A spiral tube heat exchanger consists of a coil assembly enclosed in a compact shell designed to optimise heat transfer efficiency and space. Sentry spiral assemblies feature welded tubes to manifold joints for durability and strength. A coil assembly is welded to a head and fitted in a compact shell.
Due to their compact design and high heat transfer efficiency, spiral tube heat exchangers are excellent heat exchangers. A spiral tube heat exchanger consists of one or more spiral coils connected in a circular pattern to a header through which fluid is introduced into the coils.
A spiral coil is installed in a shell in which another fluid is circulated around the tube, causing heat to be transferred between the two. Due to their ability to transfer a large amount of heat with less space and size, curved tubes have attracted considerable research attention.
The performance of simple helical coils for heat transfer enhancement has been extensively studied experimentally and numerically. Few researchers have studied the effect of pitch and curvature ratio on heat exchanger performance. Review papers for this dissertation work are categorised under helical and spiral tubes, compact heat exchangers, and applications of nanofluid to enhance heat transfer.
The application of a graphical tool to the preliminary design of heat exchangers was investigated. Initially developed for shell and tube heat exchangers, the approach was then extended to spiral heat exchangers and welded compact exchangers. Their tool illustrates the design space where a number of geometrical parameters meet the heat duty and allowable pressure drops.
A design space is enclosed between three curves: a curve representing the particular heat responsibility, and curves that represent the pressure drop on the hot and cold sides. In this demonstration, the designer sees how to integrate design conditions with the choice of the unit for the appliance. A spiral tube heat exchanger is a coil assembly fitted in a compact shell, which optimises heat transfer efficiency and space. Sentry spiral assemblies feature welded tubes to manifold joints for durability and strength.
The coil assembly is welded to a head and fitted into a compact shell. A spiral tube bundle has a compact profile and occupies a smaller footprint than a shell and tube design due to the spaces or gaps between its coils. As the tube bundle is coiled, the space needed for tube bundle removal is significantly reduced.
In the case of exotic materials, spiral tube heat exchangers reduce the amount of material used by replacing the channels, heads, and tubesheets of a conventional shell and tube design.
Typically, the shell side is smaller than a shell and tube design, and there is no need for tube supports or pass dividers.
Types Of Sentry Spiral tube Heat Exchanger
- Shell and tube heat exchanger.
- Plate heat exchangers.
- Plate and shell heat exchanger.
- Adiabatic wheel heat exchanger.
- Plate fin heat exchanger.
- Finned tube heat exchanger.
- Pillow plate heat exchanger.
- Waste heat recovery units
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