What’s new … CFD (more)

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This is an update from Eric Haak: Just a quick note on what I saw at the fabrication shops over the weekend.

The situation is getting more interesting at the fabrication shops. I stopped by during my usual Saturday drive-by and noticed two new Ford F-350s parked outside—one in the front and one in the back. Some people had commented on the last post saying this location only does lights, but I’m not sure if that’s accurate. To clarify, I included a photo of the sign out front, which clearly states they do full custom fabrication here. I also got a clearer shot of the unit, confirming it's a 6-7-6 model. The turret no longer has any wrapping around it, which is a bit different from before. I tried to get a better look at the turret, but I couldn’t get close enough without stepping onto the company’s property, which I didn’t want to do.
Previous post is HERE.
Chicago Fire Department turret wagon

CFD Turret Wagon 6-7-6. Eric Haak photo

Chicago Fire Department turret wagon

CFD Turret Wagon 6-7-6 parked at the fab shop. Eric Haak photo

Chicago Fire Department turret wagon

One of two CFD chassis at the fab shop. Eric Haak photo

 

Chicago Fire Department turret wagon

The second of two new chassis. Eric Haak photo

Tri-Angle Fabrication & Body Co

Eric Haak photo

I think it's worth noting that these vehicles look like they're being prepped for something bigger. Maybe new units are coming down the line, or maybe they’re just doing some major repairs. Either way, it’s definitely a sign that things are moving forward at Tri-Angle Fabrication. I’ll keep an eye on it and share more updates as I get them.

Heat Exchange Unit

Heat exchange units, also known as heat exchangers, are devices designed to transfer heat between two or more fluids without mixing them. They are widely used in various industries, including HVAC, power generation, chemical processing, and refrigeration. Below is a classification of heat exchange units based on their design and operation:

1. Based on Flow Arrangement

  • Parallel Flow (Co-current Flow):

    • Both fluids flow in the same direction.

    • Temperature difference is highest at the inlet and decreases along the length.

  • Counter Flow (Counter-current Flow):

    • Fluids flow in opposite directions.

    • Maintains a more uniform temperature difference, leading to higher efficiency.

  • Cross Flow:

    • Fluids flow perpendicular to each other.

    • Commonly used in air-cooled heat exchangers.

      2. Based on Construction and Design

      • Shell and Tube Heat Exchanger:

        • Consists of a series of tubes enclosed in a shell.

        • One fluid flows through the tubes, and the other flows outside the tubes within the shell.

        • Suitable for high-pressure and high-temperature applications.

      • Plate Heat Exchanger:

        • Uses thin, corrugated plates stacked together to create channels for fluid flow.

        • Compact design with high heat transfer efficiency.

        • Ideal for low to medium-pressure applications.

      • Plate and Frame Heat Exchanger:

        • A type of plate heat exchanger with a frame to hold the plates together.

        • Allows for easy cleaning and maintenance.

      • Plate-Fin Heat Exchanger:

        • Uses fins sandwiched between plates to increase surface area for heat transfer.

        • Common in aerospace and cryogenic applications.

      • Spiral Heat Exchanger:

        • Consists of two spiral channels wound around a central core.

        • Compact and efficient for handling viscous fluids or slurries.

      • Double Pipe (or Hairpin) Heat Exchanger:

        • Simplest design with one pipe inside another.

        • Suitable for small-scale applications or high-pressure scenarios.

          3. Based on Heat Transfer Mechanism

          • Direct Contact Heat Exchanger:

            • Fluids come into direct contact with each other.

            • Example: Cooling towers.

          • Indirect Contact Heat Exchanger:

            • Fluids are separated by a solid barrier (e.g., tubes or plates).

            • Example: Shell and tube, plate heat exchangers.

          • Regenerative Heat Exchanger:

            • Uses a heat storage medium to transfer heat between fluids.

            • Example: Rotary regenerators or fixed-matrix regenerators.

              4. Based on Application

              • Air Cooled Heat Exchanger:

                • Uses air as the cooling medium.

                • Common in power plants and refineries.

              • Liquid Cooled Heat Exchanger:

                • Uses liquid (e.g., water or oil) as the cooling medium.

              • Condensers:

                • Converts vapor into liquid by removing heat.

              • Evaporators:

                • Converts liquid into vapor by adding heat.

              • Boilers:

                • Generates steam by heating water.

                  5. Based on Phase Change

                  • Single-Phase Heat Exchanger:

                    • Both fluids remain in the same phase (liquid or gas) throughout the process.

                  • Two-Phase Heat Exchanger:

                    • Involves a phase change (e.g., condensation or evaporation) in one or both fluids.

Heat Exchange Unit,Heat Exchange Units,Heat Transfer Btu,Heat Exchange Units Home

Siping Juyuan Hanyang Plate Heat Exchanger Co., Ltd , https://www.tj-heatexchange.com