Enclosure Cooling for Commercial Bakeries – Easy As Pie


The two most important characteristics of creating a great tasting pie are the filling and the crust.  For the filling, fruit is mixed with sugar, cinnamon, honey and other spices (depending on the type of filling) in a large sauce pan. Ingredients are heated and mixed to combine the flavors for the filling.

In today’s modern lifestyle, frozen foods have played a major role in providing convenience to customers.  Pies – a family fall favorite, often take time that many families do not have. This is the time of the year where kids are back to school, parents are running all over doing drop-offs and pick-ups, rushing to work; taking the time to bake or make a full meal is often difficult.  Large industrial bakeries can manufacture roughly 200,000 frozen pies a day.  There is a high demand in this modern age for this aspect of convenience.

This process requires automation components such as VFDs in large electrical control panels to operate the system. Heat is a by-product of this process and Pfannenberg’s PWS Air to Water Heat Exchangers are ideal for cooling electrical components. Pfannenberg’s Air Water Heat Exchangersutilize chilled water, that is readily available, and an internal fan to provide cooled air preventing critical electronics from overheating. These units are particularly adapted for harsh environments like bakeries when there’s flour everywhere.

 

These pies are then moved to the depositing machine, where the filling is then dropped into the pie sheets.  The lid of crust is then placed on the filled fruit pie.  These lids are mass produced and “forked” or sealed to give that touch as if it was just like our mothers or grandmothers homemade pie. These top crust lids help seal in the filling when the pie is being baked at home.  Once sealed, the pies are moved to a blast freezer for rapid chilling.

Once chilled the pie is then moved to be packed and shipped off to local grocery stores.To make that flakey-buttery crust, shortening, flour, and other ingredients are mixed together in a large industrial mixer.  When the dough is done being mixed, the dough is compressed into equal sized squares and dropped into baking pie sheets.  Here, they move along the process and the dough squares are pressed down on the pie sheets to form the bottom crust layer.

The manufacturing processes of frozen pies are a delicate procedure. Temperature control of the equipment and the product is important to producing a flavorful, flakey, and scrumptious pie crust. So what will it be?  One slice or the entire pie?  Ice cream or whipped cream? Next time you are enjoying a piece of pie, be sure to appreciate the process it takes to produce such a delicate indulgence!


Click Here to download the Bakery Air to Water PWS Case Study.


Join us at ProFood Tech 2017 which will take place in Chicago, IL from April 4-6, 2017!

Be sure to stop by Booth #1847 to learn more about our products! 


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Topics: Air Water Heat ExchangersThermal ManagementNorth AmericaFood & Beverage,Bakery

The 6 Step Guide to Choosing the Best Chiller for your Application

Heat is a single common by-product of today‘s manufacturing machines that include the advanced automation technology required for both high speed operation and high precision. Components such as spindle motors, variable frequency drives, laser and x-ray sources all require cooling to operate properly and reliably – most often in the very adverse manufacturing environments.

With manufacturing space at a premium, machine packages have become smaller and liquid cooling has emerged as the most efficient and economical means of removing process heat.Liquid cooling is especially well adapted to hot, dirty environments, where it provides a method of removing the heat from the machine and not contributing additional heat back into the environment.


A quick guide to choosing the correct chiller:

As each industrial environment is different, Pfannenberg designed a 6-steps guide to help you select the proper chiller for your application:

Step 1: Determine the Heat Load

It is important to determine the heat load of your application to ensure the chosen chiller is big enough for the intended application.There are several ways to determine the heat load (in BTU) but understanding the process is essential to calculating an accurate heat load.


Step 2: Determine the Coolant Type, Temperature & Flow Rate

When the heat load is known, the next step is to determine the coolant, its target temperature and the flow rate that the chiller must provide to the process. This is determined by the method from which the heat is transferred from the process to the coolant and the type of coolant being used. For example, water has different characteristics than oil.


Step 3: Identify Installation Environment

In what environment the chiller will be installed? Indoor applications for example can see high temperatures and dirty atmospheres, while outdoor installations can experience both low and high ambient temperatures. This can effect chiller sizing and require accessories such as air filters, sump heaters, etc.


Step 4: Use Chiller performance curves

Now use the chiller performance curves available to select a chiller model that meets or exceeds the required capacity based on the chilled water supply temperature and the highest expected ambient air temperature. Consideration should be given to the safety margin of the application with respect to available frame sizes to maximize the value of the chiller selection. Find all Pfannenberg Chillers Performance Curves on our New Thermal Management Catalog.


Step 5: Check Pump performance curves

Check the pump performance curves available to ensure that the pump will provide enough pressure at the design flow rate to satisfy the application. Some liquid cooled systems have small coolant flow paths or longer distances that can have higher than average pressure losses.


Step 6: Final Selection

Finally, consider that the remaining application requirements such as power characteristics, control options, footprint, agency listing, color, etc. are met by the selected standard Pfannenberg chiller. Choosing a standard chiller will bring you greater reliability, easier service with common spare parts and global support.

>> Click here to download the PDF version of this guide.


Pfannenberg offers a versatile range of packaged chillers, ranging in sizes from less than ½ Ton to 30 Tons insuring the proper capacity available for most applications. These packaged chillers are ready to use requiring only piping and power to install as part of your solution for process cooling applications – we‘ll even provide the coolant. Ethylene & Propylene Glycol coolants, with proper corrosion inhibitors are available in a variety of packaging options – both full strength and pre-mixed. Each chiller model includes the pump, tank, refrigeration system and controls required for simple installation and reliable, efficient operation.

