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Next-Generation Oilless Cryogenic ORC Turbine Generator

Image: Next-generation oilless cryogenic ORC turbine generator. Credit: MHIMitsubishi Heavy Industries, Ltd. (MHI) and Mitsubishi Heavy Industries Marine Machinery and Equipment Co., Ltd. (MHI-MME), a wholly owned operating company of MHI based in Nagasaki, have successfully conducted demonstration testing of 100 kW class cryogenic ORC (Organic Rankine Cycle) power generation using the world’s first “next-generation oilless cryogenic turbine generator.” The innovative generator adapts the turbine generator featuring a hermetically sealed oilless structure, of the kind used in ORC generation, to cryogenic power generation. The testing demonstrated that with use of liquid nitrogen as the cryogenic energy source it is possible to secure a stable refrigerant cycle and the specified regeneration output without freezing-induced clogging, etc. even under conditions more severe than the low temperatures of conventional LNG (liquefied natural gas) cryogenic generation.

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Students Design Experimental Fuel System To Power Liquid-Propellant Rocket Engines

Members of the Experimental Rocket Propulsion Laboratory (ERPL) are building a state-of-the-art rocket fuel-feed system to test liquid-propelled rocket engines safely and consistently from Cecil Spaceport in Jacksonville, FL. Credit: ERPLAerospace Engineering students Alex Clay and Samir Ahmed have spent the past four years at Embry-Riddle Aeronautical University manufacturing complex liquid-propellant rocket engines. Now, as they near graduation, there is one last thing they’d like to do: Prepare for ignition. Along with fellow members of the university’s Experimental Rocket Propulsion Laboratory (ERPL), the two have built a state-of-the-art fuel-feed system in hopes of accomplishing that very goal. If successful, the hardware will offer future generations of rocketry students a safe and consistent way to field test their designs — which, according to sophomore Aerospace Engineering student Taylor Koehn, is currently the “most significant bottleneck” in the process of engine building.

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BCCK Boosts Propane Recovery with Next-Generation Technology at Cryogenic Gas Processing Facility

BCCK Boosts Propane Recovery with Next-Generation Technology at Cryogenic Gas Processing Facility Credit: BCCKBCCK, a leader in engineering, procurement, fabrication and field construction services, has applied patent-pending technology, G2R-Flex®, to provide enhanced propane recovery for a premier midstream group in Ohio’s Marcellus-Utica Basin. Utilizing a skidded BCCK patent-pending design, G2R-Flex® improved current 200 MMSCFD GSP facilities' propane recoveries to greater than 99 percent in ethane rejection and can also be applied to improve performance in ethane recovery.

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GENH2 Partners with H2 Genesis to Provide Small-Scale Hydrogen Liquefaction

H2 Genesis Partners with GenH2 to Provide Small-Scale Hydrogen LiquefactionGenH2, an industry leader in hydrogen infrastructure solutions, announced that the company has signed a partnership agreement with H2 Genesis, a leading liquid hydrogen infrastructure and operations company, to deliver liquid hydrogen across North America. In their first collaboration, GenH2, as manufacturer, and H2 Genesis, as owner-operator, will deploy the GenH2 LS20 Mobile Liquid Hydrogen System, an end-to-end liquefaction and storage system, to several locations in the United States starting with Florida.

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First Measurements of Hydrogen-Boron Fusion in a Magnetically Confined Fusion Plasma

The team in NIFS' Large Helical Device (LHD) Control Room. Credit: TAEAs fusion developers around the world race to commercialize fusion energy, TAE Technologies has pioneered the pursuit of the cleanest and most economical path to providing electricity with hydrogen-boron (also known as p-B11 or p11B), an abundant, environmentally sound fuel. Recently, the company announced, in collaboration with Japan’s National Institute for Fusion Science (NIFS), a noteworthy research advancement: the first-ever hydrogen-boron fusion experiments in a magnetically confined fusion plasma.

