Plate Heat Exchanger (PHE)

Heat exchange is the transfer of heat energy from a high-temperature fluid to a low-temperature fluid. Heat energy has the property of moving from high to low.

As a method of heat exchange, a bulkhead method in which two types of fluids are made to flow through a solid wall separated by metal etc. and transmit the energy of each other. This method is easy to handle both fluids and versatile to operate with different types of fluid. By using this method, high-temperature and low-temperature fluids are made to flow alternately, and thermal energy is transferred to lower the temperature of the high-temperature fluid.

Bulkhead type heat exchangers are used in a wide range of industrial fields, such as the heating, cooling, concentration, vaporization, condensation and heat recovery of fluids. In contrast to the bulkhead method, a direct contact method is also used in which fluids such as air and water are brought into direct contact and the temperature of each other is transmitted. This method is frequently used in cooling towers that promote evaporation of water with air and cool warm water, and barometric condensers that directly cool gases such as steam and warm air with cold water.

 

Air conditioners

Air temperature in the room is conditioned by cooling and warming the air by the indoor unit. Heat exchangers are installed in both the indoor unit and the outdoor unit respectively. So, one air conditioner system is made up of two heat exchangers.

 

 

Radiators

Water that used to cool the engines of cars or motorcycles is cooled with air.

 

 

Water Heaters

Hot water that is used at home is heated with a heat exchanger.

 

 

Heated Pools, Hot Springs, Aquariums

Heat exchangers are used to heat the water in pools, cold springs, and to control the water temperature in aquariums.

 

Plate Heat Exchanger

 

Overview

It has a high heat transfer performance by using a thin plate with a corrugated pattern for the heat transfer section, and it is used in a wide range of applications because it is lightweight and compact.

 

• High heat transfer coefficient: The overall heat transfer coefficient is much larger than that of the multi-tube type, because a turbulent flow effect can be obtained.
• Self-cleaning effect: The turbulent flow effect makes it difficult for dirt to adhere to the surface of plates.
• Compact: The footprint is small due to the high heat transfer coefficient and the maintenance space within the frame itself.
• High heat exchange efficiency: Since heat exchange can be performed in a complete counter flow, it is possible to approach a difference of 1°C between the inlet temperature on the high temperature side and the outlet temperature on the low temperature side.
• Increase/decrease heat transfer area: Since the heat transfer plates are arranged in vertical-stack structure, it is possible to change the heat transfer area by increasing or decreasing the number of heat transfer plates. (However, it depends on the dimensions of the frame.)

 

Structure

We create our heat transfer plates by pressing thin sheets of corrosion-resistant metal such as stainless steel or titanium using specific mold and apply gaskets as a sealing method. Several heat transfer plates are stacked between the fixed and moving frames, which have a guide bar for suspending the plates, and then tightened with tightening bolts. Gaps between the heat transfer plates allow the fluid to flow. High-temperature fluid and low-temperature fluid flow through every other plate, usually forming a countercurrent flow. Many types have specialized functionality, depending on the plate press shape and structure.