Pre-engineered Products Cycles

Choose the best cycle for your applications

Integral gear based turbo-expander provides enables numerous thermodynamic cycles implementations.

Low-temperature Organic Rankine Cycle Unified Architecture

Benefit from the most advanced ORC architecture for low-temperature waste heat recovery or geothermal.

See architecture

High-temperature Organic Rankine Cycle Unified Architecture

Benefit from the most advanced ORC architecture for high-temperature waste heat recovery, bottoming cycles or biomass.

See architecture
See modules construction

Multi-stage Saturated Steam cycle

Leverage inexpensive saturated steam generators in high efficiency power cycle by suppressing moisture-related blades erosion in turbine last stages.

Steam-ORC cycle

Leverage ORC and steam respective advantages to build low temperature dry condensing with compact turbines

See architecture

UA-1 ORC

Field-proven versatile cycles

ORC Low temperature

Unified architecture for low-grade heat sources

ORC Low temperature

Unified architecture for low-grade heat sources

UA-1 ORC example

Active participation of QxLoop team

UA-2 ORC: The all-purpose architecture for high temperature, high efficiency ORC

Ongoing project for industrial waste heat recovery

UA2

General purposes ORC architecture

Key points:

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STORC

Steam-ORC cycle

The steam-ORC (STORC) cascading cycle merges together the advantages of steam and refrigerant (Organic) Rankine cycle without having to bear the drawbacks.

For the high temperature part, the steam cycle brings its high-power density, boiler safeness and high performance.
Then the ORC takes the expansion from the point where steam reaches low temperature, suppressing steam issues (blades erosion, performance) and bringing its flexibility and operational simplicity.

Thanks to this unique assembly, the steam-ORC cycle is better than single loop steam cycle or Organic Rankine Cycle.

Double cycle also offers turbine downsizing opportunities by adjusting vapor density in the middle of the overall expansion. This means:

Smaller turbines, therefore easier to inspect and dismantle
Smaller turbine outlet piping, making it easier to take advantage of the air condensing technologies for cleaner and more efficient solutions.

On top of high performances and ease of operation, SO-Cycle is inherently cost competitive.

Process Flow Diagram

Steam-ORC Cycle

Allow using Furnace with lower steam temperature

Furnace declining reciprocating grates. This technology, probably the most common for heavy duty biomass boiler furnace, offers the following advantages:

Cost-competitiveness
Low emissions thanks to precise distribution of fuel thickness through the entire grid Excellent performance.
Ruggedness has been extensively demonstrated during decades of operation. Actuators are hydraulic, resulting in high reliability, even in the event of above nominal friction due to fuel insertion between grates. Good ability to handle different fuel.

This allows having a versatile operation, able to update fuel composition during the entire life span of the installation (fuel mixing possible)

Steam-ORC Cycle: Qxpander-based turbo-generator

Allows for multiple expansions in one package

Turbo-generator is designed to achieve:

Ruggedness: integral gear construction is field-proven, bulky and long-lasting. Well-proven trip-tolerant Shaft sealings from top manufacturers.
Ease of operation: easy to dismantle, direct access to small-size turbines for inspection/dismantling. Horizontal splitting of gearbox for fast servicing
Efficiency: multiple bodies and multiple shafts speed allow for the finding of optimal rotational speed at each expansion stage

Best-in-class turbo-generator package for long-lasting cost competitive STORC

Steam-ORC Cycle : Dry condensing

Enables super high condensing efficiency at low costs.

Air condensing is now highly optimized thanks to HVAC. Low volume flow condensation (moderate pressure of ORC working fluid) enables the following optomizations

Cost-competitive (HVAC widely installed equipement) -> allow for over-sizing at low cost
Cutting-edge technology (EC-motor, ultra-optimized fans, etc.)
Easy to install (independent, factory assembled units -> fit in std ISO maritime container)

Steam-ORC Cycle

Typical performances

The combination brings high performance for low stresses on the boiler.

Pre-engineered modules

Integral gear based turbo-expander provides enables numerous thermodynamic cycles implementations.

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