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The Next Generation in Cryogenics and Superconductivity

CSA's Young Professionals 2023CSA’s annual Young Professionals introduces outstanding engineers, scientists, and technicians (under 40) who are making fascinating contributions to the cryogenics and superconductivity industries. Debuted in the summer of 2006, this spotlight shines on future leaders who show the promise of making a difference in their fields. 

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Chase Coolers and Their Long History in CMB Science

Huan Tran Telescope (HTT) at the James Ax Observatory, Atacama Desert, Chile. Credit: NASAMaking advances in science requires the proper tools. Often those tools must be developed by scientists themselves. That’s the story of most science missions studying Cosmic Microwave Background radiation (CMB). Sub-Kelvin coolers developed by Chase Research Cryogenics (CSA CSM) have played a strategic role in many of these missions. Let’s look at two exciting examples.

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Launching a Groundbreaking Mobile Liquid Hydrogen System

Chris Wallington, GenH2 vice president, with LS20 mobile unit. Credit: GenH2GenH2, an industry leader in hydrogen infrastructure solutions, announced the launch of its groundbreaking LS20 mobile liquid hydrogen system, an end-to-end liquefaction and storage system. The innovative, mobile liquefaction unit offers a space-optimized, fully integrated liquid hydrogen solution to be used in a range of applications from transportation to energy backup, to accelerating the use of liquid hydrogen through pilot projects and testing. It will also be utilized as a lab setting for testing material, insulation, thermodynamic properties and use cases for its applications.

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Liquid Helium Ballast Refrigeration

Figure 1a: Gravimeter dewar. Credit: R. Fagaly 1b: Alternate design to minimize liquid helium. Credit: R. FagalyThe Need for Vibration-Free Cryogenics The measurement of local gravitational fields requires continuous, high precision and extremely stable measurements. In 1968, the development of the superconducting gravity meter (SG)[1] vastly improved the state of the art. In contrast to mechanical quartz or metal springs, SGs use a superconducting sphere levitated in an ultra-stable magnetic field generated by persistent currents in a pair of superconducting coils. This cryogenic design enabled sensitivities that can exceed 10-10 m/sec2 (i.e., 0.01 ppb of the earth’s gravitational field) and drifts less than 60 nm/sec2/year. Many gravity measurements (hydrology, volcanology, geothermal energy and postglacial rebound) require durations that last years, and, in many cases, decades. To fulfill this need, extremely long hold time cryostats were developed to maintain the SG at operational temperatures close to 4 K. Special techniques were also developed to prevent cryocooler-induced accelerations from contaminating the geophysical signals of interest. While most superconducting quantum interference device (SQUID) measurement systems[2] do not require multiyear measurement times, they benefit from improved cryogenic systems that minimize or eliminate the expenditure of liquid helium.

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Qubit Measurement Systems Right Out of the Box?

Figure 1: Recent developments enabling quantum technological applications at millikelvin temperatures, a) Cryogenic variable-temperature noise source, b) Bluefors IR filter, c) High-density wiring in an XLDsl dilution refrigerator measurement system. Credit: BlueforsNecessity of mK-Cryogenics-During the past years, advances in both lithography and millikelvin cryogenics have supported and enabled vast improvement in the sophistication of experimental research on electrical circuits that display uniquely quantum mechanical behavior. It comes as no surprise that dilution refrigerator measurement systems have moved beyond basic physics research contraptions, and into central focus in the new era of quantum engineering. Achieving millikelvin temperatures remains a prerequisite for many of the leading hardware candidates for quantum computing with solid-state devices. For example, superconducting quantum circuits need temperatures low enough to keep microwave thermal photon populations on the chip negligible. In addition, the amplifiers that are typically required to achieve high-fidelity dispersive readouts are also based on superconductors and operate at the lowest noise temperatures allowed by physical limits.

