Alfa Laval Aalborg Hukka-8 HRSG Modules

Alfa Laval Aalborg natural-circulation Hukka-8 HRSG Modules

with extended-scope delivery

Introduction

Alfa Laval’s highly efficient and robust water-tube Aalborg

Hukka-8 Heat Recovery Steam Generators (HRSGs) and related

steam system equipment are always tailored to your specific

requirements. Our entire supply is designed and engineered to

last for the lifetime of the production unit, utilizing proprietary Alfa

Laval control and monitoring systems combined with first-class

manufacturing standards and surface treatment.

Alfa Laval offshore waste heat recovery and steam system

products are also available as modules for streamlined installation

in the yard. Our modularized supply ensures the heat recovery and

steam system components work together in an optimal way, and

it reduces the number of external interfaces. This secures safe and

efficient operation on an overall system level. On your end, it also

simplifies the development and project execution of equipment

related to the steam system, as the major part steam system

responsibility is handed to us.

Deriving from our decades of experience in making offshore boiler

modules and onshore combined cycle heat recovery plants,

Alfa Laval steam system components are both fit for application

and suitable for the harsh offshore operating environment. This is

supported by wide reference base of projects with different marine

and offshore classification requirements. Thanks to our wide

experience base, you can rest assured on regulatory compliance

and operational excellence of Alfa Laval HRSG systems, all the

way from manufacturing to complete service life of installation.

Benefits of choosing Alfa Laval Aalborg Hukka-8 HRSGs

• Improved efficiency of electricity production (up to 20%

increase in fuel-to-power efficiency)

• Over 30% reduced gas turbine fuel consumption

• Smaller carbon footprint

• Support from Alfa Laval steam system experts

• Possibility of seamless integration with Alfa Laval steam

system equipment, designed and manufactured specifically

for marine and offshore  applications

• Availability of Alfa Laval’s global service network

Natural-circulation HRSGs

Alfa Laval’s HRSG design offers the possibility of natural

circulation evaporators, which combine maximum uptime with

reduced capital and operational expenditure. Natural-circulation

evaporators operate without circulation water pumps, which are

known to be high-maintenance items due to harsh operational

conditions and fluctuations involved at sea. The circulation in

the evaporators is induced naturally by the density difference

between vapour and liquid, providing trouble-free operation with

minimum O&M involvement throughout HRSG lifetime.

Alfa Laval has extensive experience with natural-circulation

HRSGs in both land and marine environments. Our first land-

based installation was in the 1990s, and marine installation

in the 2000s. Since then, we have gained a market-leading

position in natural-circulation HRSGs for marine segments.

Cruise ships and icebreakers are among the more challenging

environments for HRSGs and the associated steam system, due

to highly intermittent operating profiles combined with a dynamic

seafaring environment. The fact that Alfa Laval dominates in

these applications is evidence of our expertise in HRSGs and

natural circulation.

If you specify, Alfa Laval can also deliver pump-driven HRSG

systems.

Benefits of natural circulation

• Lower capital expenditure (CAPEX)

• Lower operational expenditure (OPEX)

• Maximized uptime and operational safety

• Lower parasitic electricity consumption for steam generation

• Easy boiler water chemistry control. Tolerant to varying

make-up water quality and no need for condensate

polishing

• Lower weight and less crowded layout due to simpler

circulation line piping when compared to conventional

forced-circulation systems

Extended scope

Alfa Laval’s supply comprises a high number of in-house

products beyond the HRSGs themselves, such as plate heat

ex-changers, steam drums, feed-water deaerator tanks,

condensate tanks, blow-down tanks and solutions for boiler water

chemistry management. The remaining equipment, such as

pumps, instrumentation and valves, are sourced from reputable

makers who are suitable for the offshore environment and your

specification levels. The wide internal scope, combined with Alfa

Laval steam system expertise, ensures professional customer

support – all the way from concept development to ser-vice

requirements over the solution lifetime.

For more information on Alfa Laval’s overall steam system  offering

for the offshore market, please see our “Offshore steam systems

and services” brochure.

Typical technical data (per HRSG)

• Gas turbine output: Up to ~55 MWe

•  Steam flow: Up to 80 t/h

•  Steam pressure: Up to 80 bar(g)

•  Flue gas flow: Up to 150 kg/s

•  Steam production: From saturated steam to 550°C super

heated steam