Alfa Laval Aalborg Micro
The Aalborg Micro is a compact exhaust gas heat exchanger especially designed for waste heat recovery from small gas turbines as well as from small engines & clean process flue gas. Furthermore, it is also unique when used as an economizer/ condensing economizer e.g. for gas or diesel fired boilers.
Applications
The Aalborg Micro can operate with a diversity of media, including water, steam, triethylene glycol (TEG) and thermal fluid oil (TFO). To date, Alfa Laval Aalborg Micro heat exchangers have been used in different applications across a wide range of industries.
Design
The Aalborg Micro is build in a durable design featuring a heating surface consisting of a number of coaxial tubes arranged in a vertical or horizontal cylindrical shell plate. This, ensures a long-term, trouble-free performance and offers capacities ranging from approximately 250-5000 kW.
The heating surface of the Aalborg Micro has been developed for easy maintenance. Cleaning can be performed either with a pyrolysis process when operating in dry-run mode or using optional soot blower rings with compressed air, steam or water.
When necessary, an integrated regulation damper allows a part of the exhaust gas to bypass the unit’s heating surface.
Features Advantages Benefits Values
Water tube coil design with
serrated spiral fin tubes
Water tube coil design with serrated spiral fin tubes
Integrated
Low media volume
Extended heating surface No external by-pass needed
Dry-run possible
Adjustments
Low enertia
Lower footprint & weight Lower footprint
Cleaning possible during operation of engine, turbine or process
Output can be adjusted
More up-time
Less space occupied & relatively lower investment
Less space occupied & relatively lower investment
Less downtime
regulation damper Integrated
during opeartion
Ability to clean the heating surface
according to the need No exceed production Extend the time in
cleaning device
during operation by using water, steam or compressed air
Horizontal & vertical version
between major cleaning e.g. via dry-run mode
Less downtime
Easy to retrofit & optimum
for in- & outdoor installation Basic Micro design Geometry
Flexibility
space utilization
Weight (incl. insulation) 400 kg to 3900 kg Diameter (incl. insulation) 950 to 1870 mm
Height (incl. insulation) 1700 to 2800 mm Media inlet/outlet header DN100
Exhaust inlet/outlet header DN450 to DN1000 Insulation 150 mm
Technical data
Capacity 250 – 5000 kW
Exhaust gas side
Maximum inlet temperature 600 °C (dry-run 530 °C)
Minimum outlet temperature Dependent on engine fuel and exhaust gas composition
Pressure loss According to customer requirement
Media side – Aalborg Micro as heat exchanger Through the tubes Water/TEG/TFO Quantity Max. 160000 kg/h Maximum pressure 39 bar(g)
Maximum media temperature 365°C
Media side – Aalborg Micro as steam generator Through the tubes Water/steam Quantity Approx. 4000 kg/h Maximum pressure 39 bar(g)
Standard norm (Industrial) PED + GB + ASME Class (Marine) DNV/GL/ABS/Lloyds etc.
