Patents by Inventor Jiazhen Ling
Jiazhen Ling has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220010934Abstract: The disclosed systems and methods are related to a positive displacement compression for use in various applications including gas processing, air conditioning, refrigeration, etc., to produce an isothermal compression to enhance the compression efficiency. The heat exchange enhanced compression is conducted by the use of cylinders partially filled with incompressible fluid (e.g., oil) acting as a piston compressing working fluid (e.g., CO2). The isothermal compression is contemplated in various modifications. A variety of heat exchange (cooling) techniques may be arranged either within the compression chamber or the compression process may be embedded in the heat exchanger to cool down the working fluid (for example, CO2).Type: ApplicationFiled: July 9, 2021Publication date: January 13, 2022Inventors: K. REINHARD RADERMACHER, VIKRANT C. AUTE, JIAZHEN LING, YUNHO HWANG, JAN MUEHLBAUER
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Publication number: 20210285727Abstract: A heat exchanger has first and second manifold portions and an array of substantially-parallel heat-transfer tubes extending between the first and second manifold portions. Each heat-transfer tube has an outer surface and an inner surface defining a conduit. In a cross-sectional view, the outer surface of each heat-transfer tube can form a first shape that is non-circular, and the inner surface of heat-transfer tube can form a second shape different than the first shape. Alternatively or additionally, at least one of the first shape and the second shape lacks reflectional symmetry in the cross-sectional view. Methods for fabricating such heat exchangers are also provided.Type: ApplicationFiled: March 9, 2021Publication date: September 16, 2021Inventors: Vikrant C. AUTE, Daniel Fernandes BACELLAR, K. Reinhard RADERMACHER, James M. TANCABEL, Jiazhen LING, Yoram Leon SHABTAY, Jan MUEHLBAUER
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Patent number: 10823465Abstract: A system for heating/cooling includes a plurality of thermoelastic modules. Each of the modules includes one or more structures formed of shape memory alloy, which converts from austenite to martensite upon application of a first stress and release latent heat from the conversion. During a first part of a heating/cooling cycle, a first module is stressed to cause conversion. The latent heat released from the first module is rejected to a heat sink while a second unstressed module absorbs heat from a heat source. During a second part of the heating/cooling cycle, the first and second modules are connected together to transfer heat therebetween for heat recovery. The cycle can be repeated indefinitely with the first and second modules alternating roles. Structures of the thermoelastic cooling material and specific applications thereof are also disclosed.Type: GrantFiled: June 2, 2018Date of Patent: November 3, 2020Assignee: University of Maryland, College ParkInventors: K. Reinhard Radermacher, Ichiro Takeuchi, Yunho Hwang, Yiming Wu, Suxin Qian, Jiazhen Ling
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Patent number: 10801750Abstract: Despite otherwise uncomfortable conditions in a surrounding environment, a customizable microenvironment can be created around a user to maintain a comfortable temperature and/or humidity level using a comfort unit. For example, the environment may be an office building where conditions are out of the comfortable range to save on energy or for other reasons, a factory/shop environment that is poorly conditioned, or an outdoor location with little to no conditioning. A sensing unit can monitor biometric and environmental data and can determine a comfort level of the user. The comfort unit can then dynamically respond to the determined comfort level and adjust the microenvironment to improve the user's comfort level. The comfort unit can follow the user as the user moves within the macro-environment, or can otherwise move within the macro-environment to achieve certain functions, such as recharging or spatial shifting of thermal load within the overall macro-environment.Type: GrantFiled: June 11, 2016Date of Patent: October 13, 2020Assignee: University of Maryland, College ParkInventors: K. Reinhard Radermacher, Vikrant C. Aute, Yunho Hwang, Jiazhen Ling, Jelena Srebric, Jan Muehlbauer, Rohit Dhumane, Yilin Du, Daniel Alejandro Dalgo Reyes, Nicholas W. Mattise
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Publication number: 20180283742Abstract: A system for heating/cooling includes a plurality of thermoelastic modules. Each of the modules includes one or more structures formed of shape memory alloy, which converts from austenite to martensite upon application of a first stress and release latent heat from the conversion. During a first part of a heating/cooling cycle, a first module is stressed to cause conversion. The latent heat released from the first module is rejected to a heat sink while a second unstressed module absorbs heat from a heat source. During a second part of the heating/cooling cycle, the first and second modules are connected together to transfer heat therebetween for heat recovery. The cycle can be repeated indefinitely with the first and second modules alternating roles. Structures of the thermoelastic cooling material and specific applications thereof are also disclosed.Type: ApplicationFiled: June 2, 2018Publication date: October 4, 2018Inventors: Reinhard K. RADERMACHER, Ichiro TAKEUCHI, Yunho HWANG, Yiming WU, Suxin QIAN, Jiazhen LING