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The Development of an AMRR for Sub-Kelvin Cooling of Space Science Instrumentation - ICC21 Best Student Paper Award Recipient

Figure 1. A diagram of the AMRR system. Credit: University of Wisconsin-MadisonIntroduction-Cryogenic detectors have higher sensitivity and better energy resolution than alternative sensors, making them an attractive option for space exploration and essential for observing low energy photons in the near- or far-IR, X-ray and submillimeter ranges.[1] Since NASA’s first cryogenic missions in the early 1980s, increasingly complex space detectors have required continuous advancement in cryogenic technology.[2]

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Back to the Future: Combining Hydrogen Hybrid Technology and Enhancing Solar & Wind

The Dylan Energy SystemThe first time I saw the first prototype of the Dylan Energy system, I thought of old Doc Brown and Back to the Future. Remember them? Doc invented something called the ‘Flux Capacitor.ʼ With the Dylan Energy system and our partners, we are capable of consuming 400 tons daily of municipal solid waste (MSW), commonly referred to as landfills, and producing 576 mW of electricity during a 24-hour period of time. This includes medical/drugs/sharpies; municipal and urban waste; industrial, pesticides and their containers; biomass; animal housing; coal; ashes from incinerators; sewage; galvanic sludge; organic sludge from petrochemical; materials with low radioactivity; used oils; batteries; tires; waste of explosive material; hazardous industrial waste; and plastics (with no restrictions).

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New Green Storage System Offers Renewable Energy On-Demand

Image: UCF inventors (left to right) Jayanta Kapat, Marcel Otto and Ladislav Vesely are shown next to a prototype demo of the cryogenic flux capacitor used in the invention. Photo credit: Karen Norum, UCFBack to the Future movie fans may remember the term “flux capacitor” as a fictional device that allows for time travel. That device still doesn’t exist, but a University of Central Florida storage technology does use a different type of flux capacitor developed by NASA. While trying to find a way to store renewable energy (like solar and wind) and then use it when needed, UCF Pegasus Professor Jayanta Kapat and researchers Marcel Otto and Ladislav Vesely found that NASA’s Cryogenic Flux Capacitor (CFC) could be part of the solution.

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Commonwealth Fusion Systems Opens Fusion Energy Campus on the Fastest Path to Bring Clean Fusion Energy to the World

Image courtesy of CommonwealthCommonwealth Fusion Systems (CFS) officially opened its new campus to support the development and deployment of commercial fusion energy. The ceremonial event included visits from U.S. Secretary of Energy Jennifer M. Granholm, U.S. Senator Elizabeth Warren, U.S. Senator Edward Markey, U.S. Representative Lori Trahan, Massachusetts Lieutenant Governor Kim Driscoll, along with a host of state and local leaders.

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Honeywell’s Fuel Cell Powertrain Project Comes Alive

NEWBORN launch event. Credit: Source: Honeywell AerospaceHoneywell Aerospace is confident that an EU-funded consortium it is leading can deliver a “commercially viable” high-power fuel cell powertrain for regional aircraft applications. Ground tests of the entire 1MW propulsion system – including an electric motor – will be performed in 2026 under the Clean Aviation-backed Newborn project. Although the system will only be taken to technology readiness level (TRL) 4 – or TRL5 for most components – Ondrej Kotaba, principal scientist at Honeywell Aerospace, insists the program is focused on eventual commercial applications.

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Oxygen Diffuser Project Underway in Kentucky

Oxygen diffuser project KentuckyThe U.S. Army Corps of Engineers Nashville District is executing a sustainability project funded by the Section 212 Program to install an upstream diffuser system at Wolf Creek on the Cumberland River in Jamestown, Kentucky. The district is partnering with power preference customers, the Southeastern Power Administration, and Tennessee Valley Authority to construct a cryogenic facility downstream of the dam and install 50,000 linear feet of oxygen diffuser lines that reach into Lake Cumberland.

