Supercritical CO2



Concepts NREC  Knows Supercritical CO2

Supercritical Carbon Dioxide (sCO2) Brayton Cycle energy conversion systems have the potential to provide the world with cleaner and more affordable power.

Today, coal, nuclear, gas, and concentrating solar energy plants use the Rankine Cycle (steam and water) to convert heat energy to electricity. The sCO2 Brayton cycle has the potential to reach thermal efficiencies much greater than the Rankine cycle. Capital costs of the turbomachinery can also be lower because the high density of the sCO2 requires smaller turbomachinery.

Primary Cycle Efficiency (without cogeneration):

  • Old Rankine Cycle Plants – low 30 percent
  • Newer plants – Mid 30% to mid 40%
  • sCO2 Brayton cycle – potentially greater than 50%. It also significantly reduces water usage due to the reduction in the heat rejected from the cycle.

Interest in this technology is high, and governments, including the U.S. Department of Energy (DOE), are funding research to support the commercialization of this promising new technology. Concepts NREC has been awarded two Small Business Innovation Research grants (SBIRs) to help solve the many technical challenges involved in bringing sCO2 technology to the market.

The areas that Concepts NREC is working on to help solve some of the technical challenges of sCO2 power generation are: Improving Efficiency and Reducing Costs for the Supercritical C02 Design Process, optimizing the choices for the recuperator effectiveness vs. turbomachinery efficiencies that can be economically achieved and Magnetic Bearings for Supercritical CO2 Service.

Concepts NREC, as the experts, works with clients to design and analyze the types of turbomachinery required for an efficient sCO2 system. Are you ready to start the conversation about your sCO2 needs? Contact us


Technical Papers

Development of A Meanline Model for Preliminary Design Of Recirculating Casing Treatment In Turbocharger Compressors
Presented At: ASME Turbo Expo 2018

A Novel Non-Radial Turbocharger Turbine Created Using Numerical Optimisation
Presented At: National Laboratory of Engine Turbocharging Technology of China 2016

Designing Turbochargers with an Integrated Design System
Presented At: ASME Turbo Expo 2013

Turbocharging the Internal Combustion Engine - (Presentation Slides) 
Presented At: ASME Turbo Expo 2013

Aero Design Challenges in Wide-Operability Turbocharger Centrifugal Compressors
Presented At: SAE World Congress 2012

Meanline Modeling of Ported Shroud Turbocharger Compressor
Presented At: ASME Turbo Expo 2012

Experimental and Computational Analysis of Impact of Self Recirculation Casing Treatment on Turbocharger Compressor
Presented At: SAE World Congress 2010

Modeling and Manufacturing of Turbocharger Compressors 
Presented At: SAE World Congress 2010

Radial and Mixed Flow Turbine Options for High Boost Turbochargers
Presented At: 7th International Conference on Turbochargers and Turbocharging


Case Studies


Concepts NREC designs, manufactures and tests turbochargers and turbocharger components for diesel and gasoline engines as well as compressor and turbine stages for gas turbine engines. We can also provide auxiliary system components for engines including fuel, oil and water pumps.

Waste Heat Recovery

Concepts NREC has extensive experience in the field of waste heat recovery, including providing ORC turbines for exhaust heat recovery from diesel and gas turbine engines.

Air, Land, Water

We cover the full range of transportation industries, including passenger cars, trucks, F1 racing, off-road vehicles, marine craft of all sizes, and aircraft piston, turbojet and turbofan engines.

Case Studies


Concepts NREC Develops, Manufactures, and Sells its Own Products

In addition to contract manufacturing complete turbomachinery products for customers, Concepts NREC manufactures and sells specialized turbomachinery products that serve well-defined niche applications.

These products are jointly developed with customers who first establish a market need for a new or improved technology. Concepts NREC then supplies the development expertise to turn their specification into a successful product. However, rather than just providing services for a fee, development costs are shared, enabling Concepts NREC to establish additional applications and markets for the product and generate noncompetitive sales. The results allow development costs to be amortized over larger production quantities, and both companies further benefit by producing a better product at a lower cost.

Agile Products Support (APS)

APS is Concepts NREC’s software maintenance and support program that elevates us from just a software provider to a valued partner. 

An APS subscription is included with all annual licenses and is a highly-recommended option for perpetual software licenses. Every software customer is supported for one month following purchase for any installation questions that may arise. Learn more on the Agile Products Support Membership Benefits Datasheet

  • Free software updates
  • One business day response times
  • Expert technical assistance
  • Major discounts on software workshops
  • Discounted professional development course
  • Annual balloting system for development planning
  • Annual Meetings

Fundamentals of Turbocharging

This book is the first comprehensive treatment of turbochargers and turbocharging to be made widely available in the last twenty years. It is intended to serve as both an introduction to the turbocharger itself, and to the problems of matching a turbocharger with an internal combustion engine. The turbocharger is a highly
sophisticated device which has been described as aerospace gas turbine engineering allied to mass production techniques. Undoubtedly the key to commercial success lies in achieving the correct compromise between performance, life, and cost, as this runs a continuous thread through the book.
Regular price $135.00

Related Textbooks


Axial and Radial Turbines

Hany Moustapha, Mark F. Zelesky, Nicholas C. Baines, and David Japikse


The design basics presented in this textbook provide the analyst with a single source that is necessary to determine if a radial or axial turbine should be used to meet the design point conditions of the sCO2 system.


Centrifugal Compressor Design and Performance

David Japikse


This textbook provides a detail analysis of centrifugal compressors that are expected to be required for moderate to high pressure ratios (Pr=2.0 to 4.0) for sCO2 systems using the recompression cycle.

Compressor Surge and Stall

Ronald C. Pampreen

The parallel operation of two compressors used in a typical Recompression sCO2 cycle will require the mastery of the techniques described in this textbook to avoid surge and stall in compressors as well as to control the splitting of the flow between the two compressors.


Introduction to Turbomachinery

David Japikse and Nicholas C Baines
This textbook provides the best overall summary of the basic design aspects of turbines and compressors.  It is an essential “must read” for any engineer who is serious in not only understanding the turbomachinery designs required for sCO2 systems but for any thermodynamic cycle or process that uses turbomachinery.

Advanced Experimental Techniques in Turbomachinery

David Japikse, Editor
The experimental techniques presented in this textbook are relevant to the enhanced and sophisticated instrumentation and data collection that is needed to optimize the performance of the turbomachinery used in the advanced sCO2 system.