Vaippavaippalämmönvaihtimet

Vaippavaippalämmönvaihtimet, also known as jacketed heat exchangers, are a type of heat transfer device where one fluid flows through an inner pipe or vessel and another fluid flows through an outer jacket surrounding it. The heat transfer occurs across the wall separating the two fluids. This design allows for efficient heating or cooling of the inner fluid by the outer fluid without direct mixing.

These heat exchangers are commonly used in industries where precise temperature control of liquids or gases is crucial. Applications include food processing for pasteurization and cooling, chemical processing for reactions requiring specific temperatures, and pharmaceutical manufacturing for sterile processing. They are particularly useful for handling viscous fluids or those that tend to foul, as the jacketed design can sometimes facilitate easier cleaning.

The construction typically involves an inner tube or shell and an outer shell or jacket. The heat transfer area is the surface area of the inner component. The flow paths of the two fluids are independent. Depending on the application, the fluids can flow in counter-current, co-current, or cross-current arrangements, each offering different thermal performance characteristics. Materials of construction vary widely, chosen based on the properties of the fluids being handled and the operating conditions, such as stainless steel, glass, or specialized alloys. Their effectiveness relies on maintaining good thermal contact between the inner and outer surfaces and optimizing flow rates to maximize heat transfer.