Knife was not needed to blow the belt continuously and the continuous demand was not desirable during peak production.

The simple solution for this was the EXAIR Electronic Flow Control, the EFC minimizes compressed air use by turning off the air when a sensor is triggered. Since there was a 4.5-minute time gap between each mold set this was a great solution. When the photoelectric eye saw a mold, it then told the solenoid valve to open and supply the knife with compressed air for 30 seconds while the mold was open and the excess chocolate would be dripping. See the Savings calculations below;

efcapp

Without using the EFC

(* Using $ 0.25 per 1000 SCFM used)

  • 72” Super Ion Air Knife = 165.6 SCFM @ 60 PSIG
  • 165.6 SCFM x 60 minutes x $ 0.25 / 1000 SCFM = $ 2.48 per hour
  • $ 2.48 per hour x 8 hours = $ 19.84 per 8-hour day
  • $ 19.84 x 5 days = $ 99.20 per work week
  • $ 99.20 per week x 52 weeks =$5,158.40 per work year without the EFC control

 

With the EFC installed (turning the compressed air off for 4 minutes 30 seconds with a 30 second on time = 6 minutes/hour compressed air usage)

  • 165.6 SCFM x 6 minute x $ 0.25 / 1000 SCFM = $ 0.25 per hour
  • $ 0.25 per hour x 8 hours = $ 2.00 per 8-hour day
  • $ 2.00 x 5 days = $ 10.00 per work week
  • $ 10.00 per week x 52 weeks = $520.00 per work year with the EFC control 

$ 5,158.40 per year (w/o EFC) – $ 520.00 per year (w/ EFC) = $4,638.40 projected savings per year by incorporating the EFC.

EFC287x250

This example illustrates, clearly, why choosing the EFC is a good idea. It has the ability to keep compressed air costs to a minimum and saves compressed air for use within other processes around the plant. With this type of compressed air savings, the unit would pay for itself in less than 3 months.

If you would like to see how we might be able to improve your process or provide a solution for valuable savings, please contact one of our Application Engineers.

Jordan Shouse
Application Engineer
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Twitter: @EXAIR_JS

 

Energy Rebates and EXAIR Products

In case it goes unnoticed, EXAIR focuses on engineered compressed air point of use products to ensure that our customers are utilizing their costly utility as efficiently as possible.  The main benefits to purchasing EXAIR products are the support you receive from us at EXAIR, the quality of the product, the savings in compressed air, and the increase in safety.  Another added benefit is a large number of utility companies are offering rebates on the purchase of engineered nozzles, just like the Super Air Nozzles that EXAIR offers.

Many energy providers offer these energy rebates for commercial or industrial users.  Here in the Cincinnati area, Duke Energy offers rebates on items such as lighting, air compressors, engineered air nozzles, heaters / dryers for extrusion machines, energy management systems, variable frequency drives, data center equipment, even food service equipment, custom incentives, and many other items.

Duke Energy Rebate
Example of our local energy rebate offering for Engineered Nozzles

For each engineered compressed air nozzle that is installed, in order to meet the rebate requirements they must flow less than or equal to given flow rates in SCFM at 80 psig inlet pressure. The pipe sizes, flow rates, and EXAIR equivalents are shown below.

EXAIR Engineered Air Nozzle Part Number EXAIR Flow Rate @ 80 psig
#1102/#1103 – 1/8 NPT 10 SCFM
#1100/#1101 – 1/4 NPT 14 SCFM
#1108SS-NPT/#1109SS-NPT/#1110SS-NPT
All are 1/8 NPT
2.5, 4.9, 8.3 SCFM
respectively
#1003 – 3/8 NPT 18 SCFM

By just replacing the nozzles the customer saved 2.7 SCFM per nozzle.If we take an example such as the EXAIR Case Study  shown below for 1/4″ copper tube that was being used as an open ended blow off.  The copper tubes were consuming 19.6 SCFM at 100 psig inlet pressure, there were 10 machines with one line per machine operating 40 hours, 52 weeks per year.   The customer retrofitted the open pipes with a model 1100 Super air nozzle and was able to reduce the air consumption by 2.7 SCFM per nozzle.  If they were to purchase these nozzles this year, current list price for a model 1100 Super Air Nozzle is $36.00 USD, then apply for the energy rebate offered by Duke Energy and receive $20.00 per nozzle replaced.  The total savings and return on investment is shown below.

