- Change and maintain consistent pasteurization temperature.
- Transfer heat without contaminating the heating fluid.
- Energy saving is achieved by reusing the heating fluid to heat the fluid in a repeatable cycle.
- Heated water and cleaning fluids for efficient clean-in-place (CIP) systems.
- Accurate temperature control is achieved during the sterilization stage.
Lower pressure drop
The heat exchange efficiency of a plate heat exchanger is five times that of a shell and tube design, so in many cases, you can utilize more heat by replacing your existing shell and tube heat exchanger with a compact plate heat exchanger.
Gasket spaces are formed between the plates in a plate heat exchanger, and these spaces alternate between two fluids—one hot and one cold. This design provides very high heat transfer efficiency because the plates create a much larger surface area than a shell and tube design that fits in the same space.
Heat exchange efficiency
- A higher heat transfer coefficient can be obtained due to corrugated plate and higher speed.
- Allows more heat transfer due to pure countercurrent flow and close temperature.
- Higher energy recovery can be achieved due to these closer temperature methods.
| Overall Heat Transfer Coefficient - U - | ||
|---|---|---|
| Liquid-to-Liquid Heat Transfer | Heat Transfer Coefficient W/(m2 K) | Btu/(ft2 °F h) |
| Shell and Tube | 150-1200 | 25-200 |
| Plate and Frame | 1000-4000 | 150-700 |
Reduce maintenance
Plate heat exchangers are easier to maintain and operate than shell and tube heat exchangers because they are easier to disassemble and inspect. Of course, you can also easily remove the plates in a plate heat exchanger for service and maintenance, while shell and tube heat exchangers are more laborious and harder to access inside. Although product build-up or scale coating on the surface of the plate heat exchanger can reduce the heat exchange efficiency of the heat exchanger because the plate heat exchanger adopts a smaller modular design, the heat exchange efficiency of the plate heat exchanger is higher than that of the large shell and tube heat exchanger. taller and easier to clean.
Smaller footprint
Scalability
Capital expenditure
The close-to-temperature approach means that the cold fluid can be heated to a temperature very close to the temperature of the hot fluid, and allows for more regeneration and energy recovery, making plate heat exchangers a good choice. Small temperature differences between product and medium can prevent burnout of products with moderate to high sugar or protein content.
In addition to capital expenditures for the purchase of equipment, capital costs should also include transportation, handling, installation, and maintenance costs over the life of the equipment. Plate heat exchangers weigh about 1/16 the weight of shell and tube heat exchangers and occupy only 1/10 the footprint, which means immediate savings in shipping, handling, and installation costs. In addition, the plate heat exchanger can be assembled and disassembled on site.
Plate Type
- For viscous products, plate heat exchangers require the correct choice of plate type.
- For products with particles, plate heat exchangers require special plates with ground contact points and/or wider gaps.
| Average Gap | Particle Size | Fiber Length | Pulp (%) | Viscosity CPS | |
|---|---|---|---|---|---|
| Typical Industrial Plate | 2.4-3.95mm | Dia 0.5mm | 1mm | 2 | 2500 |
| Typical Sanitary Plate | 3.95mm | Dia 0.5mm | 1mm | 3 | 5000 |
| Low Contact Point Plate | Up to 8mm | Dia 0.5mm | 5mm | 7 | 1000 |
- Milk and dairy pasteurization
- Ultra-high temperature sterilization
- Beverage and energy drink pasteurization
- Standard and pulpy juice pasteurization
- Beer wort and beer pasteurization and cooling
- Liquid egg processing
- Bottled water treatment
- Soups, sauces, and starch heating
- Ketchup and mustard heating and cooling
Frequently Asked Questions
What are the advantages and disadvantages of plate heat exchangers and shell and tube heat exchangers?
If you’ve ever looked into liquid cooling products, you’ve probably come across two options, shell, and tube or plate heat exchangers. Shell-and-tube and plate heat exchangers work on the same principle, exchanging heat between the two fluids by heat conduction, but they are constructed very differently. If you don’t understand the benefits of both designs, it can be difficult to decide which one is best for you. Let’s take a look at their respective advantages.
Advantages of shell and tube heat exchangers
- Smaller designs can reduce costs.
- Service just got easier.
- O-rings make them inexpensive to repair.
- A better solution for seawater coolant or other fluids that risk clogging tight spaces.
- Better mounting options (tee, union configuration, etc.) are available.
- The ideal solution for hydraulic power units, mining machinery, seawater cooling vessels, and swimming pool heating.
Disadvantages of shell and tube heat exchangers
- Takes up a lot of space.
- Difficult to clean and maintain.
Advantages of plate heat exchangers
- With a more compact design, less space is required.
- Low-cost option where stainless steel is required.
- Higher work pressure and ability.
- Higher temperature capability.
- Ideal for small district heating, beverage cooling, food and pharmaceutical production, and low load oil cooling applications.
Disadvantages of plate heat exchangers
- Relatively low operating temperature.
- Additional maintenance costs due to gaskets.
- Not suitable for products with very high viscosity or very large particles.
- The energy transfer effect of two fluids with a large temperature difference in a plate heat Exchanger is not as good as that in a shell and tube heat exchanger.
- Greater risk of leakage.
What is the difference between a plate heat exchanger and a shell and tube heat exchanger?
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