Armfield Engineering Education
HEAT TRANSFER AND THERMODYNAMICS
HT32/HT37 Plate Heat Exchangers - Issue 1
HT32 - Plate Heat Exchanger
HT37 - Extended Reconfigurable Plate Heat Exchanger
The plate heat exchanger is extremely versatile and commonly used in the food and chemical processing industries where different combinations of plates and gaskets can be arranged to suit a particular application. The miniature exchanger supplied consists of a pack of plates with sealing gaskets held together in a frame between end plates. Hot and cold fluids flow between channels on alternate sides of the plates to promote heat transfer.
Description
HT32 - Plate Heat Exchanger
The HT37 is designed to be reconfigurable by the student, and can accommodate up to four sections of heating, each section providing an additional temperature measurement point for each fluid stream. In order to make the unit easy to reconfigure, these sections are supplied as pre-assembled groups of plates complete with an intermediate plate (containing the temperature measurement points). Using the four heating sections provided, students can compare heat exchangers of different heat transfer area and different numbers of passes. A quick release clamp system allows the different arrangements to be changed quickly and easily without using tools.
Also supplied is a pre-assembled regeneration section to demonstrate this important energy efficient method of heating. The regeneration section can be used in conjunction with one, two or three of the standard heating sections in different configurations.
Plate heat exchangers can be implemented in a wide variety of configurations, with parallel passes, serial passes, or combinations of both. For more advanced investigations into these effects, (e.g. for project work) a further twelve loose plates are supplied with the HT37. These can be used in conjunction with the plates from the pre-assembled modules to investigate these other configurations.
HT37 - Extended Reconfigurable Plate Heat Exchanger
The HT32 has a single heating section configured for multi-pass operation with passes in series. It comprises seven individual plates, which are clamped together using two stainless steel threaded bars and nuts. It is possible to dismantle and reassemble the heat exchanger using only three plates to demonstrate a single pass.
Ordering Specification
• A small scale plate heat exchanger system for use with an Armfield Heat Exchange Service Unit to teach the fundamental concepts of heat exchangers.
• Comprises a number of stainless steel plates, each with a pressed chevron pattern and a food grade silicon rubber sealing gasket, mounted in a frame.
• Easily dismantled for cleaning.
• A comprehensive instruction manual is included.
Technical Details
The plates used in these heat exchangers have been specifically developed by Armfield for use in miniature heat exchanger systems. They are fabricated from 316 stainless steel, with a pressed chevron pattern to promote turbulence and provide multiple support points. Silicone rubber gaskets are used on each plate to seal the adjacent flow channels from each other.
Plate details:
Plate overall dimensions: 75mm x 115mm
Effective diameter: 3.0mm
Plate thickness: 0.5mm
Wetted perimeter: 153.0mm
Projected heat transmission area:0.008m2 per plate
The plates are mounted in a frame incorporating fixed and moving end plates
with connections for hot and cold fluids. The exchangers are easily dismantled
for inspection of the heat transfer surfaces.
HT32 HT37
Number of plates: 7 (5 effective plates) Reconfigurable up to 20 plates
(12 effective plates)
Heat transfer area: 0.04m2 0.096m2 max.
Heat exhanger configuration: Single heating stage Configurable sections,
with a separate regeneration section
Temperature measurement points: 4 off:
• Hot fluid inlet
• Hot fluid outlet
• Cold fluid inlet
• Cold fluid outlet Up to 10 off:
• Hot fluid inlet
• Hot fluid interim positions (3)
• Hot fluid outlet
• Cold fluid inlet
• Cold fluid interim positions (3)
• Cold fluid outlet
Clamping mechanism: Dual screw threads with nuts Quick release, hand operated,
no tools required
Project work: 12 additional plates (supplied loose) give the option of exploring
many different configurations
Essential Armfield Accessories
HT37 requires the Armfield HT30XC, Computer Controlled Heat Exchanger Service Unit.
HT32 can be used with either the HT30XC or the HT30X Heat Exchanger Service Unit.
Shipping Specification
HT32:
Volume: 0.03m3
Gross weight: 6 kg
HT37:
Volume: 0.03m3
Gross Weight: 9.5kg
Overall dimensions
HT32:
Height 0.17m
Width 0.18m
Depth 0.39m
HT37:
Height: 0.17m
Width: 0.18m
Depth: 0.39m
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