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The Moon is Too Hot and Too Cold; Now It Could Be Just Right

With temperatures on the moon ranging from -410° to a scorching 250° F, it’s an understatement to say that humans will need habitats with heat and air conditioning to survive there long term. But heating and cooling systems won’t be effective enough to support habitats for lunar exploration or even longer trips to Mars without an understanding of what reduced gravity does to boiling and condensation. Engineers haven’t been able to crack this science – until now. “Every refrigerator, every air conditioning system we have on Earth involves boiling and condensation. Those same mechanisms are also prevalent in numerous other applications, including steam power plants, nuclear reactors and both chemical and pharmaceutical industries,” said Issam Mudawar, Purdue University’s Betty Ruth and Milton B. Hollander Family Professor of Mechanical Engineering. “We have developed over a hundred years’ worth of understanding of how these systems work in Earth’s gravity, but we haven’t known how they work in weightlessness.” A team of engineers at Purdue led by Mudawar, who is collaborating with NASA’s Glenn Research Center in Cleveland, has spent 11 years developing a facility to investigate these phenomena. The facility is called the Flow Boiling and Condensation Experiment (FBCE). Initial designs were tested on Zero Gravity Corporation’s (Zero-G) weightless research lab, a specially modified Boeing 727 that flies parabolic maneuvers to create the reduced gravities on the moon and Mars as well as the weightless conditions in space. Following in-flight testing, NASA Glenn and the agency’s Biological and Physical Sciences Division assisted Mudawar’s team in creating a smaller version of the experiment to fit into the Fluids Integrated Rack on the International Space Station. After passing NASA safety and readiness reviews, FBCE launched to the space station in August 2021 and has since helped researchers to begin to unlock the mystery of how boiling and condensation work in the extreme environments of space. These answers are in data the team is collecting from two sets of FBCE experiments taking place on the station. Last July, the facility’s first experiment finished gathering all the data that Mudawar says scientists need to understand how reduced gravity affects boiling. In the coming months, the equipment for the second experiment will launch to the orbiting laboratory as part of a Northrop Grumman commercial resupply services mission for NASA (NG-19) to gather data on how condensation happens in a reduced gravity environment. Both experiments making up the facility will remain in orbit through 2025, allowing the fluid physics community at large to take advantage of this data. “We are ready to literally close the book on the whole science of flow and boiling in reduced gravity,” Mudawar said. “Astronauts on the moon will need air conditioning systems, refrigeration systems and many other systems that all require boiling and condensation. Because of the new understanding we’ve received from data showing how these phenomena are influenced by reduced gravity, we are able to provide guidance into how to size the equipment, how to design it effectively and how to predict its performance.”   The researchers are preparing a series of research papers unpacking data the FBCE has collected on the International Space Station, adding to more than 60 papers they have published on weightlessness and fluid flow since testing their facility on Zero-G flights at the beginning of the project. Answering decades-old questions - “The papers we have published over the duration of this project are really almost like a textbook for how to use boiling and condensation in space,” Mudawar said. “For more than 60 years, since the beginning of spaceflight, the field has known that boiling and condensation would be ideal for space, but previous attempts to study these concepts in microgravity hadn’t been successful.” Each decade the National Academies publishes a report that guides NASA, the White House and Congress on areas of research to prioritize for funding over the next 10 years. In the 2011 report, numerous scientists recommended that the role of gravity in controlling vapor-fluid behavior be considered as one of those priorities for space exploration. The FBCE project was created in response to the decadal report. The farther missions are from Earth, the more likely that the spacecraft for those missions will need nuclear power. Compared to other types of processes that enable heating and cooling in space, boiling and condensation are much more effective at transferring heat for these nuclear-powered vehicles and habitats. Boiling and condensation would also allow heat, ventilation and air conditioning systems to be more compact and lightweight. Since the 1970s, Mudawar has been working to make it possible to use boiling and condensation to tackle energy transfer and temperature control challenges for a wide range of systems. Examples include high-temperature turbine systems, supercomputers, data centers, avionics, hybrid vehicle power electronics, hydrogen fuel cells, metal alloy heat treating, particle accelerators and fusion reactors. The largest experiments of their kind - According to Mudawar, FBCE is the first set of experiments to provide data that is extensive and systematic enough for developing the models engineers need to design all sorts of space systems using boiling and condensation in reduced gravity. “We now have a basis for comparing and contrasting data for both Earth gravity and reduced gravity in pursuit of modeling tools that can be applicable to a broad range of gravities,” Mudawar said.  Mudawar and his students have been developing three sets of predictive tools over the past 11 years based on FBCE data. One set of tools puts the data into the form of equations that engineers can use to design space systems. Another set identifies fundamental information about fluid physics from the data, and the third set is computational models of the fluid dynamics.  All together, these models would make it possible to predict which equipment designs could operate in lunar and Martian gravity. FBCE is NASA’s largest and most complex experiment for fluid physics research. Between February and July last year, the facility successfully conducted 234 tests, yielding nearly 3,800 data points and an equal number of high-speed video records. More than 35 engineers and technicians from different teams across NASA Glenn have worked on this project, helping turn design concepts from Mudawar and his students into a facility that could be installed into the space station. These teams included Glenn’s FBCE Engineering, Safety and Mission Assurance, Science, Software, and Technician teams, and Fluids and Combustion Facility Operations teams. Fifteen past and current Purdue PhD students have assisted Mudawar on all aspects of collaborative work with NASA. Two Purdue doctoral candidates, V.S. Devahdhanush and Steven Darges, assisted in monitoring the experiments on the space station via a dedicated workstation set up at Purdue. The Purdue team also provided recommendations for refinement of operating conditions for subsequent tests to continuously improve science yield per test. Data from the FBCE would benefit not only space systems, but also technology on Earth. Using lessons they learned about boiling from this data, Mudawar and his team invented a new charging cable design for electric vehicles that would allow them to charge in less than five minutes. Today’s most advanced charging cables take more than 20 minutes to charge an electric vehicle. A patent application for this fast-charging cable invention has been filed through the Purdue Research Foundation Office of Technology Commercialization. “The amount of data coming out of the FBCE is just absolutely enormous, and that’s exactly what we want,” Mudawar said. Source: Issam Mudawar, mudawar@ecn.purdue.edu Image: An experiment designed by Purdue University researchers to study the effects of reduced gravity on boiling is loaded onto a Cygnus spacecraft in preparation for launch onboard an Antares rocket to the International Space Station. Credit: Northrop Grumman/NASAWith temperatures on the moon ranging from -410° to a scorching 250° F, it’s an understatement to say that humans will need habitats with heat and air conditioning to survive there long term. But heating and cooling systems won’t be effective enough to support habitats for lunar exploration or even longer trips to Mars without an understanding of what reduced gravity does to boiling and condensation. Engineers haven’t been able to crack this science – until now.

