Flow circuit plate pattern as a type of steam heat exchangers
Heat exchangers flow circuit plate pattern represent one of the types of steam heat exchangers and consist of a package of metal sheets provided with holes for the two fluids. The placement of the plates is such that each one takes the form of a channel.
The configuration of these plate heat exchangers is such that each fluid circulates through alternate channels. Effective heat transfer takes place between two adjacent channels and the ripple of the plates causes turbulence in the fluid while supporting the differential pressure.
Division of flow circuit plate pattern
Depending on the method common in the circuit plate pattern, the groups into which plate heat exchangers can be divided are as follows:
- Firstly, plate heat exchangers with gaskets (or plate and frame heat exchangers)
- Secondly, thermoelectric plate heat exchangers.
- Finally, fully welded plate changers.
The invention of exchanger plates
The exchanger flow circuit plates pattern together was invented around 1930. At that time, they were first common in the food industry, where an easy heat exchanger cleaning was necessary to maintain the hygiene requirements of this sector.
The first steam heating plate exchanger appeared around 1940 and was common as a milk pasteurizer. Over many years, the plate heat exchanger concept appeared as a success and new innovative products appeared.
The vacuum welding technique
In the late ‘70s, the exchangers' flow circuit plate pattern, uses vacuum welding techniques to join the plates. The next step in the development process was taken in 1994 when the plate changers were fully welded.
The flow circuit plate pattern has laser welding plate heat exchangers. Moreover, this forms a very tight construction. Today, plate heat exchangers are common in many services in chemical processes, HVAC, food, marine, and refrigeration applications.
Plate Heat Exchanger Design Calculations
Circuit plate pattern heat exchangers are easy to select using the software. This makes it easy to optimize your steam heater design in any service. It can handle wet, saturated, and reheated steam as well as almost any fluid on the secondary side.
Fluid velocities in the connections and channels, as well as the leaving condensate temperature, calculate. The steam heater design is easy to choose to suit all types of control methods. The flow breakpoint is also easy to find.
Beneficial information about flow circuit plate pattern
To get a good design of flow circuit plate with steam as the hot fluid, the following information should be remembered:
- Firstly the inlet, and outlet temperature of the fluid to be heated drop secondary side.
- Secondly, the vapor pressure drop is not important.
- It is important to know if the fluid contains dirty substances, or if the fluid itself is dirty.
- Moreover, design pressure and temperature, pressure, types of connections; flanges, ducts, etc.
- The control method has great weight and influence on the design and type of exchanger.
- Also, desired to leave condensate temperature.
- Moreover, temperature influences the design of the heat exchanger,
- Finally, particularly when using the primary condensate control valve with ranges 2.
Design of flow circuit plate pattern
The design of the steam flow circuit plate pattern exchangers comes with software developed by their manufacturers. This software for the design of steam plate heat exchangers can handle wet, saturated, and reheated steam.
The design of the steam plate changers is easy to choose to suit all kinds of control methods. However, to get good flow circuit plate pattern heat exchangers, it is essential to keep the following information.
More details about flow circuit plate pattern
To get into the details of all circuit plate pattern interruption symptoms in steam systems, let's take a closer look at them one by one:
- Firstly, the temperature of the fluid leaving the exchanger is less accurate than required.
- Secondly, the output side of the heat exchanger temperature stratification takes place.
- Finally, the most evident in heating batteries takes place outside of the exchanger.
For instance, we can detect it in the heating coil illustrated in the previous figure. The design allows access to the surface of the flow circuit plate pattern. Usually, it comes through an access panel or door on the side of the ducts.
There are three common heat transfer modes:
- Conduction
- convection and
- radiation
Conduction is the transfer through a solid medium or a fluid. Convection, on the other hand, occurs between a surface and a moving fluid.
How does heat pass through the flow circuit plate pattern?
Radiation consists of the emission of energy from surfaces with non-zero temperatures. It comes in the form of electromagnetic waves and without the need for a medium to conduct heat.
EQUIPMENT CONSTRUCTION AND OPERATION
Generally, PHE consists of a set of stainless steel plates. They come into a pedestal of carbon steel. The plates have gaskets. This is to ensure complete isolation of fluids in the system and four passage holes for hot and cold fluids.
This sequence of flow circuit plate patterns allows the formation of four parallel channels. This allows the alternate passage of fluids. Similarly, it allows the occurrence of heat exchange of this equipment through the surface of these plates. One channel presents an illustrative scheme with all the necessary components to build a plate heat exchanger.
Why structure of the circuit plate is complex?
Defining the configuration of an exchanger is something very complex, as it has a great impact on the thermal performance and pressure drop of the equipment. The PHE has numerous configuration possibilities since the following variables are considered: number of plates, number of channels, number of passes and channels per pass, location of hot and cold fluid inlets and outlets, and the type of system flow.
Conclusion flow circuit plate pattern
With the development of the prototype of the flow circuit plate pattern, several fundamental points we can discuss. First, it is worth noting that knowing the characteristics of the equipment is of paramount importance.
They directly interfere in its dimensioning (passes, plates, flow, feeding, etc.). Then, the choices of materials are also important to maintain the heat pressure.
