Albany, NY, United States

Mohawk Innovative Technology, Inc.

www.miti.cc
Albany, NY, United States

Mohawk Innovative Technology, Inc. is an American product and research and development technology company that develops oil-free foil bearings, magnetic bearings and non-contacting foil seals for high-speed rotating machinery, such as gas turbine engines, turbochargers, compressors, cryogenic pumps, variable high-speed motors/generators and machines. Wikipedia.


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Patent
Mohawk Innovative Technology, Inc. | Date: 2017-06-28

A heat exchanger in the form of a honeycomb with a plurality of rectangular or otherwise polygon in cross-section passages which share common walls with adjacent passages. Two or more flow paths each comprises a plurality of serially connected passages. Each flow path passes through the heat exchanger in a helical pathway, thus through one passage in a first vertical stack of passages, then through a lower passage in an adjacent second vertical stack of passages, then through a lower passage in the first vertical stack, then through a lower passage in the second vertical stack and in this helical manner to the outlet from the heat exchanger. Thus, the flow path comprises alternate passages in each vertical stack, and another flow path comprises the alternate passages in at least one of the vertical stacks not taken up by the first flow path, whereby the flow paths at least partially overlap each other thereby providing both counter-flow and co-flow.


Grant
Agency: National Aeronautics and Space Administration | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 124.78K | Year: 2016

A single shaft, low cost, long life, maintenance-free modular turbogenerator scalable from 1 to 100 kWe capacity range for human exploration of the moon and Mars is proposed. Operating at high spin speeds and based on a closed Brayton cycle using a binary He-Xe working fluid, the device combines five key enabling technologies to achieve high cycle and electrical efficiencies. MiTi's innovation is the seamless integration of 1) MiTi's Fifth Generation low power loss; high load, damping and temperature foil bearings with high reliability and long life; 2) a modular configuration that isolates the alternator elements from high temperature for improved thermal management; 3) a high efficiency direct drive permanent magnet high-speed alternator; 4) high adiabatic efficiency aero components; and 5) high effectiveness/low pressure drop ceramic/cermet based recuperator. The specific design has its heritage in an open Brayton cycle turboalternator with a demonstrated specific power 1.6 kW/kg.


Grant
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 149.80K | Year: 2016

Supercritical CO2 power cycles offer the promise of high efficiency in a compact footprint with a potential to offer disruptive changes to the US energy infrastructure. Applications include bottom cycles for electric co-generation power plants, nuclear power production, concentrated solar and other renewables as well as propulsion engines for space propulsion. Aerodynamic design theory dictates that the turbomachinery components for such power conversion cycles will operate at high rotation speed with high-power density. To effectively implement S-CO2 technology in commercial sized power conversion systems, scaled test systems must be created in order to address potential issues with full-scale designs from tens to hundreds of MW. Given the high operating pressures (20 to 30 MPa) and temperatures (700 to 800oC) in S-CO2, turbomachinery system scaling from the current sub-megawatt demonstration systems needs to be validated in more near scale sizes such as 10 MW output power scale. The proposed program begins with a review of the performance requirements for systems from 3 to 300 MW power systems, followed by a preliminary design study that will encompass all key aspects of turbogenerator design, including: 1) parametric thermodynamic analyses to establish the key system requirements and identify optimal operating condition; 2) aerodynamic component sizing, operating speeds and matching of turbine and compressor to maximize component efficiencies, 3) selection of generator approach and basic rotor layout (direct or geared) to accommodate the optimum aero component speeds; 4) size the recuperator, gas chiller and heat exchanger to minimize pressure drop and maximize efficiency; and 5) establish a notional model of the integrated system showing the overall system configuration layout. Commercial Applications and Other Benefits: The proposed research program will offer an improved understanding of the scalability of S-CO2 turbomachinery systems for power conversion in the 3 to 300 MW classes. These results will benefit the both scientific and engineering communities by providing improved understanding of methods and resources needed to develop efficient and reliable power conversion systems. Through evaluation of key design parameters, results will aid in design of future power cycle concepts in both small and large scale. The development of advanced turbomachinery concepts and proper understanding of scaling issues in large scale power conversion systems will directly contribute to a path towards commercial acceptance of the S-CO2 power cycle both for near term 1 to 10 MW systems and longer term for 100+ MW scale. The acceptance of S-CO2 cycles will benefit renewable energy technology such as waste-heat recovery and concentrated solar energy, as well as working in future nuclear plants and as bottoming cycles in existing fossil plants thereby reducing the nation’s use of fossil fuels and reducing environmental impact of existing plants. Key Words: Supercritical CO2, Closed Brayton Cycle, Energy Efficiency, Turbomachinery, Recuperator, Compressor, Centrifugal Compressor, Radial Turbine. Axial Turbine


Grant
Agency: Department of Defense | Branch: Navy | Program: STTR | Phase: Phase II | Award Amount: 488.74K | Year: 2015

The university and industrial team assembled by MiTi proposes to demonstrate the viability of using an advanced low cost out of autoclave composites manufacturing process for application to high speed composite flywheel energy storage systems. Besides conducting appropriate materials testing of the new process, testing of a high-speed titanium flywheel simulator system weighing over 200 lbs will be operated to demonstrate the capabilities of the shock tolerant foil bearing support system while spinning. Finally, fabrication and test of a prototype wheel using the out of autoclave process will be conducted


Grant
Agency: Department of Defense | Branch: Missile Defense Agency | Program: SBIR | Phase: Phase II | Award Amount: 999.70K | Year: 2015

