Heat Exchanger Fabricators & Manufacturers Complete a Custom Heat Exchanger Project.

Bendel Tank & Heat Exchanger fabricates custom heat exchangers for many different industries and fabricators, including the piping fabrication market.  The two heat exchangers in these photos were fabricated for a piping fabricator’s project.

The piping fabrication industry fabricates custom pipes and equipment for markets like Medical Gas, Pre-Insulated Underground, Jacketed, Chemical, Process, Sanitary, Steam, Hydronic, and Plumbing.  Other industries that benefit from piping fabricators include Power Generation, Food & Beverage, Pulp & Paper, Automotive, Chemical & Petrochemical, Pharmaceutical, Refinery Piping, and Water/Wastewater Treatment.

If your company would like to learn more about Bendel Tank & Heat Exchanger and our custom heat exchanger fabrication program, please contact Bendel at 866-596-5112 or email Vince Petruccior Vivek Patel at Bendel Tank & Heat Exchanger.  We look forward to talking with you soon!

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Heat Exchanger Engineering & Storage Tank Engineering from Bendel Tank & Heat Exchanger.

The Bendel engineering and drafting teams are highly-trained, experienced and focused professionals.  Our internal system stresses definition of design, testing, fabricating, and quality control at each stage of development.

Our engineers and draftsmen are highly-trained and experienced with the following design and engineering software:

• AutoCAD: Design and dimensional layout of Storage Tanks, Pressure Vessels, Reactors and Shell & Tube Heat Exchangers.
• Compress: Mechanical design of Pressure Vessels, Reactors and Shell & Tube Heat Exchangers.
• HTRI: Thermal analysis of Shell & Tube Heat Exchangers.
• Custom “In-House” programs: Developed by our experienced engineering staff for the efficient creation of Bill of Materials and Customer Quotations.

We are frequently called upon by our clients to address unusual and challenging vessel design scenarios, and our engineers currently design to the following industry-recognized codes:

• ASME Section VIII, Div. 1 (U & R Stamps)
• TEMA
• API-650, 620 and 12F
• UL-142
• NFPA-22

The Bendel engineering team has a primary focus to design and produce best-in-class mechanical designs to meet all technical and mechanical industry standards.

Bendel Corporation has developed our Quality Assurance Program around the requirements of the ASME Code (Section VIII, Division I) for the design and fabrication of shop built Tanks, Pressure Vessels and Shell & Tube Heat Exchangers.

The Program is documented in the Bendel Quality Control Manual and is reviewed annually to ensure compliance with all of the latest revisions of the ASME Code.

If you would like more information about our Bendel heat exchanger design and fabricating program, please call us at 866-596-5112 or contact  Vince Petrucci or Vivek Patel at Bendel.

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Heat Exchanger Fabricator Has Flow Arrangement Options

We have been posting some “behind-the-scenes” and educational information about Heat Exchangers, how they work, what is the science behind them, etc.  And now we want to take a look at “flow arrangement” and how we classify flow arrangement when fabricating our Heat Exchangers.

Basically, there are two primary classifications of heat exchangers according to their flow arrangement. In parallel-flow heat exchangers (at left), the two fluids enter the exchanger at the same end, and travel in parallel to one another to the other side.

In counter-flow heat exchangers (at right) the fluids enter the exchanger from opposite ends. The counter current design is most efficient, in that it can transfer the most heat from the heat (transfer) medium.

For efficiency, heat exchangers are designed to maximize the surface area of the wall between the two fluids, while minimizing resistance to fluid flow through the exchanger. The exchanger’s performance can also be affected by the addition of fins or corrugations in one or both directions, which increase surface area and may channel fluid flow or induce turbulence.

In a cross-flow heat exchanger (at left), the fluids travel roughly perpendicular to one another through the exchanger.

The driving temperature across the heat transfer surface varies with position, but an appropriate mean temperature can be defined. In most simple systems this is the “log mean temperature difference” (LMTD). Sometimes direct knowledge of the LMTD is not available and the NTU (Number of Transfer Units) method is used.

If you would like more information about our Bendel heat exchanger design and fabricating program, please call us at 866-596-5112 or contact  Vince Petrucci or Vivek Patel at Bendel.

 

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Heat Exchanger Fouling Can be a Nightmare Maintenance Issue with Shell & Tube Heat Exchangers!

