Scraped Surface Heat Exchangers Overview

A type of scraped surface heat exchanger (SSHE) where the product flows in a thin layer along the heat transfer surface. This allows for efficient heat transfer even with viscous or heat-sensitive fluids.

A type of scraped surface heat exchanger (SSHE) where the product fills the entire space between the heat transfer surface and the rotating blades. This is suitable for fluids with moderate viscosity.

The movement of blades in a scraped surface heat exchanger (SSHE) can be horizontal or vertical depending on the design. This affects the flow pattern of the product and the direction of heat transfer.

The space between the rotating blades and the heat transfer surface of a scraped surface heat exchanger (SSHE). This clearance can be fixed or variable depending on the design.

A type of blade used in scraped surface heat exchangers (SSHE) which gently scrapes the product off the heat transfer surface. They are often used in applications where gentle mixing and low shear stress are required.

A type of blade used in scraped surface heat exchangers (SSHE) that swing back and forth, scraping the product off the heat transfer surface. They are often used in applications where aggressive mixing or high shear stress is required.

In a liquid full scraped surface heat exchanger (SSHE), the product is moved upwards due to centrifugal force as blades rotate. This creates a circulation pattern within the product.

In a liquid full scraped surface heat exchanger (SSHE), vaporized product rises in the free space close to the rotating blades. This is due to the heat transfer process.

A type of heat exchanger that uses rotating blades to scrape the surface and prevent fouling, ensuring efficient heat transfer.

A common application of SSHEs, involving the formation of crystals within a product. This process plays a key role in the texture and quality of many frozen foods.

A key factor in optimizing crystallization in SSHEs. This involves controlling the temperature and shear conditions inside the exchanger, which directly influence crystal size and distribution.

The flow patterns and forces that influence the crystals' formation and size in SSHEs. Controlling these aspects is crucial for achieving the desired product quality.

The way the fluids move through the heat exchanger. These patterns influence heat transfer efficiency and the overall quality of the product.

The ability of a material to withstand high temperatures without degrading. This property is essential for SSHEs handling various food products.

The formation of a layer on the heat transfer surface of an SSHE, which can reduce the heat transfer efficiency. SSHEs are designed to minimize fouling.

The process of moving heat energy between a product and the SSHE, ensuring the desired temperature changes occur. A critical aspect of SSHE operation.

A method used to determine the time particles spend within a scraped surface heat exchanger (SSHE). It involves introducing a tracer (like salt solution) at the inlet and measuring its concentration at the outlet over time. This helps understand how effectively different particles are processed within the SSHE.

A method used to measure the concentration of a substance in a solution, often based on its ability to conduct electricity. Electrical conductivity is directly proportional to the concentration of ions in a solution.

The process of measuring and analyzing the distribution of times that different particles take to flow through a system, like a SSHE, using a tracer substance.

The speed at which particles travel through a system, determined by factors like the flow rate and the geometry of the system. Faster-moving particles can contribute to more efficient processing.

The extent to which a system is affected by changes in its input, like the introduction of a tracer substance. A process with a high sensitivity will respond quickly and significantly to changes, while one with low sensitivity will respond slowly and minimally.

The range of time that different particles take to flow through a system, like a SSHE. A narrow RTD implies consistent processing times for all particles, while a wider distribution indicates a variation in particle residence times.

The process of investigating how different factors like particle size, fluid viscosity, and flow rate affect the residence time distribution (RTD) of particles within a system, like a SSHE. This analysis provides insights into how to optimize processing and ensure consistent product quality.

The time spent by particles within a SSHE, crucial for effective sterilization.

The rate at which heat is transferred from the heated surface to the product in an SSHE.

The potential for damage to the product due to the heat and mechanical forces within an SSHE.

The process of using high temperatures to kill harmful microorganisms in food products, often employed in SSHEs.

A type of SSHE designed for specific milk products like ghee and khoa, often in continuous or batch operation.

Thermal Induced Dairy Product, often made with SSHEs.

This type of fan uses a rotating impeller to move air radially outwards, creating a high pressure.

These fans are characterized by their high flow rate and moderate pressure. They are often used for applications where clean air is needed.

These fans are similar to forward curved fans but are designed for higher pressure applications. They're commonly used for moving dust-laden or humid air.

These fans use blades oriented along the axis of rotation to move air parallel to the fan's axis. They are known for their high flow rate and low pressure.

This refers to the volume of air that a fan moves in a unit of time. It's measured in cubic feet per minute (CFM).

This is the force a fan needs to overcome to move air through a system. It's measured in inches of water column (WC) or Pascals (Pa).

This refers to the density of air, which is influenced by altitude and temperature. It affects the fan's performance.

This refers to the specific type of application where the fan will be used. This can include factors like the type of air being moved, the environment, or the desired noise level.

A type of fan characterized by curved blades that force air outward, leading to high pressure and high flow rates, but with efficiency decreasing as flow increases beyond a specific point.

A type of fan designed for clean air applications with higher efficiency, but operating on the same principle as backward curved blades.

A type of axial flow fan where blades are positioned on a rotating shaft, moving air parallel to the shaft. This fan is characterized by low pressure, high flow rate, but has lower efficiency.

A type of axial flow fan with a design improvement over propeller fans, resulting in higher efficiency and delivering medium pressure and high flow rates.

A type of axial flow fan with the highest pressure output, suitable for high pressure applications. It features guide vanes that improve efficiency.

The redirection of air flow by the blades of fans, influencing the flow pattern and performance.

Turbomachines that provide high air velocity with low static pressure, used in applications like ventilation and air circulation.