The objective of the Phase II proposed effort is to design and demonstrate the ability to develop a high-speed composite flywheel-based Electromechanical Battery (EMB), to support deployment of high energy laser (HEL) technology for missile defense. The Phase I design studies assessed the EMB size, operating speeds and material requirements needed to achieve the energy density levels and charge/discharge rates and defined the power electronics and supporting foil bearings. Under Phase II, the EMB manufacturing approach will be validated through high speed testing, and overall system layout will be designed, with a goal to minimize system footprint and weight. To achieve the desired power and energy densities in a composite flywheel operating at surface speeds in excess of 1000 m/s in a low pressure, high g-force environment, such as those found in high altitude flight, will require robust, well damped and low loss bearings. The subcontractor will produce the composite flywheel structure and power electronics, while MiTi will be responsible for bearings, system integration and bench testing. Approved for Public Release 15-MDA-8169 (20 March 15)


Grant
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase II | Award Amount: 749.77K | Year: 2014

ABSTRACT: The overall objective of this proposed effort is to demonstrate bearing technology to meet the requirements for a high performance 1000 lbf thrust gas turbine engine. MiTi and its engine company subcontractor will establish simulator designs of two candidate engines representative of near and longer term applications of the advanced bearings to be demonstrated under this program. The engine subcontractor will establish engine modifications needed for bearing integration. Under Phase II the full scale high temperature bearings will be tested in a relevant environment including expected loads, speeds, temperatures and pressures. Testing will also include non-operating and operating vibration environment. In assessing both journal and thrust bearing requirements, the limitations of and/or engine modifications needed to make the technology suitable for use in engines will be identified. MiTi will use high temperature bearing alloys in the candidate bearings for operation at relevant high temperatures and will test possible alternative approaches to meeting the requirements. After testing in the test rigs with substantially different load/speed characteristics MiTi will assess the range of scalability possible with the advanced bearing designs. Finally, an updated transition plan for engine integration and testing will be provided, including engine modifications needed to integrate the bearing technology. BENEFIT: This effort will directly support the US Air Force initiative for propulsion systems and components to enhance advanced gas turbine engine performance normalized to cost specifically directed at advanced cruise missile engines. Research performed during this SBIR will result in new design capabilities and methodologies for wide ranging applications such as Integrated Power Units (IPU), gas turbine engines for use in UAVs, missiles, drones and both General and Regional Aviation aircraft. Key markets for the foreseeable future that will be served by foil bearings will include energy and environmental areas, including turbine powered generators as well as waste heat recovery systems and compressors for transportation and delivery of natural or/or hydrogen gas. This technology will also support MiTis current oil-free compressors, blowers for wastewater treatment and high speed drive motors.


Patent
Mohawk Innovative Technology, Inc. | Date: 2015-08-21

A heat exchanger in the form of a honeycomb with a plurality of rectangular or otherwise polygon in cross-section passages which share common walls with adjacent passages. Two or more flow paths each comprises a plurality of serially connected passages. Each flow path passes through the heat exchanger in a helical pathway, thus through one passage in a first vertical stack of passages, then through a lower passage in an adjacent second vertical stack of passages, then through a lower passage in the first vertical stack, then through a lower passage in the second vertical stack and in this helical manner to the outlet from the heat exchanger. Thus, the flow path comprises alternate passages in each vertical stack, and another flow path comprises the alternate passages in at least one of the vertical stacks not taken up by the first flow path, whereby the flow paths at least partially overlap each other thereby providing both counter-flow and co-flow.


Grant
Agency: Department of Energy | Branch: ARPA-E | Program: SBIR | Phase: Phase I | Award Amount: 225.00K | Year: 2015

The team of Mohawk Innovative Technology Inc., (MiTi), University of Texas – Center for Electro-Mechanics and MITIS of Belgium propose a truly transformative, ultra-high-speed and oilfree, Hyperlaminar Flow Engine (HFE) system that combines low cost viscous shear driven compressor and expander, an integrated low pressure drop recuperator, flameless combustor, permanent magnet generator, lubricant free air foil bearings, advanced power electronics and thermoelectric generator elements to meet the needs of a residential combined heat and power (CHP) plant with 40% electrical efficiency, 2kW total capacity (50/50 thermal/electrical) with low NOx and CO2 emissions (estimated at 4.1E-5 lb/MW-h, and


Grant
Agency: Department of Energy | Branch: ARPA-E | Program: SBIR | Phase: Phase II | Award Amount: 1.50M | Year: 2015

The team of Mohawk Innovative Technology Inc., (MiTi), University of Texas – Center for Electro-Mechanics and MITIS of Belgium propose a truly transformative, ultra-high-speed and oilfree, Hyperlaminar Flow Engine (HFE) system that combines low cost viscous shear driven compressor and expander, an integrated low pressure drop recuperator, flameless combustor, permanent magnet generator, lubricant free air foil bearings, advanced power electronics and thermoelectric generator elements to meet the needs of a residential combined heat and power (CHP) plant with 40% electrical efficiency, 2kW total capacity (50/50 thermal/electrical) with low NOx and CO2 emissions (estimated at 4.1E-5 lb/MW-h, and


Patent
Mohawk Innovative Technology, Inc. | Date: 2015-10-05

A foil journal bearing. A single foil engages an inner surface of and is mounted to the bearing housing. The single foil extends circumferentially of the inner surface and has a generally flat top foil portion and a bump foil portion which is disposed between the top foil portion and the inner surface of the housing. The bump foil portion comprises a plurality of circumferentially spaced ridges which engage the top foil portion and further comprises a plurality of generally flat portions between the ridges respectively and which engage the inner surface of the housing.

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