Fouling occurs when a fluid goes through the heat exchanger, and the impurities in the fluid precipitate onto the surface of the tubes. Precipitation of these impurities can be caused by:

• Frequent use of the heat exchanger
• Not cleaning the heat exchanger regularly
• Reducing the velocity of the fluids moving through the heat exchanger
• Over-sizing of the heat exchanger

Effects of fouling are more abundant in the cold tubes of the heat exchanger than in the hot tubes. This is because impurities are less likely to be dissolved in a cold fluid, because for most substances, solubility increases as temperature increases. A notable exception is hard water where the opposite is true.

Fouling reduces the cross sectional area for heat to be transferred and causes an increase in the resistance to heat transfer across the heat exchanger. This is because the thermal conductivity of the fouling layer is low. This reduces the overall heat transfer coefficient and efficiency of the heat exchanger. This in turn, can lead to an increase in pumping and maintenance costs.

The conventional approach to fouling control combines the “blind” application of biocides and anti-scale chemicals with periodic lab testing. This often results in the excessive use of chemicals with the inherent side effects of accelerating system corrosion and increasing toxic waste – not to mention the cost of unnecessary treatments. There are however solutions for continuous fouling monitoring in liquid environments with sensors measuring both fouling thickness and temperature, allowing cleaning effectiveness to be monitored and chemical usage to be minimized.

If you would like more information about our Bendel heat exchanger design and fabricating program, please call us at 866-596-5112 or contact  Vince Petrucci or Vivek Patel at Bendel.  www.bendelcorp.com

 

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U-tube Heat Exchanger Design and Fabrication from Bendel Corporation

There are several different types of shell and tube heat exchangers that Bendel designs and fabricates for clients of varying types for varying uses!  The U-tube heat exchanger is a multi-use heat exchanger that many of our clients use in their various manufacturing processes.

A shell and tube heat exchanger is a class of heat exchanger designs. It is the most common type of heat exchanger in oil refineries and other large chemical processes, and is suited for higher-pressure applications. As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle of tubes inside it. One fluid runs through the tubes, and another fluid flows over the tubes (through the shell) to transfer heat between the two fluids. The set of tubes is called a tube bundle, and may be composed by several types of tubes: plain, longitudinally finned, etc.

Two fluids, of different starting temperatures, flow through the heat exchanger. One flows through the tubes (the tube side) and the other flows outside the tubes but inside the shell (the shell side). Heat is transferred from one fluid to the other through the tube walls, either from tube side to shell side or vice verse. The fluids can be either liquids or gases on either the shell or the tube side. In order to transfer heat efficiently, a large heat transfer area should be used, leading to the use of many tubes. In this way, waste heat can be put to use. This is an efficient way to conserve energy.

Heat exchangers with only one phase (liquid or gas) on each side can be called one-phase or single-phase heat exchangers. Two-phase heat exchangers can be used to heat a liquid to boil it into a gas (vapor), sometimes called boilers, or cool a vapor to condense it into a liquid (called condensers), with the phase change usually occurring on the shell side. Boilers in steam engine locomotives are typically large, usually cylindrically-shaped shell-and-tube heat exchangers. In large power plants with steam-driven turbines, shell-and-tube surface condensers are used to condense the exhaust steam exiting the turbine into condensate water which is recycled back to be turned into steam in the steam generator.

There can be many variations on the shell and tube design. Typically, the ends of each tube are connected to plenums (sometimes called water boxes) through holes in tubesheets. The tubes may be straight or bent in the shape of a U, called U-tubes.

If you would like more information about our Bendel heat exchanger design and fabricating program, please call us at 866-596-5112 or contact  Vince Petrucci or Vivek Patel at Bendel.

 

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Storage Tank & Heat Exchanger Fabrication Quality Control Programs

Quality control at Bendel Corporation is part of the manufacturing and fabrication process. Anticipation…Intervention…Experience…Stage Reviews…our quality control program is so vitally important to our clients and our company.

The Bendel quality control process encompasses inspection, analysis, and implementation at each stage to maintain standards of manufacturing and fabrication.

Bendel Corporation has developed our Quality Assurance Program around the requirements of the ASME Code (Section VIII, Division I) for the design and fabrication of shop built Tanks, Pressure Vessels and Shell & Tube Heat Exchangers.

The Program is documented in the Bendel Quality Control Manual and is reviewed annually to ensure compliance with all of the latest revisions of the ASME Code.

Our Quality Program is maintained to satisfy our Authorized Inspection Agency (Hartford Steam Boiler) and all customer expectations. In addition to the ASME Code, Bendel also maintains certification under the National Board Inspection Code (NBIC) for vessel field repairs and alterations.

All welders employed by Bendel are required to pass stringent performance testing requirements based on ASME Section IX prior to welding on any Code or Non-Code vessel.  Please call us at 866.596.5112 or email beaver@bendelcorp.com. We look forward to serving you soon!