Our knowledgeable applications staff is always on hand to discuss the application and to make sure that a proper selection is made. With our many available equipment options we can easily customize our standard chillers to meet specific application requirements.

Contact our engineering team for more information!

Topics: Chillersliquid cooling

Understanding the Different Types of Liquids Used in Chillers for Cooling Processes

With manufacturing space at minimum, machine packages have become smaller and liquid cooling has emerged as the most efficient and economical means of removing process heat. Chillers often are the only method of providing sustainable efficiency & reliability performances in “hostile” environments.

A chiller uses a refrigeration cycle to remove the collected heat from a circulating liquid. As the liquid moves through a system of tubes and pipes, it absorbs the heat generated by equipment and processes. This generated heat is then transferred by the liquid back to the chiller where it is dissipated. Fluid is cooled and sent back into the system.

>> Click here to learn more about Closed Loop Liquid Cooling Solutions.

But even if you determined that Liquid Cooling is the right solution for your environment, how do you know which heat transfer fluid you should use?

Liquids Used to Cool Your Processes

Pfannenberg process chillers offer different types of liquids to cool your processes as Water/Glycol mix, Water, and Specific Oils. Pfannenberg always recommend to use the water/glycol mixture as it’s the best way to “Protect Man, Machine and the Environment”.

1/ Glycol-Water Mixture

It is recommended to use a Water-Glycol
mix when freeze protection is needed, for example if the chiller is placed outdoors.

Ethylene & Propylene Glycol coolants, with proper corrosion inhibitors are available with Pfannenberg’s Packaged Chillers – both full strength and pre-mixed.

We typically recommend the use of Propylene rather than Ethylene Glycol, even though Propylene has less heat transfer capability, as it is more environmentally friendly and much safer to use.

Using Glycol for indoor applications is also recommended as it deters scale and corrosion in the system and provide some lubrication to the chiller pump while protecting metals. Outdoor applications need more Glycol depending on the maximum low ambient the chiller may see. The addition of Glycol does bring capacity of the chiller down slightly.

The Glycol to Water ratio is different depending on the customer’s coolant temperature needs as well as ambient temperatures being indoor or outdoor applications.

2/ Water

Depending on your installation, water cooling can be a good alternative as it is an economical and energy efficient solution. Water can be used from a local source (city water), but it is recommended to make sure that the water used is not high in mineral content which can cause corrosion or clog fluid channels. To avoid damaging the components, filtration is always encouraged.

 

Other types of acceptable water are: Reverse Osmosis Water (RO) and Dionized Water (DI)

  • RO Water is a purified water where 90-99% of most contaminants are removed but not all ionically disolved substances.
  • DI Water is water that is passed through a DI reaction chamber and has all its ions removed so all the impurities, salts or minerals that can cause corrosion are extracted.

Deionized water can sometimes be requested by customers, but it can still be damaging to certain materials and cause corrosion due to its high purity level. Indeed, due to the lack of ions, the water wants to attract ions from everything it touches. DI systems therefore require acid and caustic for regenerations and a neutralization system – which uses harsh chemicals – for the wastewater.

If highly pure water is not mandatory, RO water is a better option as the filtering process is not as defined as DI water.

In all cases, it is always recommended to contact a water treatment specialist for supervising or performing the installation and operation of water purification equipment.

3/ Oil

Cooling with oil is dedicated to very specific applications in which the process liquid is an oil or an emulsion with a high viscosity. Pfannenberg’s EB Chillers allow the maximum cooling capacity in the smallest possible footprint.

These chillers are designed to handle the oil entering the evaporator at higher temperatures than in typical processes. This solution is mainly used for recirculated cooling of machinery, hydraulics, automation components, etc.

 

 

Properly selected equipment is key to cooling efficiency

Whatever your industry, selecting the best packaged chillers to meet the demanding requirements of your industrial applications can be complicated. For that reason, Pfannenberg designed a 6 step guide to help you select the best chiller depending on your environment, process and type of application.

Click on the picture to open the PDF or use this link!

 


Have a question regarding which equipment is best for your application? Ask Us Here.


Topics: Enclosure CoolingPackaged ChillersChillers

Pfannenberg Signaling Alarms Notify Personnel and Community of Chlorine Gas Leak

Chlorine Gas Detection Alarm System Works as Designed

In 2015 Pfannenberg provided signaling notification appliances (alarm horns and strobes) to the North Tonawanda Wastewater Treatment Facility as part of their new Gas Detection Alarm System. On the evening of Tuesday, September 13, 2016 there was a very small chlorine gas leak. Pfannenberg’s PATROL Signaling Alarms were triggered through the system notifying plant personnel and surrounding area. The alarms could heard up to a mile away from the facility.

>> All clear given following chlorine leak (VIDEO)


Even though the leak was very minor, everyone was pleased to know that the system worked as specified, providing adequate warning. Hopefully there will never be a larger leak, but if there were then it is reassuring to know that the personnel and community will have plenty of advanced warning to the potential hazard.

Click Here to check out our case study about this project.


Topics: Industrial Safety & Signaling SolutionsWastewater TreatmentGas DetectionAlarms