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Patent number: 10018385Abstract: A system for heating/cooling includes a plurality of thermoelastic modules. Each of the modules includes one or more structures formed of shape memory alloy, which converts from austenite to martensite upon application of a first stress and release latent heat from the conversion. During a first part of a heating/cooling cycle, a first module is stressed to cause conversion. The latent heat released from the first module is rejected to a heat sink while a second unstressed module absorbs heat from a heat source. During a second part of the heating/cooling cycle, the first and second modules are connected together to transfer heat therebetween for heat recovery. The cycle can be repeated indefinitely with the first and second modules alternating roles. Structures of the thermoelastic cooling material and specific applications thereof are also disclosed.Type: GrantFiled: September 21, 2015Date of Patent: July 10, 2018Assignee: University of Maryland, College ParkInventors: Reinhard K. Radermacher, Ichiro Takeuchi, Yunho Hwang, Yiming Wu, Suxin Qian, Jiazhen Ling
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Publication number: 20180120873Abstract: Despite otherwise uncomfortable conditions in a surrounding environment, a customizable microenvironment can be created around a user to maintain a comfortable temperature and/or humidity level using a comfort unit. For example, the environment may be an office building where conditions are out of the comfortable range to save on energy or for other reasons, a factory/shop environment that is poorly conditioned, or an outdoor location with little to no conditioning. A sensing unit can monitor biometric and environmental data and can determine a comfort level of the user. The comfort unit can then dynamically respond to the determined comfort level and adjust the microenvironment to improve the user's comfort level. The comfort unit can follow the user as the user moves within the macro-environment, or can otherwise move within the macro-environment to achieve certain functions, such as recharging or spatial shifting of thermal load within the overall macro-environment.Type: ApplicationFiled: June 11, 2016Publication date: May 3, 2018Inventors: Reinhard K. RADERMACHER, Vikrant C. AUTE, Yunho HWANG, Jiazhen LING, Jelena SREBRIC, Jan MUEHLBAUER, Rohit DHUMANE, Yilin DU, Daniel Alejandro DALGO REYES, Nicholas W. MATTISE
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Publication number: 20160084544Abstract: A system for heating/cooling includes a plurality of thermoelastic modules. Each of the modules includes one or more structures formed of shape memory alloy, which converts from austenite to martensite upon application of a first stress and release latent heat from the conversion. During a first part of a heating/cooling cycle, a first module is stressed to cause conversion. The latent heat released from the first module is rejected to a heat sink while a second unstressed module absorbs heat from a heat source. During a second part of the heating/cooling cycle, the first and second modules are connected together to transfer heat therebetween for heat recovery. The cycle can be repeated indefinitely with the first and second modules alternating roles. Structures of the thermoelastic cooling material and specific applications thereof are also disclosed.Type: ApplicationFiled: September 21, 2015Publication date: March 24, 2016Inventors: Reinhard K. RADERMACHER, Ichiro TAKEUCHI, Yunho HWANG, Yiming WU, Suxin QIAN, Jiazhen LING
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Patent number: 8584479Abstract: An air conditioner having a refrigeration cycle including a compressor, a radiator, a pressure-reducing device and an evaporator, a total heat exchanger for performing heat-exchange between outdoor air and air under cooling operation using the evaporator for a room to be air-conditioned, and for ventilating the room to be air-conditioned, and a desiccant rotor having a moisture adsorbing area for adsorbing moisture in the outdoor air when the outdoor air is introduced, and regenerating the moisture adsorbing area by heat of the radiator, the outdoor air successively flowing through the total heat exchanger, the evaporator and the moisture adsorbing area in this order and then entering the room to be air-conditioned.Type: GrantFiled: August 5, 2010Date of Patent: November 19, 2013Assignees: Sanyo Electric Co., Ltd., University of MarylandInventors: Osamu Kuwabara, Reinhard Radermacher, Yunho Hwang, Jiazhen Ling
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Publication number: 20120031133Abstract: An air conditioner having a refrigeration cycle including a compressor, a radiator, a pressure-reducing device and an evaporator, a total heat exchanger for performing heat-exchange between outdoor air and air under cooling operation using the evaporator for a room to be air-conditioned, and for ventilating the room to be air-conditioned, and a desiccant rotor having a moisture adsorbing area for adsorbing moisture in the outdoor air when the outdoor air is introduced, and regenerating the moisture adsorbing area by heat of the radiator, the outdoor air successively flowing through the total heat exchanger, the evaporator and the moisture adsorbing area in this order and then entering the room to be air-conditioned.Type: ApplicationFiled: August 5, 2010Publication date: February 9, 2012Inventors: Osamu Kuwabara, Reinhard Radermacher, Yunho Hwang, Jiazhen Ling