Waste Heat Recovery

Waste Heat Recovery / HRSG

Waste Heat Recovery systems utilise existing energy sources in order to efficiently generate thermal energy, process heat or electricity.

These systems reduce energy costs, provide carbon credits for emission trading systems and help the environment by reducing emissions.

Applications:

Gasco provides a comprehensive range of Waste Heat Recovery Systems for the following:

Gas Turbines
Gas and Diesel Engines
Thermal Oxidizers
Furnaces
Ovens

Gas Turbine heat recovery systems Gasco offers a complete turnkey plant comprising:

Inlet duct
Divertor valve
Divertor stack
Supplementary burner and controls
Waste Heat Recovery Unit
Exhaust Stack

Forms of Heat Recovery:

Heat Exchangers to heat thermal transfer fluids:

Thermal Oil
Hot Water
Water Gylcol
Steam

Heat Exchangers to heat thermal transfer fluids:

Thermal Oil
Hot Water
Water Gylcol
Steam

Heat Exchanger to:

Waste Gas Streams (Thermal Oxidizer)
Combustion Air (Fired Heaters and Thermal Oxidizers)
Make Up Air (Ovens and Furnaces)
Make Up Air – Space Heating

Gasco can provide for either individual pieces of equipment or supply a complete turnkey operating system for either a new application or modifying an existing plant.

Our range of services includes:

Survey/Analysis of existing systems
Engineering
Hardware
Erection
Commissioning
Turnkey Solutions

ERK Energy Systems, Germany

Gasco is a licencee of world renowned boiler design company Eck Rohr Kessel (ERK) of Germany. ERK specialises in custom built boiler designs for a wide variety of boilers including process waste heat, gas turbines, MSW, RDF, Medical and Clinical Waste Incinerators. To date over 6,000 ERK boilers, HRSGs and high temperature recuperators have been supplied worldwide.

ERK Single Drum Natural Circulation Corner Tube Boiler has unique features and advantages compared to conventional bi-drum boilers:

Smaller steam drum hence lower thermal stress and inertia
Bottom drum eliminated reducing site construction time
Downcomer tubes outside flue gas path hence lower stress and better natural circulation
Quicker start up and ramp up time
Steam drum and hence boiler layout flexibility

See https://www.erk-systems.com for further details.

HRSG – Heat Recovery Steam Generators

Heat Recovery Steam Generators (HRSG) are boilers that harness the thermal energy in the high temperature exhaust gases exiting the Gas Turbine by generating steam. Frequently the GT exhaust is augmented with additional heat input using supplementary firing using in-duct burners between GT and HRSG and utilising the excess oxygen in the flue gases without needing additional combustion air. The HRSG can also operate in Fresh Air Firing mode by incorporation of a combustion air fan and an automatic switchover mechanism with timing valves. Where HRSG's are used to generate steam for process it is Cogeneration. If the steam is then used to drive a steam turbine it would be Combined Cycle.
The term HRSG can also be loosely used for Waste Heat Boilers for Reciprocating Engines, Process and Incinerator Waste Heat.