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A World-First in HTS Magnets

Tokamak EnergyOxford-based Tokamak Energy has built a world-first set of new generation high temperature superconducting (HTS) magnets to be assembled and tested in fusion power plant-relevant scenarios. Creating clean, sustainable fusion energy requires strong magnetic fields to confine and control the extremely hot, positively-charged hydrogen fuel, which becomes a plasma several times hotter than the sun.

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Civil-Engineering Work for the Major Upgrade of the LHC Completed

Aerial view of CERNOn January 20, CERN celebrated the completion of the civil-engineering work for the High-Luminosity Large Hadron Collider (HL-LHC), the major upgrade of its flagship collider, the LHC. Approved in June 2016 and due to start operating in 2029, the HL-LHC will considerably improve the performance of the LHC by increasing the number of particle collisions and thus boosting the potential for discoveries. The completion of the civil-engineering work marks the start of the transition towards the HL-LHC era; the new components for the collider will be installed in the caverns and galleries that are now ready. 

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Why the Hubble Telescope is Still in the Game — Even as JWST Wows

Astronauts replace a guidance sensor on the Hubble Space Telescope in 1999. Credit: NASA/Science Photo LibraryOnce the James Webb Space Telescope (JWST) began operations last year, the comparisons began. Astronomers and others online posted side-by-side images of the same celestial objects captured by JWST and the Hubble Space Telescope, pointing out how much crisper and more detailed those from JWST can be. But don’t count Hubble out yet. The telescope, from NASA and the European Space Agency, is still making big discoveries, after going strong for nearly 33 years.

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