Case Study 1561
EXAIR Model 1100 Super Air Nozzle Replaces Open Copper Pipe Blow Off

10 nozzles x 2.7 SCFM = 27 SCFM  x 60 minutes per hour x 8 hours per day x 5 days per week x 52 weeks per year = 3,369,600 SCF of compressed air saved per year.

3,369,600 / 1,000 SCF x $.25 = $842.40 USD savings in compressed air per year.

Cost Savings per week = $16.20 USD

Total purchase cost is  $36.00 x 10 nozzles = $360.00 USD

Energy Rebate = @20.00 per nozzle x 10 nozzles  = $200.00 USD in rebates.

$360.00 USD purchase price – $200.00 USD energy rebate = $160.00 USD final purchase cost.

Return on investment at a savings of  $16.20 USD per week is

$160.00 / $16.20 = Less than 10 weeks pay back!

By applying for the energy rebate this customer could reduce the ROI of this air savings project from just over 22 weeks (which is still very good) to less than 10 weeks.

If you would like to learn more about whether there are Industrial energy rebates available in your area, contact an Application Engineer and let us know where you are located and who your energy provider is.

We will help you determine the correct engineered solution to save your compressed air as well as help you to apply for eligible energy rebates in your area.

Brian Farno
Application Engineer Manager
BrianFarno@EXAIR.com
@EXAIR_BF

 

EXAIR’s Efficiency Lab can Help With your Energy Audit, Quantify Savings and Provide an ROI

I recently received an inquiry from a customer to test their current air guns through our Efficiency Lab service. According to the operators, the handheld blow gun they were purchasing from a commercial retailer was too loud and complaints were rolling in.  They were also hoping to save some compressed air in the process as they were performing an energy audit at the same time.

Commercial Air Gun w/ Cross Cut Hole
Commercial Air Gun w/ Cross Cut Hole

Cross Cut Hole Nozzle
Cross Cut Hole Nozzle

The gun they sent in looked fairly similar to our Precision Safety Air Gun but it did not have an engineered nozzle on the tip of it.   Instead, it was simply a cross cut hole in a piece of material.   The air inlet to the gun was a 1/4″ NPT just like our Precision Safety Air Gun, the extension on the gun was slightly longer, the only significant variance I saw was the tip.

EXAIR Model 1410SS-CS
EXAIR Model 1410SS-CS

The Model 1110SS Nao Super Air Nozzle and Chip Shield
The Model 1110SS Nao Super Air Nozzle and Chip Shield

To try and get as much information as possible I measured the O.D. and I.D. of the extension, the hole size was approximately .140″.  I measured the extension on our Precision Safety Air Gun just to see what is different, it came in at the same size.  So, I flow tested the competitive blow gun with their tip on it and came up with air consumption of 12.69 SCFM, noise level of 92 dBA at 3′ away, and a blowing force of 11.5 oz at 80 psig.   I then measured the same attributes of EXAIR’s model 1410SS-CS Precision Safety Air Gun at 80 psig inlet pressure.  The model 1410SS-CS measured 8.3 SCFM, gave 8.1 ozs of working force, and only produced a 75 dBA sound level from 3′ away.

The sound level reduction was a total of 17 dBA which is below the OSHA standard for allowable noise level exposure, as well as reduced their air consumption by 4.39 SCFM.  That is almost a 35% reduction in their compressed air usage per gun replaced.  After seeing these levels of reduction the customer had more than enough information to provide management with in order to replace the blow guns not just for noise level reduction but also because it will reduce air use and save money. A clear supportive role in their energy audit.

If you would like to discuss how EXAIR can provide some free force, flow, and noise level testing for your facility, please contact an Application Engineer or check out the Efficiency Lab page on our site.

Brian Farno
Application Engineer Manager
BrianFarno@EXAIR.com
@EXAIR_BF